Description

This application note presents the operation principles for PWM LED driver control interface on DLP® Pico ASICs along with the driver performance assessment on DLP® projection display. Section 4 of the application note introduces LM3434 as the discrete LED driver on Pico products and includes the schematic, O-scope performance measurement, and design guidelines for mainstream LED products.

The application notes apply to DLPC6401 and DLPC2607 as long as the PWM driver controls the interface. The same LM3434 schematic can be adopted with the appropriate changes per LED Vf and If driving specification.