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Updated at 02/11/2025 10:30:15(UTC+8)

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Description

The UC3825N is a High Speed Pulse Width Modulation (PWM) Controller designed for high frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward. Protection circuitry includes a current limit comparator with a 1V threshold, a TTL compatible shutdown port and a soft start pin which will double as a maximum duty cycle clamp. The logic is fully latched to provide jitter free operation and prohibit multiple pulses at an output. An under-voltage lockout section with 800mV of hysteresis assures low start up current. During under-voltage lockout, the outputs are high impedance.
Green product and no Sb/Br
Compatible with voltage or current mode topologies
High current dual totem pole outputs
Wide bandwidth error amplifier
Fully latched logic with double pulse suppression
Pulse-by-pulse current limiting
Soft start/max duty cycle control
Under-voltage lockout with hysteresis

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UC3825N Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Through Hole
Number of Pins	16 Pin
Case/Package	PDIP-16
Frequency	1 MHz
Supply Voltage (DC)	10.0V (min)
Operating Voltage	9.2V ~ 30V
Power Rating	1 W
Number of Outputs	2 Output
Input Voltage (DC)	15.0 V
Output Voltage	5.1 V
Output Current	200 mA
Supply Current	33 mA
Number of Channels	2 Channel
Number of Positions	16 Position
Input Current	22.0 mA
Power Dissipation	1 W
Number of Regulated Outputs	2 Output
Rise Time	30 ns
Switching Frequency	340kHz ~ 460kHz
Topology	Buck, Boost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull
Duty Cycle	85 %
Maximum Duty Cycle	85 %
Fall Time	30 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Power Dissipation (Max)	1000 mW
Supply Voltage	8.4.30 VDC
Supply Voltage (Max)	30 V
Supply Voltage (Min)	10 V
Input Voltage	15 V
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Size-Length	19.3 mm
Size-Width	6.35 mm
Size-Height	4.57 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	2015/06/15
ECCN Code	EAR99

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