FAN7318B Datasheet, PDF (6/24 Pages) Fairchild Semiconductor – LCD Backlight Inverter Drive IC

Electrical Characteristics
For typical values, TA=25°C, VIN=15V, and -25°C ≤ TA ≤ 85°C, unless otherwise specified. Specifications to -25°C ~
85°C are guaranteed by design based on final characterization results.
Symbol
Parameter
Test Conditions
Under-Voltage Lockout Section (UVLO)
Vth
Start Threshold Voltage
Vthhys Start Threshold Voltage Hysteresis
Ist
Startup Current
Iop
Operating Supply Current
ON/OFF Section
Increase VIN
Decrease VIN
VIN=4.5V
VIN=15V, Not Switching
Von
On-State Input Voltage
Voff
Off-State Input Voltage
Isb
Standby Current
ENA=0V
RENA Pull-Down Resistor
ENA=2V
Reference Section (Recommend 1µF X7R Capacitor)
V5
5V Regulation Voltage
V5line
5V Line Regulation
V5load 5V Load Regulation
Oscillator Section (Main)
6 ≤ VIN ≤ 30V
10µA ≤ I5 ≤ 3mA
fosc
Oscillation Frequency
TA=25°C, CT=220pF,
RT=100kΩ
CT=220pF, RT=100kΩ
TA=25°C, CT=220pF,
fstr
Oscillator Frequency in Striking Mode ^{RT=100kΩ}
CT=20pF, RT=100kΩ
Ictdcs
Ictdc
CT Discharge Current
Ictcs
CT Charge Current
Vcth
CT High Voltage
Vctl
CT Low Voltage
Oscillator Section (Burst)
Striking
Normal
Striking
foscb
Burst Oscillation Frequency
Ibctdc
Vbcth
Vbctl
BCT Discharge current
BCT High Voltage
BCT Low Voltage
TA=25°C, BCT=4.7nF,
BRT=1.4MΩ
BCT=4.7nF,
BRT=1.4MΩ
Min.
4.9
0.20
10
0.5
1.4
50
120
4.9
101.3
101
126.5
126
1.03
770
-15
321
317
20
Typ. Max.
5.2
5.5
0.45 0.60
70
100
2.0
3.5
5.0
0.7
120 190
200 280
5.0
5.1
4
50
4
50
105.0 108.3
105 109
131.0 135.5
131 136
1.18 1.33
870 970
-12
-9
2
0.45
330 342
330 343
26
32
2
0.5
Unit
V
V
µA
mA
V
V
µA
kΩ
V
mV
mV
kHz
kHz
mA
μA
μA
V
V
Hz
μA
V
V
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© 2009 Fairchild Semiconductor Corporation
FAN7318B • 1.0.0
6
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