HV9912 Supertex, Inc., HV9912 Datasheet - Page 4

• Manufacturer Part Number: HV9912
• Description: Switch-mode Led Driver Ic With High Current Accuracy And Hiccup Mode Protection
• Manufacturer: Supertex, Inc.

Electrical Characteristics
(Over recommended operating conditions. V
Notes:
Oscillator
Output Short Circuit
Slope Compensation
T
T
T
(1) See Application Information for Minimum Input Voltage.
*
#
I
V
RISE,FAULT
FALL,FAULT
G
V
OUTSYNC
I
BLANK,SC
V
I
Sym
D
HICCUP
f
f
T
SLOPE
G
OSC1
OSC2
SYNCH
SYNCL
SLOPE
OMIN
Denotes specifi cations guaranteed by design.
The specifi cations which apply over the full operating temperature range at 0
OFF
MAX
SC
Oscillator frequency
Oscillator frequency
Maximum duty cycle
SYNC input high
SYNC input low
SYNC output current
Gain for short circuit comparator
Minimum output voltage of the
gain stage
Propagation time for short circuit
detection
Fault output rise time
Fault output fall time
Blanking time
Current source at COMP pin used
for hiccup mode protection
Current sourced out of SC pin
Internal current mirror ratio
Parameter
IN
= 24V, T
(cont.)
A
= 25°C, unless otherwise specifi ed)
*
*
*
*
*
0.125
Min
510
500
2.0
1.9
1.8
99
87
0
-
-
-
-
4
Typ
106
580
2.0
5.0
2.0
18
-
-
-
-
-
-
-
-
-
O
C < T
Max
0.25
A
118
650
250
300
300
700
100
0.8
2.1
2.2
93
< +85
-
-
-
O
C are guaranteed by design and characterization.
Units
kHz
kHz
µA
µA
µA
ns
ns
ns
ns
%
V
V
V
V
-
Conditions
R
R
---
---
---
---
---
I
PWMD = V
FDBK step from 0 to 900mV;
FAULT goes from high to low
330pF capacitor at FAULT pin
330pF capacitor at FAULT pin
---
---
---
I
REF
SLOPE
T
T
= 500kΩ
= 96kΩ
= GND
= 50µA ; R
DD
, I
REF
SC
Preliminary
= 400mA;
= 1.0kΩ
HV9912