Texas Instruments UC3854AN
- Part Number:
- UC3854AN
- Manufacturer:
- Texas Instruments
- Ventron No:
- 3262095-UC3854AN
- Description:
- Enhanced bipolar CCM PFC controller with 16V/10V UVLO for 50Hz-400Hz line freq., 0°C to 70°C
- ECAD Model:
-
- Datasheet:
- uc3854a
Description
The circuit in Figure 1 can be used effectively to clamp the maximum duty cycle of a PWM controller. It is a simple delay circuit that consists of ten passive components, a diode, LM311 comparator, and a MOSFET driver. Note that there are two holdup/bypass capacitors for the UC3705 and the LM311 that are not shown in Figure 1.
Features
Clamps the maximum duty cycle of a PWM controller
Simple delay circuit with only ten passive components, a diode, LM311 comparator, and a MOSFET driver
Ensures transformer reset in power supply applications using current sense transformers
Applications
Power supply applications using current sense transformers
The circuit in Figure 1 can be used effectively to clamp the maximum duty cycle of a PWM controller. It is a simple delay circuit that consists of ten passive components, a diode, LM311 comparator, and a MOSFET driver. Note that there are two holdup/bypass capacitors for the UC3705 and the LM311 that are not shown in Figure 1.
Features
Clamps the maximum duty cycle of a PWM controller
Simple delay circuit with only ten passive components, a diode, LM311 comparator, and a MOSFET driver
Ensures transformer reset in power supply applications using current sense transformers
Applications
Power supply applications using current sense transformers
Texas Instruments UC3854AN technical specifications, attributes, parameters and parts with similar specifications to Texas Instruments UC3854AN.
- Factory Lead Time6 Weeks
- Lifecycle StatusACTIVE (Last Updated: 6 days ago)
- Mounting TypeThrough Hole
- Package / Case16-DIP (0.300, 7.62mm)
- Surface MountNO
- Number of Pins16
- Weight1.053808g
- Operating Temperature0°C~70°C
- PackagingTube
- Tolerance1%
- JESD-609 Codee4
- Pbfree Codeyes
- Part StatusActive
- Moisture Sensitivity Level (MSL)1 (Unlimited)
- Number of Terminations16
- ECCN CodeEAR99
- Terminal FinishNickel/Palladium/Gold (Ni/Pd/Au)
- SubcategorySwitching Regulator or Controllers
- TechnologyBIPOLAR
- Voltage - Supply10V~20V
- Terminal PositionDUAL
- Number of Functions1
- Supply Voltage18V
- Terminal Pitch2.54mm
- Frequency200kHz
- Base Part NumberUC3854
- Pin Count16
- Number of Outputs1
- Output Voltage12.8V
- Input Voltage-Nom18V
- Supply Voltage-Max (Vsup)20V
- Operating Supply Current12mA
- Power Dissipation1W
- Output Current1.2A
- Max Supply Current18mA
- Input Voltage (Max)20V
- Control TechniquePULSE WIDTH MODULATION
- Reference Voltage7.5V
- Switcher ConfigurationBOOST
- ModeAverage Current
- Current - Startup250μA
- Height5.08mm
- Length19.3mm
- Width6.35mm
- Thickness3.9mm
- Radiation HardeningNo
- REACH SVHCNo SVHC
- RoHS StatusROHS3 Compliant
- Lead FreeLead Free
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