Overview
The TPS61040DRVTG4, produced by Texas Instruments, is a high-frequency boost converter designed for small to medium LCD bias supply and white LED backlight applications. This device is capable of generating output voltages up to 28 V from input voltages ranging from 1.8 V to 6 V, making it suitable for use with dual-cell NiMH/NiCd or single-cell Li-Ion batteries. The TPS61040DRVTG4 operates with a switching frequency of up to 1 MHz, allowing the use of small external components such as ceramic and tantalum output capacitors, which contributes to a very small overall solution size.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 1.8 to 6 | V |
| Adjustable Output Voltage Range | Up to 28 | V |
| Internal Switch Current Limit | 400 mA (TPS61040), 250 mA (TPS61041) | mA |
| Switching Frequency | Up to 1 MHz | Hz |
| No-Load Quiescent Current | 28 μA (typical) | μA |
| Shutdown Current | 1 μA (typical) | μA |
| Package Options | SOT23-5, TSOT23-5, 2-mm × 2-mm × 0.8-mm WSON | |
| MOSFET On-Resistance | 600-1000 mΩ (TPS61040), 750-1250 mΩ (TPS61041) | mΩ |
Key Features
- High-frequency boost converter with up to 1 MHz switching frequency
- Internal soft start to prevent inrush current
- Integrated MOSFET for high efficiency and ease of use
- Low quiescent current and shutdown current for power-saving
- Pulse-frequency-modulation (PFM) scheme with constant peak current control for high efficiency over the entire load current range
- Available in compact packages such as SOT23-5, TSOT23-5, and WSON
Applications
- LCD bias supply
- White LED backlight supplies for LCDs
- Digital still cameras
- PDAs, organizers, and handheld PCs
- Cellular phones
- Internet audio players
- Standard 3.3-V or 5-V to 12-V power conversions
Q & A
- What is the input voltage range of the TPS61040DRVTG4?
The input voltage range is from 1.8 V to 6 V.
- What is the maximum output voltage that the TPS61040DRVTG4 can generate?
The device can generate output voltages up to 28 V.
- What is the switching frequency of the TPS61040DRVTG4?
The switching frequency is up to 1 MHz.
- What are the typical quiescent and shutdown currents of the TPS61040DRVTG4?
The typical no-load quiescent current is 28 μA, and the typical shutdown current is 1 μA.
- What are the package options available for the TPS61040DRVTG4?
The device is available in SOT23-5, TSOT23-5, and 2-mm × 2-mm × 0.8-mm WSON packages.
- What control scheme does the TPS61040DRVTG4 use?
The device operates in a pulse-frequency-modulation (PFM) scheme with constant peak current control.
- What is the internal switch current limit for the TPS61040 and TPS61041?
The internal switch current limit is 400 mA for the TPS61040 and 250 mA for the TPS61041.
- What types of batteries can the TPS61040DRVTG4 be used with?
The device can be used with dual-cell NiMH/NiCd or single-cell Li-Ion batteries.
- What are some common applications of the TPS61040DRVTG4?
Common applications include LCD bias supply, white LED backlight supplies, digital still cameras, PDAs, and cellular phones.
- How does the internal soft start feature benefit the device?
The internal soft start prevents inrush current, ensuring a smooth startup and reducing the risk of damage to the device or other components.
