MB3778 Datasheet, PDF (9/29 Pages) Fujitsu Component Limited. – Switching Regulator Controller

MB3778
s TEST CIRCUIT
SW
CPE
CTL
INPUT VCC = 6 V
TEST
4.7 kΩ
4.7 kΩ
16 15 14 13 12 11 10 9
MB3778
12345678
OUTPUT 1
OUTPUT 2
330 pF
15 kΩ
TEST
INPUT
s TIMING CHART (Internal Waveform)
Triangular waveform oscillator output
Short circuit protection
comparator Reference
input
Dead Time, PWM input
voltage
2.1 V
1.9 V
1.6 V
1.3 V
Error Amp. output
PWM comparator
output
"High"
"Low"
Output Transistor
collector waveform
"High"
"Low"
S.C.P. Terminal
waveform
0.65 V
0.05 V
Short circuit protection ^"High"
comparator output
"Low"
Control Terminal
voltage
2.1 V
(VCTL : Min. Value)
0V
Power supply voltage
3.6 V
(VCC : Min. Value)
0V
Power “ON”
DEAD TIME 100%
tPE
Power “OFF”
Protection Enable Time tPE 0.6 × 10⁶ × CPE (µs)
9