MM1433_ 查看數據表（PDF） - Mitsumi

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MM1433_

IC for Control of Lithium-ion Batteries Charging

Mitsumi 

MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Pin Description

Pin No. Pin name I/O

1 CHGSW Input

2 RESET Input

Input/

3

TP1

Output

Input/

4

TP2

Output

5 VREF Output

6 GND1 Input

7 GND2 Input

8 ADJ1 Input

9 ADJ2 Input

10 ADJ3 Input

11 ADJ4 Input

Functions

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.

Ground pin.

Ground pin.

Overcurrent detection adjustment pin

Set so that overcurrent detection does not function. Pin voltage is 1.16V typ.

Full charge detection adjustment pin

Pin voltage is set at 93mV 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.

Full charge current adjustment pin

Pin voltage is set at 0.89mV typ. Full charge current can be changed by adjusting

pin voltage with an external resistor, etc.

Full charge current control is done by comparing ADJ4 pin voltage and 12dB

voltage drop value between CS and BAT.

When full charge current is controlled to rated current by an adapter, short ADJ4

pin and VREF pin so that rated current control does not function in the IC.

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