MM1475 データシートの表示（PDF） - Mitsumi
部品番号
コンポーネント説明
メーカー
MM1475 Datasheet PDF : 11 Pages
| |||
MITSUMI
Lithium Ion Battery Charging Control (microcomputer-controlled type) (one cell) MM1475
Pin Description
Pin No.
1
2
3
5
6
7
9
10
11
12
13
14
15
16
17
18
19
20
21
23
24
Pin name
SW1
SW2
TP1
VREF
GND1
I/O Function
Function
Input
Input
Charge control switching pin.
Switches charging ON/OFF and switches charging current by combinations
of SW1 and SW2 high and low.
Test pin 1.
Pre-charge timer test pin.
Input/output
Inverts during counting (from the middle stage of the several-staged FF) and
outputs on TP1 for monitoring.
Also inverts TP1 output signal again inside the IC and inputs to the next stage FF.
(Timer setting done by binary counter.)
Output
Reference power supply output pin.
Outputs 1.2V typ. reference voltage.
Input Ground pin.
GND2
ADJ1
CDO
TOUT
TDET
BAT
CS -
CS+
CFB
CNT
VCC
VOUT2
VOUT1
VDET-TD
OSC OUT
OSC FB -
Input
Input
Output
Output
Input
Input
Input
Input
Input
Output
Input
Output
Output
Input
Output
Input
Ground pin.
Pre-charge current adjustment pin.
Pin voltage is set at 100mV typ.. Pre-charge current can be changed by
adjusting pin voltage with an external resistor.
Pre-charge current is controlled by comparing ADJ1 pin voltage and the 12dB
voltage drop value between CS + and CS -.
Current detection output pin.
Outputs voltage difference of 18dB between CS+ and CS -.
Temperature detection output pin.
Normal temperature: Output Tr OFF
When high temperature is detected: Output Tr ON
Temperature detection input pin.
Be sure to apply the potential obtained by resistance dividing, from reference
voltage, with an external resistor and thermistor.
Battery voltage input pin.
Detects battery voltage and controls charging.
Current detection pin.
Detects current by voltage drop at external resistor between (CS+) and (CS -)
and controls charging current.
Rated current control phase compensation pin.
Oscillation is improved by connecting an external capacitor (around 100pF)
between CFB and CNT to perform phase compensation.
Charging control output pin.
Controls base of external PNP-Tr for rated current rated voltage charging.
Power supply input pin.
Adapter unplugged detection output pin.
VCC low voltage input: Output Tr OFF
VCC recommended operating voltage: Output Tr ON
Overvoltage detection output pin.
VCC overvoltage input: Output Tr OFF
VCC recommended operating voltage: Output Tr ON
Overvoltage detection delay time setting pin.
Delay time is set by connecting an external capacitor.
Oscillator output pin.
Timer setting time changes according to oscillation frequency. Oscillation
frequency is determined by the external resistor (connected between OSC
OUT and OSC FB) and capacitor (connected between OSC FB and GND).
Oscillator inverted input pin.
Share Link: 