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AS3722 데이터시트(PDF) 35 Page - ams-OSRAM AG

부품명 AS3722
상세설명  Multi-Phase DCDC Controller PMIC
PDF  199 Pages
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제조업체  AMSOSRAM [ams-OSRAM AG]
홈페이지  https://ams-osram.com/
Logo AMSOSRAM - ams-OSRAM AG

AS3722 데이터시트(HTML) 35 Page - ams-OSRAM AG

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Page 34
ams Datasheet
Document Feedback
[v1-01] 2015-Sep-07
AS3722 − Detailed Descriptions- Power Management Functions
Figure 28:
SD0 DC/DC Buck Controller 32A Block Diagram
SD0 DC/DC Buck Controller: Shows basic connection of the SD0 controller to four external power stages
(AS3729B) for 32A output current.
Mode Settings
Low Ripple, Low Noise Operation
Bit settings: sdX_low_noise=1
In this mode there is no minimum coil current necessary before
switching off the PMOS. As long as the load current is superior
to the ripple current the device operates in continuous mode.
When the load current gets lower, the discontinuous mode is
triggered. As result, the auto-zero comparator stops the NMOS
conduction to avoid load discharger and the duty cycle is
reduced down to tmin_on to keep the regulation loop stable.
This results in a very low ripple and noise, but decreased
efficiency, at light loads, especially at low input to output
voltage differences.
FB_SDx
Vout (0.4-1.5V@32A)
DVM, 10mV steps
SD
controller
TEMP1_SDx
CTRL1_SDx
CTRL2_SDx
FB_SDx
TEMP2_SDx
CTRL3_SDx
CTRL4_SDx
TEMP3_SDx
CTRL5_SDx
CTRL6_SDx
TEMP4_SDx
CTRL7_SDx
CTRL8_SDx
TEMP
CTRL1
CTRL2
LX2
LX1
0.47uH
0.47uH
47uF
AS3729B
VSUP
10uF
PVSS
47uF
VSUP
10uF
TEMP
CTRL1
CTRL2
LX2
LX1
0.47uH
0.47uH
47uF
AS3729B
VSUP
10uF
PVSS
47uF
VSUP
10uF
TEMP
CTRL1
CTRL2
LX2
LX1
0.47uH
0.47uH
47uF
AS3729B
VSUP
10uF
PVSS
47uF
VSUP
10uF
TEMP
CTRL1
CTRL2
LX2
LX1
0.47uH
0.47uH
47uF
AS3729B
VSUP
10uF
PVSS
47uF
VSUP
10uF



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