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APW7136C

Anpec
Part Number APW7136C
Manufacturer Anpec
Description Step-Up Converter
Published Aug 6, 2008
Detailed Description APW7136A/B/C 1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs Features • Wide Input Voltage from 2.7V to ...
Datasheet PDF File APW7136C PDF File

APW7136C
APW7136C

Overview
APW7136A/B/C 1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs Features • Wide Input Voltage from 2.
7V to 6V • 0.
25V Reference Voltage • Fixed 1MHz Switching Frequency • High Efficiency up to 87% www.
DataSheet4U.
com • 100Hz to 100KHz PWM brightness control frequency General Description The APW7136A/B/C is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 8 white LEDs in series.
The series connection allows the LED current to be identical for uniform brightness.
Its low on-resistance of NFET and feedback voltage reduce power loss and achieves high efficiency.
Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply.
The OVP pin monitors the output voltage and stop switching if exceeds the over-voltage threshold.
An internal soft-start circuit eliminates the inrush current during start-up.
The APW 7136A/B/C also integrates under-voltage lockout, over-temperature protection and current limit circuits.
The APW7136/A/B/C is available in a SOT-23-6 package.
• • • • • • Open-LED Protection Under Voltage Lockout Protection Over Temperature Protection <1µA Quiescent Current during Shutdown SOT-23-6 Package Lead Free Available (RoHS Compliant) Applications • • • • White LED Display Backlighting Cell Phone and Smart Phone PDA, PMP, MP3 Digital Camera Simplified Application Circuit VIN C1 4.
7µF 2 L1 22µH 6 VIN GND EN LX OVP FB 1 5 3 R1 12Ω C2 1µF VOUT Pin Configuration SOT-23-6 Top View LX 1 GND 2 FB 3 6 VIN 5 OVP 4 EN Up to 8 WLEDs OFF ON 4 Ordering and Marking Information APW7136 Lead Free Code Handling Code Temperature Range Package Code OVP Voltage Code OVP Voltage Code A: 20V B: 28V C: 35V Package Code C : SOT-23-6 Operating Ambient Tempe rature Range I : -40 to 85 oC Handling Code TR : Tape & Reel Le ad Free Code L : Lead Free Device APW7136YCI : CFYX Y - OVP Voltage Code X - Date Code Note: ANPEC lead-free product...


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