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Updated at 17/06/2025 10:30:15(UTC+8)

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Description

The UC3842BN is a high performance current mode PWM Controller IC 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.
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 under-voltage lockout
High current totem pole output
Under voltage lockout with hysteresis
Low start-up and operating current

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UC3842BN Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	8 Pin
Case/Package	DIP-8
Frequency	250 kHz
Supply Voltage (DC)	12.0V (min)
Operating Voltage	10V ~ 36V
Number of Outputs	1 Output
Input Voltage (DC)	25.0 V
Output Voltage	5.1 V
Output Current	200 mA
Supply Current	17 mA
Number of Channels	1 Channel
Number of Positions	8 Position
Power Dissipation	1.25 W
Quiescent Current	12.0 mA
Rise Time	50 ns
Switching Frequency	500 kHz
Duty Cycle	100 %
Output Current (Max)	1 A
Maximum Duty Cycle	100 %
Fall Time	50 ns
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-25 ℃
Power Dissipation (Max)	1250 mW
Supply Voltage	16.36 V
Supply Voltage (Max)	25 V
Supply Voltage (Min)	12 V
Input Voltage	15 V
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Size-Length	10.92 mm
Size-Width	6.6 mm
Size-Height	3.32 mm
Operating Temperature	0℃ ~ 70℃
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

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