UC3844BNG - ON Semiconductor

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

Part No

UC3844BNG
Manufacturer

ON Semiconductor
ChipWorker Part#

CW6322748
Category

PWM Controller IC
Package

PDIP-8
Description

Current Mode PWM Controller 1A 500kHz 8Pin PDIP Tube
Documentation

Datasheet

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UC3844BNG Specifications

Attribute	Attribute Value

Part Number	UC3844BNG
Manufacturer	ON Semiconductor
ChipWorker Part#	CW6322748
Category	PWM Controller IC
Documentation	Datasheet
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	PDIP-8
Frequency	250 kHz
Supply Voltage (DC)	12.0V (min)
Operating Voltage	10V ~ 36V
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	17 mA
Number of Positions	8 Position
Power Dissipation	1.25 W
Threshold Voltage	17.5 V
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)	1250 mW
Supply Voltage	36 V
Supply Voltage (Max)	25 V
Supply Voltage (Min)	12 V
Input Voltage	5.5 V
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Size-Length	10.16 mm
Size-Width	6.6 mm
Size-Height	3.44 mm
Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
ECCN Code	EAR99
HK STC License	NLR

Product Description

The UC3844BNG 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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