UC3879DWTR

LTB

Texas Instruments

ENHANCED BIPOLAR PHASE SHIFTED FULL BRIDGE CONTROLLER WITH SELECTABLE UVLO, 0°C TO 70°C

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Search across all available documentation for this part.

DocumentsDatasheet Phase Shift Resonant Controller datasheet (Rev. B)

UC3879DWTR

LTB

Texas Instruments

ENHANCED BIPOLAR PHASE SHIFTED FULL BRIDGE CONTROLLER WITH SELECTABLE UVLO, 0°C TO 70°C

Deep-Dive with AI

DocumentsDatasheet Phase Shift Resonant Controller datasheet (Rev. B)

Specifications Pricing Series Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC3879DWTR

Clock Sync	True
Control Features	Frequency Control, Ramp, Soft Start
Duty Cycle (Max) [Max]	50 %
Frequency - Switching [Max]	300 kHz
Function	Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	4
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	20-SOIC
Package / Case [y]	0.295 in
Package / Case [y]	7.5 mm
Supplier Device Package	20-SOIC
Synchronous Rectifier	True
Topology	Half-Bridge
Voltage - Supply (Vcc/Vdd) [Max]	20 V
Voltage - Supply (Vcc/Vdd) [Min]	9 V

UC3879 Series

Part	Supplier Device Package	Output Configuration	Package / Case	Package / Case [y]	Package / Case [y]	Number of Outputs	Mounting Type	Output Phases	Duty Cycle (Max) [Max]	Output Type	Topology	Function	Voltage - Supply (Vcc/Vdd) [Max]	Voltage - Supply (Vcc/Vdd) [Min]	Frequency - Switching [Max]	Operating Temperature [Max]	Control Features
Texas Instruments UC3879DW	20-SOIC	Positive	20-SOIC	0.295 in	7.5 mm	4	Surface Mount	1	50 %	Transistor Driver	Half-Bridge	Step-Up/Step-Down	20 V	9 V	300 kHz	70 °C	Frequency Control Ramp Soft Start
Texas Instruments UC3879DWTR	20-SOIC	Positive	20-SOIC	0.295 in	7.5 mm	4	Surface Mount	1	50 %	Transistor Driver	Half-Bridge	Step-Up/Step-Down	20 V	9 V	300 kHz	70 °C	Frequency Control Ramp Soft Start
Texas Instruments UC3879DWG4	20-SOIC	Positive	20-SOIC	0.295 in	7.5 mm	4	Surface Mount	1	50 %	Transistor Driver	Half-Bridge	Step-Up/Step-Down	20 V	9 V	300 kHz	70 °C	Frequency Control Ramp Soft Start

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Tape & Reel (TR)	2000	$ 5.88
Texas Instruments	LARGE T&R	1	$ 8.74
		100	$ 7.12
		250	$ 5.60
		1000	$ 4.75

Description

General part information

UC3879 Series

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.