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SS6781A(G)

1/11/2005 Rev.2.10

TYPICAL APPLICATION CIRCUIT

PEAK

1

VBT

2

DIS

3

VTS

4

VCC

5

ADJ

6

SEL3

7

TMR

8

MODE

9

SEL2

10

SEL1

11

GND

12

LED1

13

LED2

14

ICON

15

DSW

16

U2

SS6781A

R8

300K

R9

91K

R10

100K

+

C9

4.7

µF

C7

0.1

µF

C10

47nF

R15

680

R3

270

R2

20/5W

SW1

PB SW

R12

100K

R16

680

R17

680

R14

200K

C8

µF

+

C11

100

µF

RX

R11

100K

RY

C6

0.1

µF

R13

470K

Q2

MMBT2222A

R6

50K

LED2

GREEN

LED3

RED

LED1

YELLOW

Q1

MPS2222A

+

C4

220

µF

C5

µF

+

C12

1

µF

+

C13

10

µF

R5 120/0.5W

R1

1K

BAT1

R7

VIN

11~15V

L1

220

µH

C2

1

µF

C1

470P

RS

0.3/1W

1

2

3

GND

4

FB

5

VCC

DC

DE

CF

6

IS

7

BOOST

8

U1

SS6563

+

C3

220

µF

R4

390K

D3

IN4148

D1

IN4148

D2

IN5819

D4

1N5819

VIN

VOUT

GND

U3

78L05

**3~5 NiMH/NiCd cells.

Note: Charge Current=0.3/RS Ampere

Safety Timer: 80min

Battery Charge Circuit for Fluctuating Charging Current Application

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.