AS3630 datasheet(11/72 Pages) AMSCO

11 / 72 page

8A Supercap Flash Driver

AS3630 – 11

Averaging

ADC internal

averaging filter

Number of conversion per

measurement (averaged);

measurements can be started

immediately, at begin of flash and

end of flash - see ADC_convert

Protection and Fault Detection Functions

VVOUTMAX

VDCDC

overvoltage

protection

DCDC Converter Overvoltage

Protection

9.3

10.0

ILDCDC1

Current Limit for

coil LDCDC1 (Pin

SW1) measured at

75% PWM duty

cycle3

Set by coil1_peak

and

coil1_txmask_curr

_red during

TXMask

Range

500

3500

Accuracy, ΔI

-10

+10

ILDCDC2

Current Limit for

coil LDCDC2 (Pin

SW1) measured at

75% PWM duty

cycle3

Set by coil2_peak

Range

1000

6000

Accuracy, ΔI

-10

+10

VLEDSHORT

Flash LED short

circuit detection

voltage

Voltage measured on pin LED_OUT

monitored once the LED_OUT current

is at or above a minimum current -

“Short/Open LED Protection -

fault_led” on page 35

1.45

TOVTEMP

Overtemperature

Protection

Junction temperature

144

ºC

TOVTEMP

HYST

Overtemperature

Hysteresis

5ºC

tFLASHTIMEO

Flash Timeout

Timer

Set by

flash_timeout

Range

760

Accuracy, Δt

-10%

-2ms

+10%

+2ms

VUVLO

Undervoltage

Lockout

Falling VVIN

2.3

2.4

2.5

Rising VVIN

VUVLO

+0.05

VUVLO

+0.1

VUVLO

+0.15

Symbol

Parameter

Conditions

Min

Typ

Max

Units

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