A8732 Ver la hoja de datos (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

Charging Waveforms

Output Capacitor Charging at Various Peak Current Limits

Test conditions: VIN = 3.0 V, VBAT = 3.7 V, 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 = Output Voltage (50 V / div), Ch3 = Input Current (100 mA / div), Time scale = 1 sec / div

VOUT

ILIM1 (1.5 A)

C2,C3

C1

IIN

VDONE

VOUT

ILIM5 (1.22 A)

C2,C3

C1

IIN

VDONE

VOUT

ILIM9 (0.93 A)

C2,C3

C1

IIN

VDONE

VOUT

ILIM11 (0.79 A)

IIN

C2,C3

C1

VDONE

t

Allegro MicroSystems, Inc.

11

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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