Overview
The TPS40055PWPR is a high-voltage, wide-input synchronous step-down controller produced by Texas Instruments. This component is part of the TPS4005x family, which offers a range of user-programmable functions to enhance design flexibility. Introduced in December 2003, the TPS40055PWPR is designed to operate over a wide input voltage range of 8 V to 40 V, making it suitable for various power management applications. The controller uses voltage feedforward control techniques to ensure good line regulation and fast response to input line transients, which simplifies loop compensation due to its near-constant modulator gain with input variation.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Input Voltage Range (VIN) | - | 8 | - | 40 | V |
| Quiescent Current (IDD) | Output drivers not switching, VFB ≥ 0.75 V | 1.5 | 3 | - | mA |
| Switching Frequency (fOSC) | 8 V ≤ VIN ≤ 40 V | 470 | 520 | 570 | kHz |
| High-Level Input Voltage (VIH), SYNC | - | - | 2 | - | V |
| Low-Level Input Voltage (VIL), SYNC | - | 0.8 | - | - | V |
| Current Limit Sink Current (ISINK) | - | 8.5 | 10 | 11.5 | µA |
| Thermal Shutdown Temperature (TSD) | - | 165 | - | - | °C |
| Operating Temperature Range | - | -40 | - | 85 | °C |
| Package Type | - | - | - | HTSSOP (PWP), 16 pins | - |
Key Features
- Wide Input Voltage Range: Operates from 8 V to 40 V, making it versatile for various applications.
- Voltage Feedforward Control: Provides good line regulation and fast response to input line transients.
- Programmable Fixed-Frequency: Up to 1 MHz voltage mode controller.
- Internal Gate-Drive Outputs: For high-side and synchronous N-channel MOSFETs.
- Thermal Shutdown: Protects the device from overheating.
- Externally Synchronizable: Allows synchronization with an external clock signal.
- Programmable High-Side Sense Short-Circuit Protection: Enhances reliability and safety.
- Programmable Closed-Loop Soft Start: Reduces inrush current during startup.
- Source and Sink Capability: The TPS40055 can both source and sink current, unlike the TPS40054 which is source only.
Applications
The TPS40055PWPR is suitable for a variety of power management applications due to its wide input voltage range and programmable features. Some typical applications include:
- Power Supplies: For DC-DC conversion in power supplies, especially those requiring high efficiency and reliability.
- Industrial Control Systems: Where robust and flexible power management is crucial.
- Telecommunications Equipment: For powering various components in telecom systems.
- Aerospace and Defense Systems: Where high reliability and wide input voltage range are essential.
- Reference Designs: Such as synchronous buck converters for satellite modems, set-top boxes, and other specific applications as outlined in the reference designs provided by Texas Instruments.
Q & A
- What is the input voltage range of the TPS40055PWPR?
The input voltage range is from 8 V to 40 V.
- What is the switching frequency range of the TPS40055PWPR?
The switching frequency can be programmed up to 1 MHz.
- Does the TPS40055PWPR support external synchronization?
Yes, it is externally synchronizable.
- What type of package does the TPS40055PWPR come in?
It comes in a 16-pin HTSSOP (PWP) package.
- What is the operating temperature range of the TPS40055PWPR?
The operating temperature range is from -40°C to 85°C.
- Does the TPS40055PWPR have thermal shutdown protection?
Yes, it has thermal shutdown protection.
- How does the TPS40055PWPR handle overcurrent protection?
It uses a two-tier approach with pulse-by-pulse protection and a fault counter for hiccup mode operation.
- Can the TPS40055PWPR both source and sink current?
Yes, it can both source and sink current.
- What are some typical applications for the TPS40055PWPR?
Typical applications include power supplies, industrial control systems, telecommunications equipment, and aerospace and defense systems.
- Are there reference designs available for the TPS40055PWPR?
Yes, Texas Instruments provides various reference designs for specific applications.
