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Datasheet Texas Instruments UCC3895DWTR

Datasheet Texas Instruments UCC3895DWTR

ManufacturerTexas Instruments
Part NumberUCC3895DWTR

BiCMOS Advanced Phase Shift PWM Controller 20-SOIC 0 to 70


  • Download » Datasheet PDF, 1.7 Mb, Revision: P, File published: Jun 21, 2013
    UCC1895, UCC2895, UCC3895 BiCMOS Advanced Phase-Shift PWM Controller datasheet
    Docket ↓
    UCC1895, UCC2895, UCC3895 SLUS157P – DECEMBER 1999 – REVISED JUNE 2013 BiCMOS Advanced Phase-Shift PWM Controller
    Check for Samples: UCC1895, UCC2895, UCC3895 FEATURES DESCRIPTION The UCC3895 is a phase-shift PWM controller that
    implements control of a full-bridge power stage by
    phase shifting the switching of one half-bridge with
    respect to the other. The device allows constant
    frequency pulse-width modulation in conjunction with
    resonant zero-voltage switching to provide high
    efficiency at high frequencies. The part is used either
    as a voltage-mode or current-mode controller. 1 Programmable-Output Turnon Delay
    Adaptive Delay Set
    Bidirectional Oscillator Synchronization
    Voltage-Mode, Peak Current-Mode, or Average
    Current-Mode Control
    Programmable Softstart, Softstop and Chip
    Disable via a Single Pin
    0% to 100% Duty-Cycle Control
    7-MHz Error Amplifier
    Operation to 1 MHz
    Typical 5-mA Operating Current at 500 kHz
    Very Low 150-ОјA Current During UVLO APPLICATIONS While the UCC3895 maintains the functionality of the
    UC3875/6/7/8 family and UC3879, it improves on that
    controller family with additional features such as ...


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Family: UCC1895, UCC2895, UCC3895


Lifecycle StatusActive (Recommended for new designs)
Manufacture's Sample AvailabilityNo


Package TypeDW
Industry STD TermSOIC
Package QTY2000
CarrierLARGE T&R
Device MarkingUCC3895DW
Width (mm)7.5
Length (mm)12.8
Thickness (mm)2.35
Pitch (mm)1.27
Max Height (mm)2.65
Mechanical DataDownload »


Control MethodCurrent,Feedforward,Voltage
Duty Cycle(Max)100 %
Frequency(Max)1000 kHz
Gate Drive(Typ)0.1 A
Operating Temperature Range0 to 70 C
Package GroupSOIC
Special FeaturesError Amplifier,Multi-topology,Soft Start,Soft Switching,Synchronization Pin
TopologyPhase-Shifted Full-Bridge
UVLO Thresholds On/Off11/9 V
Vin(Max)17 V
Vin(Min)9 V

Eco Plan


Design Kits & Evaluation Modules

  • Evaluation Modules & Boards: UCC3895EVM-001
    UCC3895 Evaluation Module
    Lifecycle Status: Active (Recommended for new designs)

Application Notes

  • Download » Application Notes PDF, 70 Kb, File published: Aug 21, 2002
    UCC3895 CD Output Asymmetric Duty Cycle Operation
    A small number of current-mode applications using non?synchronous output stages have experienced asymmetric pulse widths on the OUTC and OUTD outputs of the UCC3895. Applications using synchronous rectification and/or voltage mode control typically do not experience this anomaly. For the cost of a single resistor, a simple fix allows reliable and stable operation of the UCC3895.
  • Download » Application Notes PDF, 393 Kb, File published: Apr 9, 2009
    UCC2895 Layout and Grounding Recommendations
    The UCC2895 family of Phase Shifted Full Bridge Power Converters Control Circuits are designed to provide efficient power conversion with minimal noise generation. This is accomplished by the resonant switching of the primary side voltages, which minimizes the switching losses and the voltage/current transients that would be present in a hard switched conventional full bridge power supply.
  • Download » Application Notes PDF, 293 Kb, File published: Oct 4, 2001
    A Power Management Solution for Efficient, Multiple Output Applications
  • Download » Application Notes PDF, 21 Kb, File published: Feb 22, 2001
    A Comparison Between the BiCMOS UCC3895 Phase Shift Controller and the UC3875
    This application report compares the BiCMOS UCC3895 to its bipolar predecessors, the UC3875/6/7/8 family and the UC3879 controller. All of these integrated circuits provide the control and drive signals needed to implement a full-bridge converter using phase-shifted control. The UCC3895 represents the latest offering in the Texas Instruments line of phase-shift controllers, incorporating a feature
  • Download » Application Notes PDF, 81 Kb, File published: Jan 12, 2001
    DN-63 The Current-Doubler Rectifier: An Alternative Rectification Technique
    The UC3875, UC3879, and UC3895 families of ICs control a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other. This method allows constant-frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance. These ICs can be configured to provide control in either voltage mode or current mode operation, wi
  • Download » Application Notes PDF, 393 Kb, Revision: A, File published: Jan 22, 2011
    Phase Shifted Full Bridge, Zero Voltage Transition Design Considerations (Rev. A)
    This Application Note will highlight the design considerations incurred in a high frequency power supply using the Phase Shifted Resonant PWM control technique. An overview of this switching technique including comparisons to existing fixed frequency non-resonant and variable frequency Zero Voltage Switching is included. Numerous design equations and associated voltage, current and timing waveform
  • Download » Application Notes PDF, 207 Kb, File published: Feb 27, 2003
    Synchronous Rectifiers of a Current Doubler
    Driving a current doubler synchronous rectification output stage can be a very complex task, especially for a phase shifted full bridge topology. However, using the A and B outputs of the UCC3895 along with the UCC37324 dual 4-A MOSFET driver, direct PWM control of a synchronous rectifier current doubler output stage achieves. This technique provides the proper gating and timing signals necessary
  • Download » Application Notes PDF, 116 Kb, File published: Sep 21, 2004
    Current Doubler Rectifier Offers Ripple Current Cancellation

Moldel Line

Series: UCC3895 (11)

Manufacturer's Classification

  • Semiconductors > Power Management > Offline and Isolated DC/DC Controllers and Converters > PWM and Resonant Controller

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