HV9803B 查看數據表（PDF） - Supertex Inc
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HV9803B Datasheet PDF : 7 Pages
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HV9803B
Electrical Characteristics (cont.)
(The * denotes specifications which apply over the full operating ambient temperature range of -40°C<TA<125°C. Otherwise specifications are at TA =
25°C. VDD = 12V, PWMD = 5.0V, unless otherwise noted)
Sym
Description
Min Typ Max Units Conditions
Current Sense Comparator
VLD
VCS
AV(LD)
TBLANK
TON(MIN)
DMAX
External reference voltage
CS reference voltage
LD to CS voltage ratio
Current sense blanking interval
Minimum on-time
Maximum steady-state duty cycle
-
0
-
3.0
V ---
* 284
-
296
mV VLD = 0.6V
* 866
-
902
VLD = 1.8V
-
-
0.495
-
- ---
* 150
-
280 ns ---
-
-
* 85
-
760
ns VCS = 0.5VLD +30mV
Reduction in output LED
-
-
% current may occur beyond
this duty cycle
Short Circuit Protection
VLIM
Internal current reference
TDELAY
RUVLO(R)
Current limit delay CS-to-GATE
UVLO skip timer reset switch
resistance
- 1.57
-
1.93
V ---
-
-
-
150
ns VCS = VLIM +30mV
-
-
-
500
Ω ---
VUVLO(R) UVLO skip timer reset voltage
TON(MIN) Minimum on-time (short circuit)
TOFF Timer
TOFF
Off time
- 200
-
-
-
-
6.7 9.0
-
0.8 1.0
IRT(LIM)
RT over-current threshold
GATE Driver
ISOURCE Gate sourcing current
ISINK
Gate sinking current
tRISE
GATE output rise time
tFALL
GATE output fall time
UVLO
UVLO Under-voltage threshold voltage
-
-
2.8
- 0.165 -
- 0.165 -
-
-
30
-
-
30
* 1.17
-
ΔUVLO
Under-voltage threshold voltage
hysteresis
-
-
150
# Guaranteed by design
* Limits over temperature are guaranteed by design and characterization
300
430
11.3
1.2
-
-
-
50
50
1.29
-
mV ---
ns VCS = VLIM +30mV
μs RT = 250kΩ
μs RT = 25kΩ
mA ---
A
VGATE = 0V
A
VGATE = VDD
ns CGATE = 500pF
ns CGATE = 500pF
V VUVLO rising
mV VUVLO falling
Doc.# DSFP-HV9803B
B032114
Supertex inc.
3
www.supertex.com
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