Datasheet4U Logo Datasheet4U.com

PT4105 - Step-Down Power LED Driver

Datasheet Summary

Features

  • The PT4105 is a step-down DC/DC converter designed to operate as a high current LED driver. The PT4105 uses a voltage mode, fixed frequency architecture that guarantees stable operation over wide range of supply voltages and load conditions. The PT4105 senses the output current by measuring the voltage across an external resistor in series with the high current LED. This voltage is then fed back to the PT4105 to control the PWM signal that drives the switching device to achieve accurate current.

📥 Download Datasheet

Datasheet preview – PT4105

Datasheet Details

Part number PT4105
Manufacturer Powtech
File Size 416.71 KB
Description Step-Down Power LED Driver
Datasheet download datasheet PT4105 Datasheet
Additional preview pages of the PT4105 datasheet.

📁 Similar Datasheet

  • PT4102 - Step-up White LED Driver (Micro Bridge Technology)
  • PT4110 - Side View and Thin Flat Type Phototransistors (Sharp Electrionic Components)
  • PT4110F - Side View and Thin Flat Type Phototransistors (Sharp Electrionic Components)
  • PT4115 - 30V / 1.2A high dimming ratio LED constant current driver (UMW)
  • PT4115B - Continuous inductor current conduction mode drop Constant current source (LIZE)
  • PT4115C - 500mA high light ratio LED constant current driver (LIZE)
  • PT4115D - Built-in MOS tube 1.2A high power LED constant current driver (HOTCHIP)
  • PT4120 - Side View and Thin Flat Type 2-Phase Output Phototransistor (Sharp Electrionic Components)
  • PT4141 - 100V/2A Single-Stage Linear LED Driver (CR Micro)
  • PT42C - 4-Bit Programmable Delay Line (Kappa Networks)
Other Datasheets by Powtech
  • PT4101 - White LED Step-Up Converter
  • PT4103 - White LED Step-Up Converter
  • PT4107 - Universal High Brightness LED Driver
  • PT4110 - High Efficiency White LED Driver
  • PT4112 - WLED Driver
  • PT4113 - 480mA LED backlight
  • PT4115 - 1.2A Step-down High Brightness LED Driver
  • PT4115B - 40V/1.2A Buck High Dimming Ratio LED Constant Current Driver

Full PDF Text Transcription

Click to expand full text
PT4105 Step-Down Power LED Driver GENERAL DESCRIPTION FEATURES The PT4105 is a step-down DC/DC converter designed to operate as a high current LED driver. The PT4105 uses a voltage mode, fixed frequency architecture that guarantees stable operation over wide range of supply voltages and load conditions. The PT4105 senses the output current by measuring the voltage across an external resistor in series with the high current LED. This voltage is then fed back to the PT4105 to control the PWM signal that drives the switching device to achieve accurate current regulation. The low 200mV feedback voltage greatly reduces the power dissipation on the external current sensing resistor and therefore improves the overall efficiency.
Published: |