Texas Instruments TPS61042EVM-226, Руководство пользователя, Страница: 10 / 22

Background
1-2
1.1 Background
This TPS61042EVM uses the TPS61042 boost converter to provide 20 mA of
bias current to a four-element white LED from a 1.8 V to 6 V input. This EVM
may be modified to drive more or less than four LEDs. It may also be modified
to deliver a higher or lower output current to the LEDs. Refer to the data sheet
for more information on adjusting the rated output current. The EVM includes
a CTRL pin and an ADJ pin that allows the user to dim the LEDs. The LEDs
may be dimmed using either an analog or a PWM dimming scheme. Informa-
tion about output voltage and current ratings of TPS61042 can be found in the
data sheet SLVS439
.