TLD5045EJ_15 Datasheet, PDF (3/30 Pages) Infineon Technologies AG – 700mA High Integration - DC/DC Step-Down Converter

TLD5045EJ
Infineon® LITIX™ Power
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Overview
• Constant Current Generation
• Wide Input Voltage Range from 5V to 40V
• Peak Current Regulation
• Very low current consumption (<2uA) in Sleep Mode
• Integrated power transistor with low saturation voltage
• Integrated fast freewheeling diode
• Integrated load current sense resistor
• Integrated status pull down transistor
• Overtemperature Protection
PG-DSO-8 EP
• Switching frequency (typ. 200kHz) adjustable via external RC network
• External PWM Dimming Input
• Integrated PWM Dimming Engine
• Analog Dimming (output current adjustable via external low power resistor and possibility to connect PTC
resistor for LED protection during overtemperature conditions)
• Stable switching frequency due to fix OFF-time concept with VREC (supply voltage) feedforward
• Under- and Overvoltage shutdown with hysteresis
• Small thermally enhanced exposed heatslug SMD package
• Automotive AEC Qualified
• Green Product (RoHS) Compliant
Description
The TLD5045EJ is a highly integrated smart LED buck controller with built in protection functions. The main
function of this device is to drive single or multiple series connected LEDs efficiently from a voltage source
higher than the LED forward voltage by regulating a constant LED current. The constant current regulation is
especially beneficial for LED color accuracy and long LED lifetime. The built in freewheeling diode and
switching transistor with current sense requires less external components and saves system costs. High
flexibility is achieved by placing low power resistors to adjust output currents up to 700mA and the regulator
switching frequency (typ. 200kHz). An integrated PWM dimming engine provides a LED dimming function by
placing a simple RC network to GND. This feature is dedicated for decentralized light modules without micro
controller involvement. In addition to that an integrated status pull down transistor can be used to simulate
a minimum current flow for decentralized modules to avoid a wrong open load detection by a highside switch
located in the body control module (BCM).
Application
• Automotive LED driven Exterior Lighting: Brake, Tail, CHMSL, Daytime Running Light, Position Light
• Automotive LED driven Interior Lighting: Reading Light, Dome Light, Display Backlighting
Type
Device1
Data Sheet
Package
PG-DSO-8 EP
3
Marking
PG-DSO-8 EP
Revision 1.0, 2015-05-28