mm1433 Mitsumi Electronics, Corp., mm1433 Datasheet - Page 4

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

MITSUMI
Pin No. Pin name
11
12
13
14
15
16
17
18
19
20
21
22
23
24
OSC FB- Input
LED G Output
OSC OUT Output
LED R
TDET
BAT1
BAT2
ADJ4
ADJ5
CNT
CFB
V
V
CS
OUT
CC
Output
Output
Output
Input
Input
Input
Input
Input
Input
Input
Input
I/O
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.
Temperature detection input pin
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.
Battery voltage input pins
Detect battery voltage and control charging.
Current detection pin
Detects current by external resistor (between CS and BAT) voltage drop and
controls charging current.
Rated current control phase compensation pin
Oscillation is improved by connecting an external capacitor (around 100pf)
between CFB and CNT for phase compensation.
Charging control output pin
Controls external PNP-Tr base for rated current rated voltage charging.
Power supply input pin
Rated voltage control adjustment pin
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
For V
For V
LED C control output pin
NPN-Tr open collector output. Refer to the flow chart for ON/OFF.
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.
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 130kΩ and
capacitor of 0.01µF.
Oscillator inverted input pin
CC
CC
overvoltage input: L
recommended operating voltage: H
Lithium-Ion Battery Charge Control (1 to 2 cells) MM1433
Functions