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ADP3500AST データシート(PDF) 14 Page - List of Unclassifed Manufacturers

部品番号 ADP3500AST
部品情報  CDMA Power Management System
PDF  29 Pages
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メーカー  ETC [List of Unclassifed Manufacturers]
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ADP3500AST データシート(HTML) 14 Page - List of Unclassifed Manufacturers

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ADP3500
REV.PrP 2/6/02
- 14 -
1.2.2.
Flow Chart
N
Y
Battery charger start
V
ADAPTER>VBAT
?
Set Charger Detect flag
Pre-charge 5mA
VBAT>DDLO
?
BATID=0
?
BATID=0: Battery connected
BATID=1: Battery disconnected
Determined by external
sense resistor
Set Low Current Charge
I
ADAPTER=250mA
(50mV on Rsense)
Pre-charge: OFF
Current Loop Disabled
Voltage Loop Regulates
VBAT to 4.0V
Pre-charge: OFF
Voltage Detector
VLDO6>2.5V
AND
VLDO1>2.7V
?
LDO1,1b, 2, 2b, 3,6,6b
Voltage Detector
all enabled
LDO3b: ON
DDLO comparator will
operate if VBAT>2V.
Even if VBAT<2V, pre-
charge is continuously
applying 5mA.
RESETIN- should be
asserted until baseband
chip active.
Then, CHEN=1 as default.
Figure 6. Charger flow chart A
PRELIMINARY TECHNICAL DATA



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