TOP252 データシートの表示（PDF） - Power Integrations, Inc

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TOP252

AC/DC Converters Off-Line Switcher IC 26W/64W PK

Power Integrations, Inc 

TOP252-262

CONTROL (C)

EXTERNAL

CURRENT

LIMIT (X)

VOLTAGE

MONITOR (V)

FREQUENCY

(F)

VC

ZC

SHUNT REGULATOR/

ERROR AMPLIFIER

5.8 V

IFB

VI (LIMIT)

CURRENT

LIMIT

ADJUST

ON/OFF

+

5.8 V

4.8 V

-

INTERNAL UV

COMPARATOR

VBG + VT

1V

STOP LOGIC

SOFT START

0

INTERNAL

1

SUPPLY

√ 16

SHUTDOWN/

AUTO-RESTART

HYSTERETIC

THERMAL

SHUTDOWN

V

OVP OV/

UV

LINE

SENSE DCMAX

STOP SOFT

START

DCMAX

OSCILLATOR

WITH JITTER

66k/132k

F REDUCTION

DMAX

CLOCK

KPS(UPPER)

KPS(LOWER)

F REDUCTION

SOFT START

IFB

IPS(UPPER)

IPS(LOWER)

PWM

OFF

SQ

R

Figure 3c. Functional Block Diagram (TOP254-258 YN Package and all eSIP Packages).

CONTROL (C)

EXTERNAL

CURRENT

LIMIT (X)

VOLTAGE

MONITOR (V)

VC

ZC

SHUNT REGULATOR/

ERROR AMPLIFIER

5.8 V

IFB

VI (LIMIT)

CURRENT

LIMIT

ADJUST

ON/OFF

+

5.8 V

4.8 V

-

INTERNAL UV

COMPARATOR

VBG + VT

1V

STOP LOGIC

SOFT START

0

INTERNAL

1

SUPPLY

√ 16

SHUTDOWN/

AUTO-RESTART

HYSTERETIC

THERMAL

SHUTDOWN

V

OVP OV/

UV

LINE

SENSE DCMAX

DCMAX

STOP SOFT

START

OSCILLATOR

WITH JITTER

DMAX

CLOCK

F REDUCTION

KPS(UPPER)

KPS(LOWER)

F REDUCTION

SOFT START

IFB

IPS(UPPER)

IPS(LOWER)

PWM

OFF

SQ

R

Figure 3d. Functional Block Diagram TOP259YN, TOP260YN, TOP261YN.

KPS(UPPER)

KPS(LOWER)

CURRENT LIMIT

COMPARATOR

SOURCE (S)

CONTROLLED

TURN-ON

GATE DRIVER

LEADING

EDGE

BLANKING

PI-4511-082907

KPS(UPPER)

KPS(LOWER)

CURRENT LIMIT

COMPARATOR

SOURCE (S)

CONTROLLED

TURN-ON

GATE DRIVER

LEADING

EDGE

BLANKING

PI-4974-122607

DRAIN (D)

SOURCE (S)

DRAIN (D)

SOURCE (S)

SIGNAL

GROUND (G)

www.powerint.com

5

Rev. H 06/13

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