Description

U2010B Designed as bipolar technology. It makes load current detection and soft startup function and reference voltage output. Feedback and overload protection with load current is the preferred application.

Features

full wave current sensor

Compensation power change

A programmable load current limit

with overload and high load output

Variable soft start

Voltage and current synchronization

Automatically trigger switch

Typical values of trigger pulse 125 mia

Internal Power supply voltage monitoring

Currently required 3mAh

Temperature compensation reference voltage

Application

Advanced motor control

General description

In the case of V (70%of the overload threshold voltage), inserted 11 and 12 connected internally, so U2010B includes voltage limit, which can be V1.2 five five. When #63735; V #63735; #63735; V #63735;, the power current is connected to the main power supply through D and R power supply. smooth.

Voltage Monitoring

As the voltage increases, the unprepared output pulse is avoided through internal voltage monitoring. In addition, all the locks in the circuit (phase control, load restriction adjustment) reset, and soft start of the capacitor short circuit. This guarantees the startup behavior of the power supply voltage or after the power supply is interrupted for a short time. The soft start is started after the power supply voltage is established. This behavior guarantees the mild start of the motor and automatically ensures the best operation time.

Phase control

The function of phase control is basically the same as the well -known integrated circuit series U211B. The phase angle of the trigger pulse is obtained by the power supply slope voltage VW that is synchronized with the setting value on the control input terminal (pin 4) on the comparative voltage detector and the control input terminal (pin 4)

The slope slope Decided by C and its charging current i. The charging current can be changed with R plugs 14. The maximum phase angle α can also be adjusted by using R (minimum current angle), as shown in Figure 4. The maximum value, minimum value

When the potential on the pin 3 reaches the setting value of the pin 4, the trigger pulse width T is from C (t 9 s/nf ) The value is determined. At the same time, using the output pulse to set the lock in the memory, as long as it is automatically triggered that it is not activated, then the pulse cannot be generated in this half cycle. The control input (relative to the foot 10) of the control input (relative to the foot 10)By the V TO -1V. When V V, the phase angle is its maximum value α, the smallest current angle. The minimum phase angle α is set to V -1V. Page Page 8 48 maximum, minimum value, 4 automatically trigger

current detection circuit to monitor the state of TRIAC after the voltage at the TRIAC gate decreases. When the voltage drops exceeds THRES to keep horizontally, it is recognized through the current flow of TRIAC.

If the related semi -waves are quenched after triggering, for example, due to the low load current before or after the current waves at zero or after the current; The automatic re -trigger circuit ensures that when necessary, it will be triggered immediately at high repetition T/T until TRIAC keeps reliable trigger.

Current synchronization

current synchronization to achieve two functions:

Monitoring current after triggering. If TRIAC goes out or does not open again, it will be automatically triggered until the trigger is successful.

Avoid sensor load triggers. In the case of inductive load operation, the current synchronizes that in the new semi -wave, as long as the current from the front half of the wave (this current flows from the opposite polarity to the actual power voltage), the pulse will not be enabled.

One feature of the integrated circuit is to achieve current synchronization. The device evaluates the pulse output voltage between the three electrode integrated circuit grids and the reference electrode. This will save a separate current input with a specified series resistance.

The voltage synchronization and the power supply voltage compensation

The voltage detector allows the reference slope to synchronize with the power supply voltage. At the same time, the input current related to the power supply is plastic and rectified in the internal flow at 15 pins. The current activation is automatically triggered and available at 5 pins. By labeling appropriately, the prescribed compensation effect can be achieved. Automatically trigger and power supply voltage compensation until the | V15–10 | increase to 8 V resistance, and RSYNC starts. Define the width and synchronization current of the zero voltage crossing pulse to define the compensation current of the power supply voltage.

Load current compensation

The circuit continuously measures the load current as the voltage drop at the resistance R. Evaluation and use of these two semi -waves will cause a rapid response to the changes in load current. Due to the voltage at the resistance R, there are differences between the input current of the needle foot 1 and the pin 2. This difference controls the internal current source, and its positive current values are available in pins 5 and 6. The output current generated by pin 5 includes the difference between the load current detection and the power supply voltage compensation (see Figure 1).

The effective control voltage at 4 pins is the final current of 5 pins and the expected value network. The increase in power supply voltage leads to an increase in the control angle α, and the increase in load current leads to a decrease in the control angle. This avoids increased speed by increasing the load and increasing the speed by increasing the power supply voltage.

Limited load current

The total output load current is in the pin6 are available.When the electromotive of the load current reaches about 70%of the threshold (V), the voltage of R is reduced to California.Article 4.35 In pin 6, it switches the high load comparator and opens the switch between the pin 11 and 12.By using LEDs between these pin (11 and 12), high load indications can be achieved.

If the potential of the pin 6 increases to the CA.6.2 V ( VT100), switch overload comparators.The result is programmable under the pin 9 (operating mode).

Application circuit

Size (mm) Packaging: DIP16

Packag]