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

(ACTIVE) PMP10596

Description & Features

Technical Documents

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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.


View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.


  




Parametrics
 PMP10596.1
(Output Voltage 1)
Vin (Min) (V)18
Vin (Max) (V)30
Vout (Nom) (V)16
Iout (Max) (A).7
Output Power (W)11.2
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck- Synchronous

TI Devices (2)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM4040-N  Precision Micropower Shunt Voltage Reference  Voltage Reference  Sample & Buy View Design Kits & Evaluation Modules
LM46002  3.5V to 60V, 2A Synchronous Step-Down Voltage Converter  Step-Down (Buck)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

User guides (1)
Title Abstract Type Size (KB) Date Views
PDF 448 27 Jan 2015 40
Design files (4)
Title Abstract Type Size (KB) Date Views
ZIP 286 27 Jan 2015 33
PDF 526 27 Jan 2015 9
PDF 92 27 Jan 2015 8
PDF 227 27 Jan 2015 40


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