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Description
The UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency performance. The UC3879 can be configured to provide control in either voltage mode or current mode operation, with overcurrent shutdown for fast fault protection. Independently programmable time delays provide dead-time at the turn-on of each output stage, allowing time for each resonant switching interval. With the oscillator capable of operating in excess of 600 kHz, overall output switching frequencies to 300 kHz are practical. In addition to the standard free running mode, with the CLKSYNC pin, the user may configure the UC3879 to accept an external clock synchronization signal. Alternatively, up to three units can be locked together with the operational frequency determined by the fastest device. Protective features include an undervoltage lockout and overcurrent protection. Additional features include a 10-MHz error amplifier, a 5-V precision reference, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q and 28 pin L packages.
Title
Enhanced bipolar phase shifted full bridge controller with selectable UVLO, -40°C to 85°C
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Preview of the first 3 pages of the data sheet
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10-MHz Error Amplifier Pin Programmable Undervoltage Lockout Low Startup Current 150 µA Soft Start Control Outputs Active Low During UVLO
DESCRIPTIONThe UC3879 controls a bridge power stage by phase shifting the switching of one half-bridge with respect to the other. This allows constant frequency pulse width modulation in combination with resonant, zero-voltage switching for high efficiency performance. The UC3879 can be configured to provide control in either voltage mode or current mode operation, with overcurrent shutdown for fast fault protection.
Independently programmable time delays provide dead-time at the turn-on of each output stage, allowing time for each resonant switching interval.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
With the oscillator capable of operating in excess of 600 kHz, overall output switching frequencies to 300 kHz are practical. In addition to the standard free running mode, with the CLKSYNC pin, the user may configure the UC3879 to accept an external clock synchronization signal. Alternatively, up to three units can be locked together with the operational frequency determined by the fastest device.
Protective features include an undervoltage lockout and overcurrent protection. Additional features include a 10-MHz error amplifier, a 5-V precision reference, and soft start. The UC3879 is available in 20 pin N, J, DW, and Q and 28 pin L packages.
PARAMETER Supply voltage (VC, VIN) Output current, source or sink, dc Output current, source, sink peak for µs at max frequency of 300 kHz Analog inputs
(1) Pin references are to 20-pin DIL and SOIC packages. All voltages are with respect to ground unless otherwise stated. Currents are positive into, negative out of the specified terminal.
over operating free-air temperature range (unless otherwise noted)(1) JC data values stated were derived from MIL-STD-1835B. MIL-STD-1835B states "The baseline values shown are worst case (mean +2s) for x 60 mil microcircuit device silicon die and aplicable for devices with die sizes to 14400 square mils. For devices die sizes greater than 14400 square mils use the following values; dual-in-line, 11°C/W; flat pacl 10°C/W; pin grid array, 10°C/W".
(2) Specified JA (junction-to-ambient) is for devices mounted FR4 PC board with one ounce copper wire where noted. When resistance range is given, lower values are for 5-in2 aluminum PC board. Test PWB was 0.062 in thick and typically used 0.635-mm
trace widths for power packages and 1.3-mm trace widths for non-power packages with x 100 mil probe land area at the end of
each trace. (3) JC estimated for backside of device, through the metalized thermal conduction pads.Some Part number from the same manufacture
Same catergory
204 buyer reviews from Australia
Paul
Length of registration:14 years
nicely packaged and on time
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10/12/2022
Prasad
Length of registration:3 years
Product as described great quality and fast delivery recommend!!
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09/28/2022
Harry Tan
Length of registration:1 years
As described, good service, A+++
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04/07/2017
Steve Alford
Length of registration:6 years
Very good service, fast delivery Thank you
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03/30/2017
thomas Nguyen
Length of registration:7 years
great service, thank you
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12/08/2016
Ray Lockhart
Length of registration:13 years
it arrived and is original
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12/01/2016
Garth James
Length of registration:7 years
Look good.
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11/22/2016
Osman Mehmed
Length of registration:12 years
Excellent
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11/05/2016
Lennod Greene
Length of registration:1 years
Thanks
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10/20/2016
John Sobon
Length of registration:10 years
Top and excellent service as always!
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10/13/2016
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UC2879DWTR
UC2879DWTR has several brands around the world that may have alternate names for UC2879DWTR due to regional differences or acquisition. UC2879DWTR may also be known as the following names:
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