mm1433 Mitsumi Electronics, Corp., mm1433 Datasheet - Page 3

• Manufacturer Part Number: mm1433
• Description: Lithium-ion Battery Charge Control
• Manufacturer: Mitsumi Electronics, Corp.

MITSUMI
Pin Description
Pin No. Pin name
10
1
2
3
4
5
6
7
8
9
CHGSW Input
RESET
GND1
GND2
VREF
ADJ1
ADJ2
ADJ3
TP1
TP2
Output
Output
Input/
Output
Input/
Input
Input
Input
Input
Input
Input
I/O
Forced charging OFF pin
L: Forced charging circuit ON (OFF for reset)
H: Charging stop is forced
Logic reset pin
L: Forced charging circuit ON (start)
H: Forced charging circuit OFF
Test pin 1
Pre-charge timer test pin
Inverts while counting (the middle stage of the several FF stages) and output to
TP1, to permit monitoring.
Also, TP1 output signal is inverted again inside the IC and inputs to the next stage
FF. (Timer setting is done by binary counter.)
Test pin 2
Full charge timer test pin
Same structure as TP1
Reference power supply output pin
Outputs 1.2V typ. reference voltage. Used for temperature detection reference
power supply and ADJ1 - ADJ4 adjustment.
GND pin.
GND pin.
Overcurrent detection adjustment pin
Set so that overcurrent detection does not function. Pin voltage is 1.16V typ.
Overcurrent detection value can be varied by adjusting pin voltage with an external
resistor, etc. Overcurrent detection is based on a comparison of ADJ1 pin voltage
and a CS-BAT voltage drop of 12dB.
Full charge detection adjustment pin
Pin voltage is set at 103mV typ. Full charge detection value can be changed by
adjusting pin voltage with an external resistor, etc.
Full charge detection is done by comparing ADJ2 pin voltage and 12dB voltage
drop value between CS and BAT.
Pre-charge current adjustment pin
Pin voltage is set at 120mV typ. Pre-charge current can be changed by adjusting
pin voltage with an external resistor, etc.
Pre-charge current control is done by comparing ADJ3 pin voltage and 12dB
voltage drop value between CS and BAT.
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
Functions