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FAN5332A Datenblatt(PDF) 1 Page - Fairchild Semiconductor

Teilenummer FAN5332A
Bauteilbeschribung  High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch
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Hersteller  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

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©2004 Fairchild Semiconductor Corporation
1
www.fairchildsemi.com
August 2005
FAN5332A Rev. 1.0.1
FAN5332A
High Efficiency, High Current Serial LED Driver and OLED
Supply with 30V 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
■ Over-Voltage Protection
■ Fixed -Frequency PWM Operation
■ Soft Start
■ Internal Compensation
■ Thermal Shutdown
■ 5-lead SOT-23 Package
Applications
■ Cell Phones
■ PDAs
■ Handheld Equipment
■ Display Bias
■ LED Bias
■ Flash LED
Description
The FAN5332A is an 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 switch-
ing 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 cir-
cuitry.
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 FAN5332A is available in a 5-lead
SOT23 package.
Typical Application
Figure 1. Typical Application Diagram
SHDN
VIN
VOUT
R1
R2
GND
VIN
FB
SW
CF
CIN
6.8µH
1
3
2
4
5
10
µF
82pF
COUT
L
BAT54
2.2
µF
2.7V to 5.5V
ON
OFF


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