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EL7640, EL7641, EL7642
Data Sheet September 26, 2005 FN7415.
1
TFT-LCD DC/DC with Integrated Amplifiers
The EL7640, EL7641, and EL7642 integrate a high performance boost
regulator with 2 LDO controllers for VON and VOFF, a VON-slice circuit with adjustable delay and either one (EL7640), three (EL7641), or five amplifiers (EL7642) for VCOM and VGAMMA applications.
The boost converter in the EL7640, EL7641, and EL7642 is a current mode PWM type integrating an 18V N-channel MOSFET.
Operating at 1.
2MHz, this boost can operate in either P-mode for superior transient response, or in PI-mode for tighter output regulation.
Using external low-cost
transistors, the LDO controllers provide tight reg...