LCD Bias and Backup Supply


Posted on Nov 23, 2012

The LT®1316, a micropower step-up DC/DC converter with peak switch current control, meets these needs. The device draws 33mA quiescent current and contains a 0.6W, 30V switch that can be programmed for a maximum peak current between 30mA and 600mA with an external resistor. It also has a low-battery detector that remains active in shutdown, where quiescent current drops to 3mA. The two circuit examples below illustrate how the LT1316s current limit function allows realization of difficult converter circuits.



Portable electronic products with LCDs are getting thinner, resulting in severe restrictions on component height. LCD bias generators placed in or near the display housing need to use low profile (under 2mm) components to meet height restrictions. The




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