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| FAN7346 Datasheet, PDF (6/19 Pages) Fairchild Semiconductor – 4-Channel LED Current Balance Controller | |||
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Electrical Characteristics (Continued)
For typical values; TA = 25°C, VIN = 12V, and -25°C ï£ TA ï£ 85°C, unless otherwise specified. Specifications to -40°C ~
125°C are guaranteed by design based on final characterization results.
Symbol
Parameter
Condition
Min.
PWM Dimming Section
Vbdim(ON) PWM Dimming On Voltage
Vbdim(Off) PWM Dimming Off Voltage
fbdim
tbdimR
PWM Dim Input Frequency Range(3)
PWM Dim On Rising Time(3)
tbdimF
PWM Dim Off Falling Time(3)
Soft-Start Section
tSS
Soft-Start Time(3)
Protection Section
VTH,OVR OVR Threshold Voltage
VTH,OCP
TOCP
OCP Threshold Voltage
OCP Shutdown Time(3)
VTH,SLP
TD,SLP
TD,OLP
SLP Threshold Voltage
SLP Delay(3)
OLP Delay(3)
VTH,OLP OLP Threshold Voltage
TTRIP
Internal Thermal Protection
Threshold(3)
TTYH
Internal Thermal Protection
Hysteresis(3)
On Duty Ratio=1%
Ext. Switch Qg=4.3nC
Ext. Switch Qg=4.3nC
VOVR=1V, ILED: 0 to
Maximum
VSLPR=1V
2
0
100
1.35
0.95
9.5
0.27
Output Section
VGH
NMOS Gate High Voltage
VIN=12V
8.0
VGL
VG,UVLO
NMOS Gate Low Voltage
NMOS Gate Voltage with UVLO
Activated
VIN=12V
VIN=7V
IG,SOURCE NMOS Gate Drive Source Current
VIN=12V
50
IG,SINK NMOS Gate Drive Sink Current
VIN=12V
300
Note:
3. These Parameters, although guaranteed, are not 100% tested in production.
Typ.
400
150
10
1.42
1.00
10
10.0
20
20
0.30
150
25
8.5
0
150
500
Max.
5
0.8
500
1.49
1.05
10.5
0.33
9.0
0.3
250
700
Unit
V
V
Hz
ns
ns
ms
V
V
µs
V
µs
µs
V
°C
°C
V
V
V
mA
mA
© 2011 Fairchild Semiconductor Corporation
FAN7346 ⢠1.0.0
6
www.fairchildsemi.com
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