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UC3845BD1R2G Integrated Circuit Chip High Performance Current Modded Controllers

Minimum Order Quantity : 10pcs Price : negotiation
Packaging Details : 2500/REEL Delivery Time : in stock 2-3days
Payment Terms : T/T, Western Union ,paypal Supply Ability : 10000PCS
Place of Origin: CHINA Brand Name: ON
Certification: CE/ RoHS Model Number: UC3845BD1R2G

Detail Information

Total Power Supply And Zener Current: 30mA Output Current, Source Or Sink (Note 1): 1.0A
Output Energy (Capacitive Load Per Cycle): 5.0UJ Current Sense And Voltage Feedback Inputs: − 0.3 To + 5.5 V
Voltage - Supply (Vcc/Vdd): 7.6 V ~ 30 V Frequency - Switching: 500kHz
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Product Description

UC3845BD1R2G ON IC Integrated Circuit CHIP High Performance Current Mode Controllers

 

High Performance  Current Mode Controllers


     The UC3844B, UC3845B series are high performance fixed  frequency current mode controllers. They are specifically designed for  Off−Line and dc−dc converter applications offering the designer a cost−effective solution with minimal external components. These integrated circuits feature an oscillator, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.


      Also included are protective features consisting of input and reference undervoltage lockouts each with hysteresis, cycle−by−cycle current limiting, a latch for single pulse metering, and a flip−flop which blanks the output off every other oscillator cycle, allowing output deadtimes to be programmed from 50% to 70%.


      These devices are available in an 8−pin dual−in−line and surface mount (SOIC−8) plastic package as well as the 14−pin plastic surface mount (SOIC−14). The SOIC−14 package has separate power and ground pins for the totem pole output stage.


      The UCX844B has UVLO thresholds of 16 V (on) and 10 V (off), ideally suited for off−line converters. The UCX845B is tailored for  lower voltage applications having UVLO thresholds of 8.5 V (on) and 7.6 V (off).

 


Features
• Pb−Free Packages are Available
• Trimmed Oscillator for Precise Frequency Control
• Oscillator Frequency Guaranteed at 250 kHz
• Current Mode Operation to 500 kHz Output Switching Frequency
• Output Deadtime Adjustable from 50% to 70%
• Automatic Feed Forward Compensation
• Latching PWM for Cycle−By−Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current

 

 

Product Attributes Select All
Manufacturer ON Semiconductor
Series -
Packaging Tape & Reel (TR)
Part Status Active
Output Type Transistor Driver
Function Step-Up, Step-Up/Step-Down
Output Configuration Positive or Negative, Isolation Capable
Topology Boost, Flyback
Number of Outputs 1
Output Phases 1
Voltage - Supply (Vcc/Vdd) 7.6 V ~ 30 V
Frequency - Switching 500kHz
Duty Cycle (Max) 0.48
Synchronous Rectifier No
Clock Sync No
Serial Interfaces -
Control Features Frequency Control
Operating Temperature 0°C ~ 70°C (TA)
Package / Case 8-SOIC (0.154", 3.90mm Width)
Supplier Device Package 8-SOIC
Base Part Number UC384*B

 

 

UC3845BD1R2G Integrated Circuit Chip High Performance Current Modded Controllers 0UC3845BD1R2G Integrated Circuit Chip High Performance Current Modded Controllers 1

 

UC3845BD1R2G Integrated Circuit Chip High Performance Current Modded Controllers 2

 

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