Intersil IC suits TFT-LCD apps

The EL7584 4-channel dc-dc converter IC from Intersil Corp. is designed primarily for use in TFT-LCD applications. The boost converter has a 2V to 14V input capability, and provides 5V to 17V output, which powers the column drivers and provides up to 370mA at 15V. A pair of charge pump control circuits provide outputs to allow the external generation of Von and Voff supplies at 5V to 40V and 0V to -40V, respectively, each at up to 60mA for 15V.

With adjustable switching frequency and on-chip power sequence to simplify start-up operation, the product features a separate input to externally increase the default delay of the positive charge pump. An over-temperature feature is provided to allow the IC to be automatically protected from excessive power dissipation.

Available in a 24-pin TSSOP package, the device is specified for operation between the -40°C and 85°C temperature range.