PMP10596 Reference Design

Texas Instruments

24V Input 700mA Output Buck Regulator LED Driver - Reference Design

Description

The PMP10596 reference design is an LED driver based on SIMPLE SWITCHER® LM46002 buck regulator. The driver board takes 24V +/-25% input voltage and supplies700mA output current to drive up to 4 LEDs in series. The LM46002 is a 60V: 2A synchronous buck regulator with integrated FETs: and in this design it is configured as a high efficiency constant current converter. This is accomplished by using the voltage across a current sense resistor as the feedback signal. To reduce the sense resistor power loss: a 2V voltage reference is used to bias the FB pin via a resistor network: and: as a result: the equivalent feedback reference voltage becomes 0.35V: lower than the 1V feedback of the LM46002. The reference board employs 3 dimming schemes: which allows the output current to be adjusted via the potentiometer: an analog voltage or a PWM signal. It also offers easy and flexible control to dim the LED brightness and adds output overvoltage protection from LED open-circuit failure.

Features
  • • 24V +/-25% input voltage range: drive up to 4 LEDs• 94% efficiency driving 4 LEDs• Simple voltage bias circuit to reduce sense resistor lost • 3 flexible dimming options• LED open circuit protection• This circuit board is tested: and the design files and test report are included.
Applications
Product Categories
  • Power management

Parts

Part Number Name Companion Part
LM4040-N LM4040-N Datasheet

Bill Of Materials

Download the bill of materials for PMP10596 Download

Schematic

Quickly understand overall system functionality.

Download the schematic for PMP10596

Test Data

Get results faster with test and simulation data that's been verified.

Download the test file for PMP10596

Other Documents

Title Updated Type Size (KB)
PMP10596 Gerber 27 Jan 2015 ZIP 286
PMP10596 PCB 27 Jan 2015 PDF 526
PMP10596 BOM 27 Jan 2015 PDF 92
PMP10596 Schematic 27 Jan 2015 PDF 227