TOP249P Ver la hoja de datos (PDF) - Power Integrations, Inc

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Fabricante

TOP249P

TOPSwitch-GX Family Extended Power, Design Flexible, EcoSmart, Integrated Off-line Switcher

Power Integrations, Inc 

CONTROL (C)

EXTERNAL

CURRENT LIMIT (X)

LINE-SENSE (L)

FREQUENCY (F)

VC

ZC

SHUNT REGULATOR/

ERROR AMPLIFIER

5.8 V

IFB

VI (LIMIT)

CURRENT

LIMIT

SOFT

ADJUST START

ON/OFF

VBG + VT

+

5.8 V

4.8 V

-

INTERNAL UV

COMPARATOR

SOFT START

0

INTERNAL

1

SUPPLY

÷8

SHUTDOWN/

AUTO-RESTART

1V

VBG

OV/UV

LINE

SENSE DCMAX

STOP LOGIC

STOP SOFT-

START

DCMAX

DMAX

CLOCK

HYSTERETIC

THERMAL

SHUTDOWN

HALF

FREQ.

SAW

OSCILLATOR WITH JITTER

-

+

PWM

COMPARATOR

LIGHT LOAD

RE

FREQUENCY

REDUCTION

S

Q

R

Figure 2a. Functional Block Diagram (Y, R or F Package).

CONTROL (C)

MULTI-

FUNCTION (M)

VC

ZC

0

INTERNAL

1

SUPPLY

SHUNT REGULATOR/

ERROR AMPLIFIER

5.8 V

IFB

VI (LIMIT)

CURRENT

LIMIT

ADJUST

SOFT

START

ON/OFF

VBG + VT

+

5.8 V

4.8 V

-

INTERNAL UV

COMPARATOR

SOFT START

÷8

SHUTDOWN/

AUTO-RESTART

STOP LOGIC

VBG

OV/UV

LINE

SENSE DCMAX

STOP SOFT-

START

DCMAX

DMAX

CLOCK

HYSTERETIC

THERMAL

SHUTDOWN

SAW

-

OSCILLATOR WITH JITTER

+

PWM

COMPARATOR

LIGHT LOAD

RE

FREQUENCY

REDUCTION

S

Q

R

Figure 2b. Functional Block Diagram (P or G Package).

TOP242-250

DRAIN (D)

CURRENT LIMIT

COMPARATOR

CONTROLLED

TURN-ON

GATE DRIVER

LEADING

EDGE

BLANKING

SOURCE (S)

PI-2639-060600

DRAIN (D)

CURRENT LIMIT

COMPARATOR

CONTROLLED

TURN-ON

GATE DRIVER

LEADING

EDGE

BLANKING

SOURCE (S)

PI-2641-061200

M

12/04

3

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