UC3845BDG - ON Semiconductor

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

UC3845BDG
Manufacturer

ON Semiconductor
ChipWorker Part#

CW12106621
Category

Voltage Regulator
Package

SOIC-14
Description

UC3845BDG, PWM Current Mode Controller, 1A, 275kHz, 30V, 14Pin SOIC
Documentation

Datasheet

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UC3845BDG Specifications

Attribute	Attribute Value

Part Number	UC3845BDG
Manufacturer	ON Semiconductor
ChipWorker Part#	CW12106621
Category	Voltage Regulator
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	14 Pin
Case/Package	SOIC-14
Frequency	52 kHz
Supply Voltage (DC)	12.0V (min)
Halogen Free Status	Halogen Free
Number of Outputs	1 Output
Input Voltage (DC)	30.0 V
Output Voltage	13.4 V
Output Current	200 mA
Supply Current	12 mA
Number of Positions	14 Position
Power Dissipation	862 mW
Rise Time	50 ns
Switching Frequency	500 kHz
Topology	Flyback, Forward, Step-Up, Step-Down
Duty Cycle	48 %
Maximum Duty Cycle	48 %
Fall Time	50 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Power Dissipation (Max)	862 mW
Supply Voltage	7.6V ~ 36V
Supply Voltage (Max)	25 V
Supply Voltage (Min)	12 V
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Size-Length	8.75 mm
Size-Width	4 mm
Size-Height	1.5 mm
Operating Temperature	0℃ ~ 70℃ (TA)
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/12/17
ECCN Code	EAR99

Product Description

The UC3845BDG is a high-performance fixed frequency current-mode Pulse Width Modulation (PWM) Controller specifically designed for off-line and DC to DC converter applications offering the designer a cost-effective solution with minimal external components. It features 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%.
Trimmed oscillator for precise frequency control
Automatic feed forward compensation
Internally trimmed reference with undervoltage lockout
High current totem pole output
Undervoltage lockout with hysteresis
Low startup and operating current

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