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FAN7311B Datasheet, PDF (5/14 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive IC
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Electrical Characteristics
For typical values, TA=25°C and VIN=12V. For min. and max. values, TA is the operating ambient temperature range
with -25°C ≤ TA ≤ 85°C and 5V ≤ VIN ≤ 25.5V, unless otherwise specified. Specifications from -25°C to 85°C are guar-
anteed by design based on final characterization results.
Symbol
Parameter
Test Condition Min.
REFERENCE SECTION (Recommend X7R Capacitor)
ΔVref Line Regulation
V25 2.5V Regulation Voltage
5 ≤ VIN ≤ 25.5V
2.45
OSCILLATOR SECTION (MAIN)
fosc Oscillation Frequency
TA = 25°C, CT = 270pF,
RT = 18kΩ
CT = 270pF, RT = 18kΩ
110.4
108
Vcth CT High Voltage
Vctl CT Low Voltage
OSCILLATOR SECTION (BURST)
foscb Oscillation Frequency
TA = 25°C, CTB = 10nF,
RT=18kΩ
209.25
CTB = 10nF, RT=18kΩ 206.25
Vbcth BCT High Voltage
Vbctl BCT Low Voltage
ERROR AMP SECTION
Av
GBW
Open Loop Gain(2)
Unit Gain Bandwidth(2)
Veh Feedback Output High Voltage
EA_IN = 0V
lsin Output Sink Current
EA_OUT = 1.5V
lsur Output Source Current
EA_OUT = 1.5V
Iolr EA_IN Driving Current on OLR
Iburst EA_IN Driving Current on Burst Dimming
Vfbh Feedback High Voltage on Burst Dimming R(EA_IN) = 60kΩ
SOFT-START SECTION
2.00
1
75
61
Va+0.1
ISS Soft-Start Current
S_S=1V
4
Vssh Soft-Start Clamping Voltage(2)
PROTECTION SECTION
Volp0 Open-Lamp Protection Voltage 0
Start at open lamp
2.2
Volp1 Open-Lamp Protection Voltage 1
Normal -> open lamp
1.3
Volr Open-Lamp Regulation Voltage
1.75
Iolp Open-Lamp Protection Charging Current
0.7
UNDER-VOLTAGE LOCKOUT SECTION
Vth Start Threshold Voltage
Ist Start-up Current
Iop Operating Supply Current
Isb Stand-by Current
VIN = Vth-0.2
VIN = 12V
VIN = 12V
Note:
2. These parameters, although guaranteed, are not 100% tested in production.
Typ.
2
2.50
115.0
115
2.0
0.5
225.00
225.00
2
0.5
80
1.5
2.27
105
85
Va+0.4
6
4
2.5
1.5
2.00
1.4
130
1.5
200
Max.
25
2.55
119.6
122
240.75
241.75
2.54
-1
135
109
Va+0.7
8
2.8
1.7
2.25
2.1
5
180
4.0
370
Unit
mV
V
kHz
V
V
Hz
V
V
dB
MHz
V
mA
mA
µA
µA
V
µA
V
V
V
V
µA
V
µA
mA
µA
© 2007 Fairchild Semiconductor Corporation
FAN7311B Rev. 1.0.0
5
www.fairchildsemi.com
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