TPS274C65 integrates an LED driver designed to drive 8 Status LEDs using only 4 outputs(LEDOUT1-LEDOUT4). This design provides the flexibility to ensure any combination of LEDs can be turned on at any given time and the user can configure the outputs through SPI using the TPS274C65 Registers. This LED driver is designed to control each output with independent clock signals with ON phases offset from each other. This ensures maximum flexibility for the user assigning use cases when configuring LED driver.

An example application is to provide ON/OFF channel status and fault indication per channel. In this example, the user could assign channel specific functionality for D1-D4 such as channel on or off and tie D5-D8 as fault indication LEDs. However, the user has full discretion on how they want to leverage these outputs.

RS and RF resistors determine the LED current through each LED and should be chosen according to the LED's current/light density specifications. Current will flow from VDD pins to the LEDs, and the average current through each LED will be VDD/RS(or RF)/4.

Figure 8-40 LED Driver