M62255FP Ver la hoja de datos (PDF) - Renesas Electronics

Número de pieza

componentes Descripción

Fabricante

M62255FP

General Purpose Battery Charger Control IC

Renesas Electronics 

M62255FP

Block Description

(1) Battery Voltage Detect Block

DI

Serial data

from MCU

CK

CS

Serial-parallel

converter circuit

Reference 5.0 V

voltage for

A/D converter 0.31 V

1

1

−

+

−

× 10

+

−

× 10

+

+

−

3

1

ISENSE2−

ISENSE2+

ISENSE1−

ISENSE1+

IN1

IN2

IN3

IN4

DOUT

to A/D input of MCU

Figure 1 Block Diagram of Multiplexer and Level Magnification Circuit

Multiplexer and level magnification circuit of M62255 consists from reference voltage, 4 times amplifier, 10 times

amplifier and 4 input multiplexer.

When setting the reference voltage correspond to detecting voltage by serial data from MCU, this set voltage supply to

reference voltage for A/D converter. The difference between input voltage of IN1 to IN4 and reference voltage is

multiplied by 4 at the center of this setting voltage.

This multiplied voltage is supplied to A/D input of MCU from DOUT terminal. The resolution of A/D converter of MCU

is improved by 2-bit as against the difference of IN1 to IN4 input.

REJ03F0245-0200 Rev.2.00 Sep 14, 2007

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