Fujitsu MB3788 User Manual download pdf (Page 3)

MB3788

■

■■

■

PIN DESCRIPTION

Note: The alphabetic characters in parenthesis above indicate the following input pins.

(C): Comparator

(E): Error amplifier

Pin No. Pin name I/O Descriptions

Channel 1

2OUT1O

Channel 1 push-pull type output

3VE1I

Channel 1 output current setting

4Ca1—

Channel 1 output transistor OFF current setting: Output transistor OFF

The current is set by connecting a capacitor between pins Ca1 and Cb1.

5Cb1—

6FB1O

Channel 1 error amplifier output

7-IN1(E)I

Channel 1 error amplifier inversion input

8+IN1(E)

Channel 1 error amplifier non-inversion input

9-IN1(C)I

Channel 1 comparator inversion input

Channel 2

16 -IN2(C) I

Channel 2 comparator inversion input

17 +IN2(E) I

Channel 2 error amplifier non-inversion input

18 -IN2(E) I

Channel 2 error amplifier inversion input

19 FB2 O

Channel 2 error amplifier output

20 Ca2 —

Channel 2 output transistor OFF current setting: Output transistor OFF

The current is set by connecting a capacitor between pins Ca2 and Cb2.

21 Cb2 —

22 VE2 I

Channel 2 output current setting

23 OUT2 O

Channel 2 push-pull type output

Control

circuit

13 CTL1 I

Power and channel 1 control pin

H level: Power and channel 1 operating

L level: Standby

14 CTL2 I

Channel 2 control pin

When CTL1 pin = H level,

H level: Channel 2 operating

L level: Channel 2 OFF

15 SCP —

Short-circuit protection circuit capacitor connection

Power

circuit

—

Output circuit power pin

10 -IN(PWM) I

Master oscillating waveform input

11 VCC1 —

Reference power and control circuit power

12 VREF O

Reference voltage output

24 GND —

Ground

1 2 3 4 5 6 7 8 ... 20 21

Comments to this Manuals

No comments

Fujitsu MB3788 User Manual Page 3

Comments to this Manuals

Related products and manuals for Voltage regulators Fujitsu MB3788