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
•
Eliminates control loop compensation circuitry
•
Simple primary-side PWM dimming interface
•
Universal input voltage range
•
LNK403-409 optimized for flicker-free TRIAC dimming
EcoSmart
™
– Energy Efficient
•
Single-stage PFC combined with output CC control
•
Greatly increases efficiency, >90% achievable
•
Reduces component count
•
No current sense resistors
•
Low standby power remote ON/OFF feature
(<50 mW at 230 VAC)
Accurate and Consistent Performance
•
Compensates for transformer inductance variations
•
Compensates for line input voltage variation
•
Frequency jittering greatly reduces EMI filter size and cost
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
Green Package
•
Halogen free and ROHS compliant package
Applications
•
Off-line LED driver
RV
AC
IN
D
V
LinkSwitch-PH
BP
CONTROL
S
R
FB
PI-6543-082211
Figure 1.
Typical Application Schematic.
Output Power Table
1,2
R
V
= 2 MW
Product
5
85-132 VAC
Minimum Maximum
Output
Output
Power
3
Power
4
2.5 W
4.5 W
2.5 W
3.8 W
4.5 W
5.5 W
6.8 W
8.0 W
5.5 W
7.0 W
8.0 W
10 W
13.5 W
20 W
R
V
= 4 MW
85-308 VAC
Minimum
Maximum
Output
Output
Power
3
Power
4
6.5 W
12 W
6.5 W
8.5 W
10 W
12 W
16 W
18 W
15 W
18 W
22 W
25 W
35 W
50 W
LNK403/413E/L
LNK404/414E/L
LNK405/415E/L
LNK406/416E/L
LNK407/417E/L
LNK408/418E/L
LNK409/419E/L
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.
www.powerint.com
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 C
BP
= 10
mF.
4. Maximum output power with C
BP
= 100
mF.
LNK4x3EG C
BP
= 10
mF.
5. Package: eSIP-7C, eSIP-7F.
eSIP-7C (E Package)
Figure 2.
Package Options.
eSIP-7F (L Package)
August 2011
POWERINT [ POWER INTEGRATIONS, INC. ]
