FAN7547AMXC [FAIRCHILD]
LCD Backlight Inverter Drive IC; LCD背光逆变器驱动IC
| 型号： | FAN7547AMXC |
| 厂家： | 
FAIRCHILD SEMICONDUCTOR |
| 描述： | LCD Backlight Inverter Drive IC |
| 文件： | 总9页 (文件大小：349K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
February 2007
FAN7547A
LCD Backlight Inverter Drive IC
Features
Description
Backlight Lamp Ballast and Soft Dimming
Reduced Number of Components
Wide Range of Operating Voltage (6 to 30V)
Precision Voltage Reference Reduced to 3.4%
Low Standby Current (Typically 50µA)
Soft-Start Function
The FAN7547A provides all control functions for a
current-fed, push-pull, self-oscillation type converter and
also contains a pulse-width-modulated (PWM) controller
to develop a supply voltage. Typical operating frequency
range is from 30kHz to 100kHz, depending on the cold
cathode fluorescent lamp (CCFL) and the transformer's
characteristics.
PWM Control
Analog, Mixed, and PWM Dimming Function
P-Channel MOSFET Drive
14-SOP
Open-Lamp Protections (OLP)
Shutdown Protections (SDP)
14-Pin SOP
Ordering Information
Part Number
FAN7547AM
FAN7547AMX
Package
Pb-Free
Operating Temperature Range Packing Method
Tube
-25°C ~ +85°C
14-SOP
Yes
Tape & Reel
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
Internal Block Diagram
OUT
VCC1
VZ
Vref
SW
Vref
3V
2μA
Output
Driver
Q
R
S
Internal
Bias
VZ
SDP
VCC
3.7V
Comparator1
OSC
COMP
FB
UVLO
5V
VCC
S/S
40μA
Comparator2
1.3V
Comparator3
Buffer
Amplifier
0.1V
RCT
OLP
Oscillator
120μA
7V
Comparator4
Vref
Vb
Va
Vref
Comparator5
Dimming Control and Mode Selection Block
50kΩ
Vms
VDS
2V
Analog
PWM
Mixed
50kΩ
Comparator6
1V
GND
Full Lighting when VDS = 3V
FAN7547A Rev. 1.01
Figure 1. Functional Block Diagram of FAN7547A
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
2
Pin Configuration
OUT
14
VCC
13
1
VCC
12
OSC
11
S/S
10
COMP
9
FB
8
FAN7545A
1
2
3
4
5
6
7
GND
VDS
Vref
Vms
RCT
OLP
SDP
FAN7547A Rev. 1.00
Figure 2. Pin Configuration (Top View)
Pin Definitions
Pin #
1
Name
I/O
Description
GND
VDS
Ground
2
I
O
I
Dimming Voltage Input
Reference Voltage
Dimming Mode Selection
Burst Dimming Frequency Set
Open-Lamp Protection
Shutdown Protection
Feedback Input
3
Vref
4
Vms
5
RCT
OLP
SDP
FB
6
I
I
I
7
8
9
COMP
S/S
Error Amplifier Output
Soft-Start
10
11
12
13
14
OSC
VCC
I
I
Main Ct
Supply Voltage
VCC1
I
Output Drive Source Voltage
Output Drive
OUT
O
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
3
Absolute Maximum Ratings
Stresses exceeding the absolute maximum ratings may damage the device. The device may not function or be
operable above the recommended operating conditions and stressing the parts to these levels is not recommended. In
addition, extended exposure to stresses above the recommended operating conditions may affect device reliability.
The absolute maximum ratings are stress ratings only. -25°C ≤ TA ≤ 85°C and VCC=10V unless otherwise specified.
Symbol
VCC
TJ
Parameter
Value
6 to 30
150
Unit
V
Supply Voltage
Operating Junction Temperature
Operating Temperature Range
Storage Temperature Range
Power Dissipation
°C
°C
°C
W
TA
-25 to 85
-65 to 150
0.5
TSTG
PD
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
4
Electrical Characteristics
Unless otherwise noted, these specifications apply to the operating ambient temperatures for the FAN7547A with
-25°C ≤ TA ≤ 85°C and VCC = 10V.
Symbol
Parameter
Conditions
Min. Typ. Max. Unit
UVLO SECTION
VST
IST
Start Voltage
Start Current
Operating Current
4.9
5.4
50
5.9
200
8.0
V
VCC = 4.5V
7V < VCC< 30V
μA
mA
ICC
5.5
REFERENCE SECTION
Vref
Reference Voltage
TJ = 25°C, Iref = 0mA, 7V < VCC< 30V 2.95 3.05 3.15
V
SOFT-START SECTION
ISS
Soft -Start Charge Current
PWM Discharge Current
CSS = 4V
CSS = 4V
33
48
40
70
47
85
μA
μA
Ipwm
OSCILLATOR SECTION
fpwm
Vpwmh
VpwmI
Operating Frequency
7V < VCC < 30V
170
200
1.3
0.1
230
Hz
V
Osc High Voltage
Osc Low Voltage
V
DIMMING SECTION
Va
0
3
V
V
V
V
V
V
Analog Dimming Range
Vms > 2V
Vb
Va
Vb
Va
Vb
3
2.1
0
2.5
2.9
2.5
3.0
3
PWM Dimming Range
Mixed Dimming Range
Vms < 1V
1.2
0
Vms =1.5V or open
MODE SELECTION
Vsa
Vsp
Vsc
Analog Dimming Select Voltage
1.5
0.7
1.2
2.0
1.0
1.5
2.5
1.3
1.8
V
V
V
PWM Dimming Select Voltage
Mixed Dimming Select Voltage
OPEN-LAMP PROTECTION
Vopen
Open-Lamp Detect Voltage
7V < VCC < 30V
7V < VCC < 30V
2.5
3.0
3.5
V
SHUTDOWN PROTECTION
Isd
Shutdown Current
Shutdown Voltage
1
2
3
μA
Vsd
2.5
3.0
3.5
V
OUTPUT SECTION
VOH
VOL
tr
Output High Voltage
VCC = 10V
VCC = 10V
VCC = 10V
VCC = 10V
8
9
10
1
V
V
Output Low Voltage
Rising Time
120
60
200
120
ns
ns
tf
Falling Time
Output Voltage with UVLO
Activated
VUV
VCC = 4V
2
4
V
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
5
Typical Characteristics
6
5
4
3
2
1
0
5.75
5.50
5.25
5.00
0
5
10
15
20
25
30
-20
0
20
40
60
80
100
VCC [V]
Temperature [°C]
Figure 3. Start Voltage
Figure 4. Start Voltage vs. Temperature
120
3.15
3.10
3.05
3.00
2.95
90
60
30
0
-20
0
20
40
60
80
100
-15
0
15
30
45
60
75
90
Temperature [°C]
Temperature [°C]
Figure 5. Output vs. Temperature
Figure 6. Reference Voltage vs. Temperature
230
45
42
39
36
33
220
210
200
190
180
170
-20
0
20
40
60
80
100
-20
0
20
40
60
80
100
Temperature [°C]
Temperature [°C]
Figure 7. Soft-Start Charge Current vs. Temperature
Figure 8. Operating Frequency vs. Temperature
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
6
Typical Characteristics (Continued)
2.8
3.4
3.2
3.0
2.8
2.6
2.4
2.0
1.6
1.2
-20
0
20
40
60
80
100
-20
0
20
40
60
80
100
Temperature [°C]
Temperature [°C]
Figure 9. Protection Current vs. Temperature
Figure 10. Protection Voltage vs. Temperature
10.0
0.8
9.6
9.2
8.8
8.4
8.0
0.4
0.0
-0.4
-20
0
20
40
60
80
100
-20
0
20
40
60
80
100
Temperature [°C]
Temperature [°C]
Figure 11. Output High Voltage vs. Temperature
Figure 12. Output Low Voltage vs. Temperature
4.0
3.5
3.0
2.5
2.0
-20
0
20
40
60
80
100
Temperature [°C]
Figure 13. Output Voltage with UVLO Activated vs.
Temperature
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
7
Package Dimensions
14-SOP
Dimensions are in millimeters unless otherwise noted.
Figure 14. 14-Lead Small Outline Package (SOP)
© 2005 Fairchild Semiconductor Corporation
FAN7547A Rev. 1.0.3
www.fairchildsemi.com
8
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an
exhaustive list of all such trademarks.
ACEx®
PowerTrench®
Programmable Active Droop™
QFET®
TinyLogic®
TINYOPTO™
TinyPower™
TinyWire™
TruTranslation™
μSerDes™
UHC®
UniFET™
VCX™
Wire™
HiSeC™
i-Lo™
Across the board. Around the world.™
ActiveArray™
Bottomless™
Build it Now™
CoolFET™
ImpliedDisconnect™
IntelliMAX™
ISOPLANAR™
MICROCOUPLER™
MicroPak™
MICROWIRE™
MSX™
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
ScalarPump™
SMART START™
SPM®
CROSSVOLT™
CTL™
Current Transfer Logic™
DOME™
MSXPro™
OCX™
E2CMOS™
EcoSPARK®
EnSigna™
SuperFET™
OCXPro™
OPTOLOGIC®
OPTOPLANAR®
PACMAN™
POP™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
FACT Quiet Series™
FACT®
FAST®
TCM™
The Power Franchise®
™
Power220®
Power247®
PowerEdge™
PowerSaver™
FASTr™
FPS™
FRFET®
TinyBoost™
TinyBuck™
GlobalOptoisolator™
GTO™
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS
HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE
APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER
ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S
WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems 2. A critical component in any component of a life support,
which, (a) are intended for surgical implant into the body or
(b) support or sustain life, and (c) whose failure to perform
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to
result in a significant injury of the user.
device, or system whose failure to perform can be
reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In Design
This datasheet contains the design specifications for product
development. Specifications may change in any manner without notice.
Preliminary
First Production
Full Production
Not In Production
This datasheet contains preliminary data; supplementary data will be
published at a later date. Fairchild Semiconductor reserves the right to
make changes at any time without notice to improve design.
No Identification Needed
Obsolete
This datasheet contains final specifications. Fairchild Semiconductor
reserves the right to make changes at any time without notice to improve
design.
This datasheet contains specifications on a product that has been
discontinued by Fairchild Semiconductor. The datasheet is printed for
reference information only.
Rev. I23
© 2007 Fairchild Semiconductor Corporation
www.fairchildsemi.com
相关型号：
FAN7554DTF
Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, PDSO8, SOP-8
FAIRCHILD
©2020 ICPDF网 联系我们和版权申明