MB3775
■
TEST CIRCUIT
INPUT
TEST
SW
C
PE
4.7 kΩ
V
CC
=6 V
OUTPUT 1
4.7 kΩ
OUTPUT 2
16
15
14
13
12
11
10
9
MB3775
1
0.1
µF
330 pF
15 kΩ
2
3
4
5
6
7
8
TEST
INPUT
■
TIMING CHART (Internal Waveform)
Error Amp output
Triangular waveform oscillator output
1.9 V
Dead Time PWM
1.5 V
input voltage
1.3 V
Short circuit protection 1.1 V
comparator Reference
input
“High”
PWM comparator
output
“Low”
Output Transistor
collector waveform
SCP Terminal
waveform
“High”
“Low”
0.6 V
0V
t
PE
LOCK-OUT
DEAD TIME 100%
Short circuit protection “High”
comparator output
“Low”
LOCK-OUT CANCEL
Power supply voltage
3.6 V
(V
CC
: Min Value)
0V
Protection Enable Time t
PE
= 0.6 x 10
6
x C
PE
(s)
:
2.8 V (Typ Value)
7
FUJITSU [ FUJITSU COMPONENT LIMITED. ]
