AS3636 datasheet(33/42 Pages) AMSCO

33 / 42 page

www.austriamicrosystems.com

Revision 0.7

33 - 42

with additional features

with photosensor

AS3636

Preliminary Datasheet, Confidential - D e ta i l e d D e s c r i p t i o n

5:3

switch_current_selection

_max

NVM

Maximum Peak current limit measured on pin SW_F if

automatic peak current regulation is performed

000

No peak current regulation done - default

001

450mA

010

525mA

011

600mA

100

675mA

101

750mA

110

825mA

111

900mA

switch_current_boost

NVM

Double value for switch_current_selection

0I(SW_F) =switch_current_selection

1I(SW_F) = 2 * switch_current_selection

ILP

NVM

R/W

Indicator LED present;

applies when indicator is switched on (IND=1)

use VLED output with AF_LED_current and

AF_LED_PWM duty cycle

use IND output with IND_LED_current;

ILF (indicator LED fault) detection is enabled

Table 23. Password Register

Addr: 13h

Password Register

EEPROM writing password lock register

Bit

Bit Name

Default Access

Description

7:0

Password_register

00h

R/W

Un-lock register for EEPROM writing - see EEPROM

Writing Cycle on page 13

138d

Read: EEPROM writing pending

Write: Unlock EEPROM writing for next I

command

0...137d,

139d...255d

EEPROM writing locked

Table 24. Photosensor Register

Addr: 18h

Photosensor Register

External Photosensor control -

see Photosensor Detection circuit on page 16

Bit

Bit Name

Default Access

Description

6:0

vsens_off_voltage

00h

R/W

Adjust photosensor off - voltage

0VSENS_OFF = 1.1V

...

127d

VSENS_OFF = 1.7V

Table 22. LED Configuration Register (Continued)

Addr: 12h

LED Configuration Register

Set maxim AF LED current and configure indicator type

Bit

Bit Name

Default Access

Description

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