Overview
The TPS61165DBVT from Texas Instruments is a high-efficiency, high-output-voltage boost converter designed to drive white LEDs in series. This device is ideal for applications requiring high-brightness LED lighting due to its integrated 40-V rated switch FET and 1.2-MHz fixed switching frequency. The TPS61165DBVT is available in both WSON and SOT-23 packages, making it suitable for a variety of space-constrained designs. It features flexible brightness control through either a one-wire digital interface (EasyScale™ protocol) or pulse-width modulation (PWM) signals, ensuring versatile and efficient LED current management.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 3 - 18 | V |
| Output Voltage Range | Up to 38 | V |
| Switch FET Rating | 40 V / 1.2 A | V / A |
| Switching Frequency | 1.2 MHz | Hz |
| Reference Voltage | 200 mV (typical) with 2% accuracy | mV |
| Efficiency | Up to 90% | % |
| Operating Ambient Temperature | -40 to 85 | °C |
| Operating Junction Temperature | -40 to 125 | °C |
| Package Type | SOT-23 (6-pin) | - |
| Package Size | 2.90 mm × 1.60 mm | mm |
Key Features
- Flexible one-wire digital and PWM brightness control using the CTRL pin
- Built-in soft start to prevent inrush current
- Integrated open-LED protection to prevent output voltage from exceeding maximum ratings
- High efficiency up to 90%
- Small package size (WSON and SOT-23) with thermal pad for improved thermal performance
- No audible noise generation due to non-bursting LED current
- Internal thermal shutdown to protect against overheating
Applications
- High-brightness LED lighting
- White LED backlighting for media form factor displays
- Handheld data terminals (EPOS)
- Thermostat displays
- Human Machine Interface (HMI)
- Video surveillance cameras
- Exit signs
- HMI and control panels
- Industrial PCs
- IR LED drivers
- Refrigerators and ovens
Q & A
- What is the input voltage range of the TPS61165DBVT?
The input voltage range is 3 V to 18 V.
- What is the maximum output voltage of the TPS61165DBVT?
The maximum output voltage is up to 38 V.
- What is the switching frequency of the TPS61165DBVT?
The switching frequency is 1.2 MHz.
- How is the brightness of the LEDs controlled in the TPS61165DBVT?
The brightness can be controlled using either a one-wire digital interface (EasyScale™ protocol) or a PWM signal through the CTRL pin.
- What is the efficiency of the TPS61165DBVT?
The efficiency can be up to 90%.
- What are the package options for the TPS61165DBVT?
The device is available in both WSON and SOT-23 packages.
- What is the purpose of the integrated open-LED protection in the TPS61165DBVT?
The integrated open-LED protection disables the device to prevent the output from exceeding its absolute maximum voltage ratings during open LED conditions.
- How does the TPS61165DBVT handle thermal issues?
The device features an internal thermal shutdown that turns off the device when the junction temperature exceeds 160°C and automatically restarts when the temperature decreases by 15°C.
- What are some common applications of the TPS61165DBVT?
Common applications include high-brightness LED lighting, white LED backlighting, handheld data terminals, thermostat displays, and more.
- How does the soft start feature work in the TPS61165DBVT?
The built-in soft start prevents inrush current by gradually increasing the output voltage as the input voltage rises.
