Electrical Characteristics (cont.)
Symbol Parameter
OFF-Time Generator
Min
Typ
Max Units
Conditions
TOFF
OFF time
8.0
10.5
13
μs
PWM Dimming
VPWMD,HI
VPWMD,LO
PWMD input high voltage
2.0
V
V
PWMD input low voltage
0.8
300
PWMD pull down resistance
100
200
Thermal Shutdown
TOT
Over temperature trip limit
Temperature hysteresis
140
60
°C
°C
THYST
Functional Block Diagram
GND
VDD
DRAIN
REG
PWMD
TOFF = 10μs
S
R
Q
Q
0.5V
-
+
Over Temp.
TBLANK = 300ns
HV9925
RSENSE
NR021506
3