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PT4301 Datasheet Preview

PT4301 Datasheet

1x/1.5x Auto-Adjust Charge Pump 4-Channel White LED Driver

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LED Driver
PT4301
1x/1.5x Auto-Adjust Charge Pump 4-Channel
White LED Driver With 3Dimming Modes
GENERAL DESCRIPTION
The PT4301 is a 4-channel 1x/1.5x auto-adjust charge pump white LED driver with three
dimming modes. Auto-adjust charge pump achieve high efficiency for Li-Ion battery supply.
Three LED dimming modes enable user to dimming 1 to 4 LED all together or separately. Few
external component (two flying capacitors, and two filter capacitors at VIN and VOUT) make
the PT4301 ideally suited for mobility application.
The current through the LED can be pre-set by external resistor. And the current can also be
regulated from 3mA to 25mA in 3mA step by the EN/SET pin, which is a digital interface to
enable, disable the chip and set the LED current. And which LED is on or off can be controlled
by 3 control terminals, so you can dim each LED by PWM control signals.
Built-in soft-start circuit prevents the inrush current from supply source during power on and
1x/1.5x mode change. Thermal shut down and current limiter prevent the PT4301 damaged by
the high-level current through it. Shut-down current less than 1uA make the battery time longer.
PT4301 is packaged with QFN-16.
FEATURES
3V-5.5V input voltage
1x/1.5x auto-adjust charge pump
Set LED current by external resistor
Programming 4-channel LED current up to 25mA with 8 levels through EN/SET pin
Dimming LED by PWM signal through 3 control terminal
LED fault detection
www.DataSheet4U.com <3% current mismatch
No inductor
Less than 1uA shut down current
Built-in soft-start and soft mode decision
APPLICATIONS
Cell Phones
Handheld Computers and PDAs
Digital Cameras
Small LCD Displays
Programmable current sink
TYPICAL APPLICATIONS




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PT4301 Datasheet Preview

PT4301 Datasheet

1x/1.5x Auto-Adjust Charge Pump 4-Channel White LED Driver

No Preview Available !

LED Driver
C1 1uF C2 1uF
3V to 5.5V
CIN 1uF
Control
bit 0-2
C1N C1P C2N C2P
VIN VOUT
LED1
PT4301
EN/SET
LED2
CTRL0
LED3
CTRL1
LED4
CTRL2 GND ISET
COUT
1uF
RSET(24K)
Figure 1. Li-Ion Driver for 4 White LEDs
www.DataSheet4U.com


Part Number PT4301
Description 1x/1.5x Auto-Adjust Charge Pump 4-Channel White LED Driver
Maker ETC
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PT4301 Datasheet PDF






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