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Boost converter eases design in POL apps

Posted: 12 Dec 2007     Print Version  Bookmark and Share

Keywords:high-voltage boost converter  pulse width modulation 


Texas Instruments Inc. has introduced a tiny, high-voltage boost converter with an integrated 40V, 1.2A FET and a wide input-voltage range of 3V to 18V.

The high-efficiency device supports boost, SEPIC (single-ended primary inductor converter) and flyback topologies, which are used to regulate single or dual Li-ion battery inputs. Available in a 2-by-2mm QFN package, the converter simplifies design in industrial or medical point-of-load applications such as 5V to 12V or 12V to 24V systems.

The TPS61170 operates at a fixed switching frequency of 1.2MHz, allowing the use of tiny, low-profile inductors and low-value ceramic input and output capacitors. The boost converter features single-wire digital serial interface and pulse width modulation (PWM) inputs, which allows the device to dynamically adjust the output voltage during operation. Protection features of the TPS61170 include soft-start, overcurrent limit and overtemperature protection.

Key features of TPS61170 include 3-18V input voltage range, integrated 40V, 1.2A FET switch and 1.2MHz fixed switching frequency. The device also offers more than 90 per cent efficiency, programmable reference voltage using PWM signal or single-wire digital interface and built-in soft start and over-current limit.

Available today in volume, suggested resale pricing for the device in quantities of 1,000 units starts at Rs.55.24 ($1.40). Evaluation modules are also available.

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