Log in to myMicrochip to access tools and benefits. Sign up in just one minute.
Maximize Your Experience: Reap the Personalized Advantages by Completing Your Profile to Its Fullest. Update Here
Stay in the loop with the latest from Microchip. Update your profile while you are at it. Update Here
Complete your profile to access more resources. Update Here
true
AN804
| Title |
Title
Design Alternatives to the TC682 for Perfoming Inverting Voltage Doubler Functions (TC682, TCM828/9, TC1219/20, TC1142)
|
|---|---|
| Name |
Name
AN804
|
| Date |
Date
06/24/2015
|
| Application Categories |
Application Categories
Display /
Segmented LCD
|
| Product Categories |
Product Categories
Power Management ICs /
Charge Pump DC-to-DC Converters
Power Management ICs /
Switching Regulator
|
| Description |
Description
Creating a negative DC bias voltage from a positive DC supply often isrequiredinbattery-poweredportablehandheldinstruments that use a Liquid Crystal Display (LCD). Many LCDs require a relatively large negative bias on the order of ?10V; and since many portable systems (such as cellular subscriber units) often have a regulated +5V DC bias available, the critical design task involves converting this supply voltage to a negative DC bias for the LCD. This application note discusses the advantages and disadvan-tages of several alternatives for implementing the ?10V bias required by the LCD.
|