AS3722 datasheet(128/199 Pages) AMSOSRAM

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ams Datasheet

Page 127

[v1-01] 2015-Sep-07

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AS3722 − Register Description

Figure 128:

SD4_control

Figure 129:

SD5_control

Addr:2dh

SD4_control

Bit

Bit Name

Default

Access

Bit Description

sd4_fast

RW_SS

Selects a faster regulation mode for SD4 suitable

for larger load changes.

0 : normal mode, Cout (according spec)

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

sd4_force_pwm

Selects force pwm mode

0 : normal mode

1 : force pwm, inverted coil current possible to keep

the fixed frequency

sd4_low_noise

Enables low noise mode of SD4. If enabled smaller

current pulses and output ripple is activated

0 : Normal mode. Minimum current pulses of about

10% the current limit are applied in skip mode

1 : Low noise mode. Only minimum on time applied

in skip mode

Addr:2eh

SD5_control

Bit

Bit Name

Default

Access

Bit Description

sd5_fast

RW_SS

Selects a faster regulation mode for SD5 suitable

for larger load changes.

0 : normal mode, Cout (according spec)

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

sd5_force_pwm

Selects force pwm mode

0 : normal mode

1 : force pwm, inverted coil current possible to keep

the fixed frequency

sd5_low_noise

Enables low noise mode of SD5. If enabled smaller

current pulses and output ripple is activated

0 : Normal mode. Minimum current pulses of about

10% the current limit are applied in skip mode

1 : Low noise mode. Only minimum on time applied

in skip mode

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