Overview
The TPS40170RGYR from Texas Instruments is a full-featured, synchronous PWM buck controller designed for high-power density and high-reliability DC-DC converter applications. It operates over a wide input voltage range of 4.5 V to 60 V, making it suitable for various industrial, networking, and telecom equipment. The controller implements voltage-mode control with input voltage feed-forward compensation, enabling instant response to input voltage changes. It supports programmable switching frequencies from 100 kHz to 600 kHz and features a comprehensive set of system protection and monitoring capabilities.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 4.5 | - | 60 | V |
| Switching Frequency (fSW) | 100 | - | 600 | kHz |
| Output Voltage Regulation Accuracy | - | 1% | - | - |
| Maximum Duty Cycle | - | 95% (at 100 kHz) | - | - |
| Thermal Shutdown Set Threshold | 155 | 165 | 175 | °C |
| Package Type | - | 20-Pin VQFN (RGY) | - | - |
| Package Size | - | 3.5 mm × 4.5 mm | - | - |
| Operating Junction Temperature Range | -40 | - | 125 | °C |
Key Features
- Programmable undervoltage lockout (UVLO) and hysteresis
- Voltage-mode control with input voltage feed-forward compensation
- Programmable switching frequency between 100 kHz and 600 kHz
- Bi-directional frequency synchronization with primary and secondary options
- Low-side FET sensing overcurrent protection and high-side FET sensing short-circuit protection with integrated thermal compensation
- Programmable closed-loop soft-start
- Supports pre-biased outputs
- Thermal shutdown at 165°C with hysteresis
- Voltage tracking and power good signal
- ENABLE pin with 1-µA low current shutdown
- LDO output of 8.0 V and 3.3 V
- Integrated Bootstrap Diode
- Adaptive dead-time control
Applications
- Point-of-Load (POL) modules
- High-power density DC-DC converters for industrial equipment
- Networking and telecom equipment
- Industrial robots and motor drives
Q & A
- What is the input voltage range of the TPS40170RGYR?
The input voltage range is from 4.5 V to 60 V.
- What are the programmable switching frequency ranges for the TPS40170RGYR?
The switching frequency can be programmed between 100 kHz and 600 kHz.
- What type of control does the TPS40170RGYR implement?
The controller implements voltage-mode control with input voltage feed-forward compensation.
- Does the TPS40170RGYR support bi-directional frequency synchronization?
- What is the thermal shutdown set threshold for the TPS40170RGYR?
The thermal shutdown set threshold is between 155°C and 175°C.
- What is the package type and size of the TPS40170RGYR?
The package type is 20-Pin VQFN (RGY) with a size of 3.5 mm × 4.5 mm.
- Does the TPS40170RGYR support pre-biased outputs?
- What is the accuracy of the output voltage regulation for the TPS40170RGYR?
The output voltage regulation accuracy is ensured to be within 1%.
- What are some of the protection features of the TPS40170RGYR?
The controller features programmable undervoltage lockout (UVLO), overcurrent protection (OCP), short-circuit protection (SCP), and thermal shutdown.
- How does the ENABLE pin function in the TPS40170RGYR?
The ENABLE pin allows for system shutdown in a low-current (1 µA typical) mode.
