UC2856QDWR

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Texas Instruments

40V, 1.5A CURRENT MODE 1MHZ PWM CONTROLLER , -40C TO 125C

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UC2856QDWR

Active

Texas Instruments

40V, 1.5A CURRENT MODE 1MHZ PWM CONTROLLER , -40C TO 125C

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Description Specifications Series Pricing CAD Documents

Description

General part information

UC2856 Series

The UC3856 is a high performance version of the popular UC3846 series of current mode controllers, and is intended for both design upgrades and new applications where speed and accuracy are important. All input to output delays have been minimized, and the current sense output is slew rate limited to reduce noise sensitivity. Fast 1.5A peak output stages have been added to allow rapid switching of power FETs.

A low impedance TTL compatible sync output has been implemented with a tri-state function when used as a sync input.

Internal chip grounding has been improved to minimize internal \x93noise\x94 caused when driving large capacitive loads. This, in conjunction with the improved differential current sense amplifier results in enhanced noise immunity.

Technical Specifications

Parameters and characteristics for this part

Specification	UC2856QDWR

Clock Sync	Yes
Control Features	Frequency Control, Enable, Soft Start
Duty Cycle (Max)	47 %
Frequency - Switching	200 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Surface Mount
Number of Outputs	2
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	-40 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package Length	0.295 in
Package Name	16-SOIC
Package Width	7.5 mm
Synchronous Rectifier	Yes
Topology	Boost, Full-Bridge, Forward Converter, Half-Bridge, Flyback, Push-Pull
Voltage - Supply (Vcc/Vdd) Maximum	40 V
Voltage - Supply (Vcc/Vdd) Minimum	7 V

UC2856 Series

Automotive 8V to 40V, up to 1MHz current mode PWM controller

Part	Mounting Type	Output Configuration	Output Type	Number of Outputs	Duty Cycle (Max)	Output Phases	Control Features	Clock Sync	Synchronous Rectifier	Function	Frequency - Switching	Package Length	Package Name	Package Width	Operating Temperature (Max)	Operating Temperature (Min)	Voltage - Supply (Vcc/Vdd) Minimum	Voltage - Supply (Vcc/Vdd) Maximum	Topology
Texas Instruments UC2856DW	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856DWTRG4	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856N	Through Hole	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.3 in	16-DIP 16-PDIP	7.62 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856QDWRQ1	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	125 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856DW	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856DWTR	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856NG4	Through Hole	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.3 in	16-DIP 16-PDIP	7.62 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull
Texas Instruments UC2856QDWR	Surface Mount	Positive	Transistor Driver	2	47 %	1	Enable Frequency Control Soft Start	Yes	Yes	Step-Up Step-Up/Step-Down	200 kHz	0.295 in	16-SOIC	7.5 mm	85 °C	-40 °C	7 V	40 V	Boost Flyback Forward Converter Full-Bridge Half-Bridge Push-Pull

Pricing

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CAD

3D models and CAD resources for this part

Documents

Technical documentation and resources

UC2856Q: Improved Current Mode PWM Controller datasheet (Rev. A)