KP107XQSPA

Non-isolated QR Buck LED Power Switch with External OTP

KP107XQSPA is a highly integrated power switch with Quasi-Resonant Buck (QR-Buck) constant current (CC) control for LED lighting applications without auxiliary winding.

KP107XQSPA combines a 500V power MOSFET and high voltage startup/IC supply circuit in one chip which reduced system design cost. The IC also adopts high accuracy current sensing control method which maintains accurate output current and good line/load regulation. At the same time, OTP protection point can be adjusted by external resistance in different grades.

KP107XQSPA integrates functions and protections of Current Limit and Leading-Edge Blanking, Under Voltage Lockout (UVLO), Cycle-by-cycle Current Limiting (OCP), Thermal Fold back (OTP), LED Short Protection, etc.

Features

•  High OTP Accuracy ±3°C

•  Adjustable OTP Function by External Resistor

•  Integrated with 500V MOSFET

•  Integrated HV VDD Power Supply Circuit

•  No VDD Cap Design

•  ±5% CC Regulation

•  Quasi-Resonant for High Efficiency

•  Very Low HVDD Operation Current

•  Built-in AC Line CC Compensation

•  No Strobe During OTP

•  Build in Protections:

•  Cycle-by-Cycle Current Limiting

•  Leading Edge Blanking (LEB)

•  LED Short Protection

•  On-Chip Thermal Fold-back (OTP)

•  Available with SOP-7 and DIP-7 Package

Applications

•  LED Lighting