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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LTC1729 Series
TYPICAL APPLICATIO S
Wide Input Voltage Range 1A Charger
VIN
3V TO 28V C3 +
22µF
ON/OFF
R7 C6
100Ω 1µF
L1**
VIN VSW
S/S LT1512
VFB
GND
VC
IFB
R5
470Ω
C5
0.1µF
C2*
D1
4.7µF MBRS340
L2**
R4 39Ω
C4
0.33µF
R3
0.1Ω
LTC1729-8.4
OVP
VCC
+
C7
10µF
+ C1
22µF
R1
×2
29.4k
R2
12.4k
Si9925
R6
0.1Ω
RPULL-UP
47k
220k
BOOST
V+
CAP+
OSC
LTC1044
GND
LV
CAP–
VOUT
D2
1/2 BAT85S
D3
1/2 BAT85S
+
10µF
8.4V
BAT
VC
SENSE STATUS
GND
NTC
R8
R8:10k NTC THERMISTOR, NTHS1206N02 VISHAY/DALE
NOTE: EITHER A THERMISTOR OR 10k RESISTOR MUST BE PRESENT
* TOKIN CERAMIC 1E225ZY5U-C203-F
** L1, L2 ARE TWO 10µH INDUCTORS: SUMIDA CDRH6D38-100
1729 TA01
Using STATUS Pin to Indicate Charge Status
TO VCC
12V
8
VCC
2.2k
7
VC
LTC1729
10k
6
STATUS
5
NTC
PNP: MMBT3906
0.1µF
47k
2k
4.7k
2k
CONDITION
NO WALL ADAPTER
CHARGING (IBAT > C/10)
CHARGING (IBAT < C/10)
TIMER EXPIRED
AMBER
OFF
ON
OFF
OFF
GREEN
OFF
OFF
ON
ON
1729 TA03
AMBER LED
GREEN LED
12
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