HV9963 データシートの表示（PDF） - Supertex Inc
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HV9963 Datasheet PDF : 12 Pages
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HV9963
Electrical Characteristics (cont.)
(The * denotes the specifications which apply over the full operating ambient temperature range of -40OC < TA < +125OC, otherwise the specifications are
at TA = 25OC. VIN = 24V, CPVDD = 1.0μF, CAVDD = 1.0μF, CGATE = 2.0nF, CFLT = 330pF unless otherwise noted.)
Sym
Description
Min Typ
Max Units Conditions
Output Short Circuit
GSC
Vdisable
Vomin
Gain for short circuit comparator
Voltage at IREF pin to disable the
short circuit comparator
Minimum output voltage of the gain
stage
- 1.8 2.0
- 1.19 1.25
* 0.14 0.20
2.4
1.31
0.30
- ---
PWMD = VDD;
V FB = 3.2V;
FLT is HIGH
V IREF = GND
PWMD = VDD,
IREF = 400mV;
TOFF
Propagation time for short circuit
detection
--
-
250
ns FB step from 0 to 900mV;
FLT goes from high to
low; no capacitance at
FLT pin
TRISE,FAULT Fault output rise time
--
-
500
ns ---
TFALL,FAULT Fault output fall time
--
-
300
ns ---
TBLANK,SC Blanking time
* 400
-
800
ns ---
Note:
* Denotes the specifications which apply over the full operating ambient temperature range of -40°C < TA < +125°C.
Functional Block Diagram
VIN
PVDD GATE GND
REF
10V Regulator
AVDD
5.0V Regulator
POR
SYNC
RT
CS
OVP
IRT
CLK
DIM
K*IRT
Blanking
SC
S
Q
R
Q SC
+
-
Enhanced
DIM
PWMD
Logic
/12
+
FC
DIM
1.25V/ -
1.125V
FT
QS
HCP
11µA
FT
0.1V
+
2.1V
-
R
FC
DIS
POR
FC
DIM
11µA
DIS
DIS
+
-
2
200mV
Blanking
DIM
FLT
PWMD
SS
COMP
IREF
FB
● 1235 Bordeaux Drive, Sunnyvale, CA 94089 ● Tel: 408-222-8888 ● www.supertex.com
5
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