# UPSSL150 LED Driver IC

## Description
· High precision LED buck constant current driver chip
· Operates in inductor current critical continuous mode
· Suitable for non-isolated buck LED power supplies with 85Vac~265Vac input
· Integrates 500V power switch with demagnetization detection
· Simplifies peripheral devices, reducing cost & size
· High accuracy current sampling and constant current control

## Features
· Integrated 500V power MOSFET
· Integrated high-voltage power supply function
· Inductor current critical continuous mode operation
· No auxiliary winding detection/power supply needed
· Wide voltage input range
· ±5% LED output current accuracy
· LED short & open circuit protection
· Chip power supply under-voltage protection
· Over-temperature regulation

## Ordering Information
· Available in SOT-23-3, SOT-23, SOT-89, HSOP-8, and TO-92 packages
· Tape Reel and Bulk packing options

## Pin Configuration
· SOT-23/SOT-23-3: VDD(1), DRAIN(2), CS(3)
· SOT-89: VDD(1), DRAIN(2), CS(3)
· HSOP-8: VDD(1), DRAIN(2), CS(3), NC (4-7), VDD (8)
· TO-92: VDD(1), DRAIN(2), CS(3)

## Electrical Characteristics
· Input Voltage (VIN): -0.3 ~ 550V
· Supply Voltage (VDD): -0.3 ~ 8.5V
· Operating Current (ICC): 120-300 uA
· Constant Current Precision: ±5%
· Short Circuit Protection Frequency: 2-4 KHz

## Application Information
· PCB design recommendations:
- VDD bypass capacitor close to VDD pin
- RCS resistor close to CS pin
- Minimize trace length between RCS, VDD, and CS
- Increase copper area around CS pin for cooling
· Over-temperature adjustment begins at 140°C for improved reliability.