LNK409 데이터 시트보기 (PDF) - Power Integrations, Inc

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LNK409

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

Power Integrations, Inc 

LNK403-409/413-419

BYPASS (BP)

VOLTAGE

MONITOR (V)

FEEDBACK (FB)

REFERENCE (R)

BYPASS

CAPACITOR

SELECT

SOFT-START

TIMER

1V

3-VT

ILIM

MI

STOP

LOGIC

AUTO-RESTART

COUNTER

JITTER

CLOCK

OSCILLATOR

UV/OV

LINE

SENSE

VBG

FEEDBACK

SENSE

6.4 V

IV

IFB

FBOFF

DCMAX

PFC/CC

CONTROL

REFERENCE

BLOCK

5.9 V

REGULATOR

FAULT

PRESENT

HYSTERETIC

THERMAL

SHUTDOWN

5.9 V

5.0 V

BYPASS PIN

UNDERVOLTAGE

Comparator

FBOFF

DCMAX

OCP

Gate

Driver

SenseFet

LEB

CURRENT LIMIT

COMPARATOR

ILIM

MI

VSENSE

IS

VBG

DRAIN (D)

PI-5431-102610

SOURCE (S)

Figure 3. Functional Block Diagram.

Pin Functional Description

DRAIN (D) Pin:

This pin is the power FET drain connection. It also provides

internal operating current for both start-up and steady-state

operation.

VOLTAGE MONITOR (V) Pin:

This pin interfaces with an external input line peak detector,

consisting of a rectifier, filter capacitor and resistors. The

applied current is used to control stop logic for line under-

voltage (UV), overvoltage (OV), provide feed-forward to control

the output current and the remote ON/OFF function.

SOURCE (S) Pin:

This pin is the power FET source connection. It is also the

ground reference for the BYPASS, FEEDBACK, REFERENCE and

VOLTAGE MONITOR pins.

BYPASS (BP) Pin:

This is the connection point for an external bypass capacitor for

the internally generated 5.9 V supply. This pin also provides

output power selection through choice of the BYPASS pin

capacitor value.

FEEDBACK (FB) Pin:

The FEEDBACK pin is used for output voltage feedback. The

current into the FEEDBACK pin is directly proportional to the

output voltage. The FEEDBACK pin also includes circuitry to

protect against open load and overload output conditions.

REFERENCE (R) Pin:

This pin is connected to an external precision resistor and is

used to configure for dimming (LNK403-409) and non-TRIAC

dimming (LNK413-419) modes of operation.

E Package (eSIP-7C)

(Top View)

Exposed Pad

(Backside) Internally

Connected to

SOURCE Pin

L Package (eSIP-7F)

Exposed Pad

(backside) Internally

Connected to

SOURCE Pin (see

eSIP-7C Package

Drawing)

7D

5S

4 BP

3 FB

2V

1R

135

Lead

from

Bend Outward

Drawing

R FB S

24

V BP

(Refer to eSIP-7F Package

Outline Drawing)

7

D

PI-5432-082411

Figure 4. Pin Configuration.

2

Rev. D 08/11

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