Product Highlights

Significantly simplify the offline LED driver

Power factor correction and

Precision constant current output

Realize the ultra -long life design (no electrolytes without electrolytes Capacitor)

Eliminate optocoupler and all secondary current control

circuit

Eliminate control circuit compensation circuit

Simple side PWM lighting interface [ 123]

Universal input voltage range

LNK403-409 Optimized the flashless TRIAC lighting Ecological intelligence #8482;-Energy-saving

Single -level PFC combined with output CC control

greatly improves efficiency, gt; 90%can be achieved

Reduce the number of components

123] Remote open/off function of low standby power

(230 volt AC voltage lt; 50 MW)

Accurate and consistent performance

]

Compensation route input voltage changes

The frequency shake greatly reduced the size and cost of the EMI filter

Advanced protection and security functions

Short -circuit protection automatic restart [123 ]

Opening road failure detection mode

Reap a lag automatic heat shutdown

satisfy all other signal pins on the drainage pipe and

PCB and AT packaging

[

[ 123] Green Packaging

Packaging without halogen and compliance with ROHS standard

offline LED drive

Explanation

Linkswitch Ph. The earth simplifies the LED implementation driver to require long life, high efficiency, power factor gt; 0.9 and two-way silicon lighting function (LNK403-409). Single -level combination power factor and constant current controller eliminate the switch stage and electrolytic capacitor. The Linkswitch PH device uses advanced one -sided control to provide accurate constant current control without requiring optocoupler and current sensing circuits. Linkswitch PH integrates a 725 V power FET, a continuous mode PWM controller, one for self -partial pressure, frequency jitter, protective circuit including cycle current limit and lagging heat shutdown.

Point function description

Drainage (D) Sales: This pin is a power field effect transistor leak connection. It also provides internal working current operations that start and steady.

Source quotation: This pin is the power field effect pipe source connection. It is also bypass, feedback, reference and voltage monitor pins.

Wing (BP) pin: This is the 5.9 V power supply generated inside the connection point of the external bypass container. This pin also provides an output power capacity value by selecting bypass pins.

Feedback (FB) pin: Feedback pins are used for output voltage feedback. The current and output voltage that enters the feedback pin. The feedback pin also includes the circuit to prevent opening load and overload output conditions.

Reference (R) pins: The pin is connected to the external precision resistor for configuration (LNK403-409) and non-Triac lighting (LNK413-419) operation mode.

Voltage monitor (V) pin: This pin and external input cable peak detector interface, consisting of rectifiers, filter capacitors and resistors. This external current is used to control the stop logic of the circular voltage (UV) and overvoltage (OV), which provides a feed output current and remote opening/off function for control.

Function description

A integrated controller and high -voltage power field effect transistor integrated in a package. The controller implements high -power factor and constant current single -stage output. Linkswitch PH controller includes feedback circuits (9.V) and oscillator, lagging over temperature protection, frequency jitter, circulating current limit, automatic restart, inductive correction, power factor and constant current control. Feedback pin current control characteristics The following figure illustrates the feedback pin current. The above IFB (skipping) switch is disabled below IFB (AR), and the device enters the automatic restart state.

The feedback pin current is also used to restrain the maximum value

The duty occupation ratio limit overload and opening conditions. The reduction of this duty ratio has also promoted the monotonous output current to start the characteristics of preventing over -shooting.

Reference sales

The reference needle passes the external resistor. Select the internal reference for the selected value to determine the operation mode (LNK403-409) and the non-dimming (LNK413-419) operation and line owe voltage and overvoltage threshold voltage monitor pins. When used for non-light or PWM lighting, when LNK413-419 is used, the external resistor should be 24.9 kW ± 1%. For high-voltage and general input voltage design, the low-line input voltage is designed to be 49.9 kW ± 1%. The phase angle AC light and LNK403-409, the external resistor should be 49.9 kW ± 1%. One percent of the resistance is that the resistance tolerance is recommended to directly affect the output tolerance. Other resistance should be used. The power gain of bypass capacitor power gain selection Linkswitch PH device has a customized internal gain to a full power or reduced output power settings. This allows choosing a larger device to minimize the twoCauses of loss and efficiency. The value of power gain is valuable for bypass capacitors. The full power is set to select 100 millivoltors and low -power settings (to improve efficiency). This bypass capacitor is set up at the same time as an internal power gain as an overcurrent protection (OCP) threshold. Unlike greater equipment, LNK4X3 power gain is inseparable. LNK4X3 uses 10 millivoltors capacitors.

Switching frequency

The switching frequency is 66kHz. Further reduce the electromagnetic interference level, and the switching frequency shake (frequency adjustment) is about ± 1 kHz.

Soft start

This controller includes a soft start time function, which can inhibit the automatic restart protection function of the soft start period (TSOFT). Essence When starting, connect the switch to the maximum occupation ratio of the output power. The total soft launch period is soft start.

Remote opening/level and ECOSMART

The voltage monitor pins have a 1V threshold comparator to connect at the input terminal. This voltage threshold is used for remote opening/control control. When receiving the signal, the voltage monitor pump is used to disable the output (voltage monitoring pipe foot through optocoupler optical pipe ground) connecting switch pH to complete the current before the enforcement of the internal power field effect tube.

The remote opening/off function can also be used as an ECO mode or the power switch to turn off the connection switch pH and keep it in a very low power consumption state. When the connection switch pH is opened remotely after entering, this mode will start the normal startup program next time when the worst is started when the bypass reaches of 5.9 V, the delay from remote start to startup can be equal Complete discharge/charging cycle time. This reduced energy consumption remote closing mode can eliminate expensive and unreliable series mechanical switches.

The internal 5.9 V reguser is charged by bypass capacitors by introducing a current to the bypass to 5.9 V. The bypass pins are the internal power supply voltage node. The power field effect tube is opened, and the device is stored in the bypass container from energy. Extremely low -power internal circuit consumption allows the connected switch pH to work continuously from the current of the drainage pipe. 10 or 100 mF bypass capacitors are sufficient to be high -frequency decoupling and energy storage. In addition, there is also a 6.4 volt and joint adjustment device clamped by the bypass to provide a current to the bypass pins, and the pins voltage is 6.4 V via an external resistance. This helps to increase the operating efficiency through the bias winding switch pH. It is recommended to be a current provided by the bias winding when running normally.

Automatically restart

If there is an open road failure (the opening feedback pin resistance output short circuit or overload state controller enters the automatic restart state mode. , Will open the ring situationThe soft start period is lower than the IFB (AR) threshold. Under such faults, the power consumption is reduced to the minimum transfer/automatic restart circuit to turn on the power (the same is that the duty cycle ratio is usually the usual situation, as long as the failure continues to exist, the DCAR can be used. It is excluded within the shutdown time, and the power supply will remain automatically restarted until the completely closed time count is complete. You must pay special attention to adjust the size of the output capacitor to ensure that the feedback pins of the pins after the soft launch (TSOFT) are higher than the IFB (AR) to ensure that it is guaranteed The threshold of the power supply successfully starts. After the soft startup period, automatically restart only when the feedback pin current is lower than the IFB (AR)

overcurrent protection

The detection power field effect of the current limit circuit detection circuit detection power field effect The current in the tube. When the current exceeds the internal threshold (ILIMIT), the power FET is closed within the remaining time of the cycle. The leading advantage to the anti -hidden circuit prohibit the current limit of the short -circuit power field effect (TLEB). The cutting time has been set up at the forefront, so that the reverse recovery of the current peak capacitor and the rectifier will not cause the power field effect tube to be proof prematurely.

Line owed voltage/overvoltage protection

This device includes The minimum starting voltage and maximum operating voltage of the circuit owl voltage and overvoltage detection are detected by the voltage monitor pins. The external peak of the detector consisting of a diode and a capacitor provides the input cable peak voltage through a resistance to the voltage monitor pin. , Keep the connection switch at the pH, until the input cable voltage reaches the underwriting threshold. When the power is disconnected, the IUV- to prevent the re-start after the output. , Stop the mandatory link switching pH (the switch cycle after the current is completed). Once the line voltage returns to normal equipment to return to normal operation. A small amount of lag is provided on the OV threshold to prevent noise triggering. When the power field effect tube is closed, the rectifier DC The high -voltage wave surge capacity increases to the rated voltage (725V) of the transistor of the power field effect, because there is no reflex voltage and a nail on the leakage and drainage pipe. The controller crash temperature. The threshold is set to 142 ° C and the typical value is 75 ° C. The power field effect of the power field re -enabled.

Safety Operation Area (SOA) Protection

The device also has a safe operating area (SOA) protection in this case, and the FET switch is prohibited from 40 cycles of 40 cycles in this case. The peak of the mode switching current reaches the ILIMIT threshold connection time of less than tona (SOA). This protection mode is prohibited during the automatic restart of the protection equipment under the short -circuit conditions of LED. The SOA protection mode maintains the active state operation under normal circumstances.

Application Example

14 W TRIAC Small Lighting High power factor LED Drive Design Example Figure 7 The circuit schematic diagram of the two -way crystal tube is displayed on the LNKSWITCH PH series device based on LNK406EG. It is optimized to drive LED string with a voltage of 28V and a constant flow of 0.5A (± 5%) the ideal PAR light retro application. The design in the universal input voltage range 90 volts of communication electricity to 265 volt AC voltage, but the specified output current tolerance is within the line voltage range of 90 volts of AC voltage to 132 volt voltage (this is configured for high -end applications, pass the high -end application, pass through high -end applications. Simple component value change). The main goal of this design is the TRIAC AC lighting device compatible with standard compatibility, with a wide range of lighting (1000: 1500 mAh: 0.5 mAh), high efficiency ( gt; 85%) and high power coefficients ( gt; 0.9 0.9 To. The design can prevent the following errors from the temperature of empty load, overload and output short circuit state.

Circuit description

Connect the switch pH device (U1) integrates the power field effect transistor, the controller and the startup function are integrated into a single package to reduce component counting and typical implementation. The configuration is a part of the inverter of the isolation continuous conduction mode. U1 provides a high -power factor through internal control. This algorithm combines the characteristics of small input capacitors. Continuous conduction mode operation leads to reduced peaks and average root currents. Both reduce EMI noise, allowing simpler and smaller EMI filter components and improving efficiency. Keeping output current adjustment does not require a secondary induction fluidal resistance to improve efficiency.

Input level

Fund F1 provides a component failure protection at RV1 to provide a clamping clamp during the swarm of differential lines, so that the peak drain voltage of the U1 is lower than the internal 725 V rated value. Power field effect transistor. Bridge rectifier BR1 rectifies the voltage of AC lines. Electromagnetic interference filtering is connected to the isolation barrier between the primary and secondary and the second level between the capacitor (C7) with the L1-L3, C1,

R16

and the R17 and the safety level. The role of the resistor R16R17 is to inhibit L1, L2, C1 and AC line impedance. Small volume capacitors (C2) need to provide a low -impedance power switching current for one -power supply. The maximum value of C1 and C2 is limited to keep the power factor greater than 0.9.

The pH primary connection switch

Provide U1 with peak line voltage information through the D2 rectification AC peak charge C3. The voltage monitoring pins of U1 are then input to the current through R2 and R3 as the current. This induction current is also used by the device to set the line input overvoltage and under pressure protection threshold. The resistor R1 provides a time constant of the time constant to MUCH. VoltageThe monitor pin current and feedback pin current are used for internal control average output LED current. For the phase dimension application of the two -way crystal gates, the 49.9 kΩ resistor (R4) is used to provide a linear relationship between the voltage monitor pin on the voltage monitor pins between the input voltage and the output current. The resistor R4 also sets up internal circuit input under pressure and overvoltage protection thresholds.

Diode D3 and VR1 clamp the drain voltage to the safe level, because the impact of the leakage is because of the impact. During this period, during this period, the rectifier input voltage of the reverse current flowing through the U1 through the C2 voltage decreases lower than that of the reflection output voltage (VOR). Auxiliary winding from the diode D6, C5, R7, and R8 from the transformer. The capacitor offers the pins of the internal controller of the C4U1 bypass pins (power supply). During the startup period, C4 is charged to about 6 V from the internal high -voltage current source, which is connected to the device drainage. This allows components to provide the working power current from the R5 to provide bias power through R5. The capacitor C4 also selects the output power selection mode (10 μF to reduce power) to reduce the dissipation and improve efficiency in U1).

Feedback Positive -voltage winding voltage is proportional to the output voltage (setting the winding group from the number of turns between bias and secondary). This can monitor the output voltage without secondary feed components. The resistor R6 converts the bias voltage to the current and feeds it into the U1 feedback pin. The internal engine combination feedback pins current in U1, the voltage monitoring pin current and leakage current information to provide a constant output current exceeding 1.5: 1 output voltage changes (LED string voltage fixed line input voltage changes. The output voltage output excess voltage protection circuit is set by D7, C12, R20, VR3, C13, Q3, and R19. The current. When the current drops below 20 μA, the parts enter the automatic restart state, switch to a disabled 1500 millisecond, and allow the output and bias time voltage to decrease.

Output rectification

The transformer is secondary time. The winding group is filtered by D8 and C8 and C10. The combination value of the Schottky Blood Diode and C8 and C10 was selected to select the peak to the peak to the peak and the LED ripple current. The designed ideal output capacitor value can be increased. TheAR15 provides small pre -loads, which limits the voltage under the output empty load conditions. The compatibility compatibility of the phase dimension control compatibility of the crystal gates can provide low -cost output lighting requirements. The device introduces the number of weighing times in the design. Because the power consumed by LED lighting is much lower than the current of the entire lamp is lower than the two -way silicon current in the lighting device. The range and/or flashing flashing light and darkness. The relatively large L LThe impedance of the ED light on the line allows the capacitance when the bell bidirectional gates are connected due to the influx of the input end charging. This will also cause bad behaviors similar to ringing bells may cause bidirectional silicon current to fall to zero and close. In order to overcome these problems, the two circuits, active damping deities and passive air venomes. These disadvantages circuits increase their loss, thus reducing efficiency supply. For non -lighting applications, these components can be omitted simply. Active shock absorbers include components R9, R10, R11, R12, D1, Q1, C6, VR2, Q2 and R13. This circuit restricts when the two -way crystal tube (TRIAC) starts, the excitation surge flow flowing into the charge C2 opens the conduction by connecting the R13 in the first 1 millisecond of TRIAC. About 1 millisecond, Q2 opened and short -circuit R13. This keeps the power consumption of R13 at a lower level and allows a large value to be limited. The resistor R9, R10, R11, and C6 provide 1 millisecond delay after the TRIAC execution. When the transistor is the TRIAC non -conductive, Q1 discharge C6, and VR2 cuts the gate voltage of Q2 to 15V. The passive deformed circuit is composed of C11 and R18. This helps keep the input current higher than that of the two -way thyristor and maintains the current, and the input current corresponds to the valid driver in the half -cycle of each AC, the resistance increases.

7W High -power factorless LED drive

The circuit schematic in the enhanced line adjustment design instance diagram shows the LED drive equipment series based on LNK413EG connected to the LNK413EG. It is optimized to a voltage of 21 V and a constant current of 0.33 A, which is suitable for retro applications for PAR20/PAR30 lights. The design works within the universal input voltage range of 90 volt AC voltage to 265 volt voltage. With the changes in the line, the output current changes are more closely more voltage than the lighting application. The key is to notice that this is not specified for lighting. If the end user uses phase control to operate the design lighting device.

Circuit description

Input level

Fund F1 provides component fault protection at RV1 to provide a clamping clamp during the swarm of differential circuits, so that the peak drain voltage of the U1 is provided. Below 725 V rated power field effect transistor. Bridge rectifier BR1 rectifies the voltage of AC lines. Electromagnetic interference filtering is barrier to primary and secondary by L1-L3, C2, and safe-littering the rated Y-class capacitor (C7). Resistors R2 and R3 suppress L1, L2, C2 and AC line impedance. A small volume capacitor (C3) is required to provide low impedance power currents for the main switch. Limit the maximum value of C2 and C3 so that the power factor can be kept more than 0.9.

The pH primary connection switch

Provide U1 with peak line voltage information through D6 rectification and peak charge C8. ThenThe voltage monitoring pins of U1 are used to enter the voltage monitoring pins of the U1 through R4, R7, and R8 as the current. The voltage monitor pins and feedback pins current are used for internal control average output LED current. The combination values u200bu200bof R4, R7, and R8 (3.909 MW) and R11, R12 (1.402 MW) are connected to the voltage monitor pins to provide excellent line adjustment of the 265 VAC input range throughout the 90 volt voltage range. The device also uses a voltage monitor pins current to set the line to input overvoltage and underwriting protection threshold. The diode D1 and VR1 clamp the drain voltage to the safe level because the impact of the leakage. Choose the minimum number of components and the highest efficiency of the Qina pliers. The diode D5 is to prevent reverse current flow from the U1 in the AC input voltage lower than the reflection output voltage (VOR). A space -saving RM6 core is selected for this design. The RM core geometric structure helps to minimize the noise that can be heard as much as possible, but the use of flying lines to meet the safety distance requirements. The primary bias power supply from the diode D3, C6, R5, R9, and R18 comes from auxiliary winding from the transformer. The resistor R5 provides the filter peak of the leakage sensing voltage to improve the trace of the partial voltage and output voltage. It also formed an extremely pole with C6 when ~ 100Hz. The resistor R9 and R18 are used as a small load to ensure that the partial pressure collapse U1 enters the operation of short -circuit protection supply when entering the automatic restart.

Output over pressure and load disconnection protection

was provided by D8, C14, R24, VR3, C15, R23 and Q2. The output LED load is disconnected, and the output voltage will cause a rising increase in the bias winding voltage to cross C14. Once the rated voltage of VR3 is exceeded, Q2 opens the feedback pin of U1 and starts the automatic restart operation. Once automatically restarts the low occupation ratio (~ 3%) and the output prevents the output voltage from rising to a high level. Re -connect the normal operation and recovery one output load at one time. The capacitor C12 is U1 is the power pins of the internal controller.

Start C4 from the internal high voltage to ~ 6V

connect to the current source of the device leakage foot. Once the bias voltage has risen to adjust, the working power supply current is provided through R10. The diode D4 prevents U1 from charging C6 during startup, which will increase the launch delay time.

Feedback

Positive -voltage winding voltage is proportional to the output voltage (setting the winding group from the number of turns between bias and secondary). This can monitor the output voltage without secondary feed components. The resistor R15 converts the bias voltage to the current and feeds it into the U1 feedback pin. The internal engine combination feedback pins current in U1, the voltage monitoring pin current and leakage current information to provide a constant output current exceeding 2: 1 output voltage range.

Output rectification

The secondary winding of the transformer was filtered by D2 and C4 and C5. Choose the Schartki potential diode for efficiencyThe binding value with C4 and C5 is to choose to provide acceptable LED ripple current. The output capacitance value can be increased for the design when the design needs to be lower. R6 provides a small pre -tightening force to limit the output voltage under vacant conditions

Key application precautions

Power table

Data table power table (Table 1) indicates that indicating The maximum actual continuous output power is based on the following situations:

1. Efficiency 80%

2. The device's local environment temperature is 70 ° C

3. Enough heat dissipation to get heat dissipation with enough heat dissipation with Keep the equipment temperature below 100 ° C

4. Minimum output power column

120 V's reflection output voltage (VOR)

Feedback pin current 135 μA

[

[

[

[

[

[

123] The capacitance value of the bypass is 10 μF

5. The maximum output power column

65 V's reflection output voltage (VOR)

Feedback pin current 165 μA [123 ]

The capacity value of the bypass pipe is 100 μF (lNK4X3EG u003d 10 μF)

Please note that the input wire voltage above 85 volt voltage will not change the power supply capacity of the Linkswitch PH device.

Device selection

Select the value of the device size table 1 by comparing the required output power. For hot -challenging design, such as. Replace the incandescent Linkswitch PH device to use the minimum output power column with high local temperature and/or minimum heat dissipation space. This is a capacitor selected by using 10 μF bypass pins and low device current restrictions and therefore reduced the conduction loss. For open frame design or space design, please refer to the maximum output power column. From the selection of 100 μF bypass -footing capacitors, except for LNK4X3, there is only one power setting. In order to obtain the best output current tolerance tolerance to maintain the equipment temperature below 100 degrees Celsius

the maximum input capacitor

In order to achieve high power factor, in the EMI filter and decoupling rectifier AC (large -capacity capacitor) (large -capacity capacitor) Must be limited. The maximum value is that the output power of the design decreases the power as the output power decreases. For most designs, the total capacitance is limited to less than 200 nf and the volume electricity value is 100 nana. It is recommended to put the film capacitor and ceramic type, because they can hear the minimum noise with cutting -edge phase -as -the -phase light adjustment during the operation. From the value of 10 NF to the capacitance value in the EMI filter, the added value is until there is sufficient electromagnetic interference.

Reference pins resistance value selection

Linkswitch PH series contains phase lighting devices, LNK403-409 and non-light device, LNK413-419. This irreplaceable device uses 24.9 kW ± 1%reference pins high voltage resistance and universal input voltage design and 49.9 kW ± 1%. The low -line input voltage design is used to obtain the best output current tolerance (exceeding the exchange input voltage change). The dimension equipment uses 49.9kW ± 1%to achieve the widest dimming range. The voltage monitor pins resistance network selects the maximum communication range of LNK403-409 to the range of light, and uses a 4 mW resistor circuit connected to the peak of the line voltage detector. Make sure that the rated voltage of the resistor is enough for peak wire voltage. If necessary, use multiple series of connectors.

In order to obtain the best line adjustment, a series of resistor combinations are equivalent to 3.909 MW to connect to the peak of the line voltage detector. In addition, 1 MW and 402 kilowatts are connected from the voltage monitor to the source. Use 1%tolerance resistor to obtain good accuracy. Using Pixls can further improve the fine -tuning part of the electronic meter. For more information on the link switch pH, u200bu200bplease refer to the application instructions. It is necessary for primary clamping and output reflection voltage VOR to clamp at a time to limit the peak missing voltage. Zina clamp requires the least component and board space and the highest efficiency. The RCD fixture is also acceptable, but the peak leakage voltage should carefully verify that the clamp voltage changes significantly with the peak leakage during the short -circuit period of start and output short circuit.

In order to obtain the highest efficiency, the clamp voltage should be 1.5 times the selection of at least 1.5 times the output reflection voltage, VOR, because this makes the leakage peak conduction time very short. When applying Qina pliers in general input or high -voltage lines, it is recommended to use VOR with less than 135 V for absolute tolerance and temperature changes. The effective operation of the clamp circuit will ensure the effective operation of the circuit and keep the maximum drain voltage at the fidelity of the transistor below the rated value. RCD (or RCDZ) provides stricter clamp voltage tolerance than Zina.

RCD pliers are more cost -effective than Zina pliers, but more detailed designs are required to ensure that the maximum displacement voltage does not exceed the power field effect tube breakdown voltage. These VOR restricted the internal BVDSS level field effects crystal tube. A very high -frequency omnidirectional label with a 60 -volt to 100 volts is the best PFC and regulatory performance of most designs.

Candid leakage polar diode

The ultra -fast or Schartki diode connected with the drain is to prevent reverse current flowing through the device. The rated voltage must exceed the reflected output voltage, VOR. The current rated value should exceed the average current, and the peak rated value is equal to the maximum leakage current of the selected connection switch PH device. Linkswitch PH device uses peak wire voltage to adjust the output power. The capacitance value is 1 mf to 4.7 mf, it is recommended to minimize the line ripples as much as possible, and provide the highest power factor ( gt; 0.9), which can accept a smaller value, but it will cause lower the lower valuePower factor and higher line current inflammation. Phase control the lighting switch of the lighting device to control a part of the brightness AC voltage of the incandescent lamp voltage (consumer). This reduces the valid value voltage applied to the light to reduce the brightness. This is called natural lighting and Linkswitch PH LNK403-409 device configuration to dimming with natural lighting by reducing the voltage of LED current with average square wire voltage. Based on this nature, the line adjustment deliberately reduces performance to increase the working lights that increase the lighting closer to incandescent lamps. Use 49.9 KW reference pin resistance to select natural lighting mode. The cutting -edge phase -controlled lighting regulator provides the requirements for flashless output lighting. The phase lighting device based on two -way silicon -controlled cost -leading is introduced into the number of weighing times in the design.

As the power consumed by LED lighting is much lower, the current of the entire lamp is lower than the two -way thyristor current in the lighting device. This can lead to limited and/or flickering behaviors such as adverse consequences. The relatively large impedance of this LED light to the line allows the input capacitance to charge the inpu