AS3722 datasheet(124/199 Pages) AMSOSRAM

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ams Datasheet

Page 123

[v1-01] 2015-Sep-07

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AS3722 − Register Description

Figure 124:

SD0_control

Addr:29h

SD0_control

Bit

Bit Name

Default

Access

Bit Description

7:6

sd0_trim_gm

RW_SM

Selects gm setting of OTA

0 : fast setting

1 : slow setting

2 : medium setting

3 : very slow setting

sd0_force_pwm

Selects force pwm mode

0 : normal mode

1 : force pwm, inverted coil current possible to

keep the fixed frequency

4sd0_fast

Selects a faster regulation mode for SD0 suitable

for larger load changes.

0 : normal mode, Cout (according spec)

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

sd0_combine_phase

RW_SM

Selects phase mode (set during startup

power_stage test)

0 : normal mode

1 : combine phase 1 and 2 , 3 and 4, 5 and 6, 7

and 8

2:0

sd0_phases

RW_SM

Selects number of phases for sd0 (set during

startup power_stage test, can be changed after

that)

0 : 1 phases used

1 : 2 phases used

2 : 3 phases used

3 : 4 phases used

4 : 5 phases used

5 : 6 phases used

6 : 7 phases used

7 : 8 phases used

AS3722 Datenblatt(PDF) 124 Page - ams-OSRAM AG

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