Product category:
Power Supply ICs and Controllers
News Release from: Micrel | Subject: MIC2186
Edited by the Electronicstalk Editorial
Team on 08 March 2001
Controller generates high voltage from
3.3V rails
The industry's most flexible low-voltage DC/DC PWM (pulsewidth modulation) controller is now available from Micrel Semiconductor.
The industry's most flexible low-voltage DC/DC PWM (pulsewidth modulation) controller is now available from Micrel Semiconductor The MIC2186 is configurable for boost, flyback and SEPIC (single-ended primary inductance convertor) topologies
This article was originally published on Electronicstalk on 5 Dec 2000 at 8.00am (UK)
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Most of today's communication equipment is powered from high-power 3.3V power supplies.
It is a common requirement for the equipment to also need some auxiliary supply voltages, like 5, 12 and 24V.
The MIC2186 provides an ideal solution to efficiently generate high-voltage, high-current supply rails from the main 3.3V supply.
The device features an input voltage of 2.9-14V, and a built-in, high-power 7A output driver, capable of driving large mosfets.
The MIC2186 can boost a 3.3V input, for example, and achieve 5V output at 5A at over 90% efficiency.
The switching frequency of the MIC2186 can be selected from 100, 200 or 400kHz, depending on the efficiency and noise spectrum requirements of the power supply.
The MIC2186 can be synchronised up to 600kHz.
"Flexible frequency selection in the MIC2186 is an advantage especially in XDSL-type communications systems, where the switching DC/DC convertor needs to avoid frequencies in the transmit/receive band of the communications system", says Tony Grizelj, Micrel's marketing manager for power products.
The MIC2186 has a maximum duty cycle of 85%.
A user-selectable option allows this to be reduced to 50%, permitting the device to be used in flyback applications.
The MIC2186BM is available in a SO-16 package, and is priced at $3.50 when purchased in 1000-piece quantities.
Samples are available from stock.
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