Explanation

Viper100A-E/ASP-E is made of VIPOWER M0 technology, which combines the most advanced PWM circuit and optimized high-voltage vertical power MOSFET (700V/3A) on the same silicon wafer.

The typical application includes offline power supply. The secondary power supply capacity is 50W under the wide range conditions and 100W under a single range or double configuration. It is compatible with first or second -level regulation. Although compared with discrete, the ingredients used are reduced by about 50%. The emergency mode operation is an additional function of the device, which provides the ability to operate in the standby mode without additional components.

Pointing instructions 3 Pingspace Instructions

Discosting (Integrated Power MOSFET Demonstration): 3.1 Discossed (Integrated Power MOSFET Leakage Leakage Leakage (Integrated Power MOSFET Leaks Extreme):

Integrated power MOSFET drain tube foot. It provides internal bias current during the startup through an integrated high -voltage current source, which is closed during the normal operation. The device can process the unrecepted current during the normal work to ensure the self -protection of voltage waves and PCB mixed inductances, and allow low -output power without buffer operations.

Source quotation:

Power MOSFET source. Public ground connection of one -sided circuit.

VDD pin (power supply): 3.3 VDD pin (power supply):

This pin provides two functions:

The low -voltage power supply corresponding to the circuit control part. If V is lower than the due diligence 8V, the start current source is activated, and the output power MOSFET is closed until the V voltage reaches 11V. At this stage, the internal current consumption is reduced, the V pins generate a current of about 2mA, and the COMP pin is short -circuited on the ground. After that, the current source is turned off, and the device attempts to start it again. Dyedon investigation and due diligence

The pin is also connected to an error amplifier in order to perform first and secondary adjustment configuration. In the case of a adjustment, the internal 13V fine -tuning reference voltage is used to keep the voltage at 13V; during the second adjustment, the voltage of 8.5V ~ 12.5V is applied through the transformer design to keep the output of the cross -guidance amplifier maintained. In a higher state. The COMP tube foot can be easily connected to the output end of the optocoupler. Note that any overvoltage caused by the regulating circuit failure is still detected by an error amplifier through the V voltage, and the voltage cannot exceed 13V. The output voltage will be slightly higher than the nominal voltage, but it is still under control. Dyepermia Dyedon Due to Dyedon

Compensation Selling

This pin provides two functions:

It is the output of error cross -guide amplifier, allowing connection compensation networks to provide providing providing compensation network Regulate the transmission function required for the circuit. Its bandwidth can be easily adjustedThe required value and the usual component value. As mentioned above, the secondary adjustment configuration is also implemented through the COMP PIN.

When the COMP voltage is lower than 0.5V, the circuit is closed, and the power occupation ratio of the power MOSFET is zero. This function can be used to turn off the converter and automatically activate by the adjustment loop (no matter how configuration), providing an emergency mode operation with the output power that can be ignored or the load is turned on.

Point Instructions

OSC pin (oscillator frequency): 3.5 OSC pin (oscillator frequency):

A R-C network must be connected on it to define the switch to define the switch frequency. Note that although R is connected to V, there will be no significant frequency changes for V from 8V to 15V. When connected to the external frequency source, it also provides synchronization capabilities. t型t型t型尽职调查尽职调查

连接图（俯视图）

电流和电压约定Pentawatt高压PENT

[ 123]

Typical circuit 4 Typical circuit

offline power supply with auxiliary power supply

Offline power supply with optocoupler feedback

Operation description 5 Operation instructions

current mode top topology:

The same current mode control method integrated in VIPER100A-E/ASP-E is the same , The current mode control method uses two control circuits -internal current control loop and external voltage control loop. When the power MOSFET output transistor is turned on, use the SenseFET technology to monitor the inductor current (the primary side of the transformer) and convert it into a voltage V proportional to the current. When V reaches V (amplifying output voltage error), the power switch is turned off. Therefore, the external voltage control loop defines the level of the peak current of the internal circuit through the power switch and the transformer. Company S Company S compensation

Because the current mode controls the inherent input voltage feedback characteristics, it ensures good opening -loop DC and dynamic line adjustment. This will improve the line adjustment, instantly correct the line changes, and improve the stability of the voltage regulation circuit.

current mode topology also ensures good restrictions in short circuits. In the first stage, the output current increased slowly with the dynamics of the adjustment circuit. Then reach the maximum limit current set inside, and finally stop because the power on the V is no longer correct. For specific applications, the maximum peak current setting can be covered by external restrictions on the voltage offset on the COMP pin. Integrated anti -huddy filter suppress the output of the PWM comparator in a short time after the integration power MOSFET is powered on. This function prevents the reverse recovery time due to primary capacitors or secondary rectifiesThe current peak caused by the current causes an abnormal or premature termination of the switching pulse. Due to due diligence

Standby mode 5.2 Standby mode

The spare operation of the spare operation under the load condition nearly opened automatically leads to an emergency mode operation allowed to perform voltage adjustment on the secondary side. The process of power P from a normal working mode to an emergency mode work is as follows: Sterbie

L is an inductance of the transformer. F is a normal switch frequency. Page Southwest

I is the minimum controllable current, which corresponds to the minimum opening time that the device can provide at normal operation. This current can be calculated as: Steby

T+T is the sum of the dissemination time of the dissection time of the faint time and the internal current sensor and comparator, which roughly represents the minimum opening time of the device. Note: PSTBY may be affected by the efficiency of the converter when the load is low, and it must include the power consumed by the auxiliary voltage.

Operation description

Once the power is lower than this limit, the auxiliary secondary voltage begins to increase, and the adjustment level of more than 13V is forced to force the output voltage of the cross -guidance amplifier in a low state (v lt; v) Essence This situation leads to the shutdown mode, and the power switch is kept in a disconnected state, resulting in the loss cycle and zero occupation ratio. Once V returns to the adjustment level and reaches the V threshold, the device runs again. The above cycle is repeatedly repeated, providing an emergency mode, and its effective occupation ratio is much lower than the minimum occupation ratio at normal runtime. The equivalent switching frequency is also lower than the normal switching frequency, which reduces the loss of the input main power cord. This operation mode allows Viper100A-E/ASP-E to meet the new German Blue Angel " standard during the standby mode. The total power consumption of the system is less than 1W. The output voltage is kept at a normal level and a low -frequency ripple corresponding to the emergency mode. The amplitude of this ripple is very small