9V - 32V input to -28V/1.5A negative output buck-boost LED current regulator

(ACTIVE) PMP6867

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


Description

This reference design uses the TPS40170 sync buck controller in a buck-boost converter to regulate the current in a series string of 6 to 8 LEDs (-28V) at up to 1.5A. Efficiency is greater than 93%. The output current can be adjusted with an external control voltage.

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


  




Parametrics
 PMP6867.1
(Output Voltage 1)
Vin (Min) (V)9
Vin (Max) (V)32
Vout (Nom) (V)-28
Iout (Max) (A)1.5
Output Power (W)42
Isolated/Non-IsolatedNon-Isolated
Input TypeDC
TopologyBuck Boost- Inverting
Buck Boost- 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
TLV271  550-uA/Ch 3-MHz Rail-to-Rail Output Operational Amplifier  Operational Amplifiers (Op Amps)  Sample & Buy View Design Kits & Evaluation Modules
TPS40170  4.5 V to 60 V Wide-Input Synchronous PWM Buck Controller  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 2699 15 Feb 2012 28
Design files (4)
Title Abstract Type Size (KB) Date Views
PDF 154 15 Feb 2012 15
ZIP 128 15 Feb 2012 11
PDF 28 15 Feb 2012 22
PDF 79 15 Feb 2012 37


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