LNK403-409/413-419
™
LinkSwitch-PH LED Driver IC Family
Single-Stage PFC, Primary-Side Constant Current Control
and TRIAC Dimming/Non-Dimming Options
Product Highlights
Dramatically Simplifies Off-line LED Drivers
•ꢀ Single-stage combination of power factor correction and
accurate constant-current (CC) output
•ꢀ Enables very long lifetime designs (no electrolytic capacitors)
•ꢀ Eliminates optocoupler and all secondary current control
circuitry
R
V
AC
IN
LinkSwitch-PH
CONTROL
D
S
V
•ꢀ Eliminates control loop compensation circuitry
•ꢀ Simple primary-side PWM dimming interface
•ꢀ Universal input voltage range
BP
R
FB
•ꢀ LNK403-409 optimized for flicker-free TRIAC dimming
EcoSmart™ – Energy Efficient
PI-6543-082211
•ꢀ Single-stage PFC combined with output CC control
•ꢀ Greatly increases efficiency, >90% achievable
•ꢀ Reduces component count
Figure 1. Typical Application Schematic.
•ꢀ No current sense resistors
•ꢀ Low standby power remote ON/OFF feature
(<50 mW at 230 VAC)
Output Power Table1,2
RV = 2 MW
RV = 4 MW
85-308 VAC
85-132 VAC
Product5
Accurate and Consistent Performance
•ꢀ Compensates for transformer inductance variations
•ꢀ Compensates for line input voltage variation
Minimum Maximum Minimum
Maximum
Output
Output
Output
Output
Power3
Power4
Power3
Power4
•ꢀ Frequency jittering greatly reduces EMI filter size and cost
LNK403/413E/L
LNK404/414E/L
LNK405/415E/L
LNK406/416E/L
LNK407/417E/L
LNK408/418E/L
LNK409/419E/L
2.5 W
2.5 W
3.8 W
4.5 W
5.5 W
6.8 W
8.0 W
4.5 W
5.5 W
7.0 W
8.0 W
10 W
6.5 W
6.5 W
8.5 W
10 W
12 W
16 W
18 W
12 W
15 W
18 W
22 W
25 W
35 W
50 W
Advanced Protection and Safety Features
•ꢀ Auto-restart for short-circuit protection
•ꢀ Open circuit fault detection mode
•ꢀ Automatic thermal shutdown restart with hysteresis
•ꢀ Meets high voltage creepage requirement between DRAIN and
all other signal pins both on PCB and at package
13.5 W
20 W
Green Package
•ꢀ Halogen free and ROHS compliant package
Table 1. Output Power Table.
Notes:
1. Continuous power in an open frame with adequate heat sinking at device local
ambient of 70 °C.
2. Power level calculated on typical LED string voltage with efficiency >80%.
3. Minimum output power with CBP = 10 mF.
Applications
•ꢀ Off-line LED driver
4. Maximum output power with CBP = 100 mF. LNK4x3EG CBP = 10 mF.
5. Package: eSIP-7C, eSIP-7F.
Description
The LinkSwitch-PH dramatically simplifies implementation of LED
drivers requiring long lifetime, high efficiency, PF >0.9, and TRIAC
dimming capability (LNK403-409). The single-stage combined
power factor and constant-current controller eliminates a switching
stage and the electrolytic bulk capacitor. The advanced primary-
side control used by the LinkSwitch-PH device provides accurate
constant current control while eliminating the need for an
optocoupler and current sensing circuits.
LinkSwitch-PH incorporates a 725 V power FET, a continuous-
mode PWM controller, a high voltage switched current source for
self biasing, frequency jittering, protection circuitry including
cycle-by-cycle current limit and hysteretic thermal shutdown.
eSIP-7F (L Package)
eSIP-7C (E Package)
Figure 2. Package Options.
www.powerint.com
August 2011
POWERINT [ Power Integrations ]
