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UC3879DW ACTIVE

Enhanced bipolar phase shifted full bridge controller with selectable UVLO, 0°C to 70°C

Same as: UC3879DWG4   This part number is identical to the part number listed above. You can only order quantities of the part number listed above.

US ECCN: EAR99 US/Local Export Classification Number

Quality information

RoHS Yes
REACH Yes
Lead finish / Ball material NIPDAU
MSL rating / Peak reflow Level-2-260C-1 YEAR
Quality, reliability
& packaging information

Information included:

  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
View or download

Packaging information

Package | Pins Package qty | Carrier: Operating temperature range (°C)
SOIC (DW) | 20 25 | TUBE 0 to 70
Package | Pins SOIC (DW) | 20
Package qty | Carrier: 25 | TUBE
Operating temperature range (°C) 0 to 70
View TI packaging information

Features for the UC3879

  • Programmable Output Turn On Delay; Zero Delay Available
  • Compatible with Voltage Mode orCurrent Mode Topologies
  • Practical Operation at Switching Frequencies to 300 kHz
  • 10-MHz Error Amplifier
  • Pin Programmable Undervoltage Lockout
  • Low Startup Current — 150 µA
  • Soft Start Control
  • Outputs Active Low During UVLO

Description for the UC3879

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.

Pricing


Qty Price (USD)
1-99 8.596
100-249 7.008
250-999 5.508
1,000+ 4.672

Additional package qty | carrier options

Package qty | Carrier 2,000 | LARGE T&R
Inventory Out of stock
Qty | Price (USD) 1ku | 3.893 1-99 7.163 100-249 5.84 250-999 4.59 1,000+ 3.893