Integrated Circuits (ICs)

UC3846J

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Texas Instruments

SWITCHING CONTROLLER

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Integrated Circuits (ICs)

UC3846J

Active

Texas Instruments

SWITCHING CONTROLLER

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Specifications Series Pricing Description Documents

Technical Specifications

Parameters and characteristics for this part

Specification	UC3846J

Clock Sync	True
Control Features	Enable, Soft Start, Frequency Control, Current Limit
Duty Cycle (Max) [Max]	50 %
Frequency - Switching	500 kHz
Function	Step-Up, Step-Up/Step-Down
Mounting Type	Through Hole
Number of Outputs	2
Operating Temperature [Max]	70 °C
Operating Temperature [Min]	0 °C
Output Configuration	Positive
Output Phases	1
Output Type	Transistor Driver
Package / Case	7.62 mm, 0.3 in
Package / Case	16-CDIP
Supplier Device Package	16-CDIP
Synchronous Rectifier	True
Topology	Forward Converter, Half-Bridge, Push-Pull, Flyback, Boost
Voltage - Supply (Vcc/Vdd) [Max]	40 V
Voltage - Supply (Vcc/Vdd) [Min]	6.95 V

UC3846 Series

Dual ended 500KHz current mode PWM controller, 0C to 70C

Part	Supplier Device Package	Frequency - Switching	Topology	Voltage - Supply (Vcc/Vdd) [Min]	Voltage - Supply (Vcc/Vdd) [Max]	Control Features	Mounting Type	Output Phases	Number of Outputs	Output Configuration	Package / Case [x]	Package / Case	Package / Case [y]	Output Type	Duty Cycle (Max) [Max]	Operating Temperature [Max]	Function	Package / Case	Package / Case	Package / Case
Texas Instruments UC3846DWTR	16-SOIC	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Surface Mount	1	2	Positive	0.295 in	16-SOIC	7.5 mm	Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down
Texas Instruments UC3846Q	20-PLCC (9x9)	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Surface Mount	1	2	Positive		20-LCC (J-Lead)		Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down
Texas Instruments UC3846DW	16-SOIC	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Surface Mount	1	2	Positive	0.295 in	16-SOIC	7.5 mm	Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down
Texas Instruments UC3846N	16-PDIP	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Through Hole	1	2	Positive		16-DIP		Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down	0.3 in	7.62 mm
Texas Instruments UC3846DWTRG4	16-SOIC	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Surface Mount	1	2	Positive	0.295 in	16-SOIC	7.5 mm	Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down
Texas Instruments UC3846J	16-CDIP	500 kHz	Boost Flyback Forward Converter Half-Bridge Push-Pull	6.95 V	40 V	Current Limit Enable Frequency Control Soft Start	Through Hole	1	2	Positive		16-CDIP		Transistor Driver	50 %	70 °C	Step-Up Step-Up/Step-Down			0.3 in 7.62 mm

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Bulk	25	$ 12.43

Description

General part information

UC3846 Series

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

Documents

Technical documentation and resources

No documents available