Fairchild Fan5332A User's Guide
Summary
The FAN5332A is a high-efficiency, high-current serial LED driver and OLED supply featuring a 30V integrated switch. Designed for handheld communications equipment, this compact 5-lead SOT-23 device delivers up to 1.5A peak current and adjustable output voltage, making it ideal for driving flash LEDs and display bias applications.
Page 1 Text Content
FA 5332A ig ffi cien cy, H ig rren t S erial L river an ly w ith 30V In teg rated itch
August 2005
FAN5332A High Efficiency, High Current Serial LED Driver and OLED Supply with 30V Integrated Switch Features Description 1.5MHz Switching Frequency The FAN5332A is an LED driver that features fixed frequency
mode operation and an integrated FET switch. The device’s
Low Noise
high output power makes it suitable to drive flash LEDs in serial
Adjustable Output Voltage
connections. This device is designed to operate at high switch-
Up to 1.5A Peak Switch Current
ing frequencies in order to minimize switching noise measured
1.5W Output Power Capability
at the battery terminal of hand-held communications equipment.
Low Shutdown Current: <1µA FA Quiescent current in both normal and shutdown mode is
designed to be minimal in order to extend battery life. Normal or
Cycle-by-Cycle Current Limit
shutdown mode can be selected by a logic level shutdown cir-
Over-Voltage Protection
cuitry.
Fixed -Frequency PWM Operation
The low ON-resistance of the internal N-channel switch ensures
Soft Start
high efficiency and low power dissipation. A cycle-by-cycle cur-
Internal Compensation
rent limit circuit keeps the peak current of the switch below a
Thermal Shutdown
typical value of 1.5A. The FAN5332A is available in a 5-lead
5-lead SOT-23 Package SOT23 package.
Applications Cell Phones PDAs Handheld Equipment Display Bias LED Bias Flash LED
Typical Application
BAT54
2.7V to 5.5V
CIN 6.8µH COUT 10µF 2.2µF
R1 CF
SHDN GND
Figure 1. Typical Application Diagram
©2004 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5332A Rev. 1.0.1
Page Summary Contents For Fairchild Fan5332A User's Guide
Manual Details
| Brand | Fairchild |
|---|---|
| Pages | 9 |
| File Size | 549.63 KB |
| Published | June 15, 2026 |
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Frequently Asked Questions
What is the input voltage range for the FAN5332A?
The input voltage range is 2.7V to 5.5V.
How do I enable the device?
Apply a logic HIGH (>1.5V) to the SHDN pin to enable; logic LOW (<0.5V) disables it.
What is the maximum output voltage?
The maximum output voltage is 30V.
What is the quiescent current in shutdown mode?
The shutdown current is less than 1µA (typical 0.1µA).
What is the function of the FB pin?
The FB pin is the feedback node that connects to an external voltage divider to set the output voltage.