Extending Battery Life with the TPS61040 White Light LED Driver

Texas Instruments

Published Date: 05/03/2002

Description

This application note describes how to extend the battery life of a circuit that uses Texas Instrument's TPS61040 low power dc-dc boost converter for driving white light LEDs. Power loss in the current sense resistor is discussed and a method for reducing this loss is presented. Design equations are given for calculating the proper resistor values for a white light LED driver that includes prov

Parts

Part Number Name Companion Part
TPS61040DBVR TPS61040DBVR Buy Datasheet
TPS61040DBVRG4 TPS61040DBVRG4 Buy Datasheet
TPS61040DDCR TPS61040DDCR Buy Datasheet
TPS61040DDCT TPS61040DDCT Buy Datasheet
TPS61040DRVR TPS61040DRVR Buy Datasheet
TPS61040DRVT TPS61040DRVT Buy Datasheet
TPS61040DRVTG4 TPS61040DRVTG4 Buy Datasheet
TPS61041DBVR TPS61041DBVR Buy Datasheet
TPS61041DBVRG4 TPS61041DBVRG4 Buy Datasheet
TPS61041DRVR TPS61041DRVR Buy Datasheet
TPS61041DRVRG4 TPS61041DRVRG4 Buy Datasheet
TPS61041DRVT TPS61041DRVT Buy Datasheet
TPS61041DRVTG4 TPS61041DRVTG4 Buy Datasheet