AS3722 datasheet(129/199 Pages) AMSOSRAM

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Page 128

ams Datasheet

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[v1-01] 2015-Sep-07

AS3722 − Register Description

Figure 130:

SD6_control

Addr:2fh

SD6_control

Bit

Bit Name

Default

Access

Bit Description

7:6

sd6_trim_gm

RW_SM

Selects gm setting of OTA

0 : fast setting

1 : slow setting

2 : medium setting

3 : very slow setting

sd6_force_pwm

Selects force pwm mode

0 : normal mode

1 : force pwm, inverted coil current possible to

keep the fixed frequency

4sd6_fast

Selects a faster regulation mode for SD6 suitable

for larger load changes.

0 : normal mode, Cout (according spec)

1 : fast mode, 2 x Cout (according spec) required

sd6_combine_phas

0RW_SM

Selects phase mode (set during startup subdie

test)

0 : normal mode

1 : combine phase 1 and 2

sd6_ph2c_on

RW_SM

Selects high current mode of SD6 (doubled

current) (set during startup subdie test)

0 : normal mode (only one supdie connected)

1 : second subdie on pin TEMP2_SD6 detected

(short CTRL1 and CTRL2 of each subdie and

connect to CTRL1_SD6 and CTRL2_SD6)

sd6_low_noise

Enables low noise mode of SD6. If enabled

smaller

current pulses and output ripple is activated

0 : Normal mode. Minimum current pulses of

about 100f the current limit are applied in skip

mode

1 : Low noise mode. Only minimum on time

applied in skip mode

sd6_phases

RW_SM

Selects number of phases for SD6 (set during

startup subdie test, can be changed after that)

0 : 1 phase used

1 : 2 phases used

AS3722 Datenblatt(PDF) 129 Page - ams-OSRAM AG

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