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UC2845B

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UC2845BD [POWER CONTROLLERS & MOTOR DRIVERS ]

other parts : L296_  L295_  L294_  L291_  L200_  L165_  L149_  L290_  L292_  L272_ 

ST-Microelectronics
STMicroelectronics

POWER CONTROLLERS & MOTOR DRIVERS

SINGLE CHIP MULTIPOWER

SOLENOID DRIVERS

DC MOTORS DRIVERS

UNIPOLAR STEPPER MOTORS DRIVERS

BIPOLAR STEPPER MOTORS DRIVERS

BRUSHLESS MOTORS DRIVERS

DEDICATED HARD DISK DRIVE

HIGH CURRENT SWITCHING REGULATORS

PWM CONTROLLERS

POWER TRANSISTOR DRIVER

POWER FACTOR CORRECTORS

MISCELLANEOUS

SMART POWER ACTUATORS

LINEAR REGULATOR SUPERVISOR

POWER DRIVERS

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UC2845BN_ [POWER CONTROLLERS & MOTOR DRIVERS ]

other parts : L296_  L295_  L294_  L291_  L200_  L165_  L149_  L290_  L292_  L272_ 

ST-Microelectronics
STMicroelectronics

POWER CONTROLLERS & MOTOR DRIVERS

SINGLE CHIP MULTIPOWER

SOLENOID DRIVERS

DC MOTORS DRIVERS

UNIPOLAR STEPPER MOTORS DRIVERS

BIPOLAR STEPPER MOTORS DRIVERS

BRUSHLESS MOTORS DRIVERS

DEDICATED HARD DISK DRIVE

HIGH CURRENT SWITCHING REGULATORS

PWM CONTROLLERS

POWER TRANSISTOR DRIVER

POWER FACTOR CORRECTORS

MISCELLANEOUS

SMART POWER ACTUATORS

LINEAR REGULATOR SUPERVISOR

POWER DRIVERS

View
UC2845BD_ [POWER CONTROLLERS & MOTOR DRIVERS ]

other parts : L296_  L295_  L294_  L291_  L200_  L165_  L149_  L290_  L292_  L272_ 

ST-Microelectronics
STMicroelectronics

POWER CONTROLLERS & MOTOR DRIVERS

SINGLE CHIP MULTIPOWER

SOLENOID DRIVERS

DC MOTORS DRIVERS

UNIPOLAR STEPPER MOTORS DRIVERS

BIPOLAR STEPPER MOTORS DRIVERS

BRUSHLESS MOTORS DRIVERS

DEDICATED HARD DISK DRIVE

HIGH CURRENT SWITCHING REGULATORS

PWM CONTROLLERS

POWER TRANSISTOR DRIVER

POWER FACTOR CORRECTORS

MISCELLANEOUS

SMART POWER ACTUATORS

LINEAR REGULATOR SUPERVISOR

POWER DRIVERS

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UC2845B [HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER ]

other parts : UC2842B  UC3845B  UC3844B  UC3843B  UC3842B  UC2844B  UC2843B  UC3844BN  UC2843BN  UC2842BN 

ST-Microelectronics
STMicroelectronics

DESCRIPTION
The UC384xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the offstate.
   
■ TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
■ OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
■ CURRENT MODE OPERATION TO 500kHz
■ 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 START-UP AND OPERATING CURRENT
   

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UC2845B_2008 [High Performance Current Mode Controllers ]

other parts : UC3844B_2008  UC2844B_2008  UC3845B_2008  UC3845BD_2008  UC2844BN_2008  UC3845BN_2008  UC3844BD_2008  UC3845BV_2008  UC3844BN_2008  UC2845BN_2008 

ON-Semiconductor
ON Semiconductor

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.

Features
• 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
• Pb−Free Packages are Available

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UC2845B_2013 [High Performance Current Mode Controllers ]

other parts : UC2844B_2013  UC3844B_2013  UC3845B_2013  UC3845BV_2013  UC3844BV_2013  UC2845BNG_2013  UC3844BNG_2013  UC3845BDG_2013  UC3844BDG_2013  UC3845BNG_2013 

ON-Semiconductor
ON Semiconductor

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.

Features
• 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
• These Devices are Pb−Free and are RoHS Compliant
• NCV Prefix for Automotive and Other Applications Requiring Unique Site and Control Change Requirements; AEC−Q100 Qualified and PPAP Capable

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UC2845B [High Performance Current Mode Controllers ]

other parts : UC3844B  UC2844B  UC3845B  UC3845BD  UC2844BN  UC3845BN  UC3844BD  UC3845BV  UC3844BN  UC2845BN 

ON-Semiconductor
ON Semiconductor

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.

Features
• 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
• Pb−Free Packages are Available

View
UC2845B [High Performance Current Mode Controllers ]

other parts : UC2844B  UC3845B  UC3844B  UC3845BD  UC3844BD  UC2845BN  UC3844BN  UC2845BD  UC2844BN  UC2844BD 

Motorola
Motorola => Freescale

The UC3844B, UC3845B series are high performance fixed frequency current mode controllers. They are specifically designed for Off–Line and dc–to–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.

• 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

View
UC2845BD_2008 [High Performance Current Mode Controllers ]

other parts : UC3845B_2008  UC3844B_2008  UC2844B_2008  UC2845B_2008  UC3845BD_2008  UC3845BN_2008  UC3844BD_2008  UC3844BN_2008  UC2845BN_2008  UC2844BN_2008 

ON-Semiconductor
ON Semiconductor

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.

Features
• 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
• Pb−Free Packages are Available

View
UC2845BD [High Performance Current Mode Controllers ]

other parts : UC3845B  UC3844B  UC2844B  UC2845B  UC3845BD  UC3845BN  UC3844BD  UC3844BN  UC2845BN  UC2844BN 

ON-Semiconductor
ON Semiconductor

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.

Features
• 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
• Pb−Free Packages are Available

View
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