LED照明控制器 XC9401设计指南（3/9）
3. Block Diagram and Pin Functions
Fig.5 XC9401 A type block diagram
Fig.6 XC9401 B type block diagram
Diodes inside the circuit are an ESD protection diode and a parasitic diode.
Fig.7 Pin configuration
| PIN NUMBER | PIN NAME | FUNCTION | |
|---|---|---|---|
| SOT-26 | SOT-25 | ||
| 1 | 1 | ISEN | Current sensing pin. Connect between the external power MOSFET source and the sensing resistance. Senses by converting the current in the external power MOSFET (coil current) to a voltage. |
| 2 | 5 | VDD | Power supply pin. Supplies power to the IC. Note the input operation range. |
| 3 | 3 | GATE | Output pin for drive of external power MOSFET. Connect with a resistor inserted between this pin and the gate pin of the external power MOSFET |
| 4 | 4 | EN/DIM | Enable pin / PWM dimming pin. Controls GATE output on/off. |
| 5 | 2 | GND | Ground pin. |
| 6 | - | A type:VSINE B type:NF |
A type: Reference voltage input pin for current sensing. Divide the voltage after full wave rectification with external resistors and input the result. B type: Connect to ground. (Refer to Fig. 6) |
本文介绍的产品
XC9401
LED照明离线控制器。
LED照明离线控制器。