FAN5332A

FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch

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FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch

August 2005

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: 1 A Cycle-by-Cycle Current Limit Over-Voltage Protection Fixed -Frequency PWM Operation Soft Start Internal Compensation Thermal Shutdown 5-lead SOT-23 Package

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 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 current 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.

Applications
Cell Phones PDAs Handheld Equipment Display Bias LED Bias Flash LED

Typical Application
VIN CIN 10 F 5 1 R1 CF 82pF 2.7V to 5.5V L 6.8 H BAT54 COUT 2.2 F VOUT

FAN5332A

VIN

R2 ON OFF 4 SHDN GND 2

Figure 1. Typical Application Diagram

2004 Fairchild Semiconductor Corporation

www.fairchildsemi.com

FAN5332A Rev. 1.0.1