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FAN73402 Datasheet, PDF (6/16 Pages) Fairchild Semiconductor – LED Backlight Driving Boost Switch
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Electrical Characteristics (Continued)
For typical values, TA = 25°C and VCC = 15V, unless otherwise specified. Specifications to -25°C ~ 85°C are
guaranteed by design based on final characterization results.
Symbol
Parameter
Condition
Min. Typ. Max. Unit
Output Section (Boost / Dimming)
VDRV
Vuv
Idsur
Idsin
trh
tfl
Gate Output Voltage
Gate Output Voltage Before Startup
Gate Output Drive-Source Current(4)
Gate Output Drive-Sink Current(4)
Gate Output Rising Time (Boost)(4)
Gate Output Falling Time (Boost) (4)
Current Sense Section
tblank
Leading-Edge Blanking(4)
tdelay,cl
Delay to Output of Current-Limit
Comparator(4)
Voffset,clc
Offset Voltage of Current-Limit
Comparator(4)
VCC=15V
CL=2.0nF
CL=2.0nF
10.8 11.8 12.8
V
-0.5
0.5
V
80
180 280 mA
80
180 280 mA
200
ns
120
ns
150 300 450
ns
180
ns
-20
20
mV
Slope Compensation Section
Islope
Rslope
Ramp Generator Current
Slope Compensation Resistor (4)
Soft-Start Section
tss
Soft-Start Period(4)
Protection Section
td,ovp.tr
Delay for Triggering Over-Voltage
Protection(4)
td,ovpr
td.ocp
tAR
Delay for Releasing Over-Voltage
Protection(4)
Delay for Over-Current Protection(4)
Auto-Restart Time for Over-Current
Protection(4)
td,olpi
Delay for Triggering Open-LED
Protection(4)
td,olp
Vth,ovp
Delay for Open-LED Protection
Over-Voltage Protection Threshold
Voltage
Vhys,ovp
Over-Voltage Protection Voltage
Hysteresis
Vth.csocp
Boost Switch Current-Limit Threshold
Voltage
fosc=200kHz
fosc=200kHz
fosc=200kHz
Vth,ocp
LED Over-Current Protection
Threshold Voltage
Vth,olp
Open-LED Protection Threshold
Voltage(4)
TSD
THYS
Thermal Shutdown Temperature(4)
Thermal Shutdown Hysteresis(4)
Note:
4. These parameters, although guaranteed, are not tested in production.
36
45
54
µA
5
kΩ
3
ms
15
20
25
µs
10
14
18
µs
1
µs
640
µs
3
5
7
µs
40.96
ms
2.85 3.00 3.15
V
0.1
V
0.45 0.50 0.55
V
1.4
(Min.
4.0xVA
4.0
(Max.
V
Clamp) DIM Clamp)
0.15 0.20 0.25
V
140 150 160
°C
20
°C
© 2012 Fairchild Semiconductor Corporation
FAN73402 • 1.0.0
6
www.fairchildsemi.com
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