LTC1729 データシートの表示（PDF） - Linear Technology
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LTC1729 Datasheet PDF : 16 Pages
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TYPICAL APPLICATIO S
LTC1729 Series
4A, 2-Cell Lithium-Ion Battery Charger
DBODY
TO
SYSTEM
LOAD
VIN
(FROM
ADAPTER)
R5
3k
R6
5.1k
M3
Si4435
RS4
0.025Ω
R7 C1
500Ω 1µF
C6†
0.1µF
+ CIN*
47µF
35V
R1
1k
C7
0.68µF
VCC BOOST BOOSTC
GBIAS
CLN
CLP
INFET
UV
SYNC
SHDN
FLAG
CAP
TGATE
SW
BGATE
LT1505 VC
PROG
3 CELL
VFB
COMP1
4.2V
4.1V
AGND
PGND
BAT2 BAT SENSE SPIN
C4
0.1µF
D3
MMSD4148
C3
2.2µF
D2
MMSD4148
5Ω
M1
Si4412
M2
Si4412
RPROG
4.93k
1%
R4
3k
C5
0.33µF
D4
MBRS140
R3
300Ω
CPROG
1µF
C2
0.68µF
L1**
15µH
RS1
0.025Ω
+
COUT***
22µF
×2 +
8.4V
RS2
200Ω
1%
RS3
200Ω
1%
R8
100Ω
LTC1729-8.4
OVP
VCC
C8
0.1µF
BAT
SENSE
VC
STATUS
GND
NTC
* SANYO OS-CON
** SUMIDA CDRH127-150
*** AVX TPSD226L025R0200
† C6 NOT NEEDED IF FLAG NOT USED
†† LUMEX SML-LX0805GW-TR
RPULL-UP
10k
C9
0.1µF
R9
1.4k
D5††
10k NTC THERMISTOR, NTHS1206N02 VISHAY/DALE
NOTE: EITHER A THERMISTOR OR 10k RESISTOR MUST BE PRESENT
OPTION: TIE RESISTOR TO STATUS FOR
CHARGE TERMINATION AT
LOW CHARGING CURRENT
1729 TA02
13
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