UC2879DW
ActiveENHANCED BIPOLAR PHASE SHIFTED FULL BRIDGE CONTROLLER WITH SELECTABLE UVLO, -40°C TO 85°C
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UC2879DW
ActiveENHANCED BIPOLAR PHASE SHIFTED FULL BRIDGE CONTROLLER WITH SELECTABLE UVLO, -40°C TO 85°C
Technical Specifications
Parameters and characteristics for this part
| Specification | UC2879DW |
|---|---|
| Control Features | Frequency Control, Soft Start, Sync |
| Duty Cycle | 50 % |
| Fault Protection | Current Limiting |
| Frequency - Switching | 300 kHz |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Isolation | Non-Isolated |
| Package / Case | 20-SOIC |
| Package / Case [y] | 0.295 in |
| Package / Case [y] | 7.5 mm |
| Supplier Device Package | 20-SOIC |
| Topology | Full-Bridge |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Bulk | 36 | $ 8.42 | |
| Tube | 1 | $ 10.73 | ||
| 10 | $ 9.87 | |||
| 25 | $ 9.46 | |||
| 100 | $ 8.33 | |||
| 250 | $ 7.92 | |||
| 500 | $ 7.41 | |||
| 1000 | $ 6.80 | |||
| Texas Instruments | TUBE | 1 | $ 11.36 | |
| 100 | $ 9.26 | |||
| 250 | $ 7.28 | |||
| 1000 | $ 6.17 | |||
Description
General part information
UC2879 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.
Documents
Technical documentation and resources