Overview
The TPS65105PWPR, produced by Texas Instruments, is a triple output LCD supply with a linear regulator and VCOM buffer. This device is designed to provide a compact and efficient power supply solution for thin film transistor (TFT) LCD displays. It integrates a main boost converter, positive and negative charge pumps, and a linear regulator controller, making it a comprehensive solution for various display applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 5.8 | V |
| Switching Frequency | - | 1.6 | - | MHz |
| Boost Converter Output Voltage (VO1) | 5 | - | 15 | V |
| Boost Converter Output Current (VO1) | - | - | 350 | mA |
| Negative Charge Pump Output Voltage (VO2) | -12 | - | -12 | V |
| Negative Charge Pump Output Current (VO2) | - | - | 20 | mA |
| Positive Charge Pump Output Voltage (VO3) | - | - | 30 | V |
| Positive Charge Pump Output Current (VO3) | - | - | 20 | mA |
| Linear Regulator Output Voltage (VO4) | 3.2 | 3.3 | 3.4 | V |
| Linear Regulator Output Current (VO4) | - | - | 500 | mA |
| Switch Current Limit (TPS65105) | 0.96 | 1.37 | 1.56 | A |
| Thermal Shutdown Temperature | - | - | 160 | °C |
Key Features
- 1.6-MHz fixed switching frequency for the boost converter, allowing for small external components.
- Three independent adjustable outputs: VO1 (up to 15 V), VO2 (down to -12 V), and VO3 (up to 30 V).
- Integrated VCOM buffer for powering the LCD backplane.
- Auxiliary 3.3-V linear regulator controller for generating a logic power rail.
- Internal soft start and power-on sequencing to avoid heavy voltage drops.
- Fault detection and thermal shutdown for enhanced safety (except TPS65101).
- Virtual Synchronous Converter Technology for improved load transient response.
- Available in TSSOP-24 and VQFN-24 PowerPAD™ packages.
Applications
- TFT LCD displays for notebooks and monitors.
- Portable DVD players.
- Tablet PCs.
- Car navigation systems.
- Industrial displays.
Q & A
- What is the input voltage range of the TPS65105PWPR? The input voltage range is from 2.7 V to 5.8 V.
- What is the switching frequency of the boost converter? The switching frequency is fixed at 1.6 MHz.
- What are the output voltages and currents of the boost converter (VO1)? The output voltage range is from 5 V to 15 V, with a maximum current of 350 mA.
- Does the TPS65105PWPR have built-in fault detection? Yes, except for the TPS65101 variant, which does not have fault detection.
- What is the purpose of the integrated VCOM buffer? The VCOM buffer is used to power the LCD backplane.
- Can the TPS65105PWPR generate a 3.3-V logic power rail? Yes, it includes an auxiliary 3.3-V linear regulator controller for this purpose.
- What are the package options for the TPS65105PWPR? It is available in TSSOP-24 and VQFN-24 PowerPAD™ packages.
- What is the thermal shutdown temperature of the TPS65105PWPR? The thermal shutdown temperature is 160°C.
- Does the TPS65105PWPR have internal soft start and power-on sequencing? Yes, it includes internal soft start and power-on sequencing to avoid heavy voltage drops.
- What is the typical switch current limit for the TPS65105PWPR? The typical switch current limit is 1.37 A.
