MITSUMI

IC for Control of Lithium-ion Batteries Charging MM1433

Pin No. Pin name

I/O

Functions

Temperature detection input pin

12

TDET

Input

Apply potential resistance divided by external resistor and thermistor from

reference voltage when using. Reset state will exist if TDET pin does not reach

the specified potential.

13

BAT1

Input

Battery voltage input pins

14

BAT2

Input

Detect battery voltage and control charging.

Current detection pin

15

CS

Input

Detects current by external resistor (between CS and BAT) voltage drop and

controls charging current.

Rated current control phase compensation pin

16

CFB

Input

Oscillation is improved by connecting an external capacitor (around 100pf)

between CFB and CNT for phase compensation.

17

CNT

Output

Charging control output pin

Controls external PNP-Tr base for rated current rated voltage charging.

18

Input

Power supply input pin

Rated voltage control adjustment pin

19

ADJ5

Input

Allows fine adjustment of rated voltage value. For example, rated voltage value

rises by around 15mV (at 4.1V typ.) when ADJ5-GND is shorted.

Overvoltage detection output pin

20

Output

21

LED G

Output

LED C control output pin

NPN-Tr open collector output. Refer to the flow chart for ON/OFF.

22

LED R

Output

LED R control output pin

NPN-Tr open collector output. Refer to the flow chart for ON/OFF.

Oscillator output pin

Timer setting time changes according to oscillation frequency.

23

OSC OUT

Output

Oscillation frequency is determined by an external resistor (connected between

OSC OUT and OSC FB) and capacitor (connected between OSC FB and GND).

For example, the full charge timer setting is 4H for external resistor of 130k

Ω and

capacitor of 0.01µF.

24

OSC FB-

Input

Oscillator inverted input pin