FAN7346 View Datasheet(PDF) - Fairchild Semiconductor
Part Name
Description
Manufacturer
FAN7346 Datasheet PDF : 19 Pages
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Electrical Characteristics
For typical values; TA = 25°C, VIN = 12V, and -25°C TA 85°C, unless otherwise specified. Specifications to -40°C ~
125°C are guaranteed by design based on final characterization results.
Symbol
Parameter
Condition
Under-Voltage Lockout Section (UVLO)
Vth
Start Threshold Voltage
Vthhys
Start Threshold Voltage Hysteresis
Ist
Startup Current
Iop
Operating Supply Current
ON/OFF Section
VIN=8V
VIN=12V, Not Switching
Von
On-State Input Voltage
Voff
Off-Stage Input Voltage
RENA
Pull-Down Resistor
Reference Section (Recommend 1µF X7R Capacitor)
VREF
5V Regulation Voltage
IREF=0mA
VR-LINE 5V Line Regulation
VR-LOAD 5V Load Regulation
VDD
8.5V Regulation Voltage
LED Current Section
10 VIN 35V
0 IREF 3mA
VIN=12V
VFBX
CH LED Current Reference Voltage VADIM=2V
VLREF LED Current Reference Voltage
0.5V VADIM 4V
VADIM-CLAMPH ADIM Voltage HIGH Clamping Voltage
VADIM-CLAMPL ADIM Voltage LOW Clamping Voltage
BCH
Current Balance Between Channels
Headroom Voltage Feedback Section
VIN=12V
VIN=12V
VADIM=2V
VFBR
Ileak
AV
Gm
Feedback Reference Voltage
Channel Leakage Current
Open-Loop Gain(3)
Error Amplifier Transconductance
PWM ON, VCH=1V
PWM OFF, VCH=30V
VVMIN=1V
VVMIN=1.5V
lsin
Output Sink Current
lsur
Output Source Current
VVMIN=0V
VVMIN=2V
Min. Typ. Max. Unit
8.5
9.5
10.5
V
0.5
1.0
1.5
V
100
300
µA
1
3
mA
1.4
5.0
V
0.7
V
130
200
270
kΩ
4.9
5.0
5.1
V
50
mV
50
mV
8.0
8.5
9.0
V
194
200
206
mV
VADIM
/10
V
3.84 4.00 4.16
V
0.45 0.50 0.55
-1.5
1.5
%
0.95 1.00 1.05
V
0
100
µA
0
2
µA
65
dB
140
180
220 µmho
70
120
170
µA
70
120
170
µA
Continued on the following page…
© 2011 Fairchild Semiconductor Corporation
FAN7346 • 1.0.0
5
www.fairchildsemi.com
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