Overview
The TPS61040DDCT is a high-frequency boost converter from Texas Instruments, designed for small to medium LCD bias supply and white LED backlight applications. This device is part of the TPS61040 series and is ideal for generating output voltages up to 28 V from a dual-cell NiMH/NiCd or a single-cell Li-Ion battery. It is also suitable for standard 3.3-V or 5-V to 12-V power conversions. The TPS61040DDCT operates with a switching frequency up to 1 MHz, allowing the use of small external components such as ceramic and tantalum output capacitors, which contributes to a very compact overall solution size.
Key Specifications
| Parameter | Value |
|---|---|
| Input Voltage Range | 1.8 V to 6 V |
| Adjustable Output Voltage Range | Up to 28 V |
| Internal Switch Current | 400 mA (TPS61040), 250 mA (TPS61041) |
| Switching Frequency | Up to 1 MHz |
| No-Load Quiescent Current | Typically 28 μA |
| Shutdown Current | Typically 1 μA |
| Package | SOT-23-THN (DDC), 5 pins |
| Operating Temperature Range | -40°C to 125°C |
Key Features
- High-frequency boost converter with up to 1 MHz switching frequency
- Internal soft start to limit inrush current
- Low quiescent current (typically 28 μA) and low shutdown current (typically 1 μA)
- Compact package options including SOT23-5 and 2-mm × 2-mm × 0.8-mm WSON
- Pulse-frequency-modulation (PFM) scheme with constant peak current control for high efficiency
- Adjustable output voltage range up to 28 V
- Internal voltage reference of 1.233 V
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 TPS61040DDCT?
The input voltage range is from 1.8 V to 6 V.
- What is the maximum output voltage that the TPS61040DDCT can generate?
The device can generate output voltages up to 28 V.
- What is the internal switch current limit for the TPS61040DDCT?
The internal switch current limit is 400 mA for the TPS61040 and 250 mA for the TPS61041.
- What is the switching frequency of the TPS61040DDCT?
The switching frequency is up to 1 MHz.
- What is the typical no-load quiescent current of the TPS61040DDCT?
The typical no-load quiescent current is 28 μA.
- What is the typical shutdown current of the TPS61040DDCT?
The typical shutdown current is 1 μA.
- In what packages is the TPS61040DDCT available?
The device is available in SOT23-5 and 2-mm × 2-mm × 0.8-mm WSON packages.
- What is the operating temperature range of the TPS61040DDCT?
The operating temperature range is from -40°C to 125°C.
- What control scheme does the TPS61040DDCT use?
The device operates in a pulse-frequency-modulation (PFM) scheme with constant peak current control.
- What are some common applications of the TPS61040DDCT?
Common applications include LCD bias supply, white LED backlight supplies, digital still cameras, PDAs, and cellular phones.
