Product category: Power Supply ICs and Controllers
News Release from: Maxim Integrated Products | Subject: MAX5094
Edited by the Electronicstalk Editorial Team on 22 November 2005
PWM controller upgrades industry
standards
The MAX5094 is a high-performance single-ended current-mode PWM controller for isolated telecomms DC/DC convertors or universal offline input AC/DC power supplies.
Maxim Integrated Products has released the MAX5094, a high-performance single-ended current-mode PWM controller for isolated telecomms DC/DC convertors or universal offline input AC/DC power supplies This device is pin compatible with the industry standard and multisourced UCC28C43 and UCC28C45 family of products
This article was originally published on Electronicstalk on 27 Aug 2002 at 8.00am (UK)
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Moreover, the MAX5094 provides lower startup current, tighter oscillator-frequency tolerance, and tighter current-sense accuracy than the UCC28C43 and UCC28C45, so designers can easily upgrade existing power-supply designs for higher performance with minimal component changes.
The MAX5094's switching frequency is externally programmable from 20kHz to 1MHz.
In addition the switching frequency is trimmed for +/-7% accuracy while current-limit threshold and start/stop voltages are trimmed for +/-5% accuracy.
The timing-capacitor discharge current is trimmed to +/-5%.
This allows accurate programming of the maximum duty cycle, which is 100% and 50% for the MAX5094A and MAX5094B, respectively.
The device's low 60ns cycle-by-cycle current-limit propagation delay provides a fast response to output short circuit.
Startup current is typically 35uA, which allows the use of a high-value startup resistor, thus reducing power dissipation and the size of the startup resistor.
The MAX5094 gate-driver output is capable of sourcing 2A and sinking 1A.
Rated for operation over a wide -40 to +125C temperature range, the MAX5094 is available in 8-pin SO and 8-pin microMAX packages.
Pricing starts at $0.64 (1000-up FOB USA).
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