SM6780AS View Datasheet(PDF) - Nippon Precision Circuits
Part Name
Description
Manufacturer
SM6780AS Datasheet PDF : 11 Pages
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SM6780AS
Charging Operating Status
Charging status
Conditions
INH
Battery
check OK
Charging mode
CHGN output1
LEDN output
Internal timer
Quick charge
LOW
Yes
Quick charge
High impedance
LOW (ON)
Count
Quick charge hold
LOW
No
Pulse trickle 13.68Hz, 3.91% duty
1Hz (pulsing)
Count
Quick charge inhibit
HIGH
–
Pulse trickle
13.68Hz, 3.91% duty
Same condition as
when INH went HIGH
Hold
Supplemental charge
LOW
OK
Supplemental 218Hz, 6.25% duty High impedance (OFF)
Count
Supplemental charge inhibit HIGH
OK
Pulse trickle 13.68Hz, 3.91% duty High impedance (OFF)
Hold
Pulse trickle
–
–
Pulse trickle 13.68Hz, 3.91% duty High impedance (OFF)
–
Standby
–
–
–
High impedance High impedance (OFF)
Reset
1. Frequency and duty are typical values.
TYPICAL APPLICATION CIRCUIT
VBB 12V
VDD 5V
SW1
R5
1.8kΩ
R3
100kΩ
R4
100kΩ
External current source
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
SM6780AS
6 VDD
CHGN 8
2 LEDN
INH 7
1 TIME
TEMP 5
4 VSS
BATT 3
R9
200kΩ
SW2
R8
100kΩ
R10
200kΩ
R9
R10
=
N
−
1
N= Number of cells
R12
12kΩ
NTC
R:10kΩ
(at 25 C)
B:3435K
R11
640Ω
R13
14kΩ
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—10
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