TPS92519-Q1 Evaluation Module User's Guide
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1 Introduction
The TPS92519EVM-169 evaluation module (EVM) helps designers evaluate the operation and performance of the TPS92519-Q1 buck switching regulator designed for high-current LED drive applications. The TPS92519-Q1 is designed to control two drivers of high-brightness light-emitting diodes (LED) and features a wide input voltage range (5.5 V to 65 V), PWM dimming capability, analog dimming capability, and input undervoltage protection.
2 Warnings and Cautions
Observe the following precautions when using the TPS92519EVM-169.
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| Caution! Do not leave EVM powered when unattended. |
| HOT SURFACE: |
 |
| Caution Hot Surface! Contact may cause burns. Do not touch. Please take the proper |
| precautions when operating. |
| HIGH VOLTAGE: |
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| Danger High Voltage! Electric shock possible when connecting board to live wire. Board must |
| be handled with care by a professional. For safety, use of isolated test equipment with |
| overvoltage and overcurrent protection is highly recommended. |
When choosing
your LED component (not included with this EVM), the end user must consult the
LED data sheet supplied by the LED manufacturer to identify the EN62471 Risk
Group Rating and review any potential eye hazards associated with the LED
chosen. Always consider and implement the use of effective light filtering and
darkening protective eye wear and be fully aware of surrounding laboratory-type
set-ups when viewing intense light sources that can be required to minimize or
eliminate such risks in order to avoid accidents related to temporary
blindness.
3 Description
This user's guide describes the specifications, board connection descriptions, characteristics, operation, and use of the TPS92519-Q1, dual 2.0-A synchronous buck LED driver evaluation module (TPS92519EVM-169). The TPS92519-Q1 device implements an adaptive on-time average current mode control and is designed to be compatible with shunt FET dimming techniques and LED matrix manager-based dynamic beam headlamps. The adaptive on-time control provides near constant switching frequency that can be set to 385/435 kHz or 2/2.1 MHz. Inductor current sensing and closed-loop feedback enables better than ±4% accuracy over wide input voltage, output voltage and ambient temperature range.
TPS92519EVM-169 provides a high-brightness LED driver that is designed to operate with an input voltage in the range of 5.5 V to 65 V. The EVM is set up for a default output current of 2 A for an LED stack between approximately 3 V and nearly 60 V operating at 385/435 kHz. The TPS92519-Q1 helps provide high efficiency, fast PWM dimming, and accurate wide-range analog dimming.