Features
- TFT-LCD display supply
- Boost regulator
- VON charge pump
- VOFF charge pump
- 2.7V to 14V VIN supply
- 5V VBOOST 17V
- 5V VON 40V
- -40V VOFF 0V
- VBOOST = 12V @ 470mA
- VBOOST = 15V @ 370mA
- High frequency, small inductor DC/DC boost circuit
- Over 90% efficient DC/DC boost converter capability
- Adjustable frequency
- Adjustable soft-start
- Adjustable outputs
- Small parts count
- Pb-free plus anneal available (RoHS compliant)
Description
The EL7583 is a 3-channel DC/DC converter IC which is designed primarily for use in TFT-LCD applications. It features a PWM boost converter with 2. 7V to 14V input capability and 5V to 17V output, which powers the column drivers and provides up to 470mA @ 12V, 370mA @ 15V from 5V supply. A pair of charge pump control circuits provide regulated outputs of VON and VOFF supplies at 8V to 40V and -5V to -40V, respectively, each at up to 60mA. The EL7583 features adjustable switching frequency, adjustable soft start, and a separate output VON enable control to allow selection of supply start-up sequence. An over-temperature feature is provided to allow the IC to be automatically protected from excessive power dissipation. The EL7583 is available in a standard 20 Ld TSSOP package and the Pb-free 20 Ld HTSSOP package. Both are specified for operation over the full -40°C to +85°C temperature range.
Applications
- TFT-LCD panels
- PDAs
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