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ACE714 Arkusz danych(PDF) 1 Page - ACE Technology Co., LTD.

Numer części ACE714
Szczegółowy opis  High Efficiency Low Noise PFM Step-up DC/DC Converter
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Producent  ACE [ACE Technology Co., LTD.]
Strona internetowa  http://www.ace-ele.com
Logo ACE - ACE Technology Co., LTD.

ACE714 Arkusz danych(HTML) 1 Page - ACE Technology Co., LTD.

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ACE714
                        Technology
High Efficiency Low Noise PFM Step-up DC/DC Converter
VER 1.2
1
 
Description
The ACE714 PFM step-up Converter drives white LEDs with a constant current to provide backlight in
cell phones, PDAs, and other handheld devices. It features allowing series connection of the white LEDs
so that the LED currents are identical for uniform brightness. An enable input can be pulsed repeatedly to
adjust LEDs brightness. The fast 500HKz to 2MHz operation frequency allows for smaller capacitor and
inductor. Fault condition protection uses cycle-by cycle current limiting to sense maximum inductor
current and over-voltage protection. The 0.2V low reference voltage minimized the power loss across the
current sense resistor.
The converter can operate from 2V to 6V, and capable of delivering maximum 200mA output current at
4-LEDs application with 3V input voltage is as low as 120uA. All of these features make ACE714 be
suitable for the portable devices, which are supplied by a single battery.
ACE714 is available in SOT-23-6 package that is PB free.
 
Features
Up to 24V Output Voltage
Wide Operation Range: 2V to 6V
Maximum 2MHz Operating Frequency
PWM Dimming Control
Shutdown Current <1uA
Current Limit Cycle-by-Cycle
Low Current Sense Threshold: 200mV
24V Over Output Voltage Protection
Compact SOT-23-6 Package
Application
Compact Back Light Module
Power Source for LED
Constant Current Source


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