Overview
The TPS65145PWP, produced by Texas Instruments, is a highly integrated power management IC designed specifically for thin film transistor (TFT) LCD displays. This device is part of the TPS6514x series and offers a compact solution to provide all the necessary voltages for TFT LCD displays. It features a main boost converter, negative and positive charge pumps, and an auxiliary linear regulator controller. The TPS65145PWP is ideal for applications requiring multiple regulated output voltages with high accuracy and reliability.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 V to 5.8 V | V |
| Switching Frequency | 1.6 MHz | Hz |
| Main Output (VO1) | Up to 15 V / 400 mA | V / mA |
| Negative Charge Pump (VO2) | Down to ±12 V / 20 mA | V / mA |
| Positive Charge Pump (VO3) | Up to 30 V / 20 mA | V / mA |
| Auxiliary Linear Regulator (VO4) | 3.3 V | V |
| Output Voltage Accuracy (VO1) | <1% Typical | % |
| Package Type | 24-Pin HTSSOP and 24-Pin VQFN PowerPAD™ | |
| Thermal Shutdown | Yes | |
| System Power Good | Yes |
Key Features
- 1.6-MHz fixed switching frequency for the main boost converter and charge pumps, allowing for small external components.
- Three independent adjustable outputs: VO1 (main boost converter), VO2 (negative charge pump), and VO3 (positive charge pump).
- Auxiliary 3.3-V linear regulator controller for generating a logic power rail.
- Internal soft start and power-on sequencing to avoid voltage drops during startup.
- Fault detection and shutdown for all outputs (except TPS65141), including overvoltage and undervoltage protection.
- System power good output to indicate when all supply rails are within acceptable limits.
- Compact packaging in 24-Pin HTSSOP and 24-Pin VQFN PowerPAD™.
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 TPS65145PWP?
The input voltage range is from 2.7 V to 5.8 V.
- What is the switching frequency of the main boost converter?
The switching frequency is fixed at 1.6 MHz.
- What are the output voltages and currents of the TPS65145PWP?
The main output (VO1) is up to 15 V / 400 mA, the negative charge pump (VO2) is down to ±12 V / 20 mA, and the positive charge pump (VO3) is up to 30 V / 20 mA.
- Does the TPS65145PWP have an auxiliary linear regulator?
Yes, it has an auxiliary 3.3-V linear regulator controller.
- What is the purpose of the system power good output?
The system power good output indicates when all supply rails (VO1, VO2, VO3) are within 10% of their nominal output voltage.
- Does the TPS65145PWP have thermal shutdown protection?
Yes, it has thermal shutdown protection to prevent overheating.
- What types of packages are available for the TPS65145PWP?
The device is available in 24-Pin HTSSOP and 24-Pin VQFN PowerPAD™ packages.
- How does the TPS65145PWP handle fault conditions?
The device has fault detection and shutdown for all outputs, including overvoltage and undervoltage protection, except for the TPS65141 model.
- What is the purpose of the internal soft start feature?
The internal soft start feature avoids heavy voltage drops at the input voltage rail or at the output of the main boost converter during startup.
- What are some common applications for the TPS65145PWP?
Common applications include TFT LCD displays for notebooks and monitors, portable DVD players, tablet PCs, car navigation systems, and industrial displays.
