LinkSwitch-PH

Single-stage PFC with Primary-Side CC, TRIAC-dimmable LED Driver IC

Data Sheets

LinkSwitch-PH Data Sheet

LED Driver IC with TRIAC Dimming, Single-Stage PFC and Primary-Side Constant Current Control (1.48 MB)

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

Applications

Power Table

Output Power Table^{1, 2}
Product⁵	R_V = 2 MΩ		R_V = 4 MΩ
	85-132 VAC		85-308 VAC
	Min. Output Power³	Max. Output Power⁴	Min. Output Power³	Max. Output Power⁴
LNK403/413E/L	2.5 W	4.5 W	6.5 W	12 W
LNK404/414E/L	2.5 W	5.5 W	6.5 W	15 W
LNK405/415E/L	3.8 W	7.0 W	8.5 W	18 W
LNK406/416E/L	4.5 W	8.0 W	10 W	22 W
LNK407/417E/L	5.5 W	10.0 W	12 W	25 W
LNK408/418E/L	6.8 W	13.5 W	16 W	35 W
LNK409/419E/L	8.0 W	20 W	18 W	50 W
LNK410/420E/L	18 W	31 W	40 W	78 W

Notes:

Continuous power in an open frame with adequate heat sinking at device local ambient of 70 °C.
Power level calculated on typical LED string voltage with efficiency > 80%.
Minimum output power with C_BP = 10 µF.
Maximum output power with C_BP = 100 µF. LNK4x3EG C_BP = 10 µF.
Package: E: eSIP-7C, L: eSIP-7F.