M62255FP Просмотр технического описания (PDF) - Renesas Electronics

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производитель

M62255FP

General Purpose Battery Charger Control IC

Renesas Electronics 

M62255FP

4.9 V

To DOUT

3.7 V

2.5 V

1.2 V

1.3 V

0.3 V

3.1 V

2.8 V

2.5 V

2.2 V

1.9 V

Reference voltage

0.1 V

To DOUT

4 times amplifier

Input voltage

Figure 2 Description of Level Magnification

Output voltage of DOUT is fixed as follows;

VDOUT = (VIN – Vref) × 4 + Vref (V) …………….. (1)

VDOUT: Output voltage of DOUT

VIN:

Voltage of IN1 (or IN2, IN3, IN4)

Vref: Reference voltage for A/D converter

In figure 2 reference voltage is 2.5 V. When input voltage of IN1 (or IN2, IN3, IN4) is set at 2.8 V, the difference

between input voltage and reference voltage is 0.3 V. The difference voltage (0.3 V) multiplied by 4 is 1.2 V. 1.2 V

added to reference voltage (2.5 V) makes 3.7 V which is output voltage of VDOUT.

The range of output voltage of VDOUT is between 0 V and 5 V. So in figure 2 the range of input voltage of IN1 (or IN2,

IN3, IN4) is between 1.9 V and 3.1 V. (This range of input voltage is difference from selected reference voltage.)

REJ03F0245-0200 Rev.2.00 Sep 14, 2007

Page 9 of 12

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