TOP266(2010) Ver la hoja de datos (PDF) - Power Integrations, Inc

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TOP266
(Rev.:2010)

Integrated Off-Line Switcher with EcoSmart® Technology for Highly Effcient Power Supplies

Power Integrations, Inc 

TOP264-271

CONTROL (C)

VC

ZC

0

INTERNAL

1

SUPPLY

EXTERNAL CURRENT

LIMIT (X)

VOLTAGE

MONITOR (V)

FREQUENCY (F)

SHUNT REGULATOR/

ERROR AMPLIFIER

+

5.8 V

4.8 V

-

SOFT START

5.8 V

INTERNAL UV

COMPARATOR

IFB

VI (LIMIT)

CURRENT

LIMIT

ADJUST

ON/OFF

÷ 16

VBG + VT

SHUTDOWN/

AUTO-RESTART

STOP LOGIC

1V

HYSTERETIC

THERMAL

SHUTDOWN

V

OVP OV/

UV

LINE

SENSE DCMAX

DCMAX

STOP SOFT

START

OSCILLATOR

WITH JITTER

66k/132k

F REDUCTION

DMAX

CLOCK

SQ

R

KPS(UPPER)

KPS(LOWER)

F REDUCTION

SOFT START

IFB

IPS(UPPER)

IPS(LOWER)

PWM

OFF

DRAIN (D)

KPS(UPPER)

KPS(LOWER)

CURRENT LIMIT

COMPARATOR

SOURCE (S)

CONTROLLED

TURN-ON

GATE DRIVER

LEADING

EDGE

BLANKING

PI-4511-012810 SOURCE (S)

Figure 2. Functional Block Diagram (E and V Package).

Pin Functional Description

DRAIN (D) Pin:

High-voltage power MOSFET DRAIN pin. The internal start-up

bias current is drawn from this pin through a switched high-

voltage current source. Internal current limit sense point for

drain current.

SOURCE (S) Pin:

Output MOSFET source connection for high voltage power return.

Primary side control circuit common and reference point.

NO CONNECTION (NC) Pin:

Internally not connected, floating potential pin.

CONTROL (C) Pin:

Error amplifier and feedback current input pin for duty cycle

control. Internal shunt regulator connection to provide internal

bias current during normal operation. It is also used as the

connection point for the supply bypass and auto-restart/

compensation capacitor.

EXTERNAL CURRENT LIMIT (X) Pin:

Input pin for external current limit adjustment remote

ON/OFF and device reset. A connection to SOURCE pin

disables all functions on this pin.

VOLTAGE MONITOR (V) Pin:

Input for OV, UV, line feed forward with DCMAX reduction, output

overvoltage protection (OVP), remote ON/OFF. A connection to

the SOURCE pin disables all functions on this pin.

E Package (eSIP-7C)

V Package (eDIP-12)

S 12

Exposed Pad S 11

(Hidden)

Internally

S 10

Connected to S 9

SOURCE Pin

S8

1V

2X

3C

4F

5 NC

S7

6D

12345 7

VXCFS D

FREQUENCY (F) Pin:

Input pin for selecting switching frequency 132 kHz if connected

to SOURCE pin and 66 kHz if connected to CONTROL pin.

Figure 3. Pin Configuration (Top View).

PI-5568-083109

www.powerint.com

3

Rev. B 03/10

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