ISL97650B
4-Channel Integrated LCD Supply
Key Features
- 4.2V to 14V Input Supply
- AVDD Boost up to 20V, With Integrated 3.2A FET
- Integrated VON Charge Pump, Up to 35VOUT
- VOFF Charge Pump Driver, Down to -18V
- VLOGIC Buck Down to 1.2V, With Integrated 2A FET
- Automatic Start-up Sequencing
- AVDD -> VOFF -> VON
- Independent Logic Enable
- VON Slicing
- Thermally Enhanced 6x6 Thin QFN Package
- Pb-Free (RoHS compliant)
Description
The ISL97650B represents a high power, integrated LCD supply IC targeted at large panel LCD displays. The ISL97650B integrates a high power, 3.2A boost converter for AVDD generation, an integrated VON charge pump, a VOFF charge pump driver, VON slicing circuitry and a buck regulator with 2A switch for logic generation.
The ISL97650B has been designed for ease of layout and low BOM cost. Supply sequencing is integrated for both AVDD -> VOFF -> VON and AVDD/VOFF -> VON sequences. The TFT power sequence uses a separate enable to the logic buck regulator for maximum flexibility.
Peak efficiencies are >90% for both the boost and buck while operating from a 4.2V to 14V input supply. The current mode buck offers superior line and load regulation. Available in the 36 Ld TQFN package, the ISL97650B is specified for ambient operation over the -40°C to +105°C temperature range.
Applications
- LCD Monitors (15"+)
- LCD-TVs (up to 40")
- Notebook Displays (up to 16")
- Industrial/Medical LCD Displays
