A8732 Просмотр технического описания (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

ELECTRICAL CHARACTERISTICS Typical values are valid at VIN = VBAT = 3.6 V; TA = 25°C, except

guaranteed from −40°C to 85°C ambient, unless otherwise noted

Characteristics

Symbol

Test Conditions

VBAT Voltage Range

VBAT

(note 1)

VIN_DRV Voltage Range

UVLO Enable Threshold

UVLO Hysteresis

VIN

VINUV

VINUV(hys)

(note 1)

VIN rising

Shutdown (CHARGE = 0 V, TRIG = 0 V)

VIN Supply Current

VBAT Pin Supply Current

IIN

Charging complete

Charging (CHARGE = VIN, TRIG = 0 V)

Shutdown (CHARGE = 0 V, TRIG = 0 V)

IBAT

Charging done (CHARGE = VIN,

¯D¯¯O¯¯N¯¯E¯ = 0 V)

Current Limit

Charging (CHARGE = VIN, TRIG = 0 V)

Primary-Side Current Limit

ISWLIM

ISWLIM1

ISWLIM2

ISWLIM3

ISWLIM4

100% setting (note 2)

Default setting

One pulse applied to CHARGE pin

Two pulses applied to CHARGE pin

Three pulses applied to CHARGE pin

(note 3)

ISWLIM5

ISWLIM6

ISWLIM7

ISWLIM8

Four pulses applied to CHARGE pin

Five pulses applied to CHARGE pin (note 3)

Six pulses applied to CHARGE pin (note 3)

Seven pulses applied to CHARGE pin

(note 3)

Switch Current Limit (ILIM Programming Input

on CHARGE Pin)

ISWLIM9

ISWLIM10

ISWLIM11

ISWLIM12

Eight pulses applied to CHARGE pin

Nine pulses applied to CHARGE pin (note 3)

Ten pulses applied to CHARGE pin (note 3)

Eleven pulses applied to CHARGE pin

(note 3)

ISWLIM13

Twelve pulses applied to CHARGE pin

(note 3)

ISWLIM14

Thirteen pulses applied to CHARGE pin

(note 3)

ISWLIM15

Fourteen pulses applied to CHARGE pin

(note 3)

ISWLIM16

Fifteen pulses applied to CHARGE pin

(note 3)

indicates specifications

Min. Typ. Max. Unit

1.5 – 5.5 V

2.3 – 5.5 V

– 2.05 2.2 V

– 150 – mV

– 0.02 0.5 μA

–

50 100 μA

–

2

– mA

– 0.01 1

μA

–

–

5

μA

–

–

50 μA

1.35 1.5 1.65 A

– 100 –

%

–

95

–

%

–

90

–

%

–

86

–

%

–

81

–

%

–

76

–

%

–

71

–

%

–

67

–

%

–

62

–

%

–

57

–

%

–

52

–

%

–

48

–

%

–

43

–

%

–

38

–

%

–

33

–

%

–

29

–

%

Continued on the next page…

Allegro MicroSystems, Inc.

4

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

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