TOP200-14 데이터 시트보기 (PDF) - Power Integrations, Inc

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TOP200-14

TOPSwitch® Family Three-terminal Off-line PWM Switch

Power Integrations, Inc 

TOP200-4/14

CONTROL

VC

ZC

SHUNT REGULATOR/

ERROR AMPLIFIER

5.7 V

5.7 V

4.7 V

0

1

SHUTDOWN/

AUTO-RESTART

+

-

POWER-UP

RESET

EXTERNALLY

TRIGGERED

SHUTDOWN

IFB

THERMAL

SHUTDOWN

INTERNAL

SUPPLY

÷8

R

Q

S

Q

OSCILLATOR

DMAX

CLOCK

SAW

-

+

PWM

COMPARATOR

S

Q

R

Q

RE

Figure 2. Functional Block Diagram.

DRAIN

VILIMIT

CONTROLLED

TURN-ON

GATE

DRIVER

LEADING

EDGE

BLANKING

MINIMUM

ON-TIME

DELAY

SOURCE

PI-1746-011796

Pin Functional Description

DRAIN Pin:

Output MOSFET drain connection. Provides internal bias

current during start-up operation via an internal switched high-

voltage current source. Internal current sense point.

CONTROL Pin:

Error amplifier and feedback current input pin for duty cycle

control. Internal shunt regulator connection to provide internal

bias current during normal operation. Trigger input for latching

shutdown. It is also used as the supply bypass and auto-restart/

compensation capacitor connection point.

SOURCE Pin:

Output MOSFET source connection. Primary-side circuit

common, power return, and reference point.

DRAIN

SOURCE (TAB)

CONTROL

TO-220/3 (YO3A)

Figure 3. Pin Configuration.

PI-1065A-110194

2D

7/96

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