Phase Shift Resonant Controller

The UC1875 family of integrated circuits implements control of a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, allowing constant frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance at high frequencies. This family of circuits may be configured to provide control in either voltage or current mode operation, with a separate over-current shutdown for fast fault protection. A programmable time delay is provided to insert a dead-time at the turn-on of each output stage. This delay, providing time to allow the resonant switching action, is independently controllable for each output pair (A-B, C-D). With the Oscillator capable of operation at frequencies in excess of 2MHz, overall switching frequencies to 1MHz are practical. In addition to the standard free running mode, with the CLOCKSYNC pin, the user may configure these devices to accept an external Clock synchronization signal, or may lock together up to 5 units with the operational frequency determined by the fastest device. Protective features include an undervoltage lockout which maintains all outputs in an active-low state until the supply reaches a 10.75V threshold. 1.5V hysteresis is built in for reliable, boot-strapped chip supply. Over-current protection is provided, and will latch the outputs in the OFF state within 70nsec of a fault. The current-fault circuitry implements full-cycle restart operation.
Additional features include an error Amplifier with band-width in excess of 7MHz, a 5V reference, provisions for soft-starting, and flexible ramp generation and slope compensation circuitry.
These devices are available in 20-pin DIP, 28-pin "bat-wing" SOIC and 28 lead power PLCC plastic packages for operation over both 0C to 70C and ?25C to +85C temperature ranges; and in hermetically sealed cerdip, and surface mount packages for ?55C to +125C operation.
By Texas Instruments
Part Manufacturer Description Datasheet Samples
UC3875N Texas Instruments Phase Shift Resonant Controller 20-PDIP 0 to 70
UC3875DWPTR Texas Instruments Phase Shift Resonant Controller 28-SOIC 0 to 70
UC3875DWPTR81316G4 Texas Instruments Phase Shift Resonant Controller 28-SOIC
UC3875DWPTRG4 Texas Instruments 3A SWITCHING CONTROLLER, 2000kHz SWITCHING FREQ-MAX, PDSO28, GREEN, PLASTIC, SOIC-28
UC3875QP Texas Instruments Phase Shift Resonant Controller 28-PLCC 0 to 70
UC3875NG4 Texas Instruments Phase Shift Resonant Controller 20-PDIP 0 to 70
UC3875DWP Texas Instruments Phase Shift Resonant Controller 28-SOIC 0 to 70
UC3875DWPG4 Texas Instruments Phase Shift Resonant Controller 28-SOIC 0 to 70
UC3875DWPTR/81316 Texas Instruments Phase Shift Resonant Controller 28-SOIC
UC3875 's PackagesUC3875 's pdf datasheet
UC3875DWP SOIC
UC3875DWPG4 SOIC
UC3875DWPTR SOIC
UC3875DWPTRG4 SOIC
UC3875N PDIP
UC3875NG4 PDIP
UC3875QP PLCC




UC3875 Pinout, Pinouts
UC3875 pinout,Pin out
This is one package pinout of UC3875,If you need more pinouts please download UC3875's pdf datasheet.

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