LinkSwitch-PH
Single-stage PFC with Primary-Side CC, TRIAC-dimmable LED Driver IC
Applications
Product Details
Description
The LinkSwitch-PH dramatically simplifies implementation of LED drivers requiring PF > 0.9, TRIAC dimming and high efficiency. The highly integrated controller eliminates passive circuitry required for power factor correction, optocoupler and secondary current control circuitry. LinkSwitch-PH introduces a new control technique that provides very high power factor and accurate output current control.
LinkSwitch-PH incorporates a 725 V power MOSFET, a continuous-mode PWM controller, a high voltage switched current source for self biasing, frequency jittering, cycle-by-cycle current limit and hysteretic thermal shutdown circuitry, all in a monolithic IC.
Product Highlights
Dramatically Simplifies Off-line LED Drivers
- Single stage power factor correction and accurate constant current (CC) output
- Flicker-free phase-controlled TRIAC dimming
- Eliminates optocoupler and all secondary current control circuitry
- Eliminates all control loop compensation circuitry
- Simple primary-side PWM dimming interface
Accurate and Consistent Performance
- Compensates for transformer inductance tolerances
- Compensates for line input voltage variations
- Frequency jittering greatly reduces EMI filter size and costs
Advanced Protection and Safety Features
- Auto-restart for short circuit protection
- Open circuit fault detection mode
- Automatic thermal shutdown or restart with hysteresis
- Meets high voltage creepage requirement between DRAIN and all other pins both on PCB and at package
EcoSmart® – Energy Efficient
- Low standby power remote ON/OFF feature (< 50 mW at 230 VAC)
- No current sense resistors – maximizes efficiency Green Package
- Halogen free and ROHS compliant package Applications
- Offline LED driver
