TPS65140是TI公司的一款电流感应放大器、I2C/PMBus监控器产品，TPS65140是具有完全集成的 正极 充电泵的 4 通道 LCD 偏置、3.3V LDO 控制器、1.6A 最低 升压 Ilim 和故障检测，本页介绍了TPS65140的产品说明、应用、特性等，并给出了与TPS65140相关的TI元器件型号供参考。
TPS65140 - 具有完全集成的 正极 充电泵的 4 通道 LCD 偏置、3.3V LDO 控制器、1.6A 最低 升压 Ilim 和故障检测 - 电流感应放大器、I2C/PMBus监控器 - 保护、监控和热插拔 - TI公司（Texas Instruments，德州仪器）
The TPS6514x series offers a compact and small power supply solution to provide all three voltages required by thin film transistor (TFT) LCD displays. The auxiliary linear regulator controller can be used to generate a 3.3-V logic power rail for systems powered by a 5-V supply rail only.
The main output VO1 is a 1.6-MHz fixed frequency PWM boost converter providing the source drive voltage for the LCD display. The device is available in two versions with different internal switch current limits to allow the use of a smaller external inductor when lower output power is required. The TPS65140/41 has a typical switch current limit of 2.3 A and the TPS65145 has a typical switch current limit of 1.37 A. A fully integrated adjustable charge pump doubler/tripler provides the positive LCD gate drive voltage. An externally adjustable negative charge pump provides the negative gate drive voltage. Due to the high 1.6-MHz switching frequency of the charge pumps, inexpensive and small 220-nF capacitors can be used.
Additionally, the TPS6514x series has a system power good output to indicate when all supply rails are acceptable. For LCD panels powered by 5 V the device has a linear regulator controller using an external transistor to provide a regulated 3.3 V output for the digital circuits. For maximum safety, the TPS65140/45 goes into shutdown as soon as one of the outputs is out of regulation. The device can be enabled again by toggling the input or the enable (EN) pin to GND. The TPS65141 does not enter shutdown when one of its outputs is below its power good threshold.
- 2.7-V to 5.8-V Input Voltage Range
- 1.6-MHz Fixed Switching Frequency
- 3 Independent Adjustable Outputs
- Main Output up to 15 V With <1% Typical Output Voltage Accuracy
- Virtual Synchronous Converter Technology
- Negative Regulated Charge Pump Driver VO2
- Positive Charge Pump Converter VO3
- Auxiliary 3.3-V Linear Regulator Controller
- Internal Soft Start
- Internal Power-On Sequencing
- Fault Detection of all Outputs (TPS65140/45)
- No Fault Detection (TPS65141)
- Thermal Shutdown
- System Power Good
- Available in TSSOP-24 and QFN-24 PowerPAD Packages
