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PDF FAN5333A Data sheet ( Hoja de datos )
| Número de pieza | FAN5333A | |
| Descripción | High Current Serial LED Driver | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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August 2005
FAN5333A/FAN5333B
High Efficiency, High Current Serial LED Driver with 30V
www.datasheet4u.com
Integrated Switch
Features
■ 1.5MHz Switching Frequency
■ Low Noise
■ Adjustable Output Voltage
■ Up to 1.5A Peak Switch Current
■ 1.5W Output Power Capability
■ Low Shutdown Current: <1µA
■ Cycle-by-Cycle Current Limit
■ Low Feedback Voltage
■ Over-Voltage Protection
■ Fixed-Frequency PWM Operation
■ Internal Compensation
■ FAN5333A has 110mV Feedback Voltage
■ FAN5333B has 315mV Feedback Voltage
■ Thermal Shutdown
■ 5-Lead SOT23 Package
Applications
■ Cell Phones
■ PDAs
■ Handheld Equipment
■ Display Bias
■ LED Bias
■ Flash LED
Description
The FAN5333A/FAN5333B is a general purpose LED driver that
features fixed frequency mode operation and an integrated FET
switch. The device’s high output power makes it suitable to drive
flash LEDs in serial connections. This device is designed to
operate at high switching frequencies in order to minimize
switching noise measured at the battery terminal of hand-held
communications equipment. Quiescent current in both normal
and shutdown mode is designed to be minimal in order to
extend battery life. Normal or shutdown mode can be selected
by a logic level shutdown circuitry.
The low ON-resistance of the internal N-channel switch ensures
high efficiency and low power dissipation. A cycle-by-cycle cur-
rent limit circuit keeps the peak current of the switch below a
typical value of 1.5A. The FAN5333A/FAN5333B is available in
a 5-lead SOT23 package.
Typical Application
VIN
4.7µF
to
10µF
CIN
L
6.8µH to 10µH
5
VIN
SW 1
BAT54
0.1µF
to
2.2µF
COUT
ILED
ILED1
VOUT
ILED2
3
FB
ON
OFF
4 SHDN
2
GND
R R1
R2
Figure 1. Typical Application Diagram
©2005 Fairchild Semiconductor Corporation
FAN5333A/FAN5333B Rev. 1.0.1
1
www.fairchildsemi.com
1 page  
Typical Performance Characteristics
TA = 25°C, CIN = 4.7µF, COUT = 0.47µF, L = 10µH, unless otherwise noted.
www.datasheet4u1.c0o0 m
90
Efficiency vs. Input Voltage
VOUT = 9V
80
ILED = 40mA
70
ILED = 30mA
ILED = 10mA
60
ILED = 20mA
50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage(V)
Efficiency vs. Input Voltage
100
VOUT = 15V
90
80
ILED = 40mA
70 ILED = 30mA
60 ILED = 20mA
ILED = 10mA
50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage(V)
Maximum Load Current vs. Input Voltage
300
ILED<5%
250 CIILNE=D<150%µF
CCIONU=T 1=01µµFF
200 COUT = 1µF
TA = 25°C
150
100 TA = -40°C
50
VOUT = 15V
TA = 85°C
0
2
34
Input Voltage (V)
5
LED Current vs Temperature
10.8
10.6
10.4
VIN = 5.5V
VIN = 2.2V
VOUT = 15V
10.2
10.0
VIN = 3.6V
9.8
9.6
-40 -20 0 20 40 60 80
Temperature (°C)
Maximum Load Current vs.Input Voltage
200
150
∆ILED<5%
CIN = 10µF
COUT = 1µF
100
VOUT = 9.3V
VOUT = 12.3V
50
0
2.0
VOUT = 14.2V
2.5 3.0 3.5
Input Voltage (V)
4.0
SW Frequency vs Temperature
2.0
VOUT = 15V
1.8
VIN = 3.6V
1.6 VIN = 5.5V
1.4 VIN = 2.2V
1.2
-40 -20
0
20 40 60 80
Temperature (°C)
FAN5333A/FAN5333B Rev. 1.0.1
5
www.fairchildsemi.com
5 Page 
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™
FAST
ActiveArray™ FASTr™
Bottomless™ FPS™
www.datasheeBt4uui.lcdomit Now™ FRFET™
CoolFET™
GlobalOptoisolator™
CROSSVOLT™ GTO™
DOME™
HiSeC™
EcoSPARK™ I2C™
E2CMOS™
i-Lo™
EnSigna™
ImpliedDisconnect™
FACT™
IntelliMAX™
FACT Quiet Series™
Across the board. Around the world.™
The Power Franchise
Programmable Active Droop™
ISOPLANAR™
LittleFET™
MICROCOUPLER™
MicroFET™
MicroPak™
MICROWIRE™
MSX™
MSXPro™
OCX™
OCXPro™
OPTOLOGIC
OPTOPLANAR™
PACMAN™
POP™
Power247™
PowerEdge™
PowerSaver™
PowerTrench
QFET
QS™
QT Optoelectronics™
Quiet Series™
RapidConfigure™
RapidConnect™
µSerDes™
SILENT SWITCHER
SMART START™
SPM™
Stealth™
SuperFET™
SuperSOT™-3
SuperSOT™-6
SuperSOT™-8
SyncFET™
TinyLogic
TINYOPTO™
TruTranslation™
UHC™
UltraFET
UniFET™
VCX™
Wire™
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TOANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOTASSUMEANY LIABILITY
ARISING OUT OF THEAPPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEYANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTENAPPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or
2. A critical component is any component of a life
systems which, (a) are intended for surgical implant into
support device or system whose failure to perform can
the body, or (b) support or sustain life, or (c) whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system, or to affect its safety or
with instructions for use provided in the labeling, can be
reasonably expected to result in significant injury to the
effectiveness.
user.
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
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete
FAN5333A/FAN5333B Rev. 1.0.1
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
Rev. I16
11 www.fairchildsemi.com
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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet FAN5333A.PDF ] | |
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