AS3630 datasheet(31/72 Pages) AMSCO

31 / 72 page

8A Supercap Flash Driver

AS3630 – 31

100b

Torch light mode

keep_sc_charged

=0 keep voltage

on Supercap as is;

keep_sc_charged

=1 charge

Supercap to

end_of_charge_v

oltage with

IKEEP_CHARGE -

Figure 21 on

page 25

led_current1

limited to 460mA

101b

PWM operation:

Use for indicator

with the main flash

LED or low current

PWM operation2

led_current3

limited to

303.9mA PWM

modulated by

led_out_pwm

(1/16...4/16 @

31.25kHz,

1/32, 3/32 @

15.625kHz)

110b

Torch operation

sync to STROBE -

see Figure 32 on

page 35

0mA

led_current1

limited to 931mA

111b

strobe_on = 0

Flash mode;

flash duration

defined by

flash_timeout

Supercap is

discharged using

DCDC2 to

LED_OUT -

Figure 22 on

page 26

mode selected

after flash: see

Figure 23 on

page 27

led_current for

flash duration

strobe_on = 1

and

strobe_type = 0

strobe_on = 1

and

strobe_type = 1

Flash mode;

flash duration

defined by STROBE

input; timeout

defined by

flash_timeout

1. If led_current_range=10 will use led_current_range=00.

2. The low current mode is a general purpose PWM mode to drive less current through the LED in average, but keep the actual pulsed current

in a range where the light output from the LED is still specified.

3. Will use led_current_range=00.

4. If txmask_torch_mode=01b then the DCDC1 peak coil current is changed depending on input TXMASK/TORCH - see section “TXMASK” on

page 28

AS3630 Configuration

Operating Mode and Currents

Condition

Mode

AS3630 Datasheet(PDF) 31 Page - ams AG

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