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PDF FAN5330 Data sheet ( Hoja de datos )

Número de pieza FAN5330
Descripción High Efficiency Serial LED Driver with 30V Integrated Switch
Fabricantes Fairchild Semiconductor 
Logotipo Fairchild Semiconductor Logotipo



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No Preview Available ! FAN5330 Hoja de datos, Descripción, Manual

August 2005
FAN5330
High Efficiency Serial LED Driver with 30V Integrated
Switch
Features
1.5MHz Switching Frequency
Low Noise
Adjustable Output Voltage
0.7W Output Power Capability
Low Shutdown Current: <1µA
Cycle-by-Cycle Current Limit
Low Feedback Voltage (110mV)
Over-Voltage Protection
Fixed-Frequency PWM Operation
Internal Compensation
Thermal Shutdown
5-Lead SOT23 Package
Applications
Cell Phones
PDAs
Handheld Equipment
Display Bias
LED Bias
Description
The FAN5330 is an LED driver that features fixed frequency
mode operation and an integrated FET switch. 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 FAN5330 is available in a 5-lead
SOT23 package.
Typical Application
VIN
CIN
2.2µF
L
6.8µH to 10µH
5
V
IN
SW 1
BAT54
0.47µF
COUT
ILED
3
FB
VOUT
ON
OFF
4 SHDN
2
GND
R
Figure 1. Typical Application Diagram
©2005 Fairchild Semiconductor Corporation
FAN5330 Rev. 1.0.1
1
www.fairchildsemi.com

1 page




FAN5330 pdf
Typical Performance Characteristics
TA = 25°C, CIN = 4.7µF, COUT = 0.47µF, L = 10µH, unless otherwise noted.
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
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)
Load Current vs. Input Voltage
25
VOUT = 15V
20
15
10
5
0
2
34
Input Voltage (V)
5
Efficiency vs. Input Voltage
100
VOUT = 9V
90
80
ILED = 35mA
70 ILED = 30mA
60 ILED = 20mA
ILDE = 10mA
50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
Start-Up Response
L = 10µH
CIN = 10µF
COUT = 1µF
VIN = 2.7V
Time (100µs/div)
Efficiency vs. Input Voltage
100
VOUT = 15V
90
80
ILED = 35mA
70 ILED = 30mA
ILED = 20mA
60
ILED = 10mA
50
2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
Input Voltage (V)
5 www.fairchildsemi.com
FAN5330 Rev. 1.0.1

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