Product category: Power Supply ICs and Controllers
News Release from: Texas Instruments (April 2001-March 2006) | Subject: TPS43000
Edited by the Electronicstalk Editorial Team on 13 December 2001
PWM controller runs up
to 2MHz for high efficiency
The latest multitopology high-frequency BiCMOS PWM controller from Texas Instruments has an operating frequency of 2MHz for highly efficient, synchronous rectification DC/DC power conversion
High-frequency operation results in smaller magnetic and capacitive components, minimising overall part count and enabling a flexible, easy-to-use system power solution. The IC is ideal for battery-powered portable equipment, such as satellite and cellular phones, digital cameras, PDAs and GPS devices.
This article was originally published on Electronicstalk on 13 December 2001 at 8.00am (UK)
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Nonportable applications include distributed power and point of load, DC/DC power conversion for networking equipment, servers, base stations, and merchant and OEM power systems.
The TPS43000 regulates buck, boost, SEPIC and flyback topologies.
Handling input voltages as low as two alkaline or nickel batteries (1.8V) through 9.0V, the device controls output voltages in the 0.8 to 8.0V range.
External P- and N-channel power mosfets are driven directly by the IC's fast, high-current gate drive outputs.
The supply current is 1mA operating at 500kHz, whereas sleep mode consumes only 100uA and complete shutdown draws only 1uA.
Moreover, overall part count is kept low resulting in an extremely flexible and easy-to-use system power solution.
The high level of flexibility and features of this part make it ideal for portable and non-portable communications applications.
The TPS43000 features selectable pulse-by-pulse current limiting or hiccup mode overcurrent protection to handle an overload.
Additionally, the device's soft start is programmable along with continuous or discontinuous conduction mode of operation.
Undervoltage lockout keeps the controller idle until a 1.6V input threshold is reached, and 150mV of hysteresis facilitates smooth startups.
The TPS43000 can be programmed for synchronisable fixed-frequency operation or pulse frequency modulation (PFM) to achieve the lowest possible power consumption.
The TPS43000 is available now housed in a compact, low profile 16-pin TSSOP surface-mount power package.
Suggested resale pricing in quantities of 1000 is $2.75.
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