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Features
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
Vcom amplifier
Gamma buffer
16 pin TSSOP or 24 pin LLP packages
Description The LM2715 is a compact 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 240mA 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 compensation pin gives the user flexibility in setting frequency compensation, 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 Vcom amplifier and a Gamma buffer capable of supplying 50mA source and sink. The TSSOP-16 or LLP-24
packages ensure a low profile overall solution.
Applications
LCD Bias Supplies
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