Texas Instruments TPS92512EVM-001 User Manual

TPS92512EVM-001 High-Current Buck Regulator With
Analog and PWM Dimming for High Brightness LEDs
1 Introduction
The TPS92512EVM-001 evaluation module (EVM) helps designers evaluate the operation and
performance of the TPS92512HV buck switching regulator designed for high-current LED-drive
applications. The TPS92512HV device is designed to control the drive of high-brightness light emitting
diodes and features a wide input voltage range (4.5 V to 60 V), PWM dimming capability, analog dimming
capability, adjustable/syncable switching frequency, and input undervoltage protection.
2 Warnings
Observe the following precautions when using the TPS92512EVM-001.
DO NOT STARE DIRECTLY INTO THE LED LIGHT SOURCE. Intense
light sources have a high-secondary blinding effect. A temporary
reduction in visual acuity and afterimages can occur, leading to
irritation,
accidents—depending on the situation. Always consider the use of
light filtering and darkening protective eyewear and be fully aware
of surrounding laboratory-type set-ups when viewing intense light
sources to minimize or eliminate such risks in order to avoid
accidents related to temporary blindness.
Do not stare at the operating LED (Risk Group1 [RG1]). See
IEC32471-1 ed1.0:2009-08 for risk group definitions.
3 Description
The TPS92512EVM-001 provides a high-brightness LED driver based on the TPS92512HV buck
regulator. It is designed to operate with an input voltage in the range of 12 V to 48 V. The EVM is set up
for a default output current of 1.5 A for an LED stack between approximately 5 V and 25 V. The
TPS92512 device helps provide high efficiency, good line regulation, low output ripple, and a wide
dimming range.
3.1 Typical Applications
This converter design describes an application of the TPS92512HV device as an LED driver with the
specifications described in
voltage range refer to the TPS92512 data sheet.
SLVUAC9A – February 2015 – Revised July 2015
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WARNING
annoyance, visual
WARNING
Table 1. For applications with a different input voltage range or different output
TPS92512EVM-001 High-Current Buck Regulator With Analog and PWM
Copyright © 2015, Texas Instruments Incorporated
SLVUAC9A – February 2015 – Revised July 2015
impairment, and
Dimming for High Brightness LEDs
User's Guide
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