AS3630 datasheet(32/72 Pages) AMSCO

32 / 72 page

AS3630 – 32

8A Supercap Flash Driver

Current Ranges

Depending on operating mode (mode_setting (see page 51)) the

current settings according to Figure 26 are possible9 :

Figure AS3630 – 26:

LED Current Selections

SOFTSTART / Soft Ramp Down

During startup and ramp down the LED current is smoothly

ramped up and ramped down. Additionally the DCDC converter

on VIN has a startup mechanism to minimize or eliminate

battery input current overshoots.

Indicator Blinking Function

Setting ind_on=1 enabled the indicator current source on pin

IND_OUT. If ind_blink_delay=00 or ind_blink_on_time= 00, the

current source is constantly enabled with a current defined by

ind_current. All other conditions enable the indicator blinking

feature as shown in Figure 27 controlled by ind_blink_on_time,

ind_rampup_smooth, ind_rampdown_smooth, ind_blink_delay

and ind_current. Smooth current rampup and rampdown is

done using PWM modulation.

9. The LED current is limited by hardware to protect the LEDs under any condition.

led_current_range

External Torch

Mode or Torch

Mode

PWM Operation

Flash

Operation

Torch operation

sync to STROBE

(10-2500mA range)

Ok, but limited to

460mA

Ok, but limited to

303.9mA

Ok, but limited to

931mA

(10-250mA range)

Will use 00 range

(10-303.9mA)

(2500-3000mA range)

Will use 00 range

(10mA - 460mA)

Will use 00 range

(10-303.9mA)

Will use 00 range

(10mA - 931mA)

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