Datasheet FL7740 (ON Semiconductor) - 3
| Manufacturer | ON Semiconductor |
| Description | PWM Controller, Constant Voltage, Primary Side Regulation for Power Factor Correction |
| Pages / Page | 15 / 3 — FL7740. FUNCTION DESCRIPTION. Pin No. Pin Name. Function. Description. … |
| File Format / Size | PDF / 422 Kb |
| Document Language | English |
FL7740. FUNCTION DESCRIPTION. Pin No. Pin Name. Function. Description. www.onsemi.com
Model Line for this Datasheet
Text Version of Document
FL7740 FUNCTION DESCRIPTION Pin No. Pin Name Function Description
1 VDD IC Supply IC operating current and MOSFET driving current are supplied using this pin. 2 GND Ground Controller ground pin. 3 GATE PWM Driver This pin uses the internal totem−pole output driver to drive the power MOSFET. Output 4 CS Current Sense Connected to a current sense resistor to detect the MOSFET current for pulse− by− pulse current limit. 5 VS Voltage Sense This pin is connected to the auxiliary winding of the transformer via a resistor divider to detect the output voltage. 6 PF Power Factor This pin is connected to a resistor to optimize power factor. 7 BIAS Internal Circuit Bypass pin for the internal supply, which powers all control circuitry on the IC. BIAS 8 COMV Loop This pin is connected to a capacitor between COMV and GND for compensation. Compensation 9 NC No Connection 10 HV High Voltage This pin is connected to the rectified input voltage via a resistor for fast startup.
www.onsemi.com 3
1 VDD IC Supply IC operating current and MOSFET driving current are supplied using this pin. 2 GND Ground Controller ground pin. 3 GATE PWM Driver This pin uses the internal totem−pole output driver to drive the power MOSFET. Output 4 CS Current Sense Connected to a current sense resistor to detect the MOSFET current for pulse− by− pulse current limit. 5 VS Voltage Sense This pin is connected to the auxiliary winding of the transformer via a resistor divider to detect the output voltage. 6 PF Power Factor This pin is connected to a resistor to optimize power factor. 7 BIAS Internal Circuit Bypass pin for the internal supply, which powers all control circuitry on the IC. BIAS 8 COMV Loop This pin is connected to a capacitor between COMV and GND for compensation. Compensation 9 NC No Connection 10 HV High Voltage This pin is connected to the rectified input voltage via a resistor for fast startup.
www.onsemi.com 3
