Overview
The TPS61165DRVTG4, produced by Texas Instruments, is a high-efficiency boost converter designed to drive high-brightness white LEDs in series. This device is particularly suited for general lighting applications due to its integrated 40-V rated switch FET and 1.2-A switch current limit. It operates at a fixed 1.2-MHz switching frequency, ensuring high efficiency and stable operation. The TPS61165 features flexible brightness control through either a one-wire digital interface (EasyScale™ protocol) or pulse-width-modulation (PWM) signals, and it includes built-in soft start and open-LED protection for enhanced reliability and safety.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range (VIN) | 3 | - | 18 | V |
| Switch FET Current Limit | - | 1.2 | - | A |
| Switching Frequency | 1.0 | 1.2 | 1.5 | MHz |
| Reference Voltage (VREF) | 196 | 200 | 204 | mV |
| Operating Ambient Temperature (TA) | -40 | - | 85 | °C |
| Operating Junction Temperature (TJ) | -40 | - | 125 | °C |
| Package Types | - | WSON (6-pin), SOT-23 (6-pin) | - | - |
| Efficiency | - | Up to 90% | - | % |
Key Features
- 3-V to 18-V input voltage range
- 38-V open LED protection
- 200-mV reference voltage with 2% accuracy
- 1.2-A switch FET with 1.2-MHz switching frequency
- Flexible one-wire digital and PWM brightness control
- Built-in soft start
- Up to 90% efficiency
- Available in 2-mm × 2-mm × 0.8-mm 6-Pin WSON package with thermal pad, and SOT-23 package
Applications
- High-brightness LED lighting
- White LED backlighting for media form factor display
- Handheld data terminals (EPOS)
- Thermostat display
- Human machine interface (HMI)
- Video surveillance camera
- Exit signs
- HMI and control panels
- Industrial PCs
- IR LED driver
- Refrigerator and oven displays
Q & A
- What is the input voltage range of the TPS61165?
The input voltage range of the TPS61165 is from 3 V to 18 V.
- What is the switching frequency of the TPS61165?
The TPS61165 operates at a fixed switching frequency of 1.2 MHz.
- How can the brightness of the LEDs be controlled with the TPS61165?
The brightness can be controlled using either a one-wire digital interface (EasyScale™ protocol) or a pulse-width-modulation (PWM) signal through the CTRL pin.
- What is the maximum efficiency of the TPS61165?
The TPS61165 can achieve up to 90% efficiency.
- What types of packages are available for the TPS61165?
The TPS61165 is available in 6-Pin WSON and SOT-23 packages.
- What is the purpose of the open-LED protection feature?
The open-LED protection feature disables the device to prevent the output from exceeding its absolute maximum voltage ratings during open LED conditions.
- How does the soft start feature work in the TPS61165?
The built-in soft start feature gradually ramps up the output voltage to prevent inrush currents and ensure smooth startup.
- What is the operating ambient temperature range for the TPS61165?
The operating ambient temperature range is from -40°C to 85°C.
- What is the maximum junction temperature for the TPS61165?
The maximum junction temperature is 125°C.
- How does the device enter shutdown mode?
The device enters shutdown mode when the CTRL voltage is logic low for more than 2.5 ms.
