M61041FP

Rev.1.0, Sep.19.2003, page 2 of 28

Output

selector

VREG

GND

VIN_11

VIN_1

CIN

VIN_12

CFOUT

DFOUT

Analog

_OUT

VCC

Series

regulator

Charge/discharge

current detect circuit

Battery

voltage

detect

circuit

VIN_2

VIN_3

VIN_4

Overcurrent

detect circuit

Delay circuit

Battery 1-4

analog

output

Serial/parallel

converter

circuit

CS

DI

CK

Regulator

On/off control

Power-down

circuit

Shift

voltage

adjustor

Gain switcher circuit

FET

control circuit

Figure 2 Block Diagram

Pin Function Description

Table 1

Pin No.

Symbol

Function

1

Vcc

The chip’s power supply pin. Power is supplied by the charger or the battery.

2

VIN_1

Positive input pin for lithium ion battery 1.

3

VIN_2

Negative input pin for lithium ion battery 1. Positive input pin for lithium ion battery 2.

4

VIN_3

Negative input pin for lithium ion battery 2. Positive input pin for lithium ion battery 3.

5

VIN_4

Negative input pin for lithium ion battery 3. Positive input pin for lithium ion battery 4.

6

VIN_12

Charger connect monitor pin. Detects changes from power-down status.

7

DFOUT

Output pin for discharge FET on/off signals. Also turns off when overcurrent detected.

8

CFOUT

Output pin for charge FET on/off signals.

9

GND

Ground pin. Negative input pin for lithium ion battery 4. Connected to charge/discharge

current sensor resistor.

10

VIN_11

Charge/discharge current monitor pin. Connected to charge/discharge current sensor

resistor.

11

Analog_OUT

Output pin for analog signals.

12

CIN

Capacity connection pin for setting overcurrent prevention delay time.

13

CS

When this pin is low level, data input is accepted and data can be stored in a 6-bit shift

register. At the rising edge from low to high the value in the 6-bit shift register is

latched.

14

CK

Shift clock input pin. At the rising edge to high the input signal from the DI pin is input to

the 6-bit shift register.

15

DI

Shift data input pin. Serial data with a data length of 6 bits may be input via this pin.

16

Vreg

Power supply pin for microprocessor. Power can be shut off using a signal from the

microprocessor.