UC3875 Status: ACTIVE

Phase Shift Resonant Controller


      
         
Alert me about changes<br/>to this product

See Also

  • UCC3895 - This device has SIMILAR FUNCTIONALITY, newer device with better features

Datasheet

Download - PDF Icon

 UC1875 
TopologyFull-Bridge  
Control MethodCurrent Mode, Voltage Mode  
Duty Cycle(Max)(%)100  
PWM Outputs(#)4  
Frequency(Max)(kHz)1000  
UVLO Thresholds On/Off(V)10/7/9.2  
Pin/Package20CDIP, 28LCCC  
Regulated Outputs(#)4  
 Samples
 Inventory

Other qualified versions of UC3875

Version Part Number Definition
Military UC1875 QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UCC3895: BiCMOS Advanced Phase Shift PWM Controller
  • UC3879: Phase Shift Resonant Controller
  • UCC25600: 8-Pin High-Performance Resonant Mode Controller
  • TPS74401: Single Output LDO, 3.0A, Adj.(0.8 to 3.3V), Fast Transient Response, Programmable SoftStart
  • TPS5430: 5.5V to 36V, 3A, 500kHz Step Down SWIFT™ Converter
  • TPS54386: Dual 3A Non-Synchronous Buck Converter with Integrated High Side MOSFET, 600 kHz

More Related Products

Product Information

Features

  • Zero to 100% Duty Cycle Control
  • Programmable Output Turn-On Delay
  • Compatible with Voltage or Current Mode Topologies
  • Practical Operation at Switching Frequencies to 1MHz
  • Four 2A Totem Pole Outputs
  • 10MHz Error Amplifier
  • Undervoltage Lockout
  • Low Startup Current—150µA
  • Outputs Active Low During UVLO
  • Soft-Start Control
  • Latched Over-Current Comparator With Full Cycle Restart
  • Trimmed Reference

Description

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 0°C to 70°C and –25°C to +85°C temperature ranges; and in hermetically sealed cerdip, and surface mount packages for –55°C to +125°C operation.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC3875DWPACTIVE0 to 705.35 | 1kuSOIC (DW) | 28 View 20 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3875DWPG4ACTIVE0 to 705.35 | 1kuSOIC (DW) | 28 View 20 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3875DWPTRACTIVE0 to 704.95 | 1kuSOIC (DW) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3875DWPTR/81316OBSOLETE  SOIC (DW) | 28 View    Not Available
UC3875DWPTR81316G4OBSOLETE  SOIC (DW) | 28 View    Not Available
UC3875DWPTRG4ACTIVE0 to 704.95 | 1kuSOIC (DW) | 28 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3875NACTIVE0 to 705.35 | 1kuPDIP (N) | 20 View 20 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3875NG4ACTIVE0 to 705.35 | 1kuPDIP (N) | 20 View 20 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3875QPACTIVE0 to 706.30 | 1kuPLCC (FN) | 28 View 37 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.

Inventory

Reported Distributor Inventory as of 9:43 AM GMT, 06 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC3875DWP
AmericasArrow 689
Avnet 295
Newark 24
Rochester Electronics >1k
AsiaFarnell Asia 24
WPI 75
EuropeArrow Southern Europe 20
WorldwideDigiKey 376
TI Lead Time*: 20 WeeksUC3875DWPG4
AsiaFarnell Asia 19
EuropeFarnell 7
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3875DWPTR
AmericasRochester Electronics >1k
WorldwideDigiKey  Available
Call**UC3875DWPTR/81316
AmericasRochester Electronics >1k
TI Lead Time*: 20 WeeksUC3875DWPTRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC3875N
AmericasArrow 89
Avnet 381
Newark 560
AsiaWPI 208
EuropeCompel 300
WorldwideDigiKey 348
Mouser Electronics 262
TI Lead Time*: 20 WeeksUC3875NG4
AsiaFarnell Asia 99
EuropeFarnell 99
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksUC3875QP
AmericasArrow 17
Rochester Electronics 3
View all Distributors  

** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.

Quality & Lead (Pb)-Free Data

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
UC3875DWP RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3875DWPG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3875DWPTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3875DWPTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3875N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3875NG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3875QP RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView

* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.

If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.

Technical Documents

Most useful technical documents for UC3875 Help

Datasheet

Application Notes

Tools & Software

NamePart # Company Tool / Software Type
UCC3895 Evaluation ModuleUCC3895EVM-001Texas InstrumentsDevelopment Boards/EVMs

Part # Name Product Family Comments
UCC3895   BiCMOS Advanced Phase Shift PWM Controller   AC/DC AND DC/DC POWER SUPPLIES - PWM POWER SUPPLY CONTROLLERS   This device has SIMILAR FUNCTIONALITY, newer device with better features  
Customers Who Evaluated This Product Also Evaluated...
UCC3895 BiCMOS Advanced Phase Shift PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC3879 Phase Shift Resonant Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC25600 8-Pin High-Performance Resonant Mode Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC2895 BiCMOS Advanced Phase Shift Resonant Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1875 Phase Shift Resonant Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS74401 Single Output LDO, 3.0A, Adj.(0.8 to 3.3V), Fast Transient Response, Programmable SoftStart LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TPS5430 5.5V to 36V, 3A, 500kHz Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
TPS54386 Dual 3A Non-Synchronous Buck Converter with Integrated High Side MOSFET, 600 kHz DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
TPS767D301 Dual-Output Low-Dropout (LDO) Voltage Regulators LINEAR REGULATORS-DUAL CHANNEL LDO TI customers also evaluated this product.
BQ24103 Standalone Synchronous Switch-mode Li-Ion Charger w/2A FET in QFN-20, 1- or 2-cell BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
TPS51116 DDR1, DDR2, DDR3 Switcher and LDO NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
REF5040 Low Noise, Very Low Drift, Precision VOLTAGE REFERENCE VOLTAGE REFERENCE-SERIES VOLTAGE REFERENCE TI customers also evaluated this product.
BQ20Z95 SBS 1.1-Compliant Gas Gauge Enabled w/Impedance Track BATTERY MANAGEMENT-BATTERY FUEL GAUGES TI customers also evaluated this product.
TPS61085 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter with Forced PWM Mode DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-UP REGULATORS TI customers also evaluated this product.
TPS61202 0.3V Input Voltage Boost Converter with 1.3A Switches and 'Down Mode' in a 3x3 QFN DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-UP REGULATORS TI customers also evaluated this product.

Support and Community

Customer Tags Help

Most Popular Tags for UC3875:

View All Tags

Other Support



Click Here