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PT4303

Powtech
Part Number PT4303
Manufacturer Powtech
Description 1x/1.5x Auto-Adjust Charge Pump 4-Channel White LED Driver
Published Jan 19, 2015
Detailed Description PT4303 1x/1.5x Auto-Adjust Charge Pump 4-Channel White LED Driver with Two Dimming Modes GENERAL DESCRIPTION The PT430...
Datasheet PDF File PT4303 PDF File

PT4303
PT4303

Overview
PT4303 1x/1.
5x Auto-Adjust Charge Pump 4-Channel White LED Driver with Two Dimming Modes GENERAL DESCRIPTION The PT4303 is a 4-channel 1x/1.
5x auto-adjust charge pump white LED driver with two dimming modes.
Auto-adjust charge pump achieves high efficiency for Li-Ion battery supply.
The two LED dimming modes enable users to dim the four LEDs all together or individually.
Only a few external components (two flying capacitors and two filter capacitors at VIN and VOUT) are needed, which makes the PT4303 ideally suited for mobile applications.
The current through the LED can be set by an external resistor.
The four LEDs can be turned on and off individually or in a group of two to four through the two control terminals, which can also be used to dim the LEDs by applying PWM control signals.
Built-in soft-start circuit prevents the inrush current from the power supply during power on and 1x/1.
5x mode change.
The thermal shutdown and current limiter prevent the PT4303 from being damaged by a high-level current through it.
A shutdown current of less than 1uA makes the battery last longer.
The PT4303 is available in QFN-16 package.
FEATURES z 3V-5.
5V input voltage z 1x/1.
5x auto-adjust charge pump z Set LED current by external resistor z Dimming LED by PWM signal through 2 control terminal z LED fault detection z <3% current mismatch z No inductor z Less than 1uA shutdown current z Built-in soft-start and soft mode decision APPLICATIONS z Cell phones z Laptop computers and PDAs z Digital cameras z Small LCD displays ORDERING INFORMATION PACKAGE TEMPERATURE RANGE ORDERING PART NUMBER QFN-16（3x3） -40 oC to 85 oC PT4303EQFN Note: xxxxxX Assembly Factory Code Lot Number TYPICAL APPLICATION CIRCUIT C1 1uF C2 1uF TRANSPORT MEDIA Tape and Reel 3000 units MARKING PT4303 xxxxxX C1 1uF C2 1uF 3V to 5.
5V CIN 1uF Control bit 0-1 C1N C1P C2N C2P VIN VOUT EN CTRL0 CTRL1 GND LED1 LED2 LED3 LED4 ISET COUT 1uF RSET(24K) 3V to 5.
5V CIN 1uF Control bit 0-1 C1N C1P C2N...


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