MB3775 Datasheet, PDF (6/25 Pages) Fujitsu Component Limited. – SWITCHING REGULATOR CONTROLLER

MB3775
s TEST CIRCUIT
0.1 µF
SW
CPE
TEST
INPUT ^VCC=6V
4.7kΩ
4.7kΩ
16 15 14 13 12 11 10 9
MB3775
12 3 45 6 7 8
330pF
15kΩ
OUTPUT 1
OUTPUT 2
TEST
INPUT
s TIMING CHART (Internal Waveform)
Error Amp. output
Triangular waveform osillator output
Dead Time PWM
input voltage
Short circuit protection
comparator Reference
1.9V
1.5V
1.3V
1.1V
input
PWM comparator
“High”
output
“Low”
Output Transistor
collector waveform
“High”
“Low”
S.C.P. Terminal
waveform
0.6V
0V
Short circuit protection ^{“High”}
comparator output
“Low”
Power supply voltage 3.6V
(VCC : Min. Value)
0V
LOCK-OUT
LOCK-OUT CANCEL
2.8 V (Typ. Value)
DEAD TIME 100%
tPE
Protection Enable Time tPE 0.6 x 10⁶ x CPE (sec)
6