Overview
The TPS61081DRCT from Texas Instruments is a highly integrated boost converter designed for a wide range of applications requiring boosted voltages. This device is part of the TPS6108x family, which includes the TPS61080 and TPS61081, differing primarily in their current-limit ratings. The TPS61081 features an integrated power switch with a typical current rating of 1.3 A, making it suitable for applications that demand higher current outputs.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 2.5 V to 12 V |
| Output Voltage Range | Up to 27 V |
| Switching Frequency | 600 kHz or 1.2 MHz |
| Integrated Power Switch Current | Typically 1.3 A |
| Package Type | 3 × 3-mm QFN |
| Efficiency | High efficiency, especially at low input voltages |
| Protection Features | Pulse-by-pulse overcurrent limiting, short-circuit protection, overvoltage protection |
| Soft-Start Capability | Variable soft-start via SS pin |
Key Features
- Adjustable output voltage up to 27 V
- High efficiency with low input voltages
- Integrated feedback compensation and internal power switches
- Variable soft-start and adjustable reference voltage
- Pulse-by-pulse overcurrent limiting and short-circuit protection
- Overvoltage protection (OVP) circuit
- Low-RDS(on) isolation FET for minimal power loss
- Configurable switching frequency (600 kHz or 1.2 MHz) for optimal efficiency and component size
Applications
- Industrial power rails (e.g., 12-V or 24-V from 3.3-V or 5-V bus)
- Portable applications (boosting 3.6-V Li-ion battery voltage)
- Powering TFT LCDs, OLED displays, WLED backlights, and camera flashlights
- Medical, telecom, and consumer electronics
- Driving multiple series WLEDs in parallel for backlighting larger displays
Q & A
- What is the input voltage range of the TPS61081?
The input voltage range is from 2.5 V to 12 V. - What is the maximum output voltage of the TPS61081?
The maximum output voltage is up to 27 V. - What are the available switching frequencies for the TPS61081?
The switching frequencies can be configured to either 600 kHz or 1.2 MHz. - What is the typical current rating of the integrated power switch in the TPS61081?
The typical current rating is 1.3 A. - What type of package does the TPS61081 come in?
The TPS61081 comes in a 3 × 3-mm QFN package. - What protection features does the TPS61081 have?
The device features pulse-by-pulse overcurrent limiting, short-circuit protection, and overvoltage protection. - How does the TPS61081 handle soft-start?
The TPS61081 has variable soft-start capability via the SS pin. - What types of displays can the TPS61081 power?
The TPS61081 can power TFT LCDs, OLED displays, and WLED backlights. - Can the TPS61081 be used for industrial applications?
Yes, it can be used to create industrial power rails such as 12-V or 24-V from a 3.3-V or 5-V bus. - How does the TPS61081 manage inrush current during startup?
The device uses an integrated isolation switch and soft-start circuitry to control inrush current during startup.
