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

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Description

DESCRIPTION
The UC1875 family of integrated circuits implements control of a bridge power stage by phase-shifting the switching of one half-bridge with respect to the other, allowing constant frequency pulse-width modulation in combination with resonant, zero-voltage switching for high efficiency performance at high frequencies. This family of circuits may be configured to provide control in either voltage or current mode operation, with a separate over-current shutdown for fast fault protection.
FEATURES
•Zero to 100% Duty Cycle Control
•Programmable Output Turn-On Delay
•Compatible with Voltage or Current Mode Topologies
•Practical Operation at Switching Frequencies to 1MHz
•Four 2A Totem Pole Outputs
•10MHz Error Amplifier
•Undervoltage Lockout
•Low Startup Current –150µA
•Outputs Active Low During UVLO
•Soft-Start Control
•Latched Over-Current Comparator With Full Cycle Restart
•Trimmed Reference

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UC3875DWP Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	28 Pin
Case/Package	SOIC-28
Frequency	1 MHz
Supply Voltage (DC)	11.0V (min)
Operating Voltage	10.75V ~ 20V
Number of Outputs	4 Output
Input Voltage (DC)	20.0 V
Output Voltage	1.7 V
Output Current	500 mA
Number of Channels	4 Channel
Switching Frequency	1000 kHz
Duty Cycle	100 %
Maximum Duty Cycle	100 %
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Supply Voltage	9.5.20 VDC
Supply Voltage (Max)	20 V
Supply Voltage (Min)	11 V
Input Voltage	20 V
	Show
Size-Length	18 mm
Size-Width	7.52 mm
Size-Height	2.35 mm
Operating Temperature	0℃ ~ 70℃
Product Lifecycle Status	Active
Packaging	Tube
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

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