SS6781A Datasheet, PDF (2/18 Pages) Silicon Standard Corp. – Battery Charger Controller

Discharge-before-charge function is included to
eliminate memory effects of NiCd batteries without
the risk of overdischarging. Test mode is provided
for charger manufactures to dramatically reduce
production test time.
SS6781A(G)
TYPICAL APPLICATION CIRCUIT
R4
390K
C1
470P
VIN
11~15V
D1
IN4148
C2 1µF
U1
1
DC
8
BOOST
2
DE
3
CF
7
IS
6
VCC
4
GND
5
FB
SS6563
R1
1K
L1
D2 IN5819
220µH ₊
R5 120/0.5W
C4
220µF
C5
0.1µF
D3
IN4148
D4
1N5819
RS 0.3/1W
BAT1
+ _C3
R7
220µF
U3 78L05
R3
R2
270
20/5W
SW1
PB SW
R8
300K
R10
100K
+
R9
C9
4.7µF
91K
C7
0.1µF
RX
RY
C6
0.1µF
C10
47nF
+
C11
100µF
LED1
YELLOW
Q1 ^R15
680
MPS2222A
U2
1
PEAK
2
VBT
3
DIS
4
VTS
5
VCC
6
ADJ
DSW ¹⁶
ICON ¹⁵
LED2 ¹⁴
LED1 ¹³
GND ¹²
SEL1 ¹¹
R14
200K
C8
0.1µF
7
R6
8
50K
R11
SEL3
TMR
SEL2 ¹⁰
MODE ⁹
SS6781A
R13
470K
100K
VIN
+
C12
1µF
VOUT
GND
+
C13
10µF
Q2
MMBT2222A
**3~5 NiMH/NiCd cells.
Note: Charge Current=0.3/RS Ampere
Safety Timer: 80min
Battery Charge Circuit for Fluctuating Charging Current Application
R12
100K
LED2 LED3
GREEN _RED
R16
R17
680
680
1/11/2005 Rev.2.10
www.SiliconStandard.com
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