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FAN7318B PDF даташит
| Спецификация FAN7318B изготовлена «Fairchild Semiconductor» и имеет функцию, называемую «LCD Backlight Inverter Drive IC». |
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Детали детали
| Номер произв | FAN7318B |
| Описание | LCD Backlight Inverter Drive IC |
| Производители | Fairchild Semiconductor |
| логотип |  |
24 Pages
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August 2009
FAN7318B
LCD Backlight Inverter Drive IC
Features
High-Efficiency Single-Stage Power Conversion
Wide Input Voltage Range: 6V to 30V
Backlight Lamp Ballast and Soft Dimming
Minimal External Components Required
Precision Voltage Reference Trimmed to 2%
Half-Bridge Topology
Soft-Start
PWM Control at Fixed Frequency
Analog Dimming Function
Burst Dimming Function
Programmable Striking Frequency
Open-Lamp Protection
Open-Lamp Regulation
Over-Voltage Protection
Short-Lamp Protection
CMP-High Protection
Thermal Shutdown
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Applications
LCD TV
LCD Monitor
Description
The FAN7318B is a LCD backlight inverter drive IC that
controls P-N half-bridge topology.
The FAN7318B provides a low-cost solution and reduces
external components by integrating proprietary wave
rectifiers for open-lamp protection and regulation. The
operating voltage range of the FAN7318B is wide, so an
external regulator isn’t necessary to supply the voltage to
the IC.
The FAN7318B provides various protections, such as
open-lamp regulation, over-voltage protection, open-
lamp protection, short-Lamp protection, CMP-high
protection, to increase the system reliability. The
FAN7318B provides burst dimming and analog dimming.
The FAN7318B is available in a 20-SOIC package.
Ordering Information
Part
Number
Operating
Temperature
Package
FAN7318BM
FAN7318BMX
-25 to +85°C
20-Lead, Small Outline Integrated Circuit (SOIC)
Eco
Status
RoHS
Packing
Method
Rail
Tape & Reel
For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html.
Protected under U.S. patent no. 5,652,479.
© 2009 Fairchild Semiconductor Corporation
FAN7318B • 1.0.0
www.fairchildsemi.com
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Block Diagram
OLR1
Min.
0.3V
Short-Lamp Protection
-
+
OLR2
OLR3
OLR4
CT
Min. &
Max.
Detector
/Full Wave
Recifier
Max.
1.34V
Over-Voltage Protection
+
-
max. 2V
min. 0.5V
+
2V -
1.34V
+
-
-
2.2V +
0μA
3.2μA
Error. Amp. source
current change
Gm Amp.
Open-Lamp Regulation
On @ striking
-
Protection
Oscillator
50µA @ OVP,SLP
2µA @ OLP.CMP high
3V/1V @ striking/normal
TSD 150oC
Output Driver
Control
Logic
CMP
ADIM
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Error. Amp. source
current change
Negative
Analog
Vref
+
Error Amp.
Dimming
- 3.5V
+
-
+
High_CMP
52μA burst
sink current on
High CMP Protection
disable @ striking
OLP1
OLP max.
Striking off
-
+
Hys. 0.45V
UVLO 5.5V
1.35V
200k
Voltage Reference
& Internal Bias
5V, max. 3mA
OLP2
OLP3
OLP4
Min. & Max.
Detector
/Full or Half
Wave
Rectifier
OLP min.
0.7V/0.5V
Striking/normal
-
+
17 Pulses Counter
And OLR<1.4V
OLP
150μs
Delay
52μA burst
sink current on
If ENA>2.5V, OLP & SLP disable.
If ENA<2.1V, OLP & SLP enable.
max. 2V
min. 0.5V
disable @ striking
TIMER
OUTA
OUTB
GND
VIN
ENA
REF
BCT
BDIM
Figure 1. Internal Block Diagram
© 2009 Fairchild Semiconductor Corporation
FAN7318B • 1.0.0
2
www.fairchildsemi.com
No Preview Available ! |
Pin Configuration
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
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Figure 2. Package Diagram
© 2009 Fairchild Semiconductor Corporation
FAN7318B • 1.0.0
3
www.fairchildsemi.com
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| Номер в каталоге | Описание | Производители |
| FAN7318 | LCD Backlight Inverter Drive IC | Fairchild Semiconductor |
| FAN7318A | LCD Backlight Inverter Drive IC | Fairchild Semiconductor |
| FAN7318B | LCD Backlight Inverter Drive IC | Fairchild Semiconductor |
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