Filter
Top Products
MB3788
3
■
■■
■
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
1
V
CC
2
—
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