STR-G6622 Просмотр технического описания (PDF) - Allegro MicroSystems

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STR-G6622

OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR

Allegro MicroSystems 

STR-G6651

OFF-LINE

QUASI-RESONANT FLYBACK

SWITCHING REGULATOR

ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 18 V, VDD = 10 V, VS = 0, voltage mea-

surements are referenced to ground terminal (unless otherwise specified).

Limits

Characteristic

Symbol Test Conditions

Min. Typ. Max. Units

On-State Voltage

Under-Voltage Lockout

Over-Voltage Threshold

Drain-Source Breakdown Voltage

Drain Leakage Current

On-State Resistance

Maximum OFF Time

Minimum Pulse Duration for Input of

Quasi-Resonant Signals

Minimum OFF Time

Feedback Threshold Voltage

VINT

VINQ

VOVP(th)

V(BR)DSS

IDSS

rDS(on)

toff

tw(th)

toff

VFDBK

Turn-on, increasing VIN

14.4 16 17.6 V

Turn-off, decreasing VIN

9.0 10 11 V

Turn-off, increasing VIN

20.5 22.5 24.5 V

ID = 300 µA

650 –

–

V

VDS = 650 V

–

– 300 µA

VS = 10 V, ID = 0.9 A, TJ = +25°C –

– 3.95 Ω

Drain waveform high

45

–

55 µs

Drain waveform high1

Drain waveform high1

Drain waveform low to high1

Oscillation synchronized2

–

–

1.0 µs

–

–

1.5 µs

0.68 0.73 0.78 V

1.3 1.45 1.6 V

Over-Current Protection/Feedback

Sink Current

Latch Holding Current

Latch Release Voltage

Switching Time

Supply Current

Insulation RMS Voltage

IOCP/FB

IIN(OVP)

VIN

tf

IIN(ON)

IIN(OFF)

VWM(RMS)

VOCP/FB = 1.0 V

1.2 1.35 1.5 mA

VIN reduced from 24.5 V to 8.5 V

–

– 400 mA

IIN ≤ 20 µA, VIN reduced from 24.5 V 6.6

–

8.4 V

VDD = 200 V, ID = 0.9 A

–

– 250 ns

Operating3

–

–

30 mA

Increasing VIN prior to oscillation

–

–

All terminals simultaneous refer- 2000 –

ence metal plate against backside

100 µA

–

V

Thermal Shutdown

Thermal Resistance

TJ

RθJM

140 –

– °C

Output junction-to-mounting frame –

– 1.63 °C/W

Notes: Typical Data is for design information only.

1. Feedback is square wave, VIM = 2.2 V, th = 1 µs, tl = 35 µs

2. For quasi-resonant operation, the input signal must be longer than tw(th) and greater than VFDBK

3. Feedback is square wave, VIM = 2.2 V, th = 4 µs, tl = 1 µs

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