SM6781BV Datasheet, PDF (9/10 Pages) Nippon Precision Circuits Inc – Ni-MH/Ni-Cd Battery Charger IC

SM6781BV
TYPICAL APPLICATION CIRCUIT
VBB 12V
VDD 5V
SW1
R5
1.8kΩ
R3
100kΩ
R4
100kΩ
R1
5.1kΩ
Q1
2SC945
78L05
IN OUT
VSS
5V
VBEQ2
Q2
2SD525
R2
4/5W
ICHG
ICHG
=
5
−
VBEQ2
R2
=
5 − 0.65
4
R6
33kΩ
Q3
2SC945
R7
100kΩ
SM6781BV
5 _VDD
CHGN ⁸
2 _LEDN
INH ⁷
1 _TIME
NC ⁶
4 _VSS
BATT ³
R9
200kΩ
R10
200kΩ
R9
R10
=
N
−
1
N= Number of cells
CPU
or
Temperature switch
(SM6611)
Note that the above circuit is an example circuit to demonstrate the connections for device functions. Battery
charger operation is not guaranteed.
NIPPON PRECISION CIRCUITS—9