TOP264KG(2011) Ver la hoja de datos (PDF) - Power Integrations, Inc

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TOP264KG
(Rev.:2011)

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

V

OVP OV/

UV

LINE

SENSE DCMAX

DCMAX

STOP SOFT

START

OSCILLATOR

WITH JITTER

66k/132k

F REDUCTION

DMAX

CLOCK

HYSTERETIC

THERMAL

SHUTDOWN

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

Figure 3. Functional Block Diagram.

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.

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. This pin should not be left floating.

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. This pin should

not be left floating.

FREQUENCY (F) Pin:

Input pin for selecting switching frequency 132 kHz if connected

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

pin should not be left floating.

SOURCE (S) Pin:

Output MOSFET source connection for high-voltage power return.

Primary side control circuit common and reference point.

PI-4511-012810 SOURCE (S)

NO CONNECTION (NC) Pin:

Internally not connected, floating potential pin.

E Package

(eSIP-7C)

12345 7

VXCFS D

Exposed Pad

(Hidden)

Internally

Connected to

SOURCE Pin

S 12

S 11

S 10

S9

S8

S7

Exposed Pad (On Bottom)

Internally Connected to

SOURCE Pin

V1

X2

C3

F4

D6

Figure 4. Pin Configuration (Top View).

Exposed Pad Internally

Connected to SOURCE Pin

V Package

(eDIP-12)

1V

2X

3C

4F

6D

K Package

(eSOP-12)

12 S

11 S

10 S

9S

8S

7S

PI-5568-061011

www.powerint.com

3

Rev. E 10/11

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