LNK409 View Datasheet(PDF) - Power Integrations, Inc

Part Name

Description

Manufacturer

LNK409

Single-Stage PFC, Primary-Side Constant Current Control and TRIAC Dimming/Non-Dimming Options

Power Integrations, Inc 

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

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.

RV

AC

IN

D

V LinkSwitch-PH

CONTROL

BP

S

R FB

Figure 1. Typical Application Schematic.

PI-6543-082211

Output Power Table1,2

Product 5

LNK403/413E/L

LNK404/414E/L

LNK405/415E/L

LNK406/416E/L

LNK407/417E/L

LNK408/418E/L

LNK409/419E/L

RV = 2 MW

85-132 VAC

Minimum

Output

Power 3

Maximum

Output

Power 4

2.5 W

4.5 W

2.5 W

5.5 W

3.8 W

7.0 W

4.5 W

8.0 W

5.5 W

10 W

6.8 W

13.5 W

8.0 W

20 W

RV = 4 MW

85-308 VAC

Minimum

Output

Power 3

Maximum

Output

Power 4

6.5 W

12 W

6.5 W

15 W

8.5 W

18 W

10 W

22 W

12 W

25 W

16 W

35 W

18 W

50 W

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.

4. Maximum output power with CBP = 100 mF. LNK4x3EG CBP = 10 mF.

5. Package: eSIP-7C, eSIP-7F.

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

eSIP-7C (E Package)

Figure 2. Package Options.

eSIP-7F (L Package)

August 2011

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