1A Dual Channel Charge Pump Power Solution For TFT LCD Panel

PublishTime： 2021-08-07 Article Source：LowPowerSemi

LowPowerSemi's LP3101A DC/DC converter integrates two low noise, high efficiency charge pumps for dual outputs, which consist of one inverting output and a step-up output. The device operates from 2.5V to 4.8V input and provides a step-up output voltage (VP) of 2x the input voltage. The negative inverting output (VN) is-1xinverted from the positive output VP.

Fig.1 Typical Application Circuit

The LP3101A is available in a small TDFN-12 pin package that features a bottom-side exposed thermal pad to provide optimal heat dissipation. The small package size and low external parts count make the device ideally suitable for TFT LCD applications of mobile products. The device is rated to operate from – 40 ℃ to +85 ℃ ambient temperature range.

Features

●2.5V to 4.8V Input Supply Voltage Range

● Adaptive 1.5x/ 2x mode switchover for positive voltage and -1x mode for negative voltage

●VP output range: 5.4V to 5.9V

●VN output range: -5.4V to -5.9V

●High current output:

∎Vin=2.8V, Iout=±40mA;

∎ Vin=3.3V, Iout=±50mA;

● Built-in Power-On Sequence

● TDFN-12 1.5mm × 3.0mm Package

Electrical Characteristics for Each Channel:

(V IN =VEN , C1 1 = C 2=C3 = 2.2 uF , C4 4 =C5 5= = C6=1 1 uF, Typical values are TA A =25 ℃ )

Table.1 Electrical Characteristic

Applications

● Mobile Device, SmartPhone

● Portable Media Players/MP3 players

● Cellular and Smart mobile phone

● LCD Bias Power

Ordering Information

Fig.2

Table.2 Marking Information

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Integrated Circuits