Inverter Driver. FAN7311BM Datasheet

FAN7311BM Driver. Datasheet pdf. Equivalent


Fairchild Semiconductor FAN7311BM
FAN7311B
LCD Backlight Inverter Drive IC
January 2007
Features
„ High-Efficiency Single-Stage Power Conversion
„ Wide Input Voltage Range: 5V to 25.5V
„ Backlight Lamp Ballast and Soft Dimming
„ Reduced Number of Required External Components
„ Precision Voltage Reference Trimmed to 2%
„ ZVS Full-Bridge Topology
„ Soft-Start Capability
„ PWM Control at Fixed Frequency
„ Analog and Burst Dimming Function
„ Programmable Striking Frequency
„ Open-Lamp Protection
„ Open-Lamp Regulation
„ 20-Pin SOIC
Description
The FAN7311B provides all the control functions for a
series parallel resonant converter as well as a pulse
width modulation (PWM) controller to develop a supply
voltage. Typical operating frequency range is between
30kHz and 250kHz, depending on the cold cathode fluo-
rescent lamp (CCFL) and the transformer's characteris-
tics. The FAN7311B uses a new patent-pending phase-
shift control.
20-SOIC
Applications
„ LCD TV
„ LCD Monitor
www.DataSheet4U.com
Ordering Information
Part Number
FAN7311BM
FAN7311BMX
Package
20-SOIC
20-SOIC
Pb-Free
Yes
Yes
Operating Temperature Range
-25°C to 85°C
Packing Method
Rail
Tape & Reel
Protected by U.S. Patent: 5,652,479; 7,158,390.
© 2007 Fairchild Semiconductor Corporation
FAN7311B Rev. 1.0.0
www.fairchildsemi.com


FAN7311BM Datasheet
Recommendation FAN7311BM Datasheet
Part FAN7311BM
Description LCD Backlight Inverter Driver
Feature FAN7311BM; FAN7311B LCD Backlight Inverter Drive IC FAN7311B LCD Backlight Inverter Drive IC January 2007 Fe.
Manufacture Fairchild Semiconductor
Datasheet
Download FAN7311BM Datasheet




Fairchild Semiconductor FAN7311BM
Internal Block Diagram
RT
OSCILLATOR
max. 2V
min. 0.5V
CT
-
+
6μA
+
S_S
RT1
MRT1
Striking
OLP
Logic
S_S
Output
Control
Logic
Output
Driver
Output
Driver
EA_OUT
ADIM
EA_IN
+ Error Amp.
-
Solr 105μA
UVLO
SET
QS
2.5V
QR
CLR
Solr
1.4μA
+
VOLP+α
-
VOLP
UVLO 2.5V 1.5V
+
- 2V
max. 2V
Sburst 85μA
Va+α
BCT
BDIM
min. 0.5V
-
Positive
dimming polarity
+
Sburst
Voltage
Reference
&
Internal
Bias
AGND
UVLO
2.5VREF
VIN
+
-
+
- 1.4V
UVLO 5V
OUTA
OUTB
PGND
OUTC
OUTD
OLP
OLR
REF
ENA
VIN
FAN7311B Rev.00
Figure 1. Functional Block Diagram of FAN7311B
© 2007 Fairchild Semiconductor Corporation
FAN7311B Rev. 1.0.0
2
www.fairchildsemi.com



Fairchild Semiconductor FAN7311BM
Pin Assignments
RT1 OUTB OUTA
20
19
18
VIN PGND OUTC OUTD CT
17
16
15
14
13
RT BCT
12
11
FAN7311B
1
OLP
2
OLR
3
ENA
4
S_S
5
GND
6
REF
7
8
9
10
ADIM BDIM EA_IN EA_OUT
FAN7311B Rev. 00
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
1
2
3
4
5
6
7
8
9
10
Name
OLP
OLR
ENA
S_S
GND
REF
ADIM
BDIM
EA_IN
EA_OUT
Description
Open-Lamp Protection
Open-Lamp Regulation
Enable Input
Soft-Start
Analog Ground
2.5V Reference Voltage
Analog Dimming Input
Burst Dimming Input
Error Amplifier Input
Error Amplifier Output
Pin #
11
12
13
14
15
16
17
18
19
20
Name
BCT
RT
CT
OUTD
OUTC
PGND
VIN
OUTA
OUTB
RT1
Description
Burst Dimming Timing Capacitor
Timing Resistor
Timing Capacitor
NMOSFET Drive Output D
PMOSFET Drive Output C
Power Ground
Supply Voltage
PMOSFET Drive Output A
NMOSFET Drive Output B
Striking Frequency Resistor
© 2007 Fairchild Semiconductor Corporation
FAN7311B Rev. 1.0.0
3
www.fairchildsemi.com







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