AS3722 datasheet(32/199 Pages) AMSOSRAM

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ams Datasheet

Page 31

[v1-01] 2015-Sep-07

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AS3722 − Detailed Descriptions- Power Management Functions

Figure 24:

SD1 DC/DC Buck Controller 8A Block Diagram

SD1 DC/DC Buck Controller: Shows basic connection of the SD1 controller to the external power stage (AS3728)

for 8A output current.

Step-Down controller SD6 can be used in a special mode using

2 phases with 2 power stages which provides up to 12Arms but

requires coils capable of supporting 6Arms each.

Figure 25:

SD6 DC/DC Buck Controller 16A Block Diagram

SD6 DC/DC Buck Controller: Shows basic connection of the SD6 controller to two external power stages

(AS3729B) for 16A output current.

controller

HVSUP

TEMP

CTRL1

5VSUP

CTRL2

BOOST1

LX 2

BOOST2

LX1

PVSS

1uH

FB_SDx

CTRL2_SDx

CTRL1_SDx

TEMP_SDx

Vout (0.6-1.5V@8A)

DVM, 10mV steps

100nF

47uF

HVSUP

10uF

1uF

optional

47uF

AS3728

TEMP

CTRL1

CTRL2

LX2

LX1

PVSS

0.47uH

FB_SDx

Vout (0.8-2.07V@16A)

DVM, 10mV steps

47uF

VSUP

10uF

47uF

AS3729B

controller

TEMP1_SDx

CTRL2_SDx

CTRL1_SDx

FB_SDx

VSUP

10uF

TEMP

CTRL1

CTRL2

LX2

LX1

PVSS

0.47uH

47uF

VSUP

10uF

47uF

AS3729B

VSUP

10uF

TEMP2_SDx

PVSS

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