Holtek Semiconductor HT7L4661
The HT7L4661 is a Buck converter controller using quasi-resonant conversion technology. It can be used for driving high-brightness LEDs with power factor correction in off-line applications. The controller is implemented by driving an external power MOSFET and measuring and regulating a constant LED current.| Part No. | HT7L4661 |
|---|---|
| Datasheet | HT7L4661 Download |
| Manufacturer |  Holtek Semiconductor |
| Description | Active PFC Non-isolation Buck LED Lighting Driver |
| Buy | Stock & Price |
APPLICATIONS
● General illumination● E26/27, T5/T8 LED Lamp
● Other LED Lighting
APPLICATIONS
GENERAL DESCRIPTION
Additional features in the device include a rapid high voltage startup function and a 5V LDO output with a 1mA drive capability for external loads. There is also a linear dimming function to adjust the LED illumination level. The device also includes multiple protection features to protect it from fault conditions. These include under-voltage lockout, over-current protection, Vcc pin over-voltage protection and a ZCD pin overvoltage protection for the output voltage. Additionally, to ensure device reliability, there is also a fully integrated thermal protection function. Application Circuits ACIN VOUT+ VOUT- 12 3 HV N.C DRV DIM 8 9 7 CS COMP REG5V 6 5 GND HT7L4661 4 VCC 10 ZCD VSS OUT VCC Controller Rev. 1.20 1 June 26, 2015 Block Diagram VCC HV REG5V ZCD CS LDO OVP1 OVP2 OTP OCP Linear Dimmimg VCC Clamping Reference & Bias UVLO Minimum Off Time ZCD Comparator HV Start-up...
