Overview
The TPS61161DRVR from Texas Instruments is a high-efficiency boost converter designed to drive white LEDs in series. This device features a 40-V rated integrated switch FET and operates at a fixed 600-kHz switching frequency, which helps reduce output ripple, improve conversion efficiency, and enable the use of small external components. The TPS61161 is particularly suited for applications requiring flexible brightness control and robust protection mechanisms, such as open LED protection and undervoltage lockout.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | 18 | V | |
| Open LED Protection | 38 | V | ||
| Reference Voltage | 196 | 200 | 204 | mV |
| Switching Frequency | 600 | kHz | ||
| Switch FET Current Limit | 0.56 | 0.7 | 0.84 | A |
| Operating Temperature Range | -40 | 85 | °C | |
| Package Type | WSON (6-pin) with thermal pad |
Key Features
- Flexible digital and PWM brightness control using the EasyScale protocol or PWM signals through the CTRL pin.
- Built-in soft start to prevent inrush currents.
- Up to 90% efficiency.
- Integrated open LED protection to prevent output voltage from exceeding the device's absolute maximum voltage ratings.
- Undervoltage lockout and thermal shutdown for enhanced protection.
- Space-saving 2-mm × 2-mm WSON package with thermal pad.
Applications
- Cellular phones.
- Portable media players.
- Ultra mobile devices.
- GPS receivers.
- White LED backlighting for media form factor displays.
Q & A
- What is the input voltage range of the TPS61161? The input voltage range is from 2.7 V to 18 V.
- What is the switching frequency of the TPS61161? The switching frequency is 600 kHz.
- How is the LED current controlled in the TPS61161? The LED current can be controlled using either the one-wire digital interface (EasyScale protocol) or a PWM signal through the CTRL pin.
- What is the open LED protection voltage for the TPS61161? The open LED protection voltage is 38 V.
- What is the reference voltage accuracy of the TPS61161? The reference voltage has an accuracy of ±2% at 200 mV.
- What is the maximum efficiency of the TPS61161? The maximum efficiency is up to 90%.
- What package type is the TPS61161 available in? The TPS61161 is available in a 2-mm × 2-mm WSON package with a thermal pad.
- What are the main protection features of the TPS61161? The main protection features include open LED protection, undervoltage lockout, and thermal shutdown.
- How does the TPS61161 handle dimming modes? The TPS61161 supports both PWM dimming and one-wire digital dimming using the EasyScale protocol.
- What is the operating temperature range of the TPS61161? The operating temperature range is from -40°C to 85°C.
