A8732 데이터 시트보기 (PDF) - Allegro MicroSystems

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A8732

Ultra Small Mobile Phone Xenon Photoflash Capacitor Charger with IGBT Driver

Allegro MicroSystems 

A8732

Ultra Small Mobile Phone Xenon Photoflash

Capacitor Charger with IGBT Driver

Output Capacitor Charging at Various Battery Voltages

Test conditions: VIN = 3.0 V, ILIM3 (1.36 A), COUT = 100 μF / 330 V UCC, transformer = T-16-024A (LPRIMARY =12.8 μH, N = 10.25), at room temperature

Oscilloscope settings: Ch1 = ¯D¯¯O¯¯N¯¯E¯ (5 V / div), Ch2 = Battery Voltage (1 V / div), Ch3 = Output Voltage (50 V / div), Ch4 = Input Current (100 mA V / div),

Time scale = 1 sec / div

VOUT

VBAT = 3.0 V

C2,C3,C4

C1

VBAT = 3.7 V

C2,C3,C4

C1

VBAT = 4.2 V

C2,C3,C4

C1

VBAT = 5.0 V

C2,C3,C4

C1

VBAT

IIN

VDONE

VOUT

VBAT

IIN

VDONE

VOUT

VBAT

IIN

VDONE

VOUT

VBAT

IIN

VDONE

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Allegro MicroSystems, Inc.

12

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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