LM2715 Datasheet | National Semiconductor

Description The LM2715 is a pact bias solution for TFT displays. It has a current mode PWM step-up DC/DC converter with a 1.3A, 0.18Ω internal switch. Capable of generating 8V at 240m A from a Lithium Ion battery, the LM2715 is ideal for generating bias voltages for large screen LCD panels. The LM2715 operates at a switching frequency of 1.25MHz allowing for easy filtering and low noise. An external pensation pin gives the user flexibility in setting frequency pensation, which makes possible the use of small, low ESR ceramic capacitors at the output. The LM2715 uses a patented internal circuitry to limit startup inrush current of the boost switching regulator without the use of an external softstart capacitor. The LM2715 has an internal controllable PMOS switch used for controlling the row driver voltages. The switch can be controlled externally with a control pin and delay time. The LM2715 contains a V amplifier and a Gamma buffer capable of supplying 50m A source and sink. The TSSOP-16 package ensures a low profile overall solution. Features n n n n n n n n n n 1.3A, 0.18Ω, internal power switch VIN operating range: 2.2V to 12V 1.25MHz switching frequency step-up DC/DC converter Inrush current limiting circuitry Internal 7Ω PMOS switch PMOS switch control pin PMOS switch delay pin V amplifier Gamma buffer 16 pin TSSOP package Applications n LCD Bias Supplies Typical Application Circuit © 2003 National Semiconductor Corporation DS200584 .national. Connection Diagram Top View TJMAX TSSOP 16 package = 125˚C, θJA = 120˚C/W (Note 1) Pin Description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Name V+ V- V AGND Delay VC FB PGND SW VIN SWI SWO SWC AVIN GMA GMA+ V Amplifier positive input. V Amplifier negative input. V Amplifier output. Analog Ground. Connect to AGND plane. PMOS switch delay. Boost pensation Network Connection. Output Voltage Feedback input. Power Ground. Connect to PGND plane. NMOS power switch input. Main power input,...