HA16108FP HITACHI [Hitachi Semiconductor], HA16108FP Datasheet - Page 30

• Manufacturer Part Number: HA16108FP
• Description: PWM Switching Regulator for High-performance Voltage Mode Control
• Manufacturer: HITACHI [Hitachi Semiconductor]

HA16107P/FP, HA16108P/FP
30
Operating waveform at the TL pin
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
SW ON
SW ON
t
SW OFF
SW OFF
ON
t
ON
A
A
When overcurrent is input at the point
where the duty cycle is 30%.
When overcurrent is input at the point
where the duty cycle is 0%.
Output pulse shutdown region
Output pulse shutdown region
t
OFF
B
t
OFF
B
0.5 sec/div
0.5 sec/div
1000 pF
Test circuit
Triangle
wave
CL(+) when
input at a
duty of 0%
CL(+) when
input at a
duty of 30%
V
V
C
27 k
TL
TL
L
b
b
a
to
to
Clock
a
b
c
470 pF
: PWM pulse output is High
: PWM pulse output is Low.
: The point where overcurrent
b
V
Enlargement of section
Enlargement of section
CTL discharged at 12 A
is detected
IN
HA16107
Du =
OUT
CL(+)
R
C
R
CTL discharged at 4 A
CTL discharged at 4 A
c
T1
T
T2
27 k
t1
Vref
V
R
C
f
TL
S
OSC
t1
t2
IN
T
T1
T
t2
= 470 pF
= 18V
= R
= 100 kHz
+
T2
100 (%)
1 F
= 27 k
+
t
t
C
1 F
ST
SW
A
B