LCD-bias supply


Posted on Nov 11, 2012

The circuit in Figure 1 provides ±18 to ±20V adjustable LCD bias voltages with 1% tracking accuracy. The circuit operates from a single 4.2 to 2.5V Li-ion cell for portable monochrome LCD applications. The circuit comprises two blocks: a negative-bias supply using the LT1611 inverting switching regulator and a positive-bias supply using the LT1636 rail-to-rail op amp. The LT1611 converts the Li-ion battery input voltage to a negative output voltage.



The LT1636 rail-to-rail op amp generates the positive LCD-bias output. The large capacitive-load capability, low quiescent current, and high-impedance input stage make the LT1636 suitable in this application. The LT1636 inverts the LT611`s output to




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

"Hee-Haw" Electronic Siren
Design and realizing of the electric transmission line monitoring system
up down counter circuit
Op Amp 741 Inverting Amplifier Circuit Simulation with output wave form and working
Kawasaki KLR650 1995 Electrical
Lithium battery charger schematic circuit design using LTM8061 IC
Phase shift and Wiens bridge oscillator
Homemade Metal Detector Kit
KL-25 type automatic thyristor excitation device circuit
Switching solenoid drive circuit diagram



Top