MB3832A データシートの表示（PDF） - Fujitsu

部品番号

コンポーネント説明

一致するリスト

MB3832A

DC/DC Converter IC for Charging

Fujitsu 

MB3832A

s METHOD OF SETTING FOR EXTERNAL SYNCHRONOUS OSCILLATION

For external synchronous oscillation, connect a timing capacitor (CT), a timing resistor (RT), and an external sync

signal to the CT, RT, and SYNC terminals, respectively.

In this case, select the CT and RT so that the oscillation frequency is 5% to 10% lower than the frequency of the

external synchronous signal excluding the setting error of the oscillation frequency.

The duty cycle (t1/ t) of the external sync signal must be set within a range from 10% to 90%.

<Triangular wave oscillator (OSC) equivalent circuit>

VREF

+

2I* 1.9 V

−

CT

3

−

Latch1

SQ

R

CT

+

1.3 V

SYNC

4

“H” level: ON

3I*

+

1.4 V

−

Latch2

SQ

R

<Free-run oscillation>

1.9 V

VCT

1.3 V

5.0 V

VSYNC

0V

*: | = VRT/RT, VRT (pin voltage at pin 2) = 1.0 V (typical)

<External synchronous oscillation>

1.9 V

VCT

1.3 V

5.0 V

VSYNC

0V

t

t1

t

t

15

Share Link: