M61040FP データシートの表示（PDF） - Renesas Electronics

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M61040FP

Smart battery protection and monitoring IC

Renesas Electronics 

M61040FP

Block Diagram Description

(1) Battery voltage detection circuit

The M61040 battery voltage detection circuit is shown in figure 3.

This circuit is composed of switch, buffer amplifier, reference voltage section and logic circuit.

Microcomputer selects detecting voltage before logic circuit controls the connection of switches. This connection

decides which cell voltage (Vbat1, Vbat2, Vbat3, Vbat4) should be output from analog out pin. Besides offset

voltage can be output.

In power down mode, supply current in this block is close to zero because all switches are off.

Note: Regard 50 µs as the standard of settling time by voltage change in this block.

VIN1

5

Vat1

S11

VIN2

6

Vat2

S22

S21

VIN3

7

Vat3

S32

S31

Switch Control

Logic Circuit

From Serial to Parallel

conversion circuit

VIN4

8

S42

Vat4

S41

To Multiplexer circuit

VIN10

11

S02

S01

Vref

GND

Figure 3 Battery Voltage Detection Circuit

REJ03F0237-0200 Rev.2.00 Mar 18, 2008

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