SC1933C datasheet(2/28 Pages) POWERINT

Nome de Peças	SC1933C

Descrição Electrónicos	Off-Line CV/CC QR Flyback Switcher IC with Integrated Primary Switch, Synchronous Rectification and FluxLink Feedback

PDF	28 Pages

Scroll/Zoom	100%

Fabricante Electrônico	POWERINT [Power Integrations, Inc.]

Página de início	http://www.powerint.com

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2 / 28 page

Rev. C 11/18

SC1933C/SC1936C

www.power.com

Figure 3. Primary Controller Block Diagram.

Figure 4. Secondary Controller Block Diagram.

PI-8045a-091217

DETECTOR

ENABLE

FORWARD

(FWD)

FEEDBACK

(FB)

SECONDARY

BYPASS

(BPS)

SECONDARY

GROUND

(GND)

ISENSE

(IS)

Primary

Receiver

SYNCRONOUS RECTIFIER DRIVE

(SR)

CABLE DROP

COMPENSATION/

FEEDBACK

COMPENSATION

FEEDBACK

DRIVER

INH

TsMAX

INH

tOFF(MIN)

tSECINH(MAX)

tSS(RAMP)

4.4 V

3.9 V

SR CONTROL

INH

DCM

VREF

IS THRESHOLD

VPK

FORWARD

BPSUV

OUTPUT VOLTAGE

(VOUT)

OSCILLATOR/

TIMER

REGULATOR

4.4 V

SECONDARY

LATCH

CONSTANT

POWER

HANDSHAKE/

LATCH-OFF

THRESHOLD

CONTROL

VOUT

PI-8044e-051618

THERMAL

SHUTDOWN

OSCILLATOR/

TIMERS

OV/UV

LATCH-OFF

BPP/UV

VILIM

RESET

PRIM/SEC

SecPulse

PRIM/SEC

UV/OV

BPP/UV

ENABLE

FAULT

PRIM-CLK

GATE

BPP

DRIVER

JITTER

tON(MAX)

ILIM

BPP/UV

GATE

DRAIN

(D)

SOURCE

(S)

UNDER/OVER

INPUT VOLTAGE (V)

PRIMARY BYPASS

(BPP)

tOFF(BLOCK)

SenseFET

Power

Switch

tON(MAX)

tOFF(BLOCK)

GATE

VILIM

LATCH-OFF

GATE

PRIMARY OVP

LATCH

RECEIVER

CONTROLLER

PRIMARY

BYPASS PIN

UNDERVOLTAGE

VSHUNT

VBP+

LINE

INTERFACE

AUTO-RESTART

COUNTER

PRIMARY BYPASS

REGULATOR

PRIMARY

BYPASS PIN

CAPACITOR

SELECT AND

CURRENT

LIMIT

LEB

SecREQ

PRIM-CLK

SEC-

LATCH

From

Secondary

Controller

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