| Part Number | STR-F6626 |
| Manufacturer | Allegro Microsystems |
| Title | Off-Line Quasi-Resonant Flayback Switching Regulators |
| Description | and Operation The voltage on the VIN terminal (pin 4) controls startup and shutdown of the Series STR-F6600 devices. Figure 1 shows a typical star... |
| Features |
The series is provided in a five-pin overmolded TO-3P style package, affording dielectric isolation without compromising thermal characteristics.
2
3
VIN
1
OVER-CURRENT & FEEDBACK
4
Dwg. PK-011-1
ABSOLUTE MAXIMUM RATINGS at TA = +25°C
Control Supply Voltage, VIN . . 35 V Drain-S...
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| File Size | 282.40KB |
| Datasheet |
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STR-F6624 : and Operation The voltage on the VIN terminal (pin 4) controls startup and shutdown of the Series STR-F6600 devices. Figure 1 shows a typical start up circuit. The VIN terminal voltage during startup is shown in figure 2. At startup, C2 is charged through the startup resistor RS. When the VIN terminal voltage reaches 16 V (typ.), the control circuit enables regulator operation. Once the regulator starts, it draws up to 30 mA from C2 causing the voltage on C2 to fall momentarily. Once the regulator output voltage is established, the drive winding D starts to charge C2 via D2. The voltage on C2 thus recovers to the nominal drive voltage (18 V). As shown in figure 3, the input current is below .
STR-F6628 : and Operation The voltage on the VIN terminal (pin 4) controls startup and shutdown of the Series STR-F6600 devices. Figure 1 shows a typical start up circuit. The VIN terminal voltage during startup is shown in figure 2. At startup, C2 is charged through the startup resistor RS. When the VIN terminal voltage reaches 16 V (typ.), the control circuit enables regulator operation. Once the regulator starts, it draws up to 30 mA from C2 causing the voltage on C2 to fall momentarily. Once the regulator output voltage is established, the drive winding D starts to charge C2 via D2. The voltage on C2 thus recovers to the nominal drive voltage (18 V). As shown in figure 3, the input current is below .