LNK353 Ver la hoja de datos (PDF) - Power Integrations, Inc

Número de pieza

componentes Descripción

Fabricante

LNK353

Enhanced, Energy Efficient, Low Power Off-Line Switcher IC®

Power Integrations, Inc 

LNK353/354

BYPASS

(BP)

FAULT

PRESENT

AUTO-

RESTART

COUNTER

CLOCK

RESET

6.3 V

FEEDBACK

(FB)

1.65 V -VT

JITTER

CLOCK

DCMAX

OSCILLATOR

Figure 2. Functional Block Diagram.

REGULATOR

5.8 V

DRAIN

(D)

5.8 V

4.85 V

BYPASS PIN

UNDER-VOLTAGE

+

-

CURRENT LIMIT

COMPARATOR

VILIMIT

THERMAL

SHUTDOWN

SQ

RQ

LEADING

EDGE

BLANKING

SOURCE

(S)

PI-2367-021105

Pin Functional Description

DRAIN (D) Pin:

Power MOSFET drain connection. Provides internal operating

current for both start-up and steady-state operation.

BYPASS (BP) Pin:

Connection point for a 0.1 µF external bypass capacitor for the

internally generated 5.8 V supply.

FEEDBACK (FB) Pin:

During normal operation, switching of the power MOSFET is

controlled by this pin. MOSFET switching is terminated when

a current greater than 49 µA is delivered into this pin.

SOURCE (S) Pin:

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

ground reference for the BYPASS and FEEDBACK pins.

P Package (DIP-8B)

G Package (SMD-8B)

S1

S2

BP 3

FB 4

8S

7S

5D

Figure 3. Pin Configuration.

PI-3491-111903

2

F

2/05

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