HV9120 Supertex, Inc., HV9120 Datasheet - Page 4

• Manufacturer Part Number: HV9120
• Description: High-voltage Current-mode Pwm Controller
• Manufacturer: Supertex, Inc.

Truth Table
Shutdown Timing Waveforms
Functional Block Diagram
Shutdown
L → H
H
H
L
L
Shutdown
Output
Sense
Reset
+V
BIAS
V
V
1.5V
DD
IN
REF
V
H → L
Reset
DD
0
0
V
V
11 (14)
H
H
L
L
16 (20)
7 (9)
1 (3)
DD
DD
0
0
Pre-regulator/Startup
15 (19)
50%
Current
Sources
Normal Operation
Normal Operation, No Change
Off, Not Latched
Off, Latched
Off, Latched, No Change
GEN
REF
FB
50%
t
–
+
Error
Amplifier
d
+
–
4V
Internal
Circuits
8.6V
COMP
14
To
Pin number in parentheses are for PLCC package.
90%
Output
t
R
8.1V
≤ 10ns
(18)
2V
1.2V
50%
Discharge
–
+
+
–
10
–
+
t
(12)
SW
Undervoltage
Comparator
Current Limit
Comparator
Comparator
Modulator
t
LW
9
OSC
In
4
(11)
OSC
8
R
OSC
S
Out
50%
(10)
Q
Shutdown
Output
50%
Q
9123
T
S
R
V
V
DD
DD
0
0
9120
V
t
Q
DD
RW
50%
12 (16)
13 (17)
4 (5)
50%
t
SD
To V
Sense
Shutdown
Reset
DD
6 (8)
90%
5 (6)
IN
Output
t
R
, t
HV9120/HV9123
t
F
F
≤ 10ns
≤ 10ns