Texas Instruments TPS61196EVM-600, Руководство пользователя

Страница: 4 / 19

Operation
www.ti.com
3 Operation
This section contains non-dimming and PWM-dimming operation instructions, and EVM test results.
3.1 Non-Dimming Operation (Default Configuration)
For non-dimming operation of the TPS61196EVM-600; J5, JP2, and JP8 should be properly configured as
shown in
Figure 1 . The configuration for JP1 and JP3 to JP7 is determined by the specific application. In
this default configuration, the device will power up when power is applied.
3.2 PWM-Dimming Operation
Remove the jumper on JP8 of the default configuration, connect the appropriately configured function
generator output between JP8-pin2 and JP8-pin3 (for GND connection) to control PWM1–PWM6 together,
or connect six independent PWM signals between J5-pin2, 4, 6, 8, 10, 12 and GND to control
PWM1–PWM6. The PWM signal's duty cycle is directly proportional to the regulated current.
3.3 Test Results
Figure 2 and Figure 3 provide typical efficiency for the TPS61196EVM-600 board.
Figure 2. Efficiency Versus Dimming Cycle, 20 LEDs
4 TPS61196EVM-600 User's Guide SLVUA25 – January 2014 – Revised February 2014
Submit Documentation Feedback
Copyright © 2014, Texas Instruments Incorporated