HA16108FP HITACHI [Hitachi Semiconductor], HA16108FP Datasheet - Page 31

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

Operating waveform at the ON/OFF 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 0%.
When overcurrent is input at the point
where the duty cycle is 30%.
t
OFF
B
Output pulse shutdown region
Output pulse shutdown region
B
t
OFF
t
ON
t
OFF
t
ON
t
ON
t
OFF
t
OFF
0.5 sec/div
0.5 sec/div
HA16107P/FP, HA16108P/FP
1000 pF
Test circuit
C
Triangle
wave
CL(+) when
input at a
duty of 0%
CL(+) when
input at a
duty of 30%
V
V
L
27 k‰
TL
TL
a
b
b
to
to
Clock
a
c
b
470 pF
: PWM pulse output is High.
: The point where overcurrent
: PWM pulse output is Low.
b
V
is detected.
Enlargement of section
Enlargement of section
CTL discharged at 12 A
IN
HA16108
Du =
OUT
CL(+)
R
C
R
ON/OFF
CTL discharged at 4 A
c
T1
T
T2
CTL discharged at 4 A
27 k‰
t 1
V
R
C
f
S
OSC
t 1
t
IN
T1
T
T
2
t
2
= 18V
= R
= 470 pF
= 100kHz
+
100 (%)
1 F
T2
+
= 27 k‰
C
1 F
t
t
ST
A
B
31