Texas Instruments UC2879DW
- Part Number:
- UC2879DW
- Manufacturer:
- Texas Instruments
- Ventron No:
- 3246703-UC2879DW
- Description:
- Enhanced bipolar phase shifted full bridge controller with selectable UVLO, -40°C to 85°C
- Datasheet:
- uc2879
- TopologyPhase-shifted full bridge
- Control modeCurrent
- Duty cycle (max) (%)100
- Switching frequency (max) (kHz)300
- FeaturesAdjustable switching frequency
- UVLO thresholds on/off (V)10.75/9
- Operating temperature range (°C)-40 to 85
- RatingCatalog
- Gate drive (typ) (A)0.1
- Vin (max) (V)20
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.
Soft Sw PWM Cntrlr 4-OUT PH SHIFT RES 300KHz 20-Pin SOIC Tube
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Enhanced bipolar phase shifted full bridge controller with selectable UVLO, -40°C to 85°C 20-SOIC -40 to 85
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TEXAS INSTRUMENTS,UC2879DW
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