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

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Description

The UCC3803D is a low-power BiCMOS current-mode Pulse Width Modulation (PWM) Controller contains all of the control and drive components required for off-line and DC to DC fixed frequency current-mode switching power supplies with minimal parts count. It offers the added features of internal full-cycle soft start and internal leading-edge blanking of the current-sense input. It contains digital current sense filtering, which disconnects the CS terminal from the current sense comparator during the 100ns interval immediately following the rising edge of the OUT pin. This digital filtering, also called leading-edge blanking, means that in most applications, no analog filtering (RC filter) is required on CS. Compared to an external RC filter technique, the leading-edge blanking provides a smaller effective CS to OUT propagation delay.
Internal soft start
Internal fault soft start
Internal leading-edge blanking of the current sense signal
70ns Typical response from current-sense to gate-drive output
1.5% Tolerance voltage reference
Green product and no Sb/Br

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UCC3803D Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	SOIC-8
Frequency	1 MHz
Supply Voltage (DC)	3.60V (min)
Number of Outputs	1 Output
Output Voltage	1 V
Output Current	1 A
Supply Current	500 µA
Number of Positions	8 Position
Number of Regulated Outputs	1 Output
Rise Time	41 ns
Switching Frequency	31 kHz
Topology	Buck, Boost, Flyback, Forward
Duty Cycle	100 %
Maximum Duty Cycle	99 %
Fall Time	44 ns
Operating Temperature (Max)	70 ℃
Operating Temperature (Min)	0 ℃
Supply Voltage	3.6V ~ 12V
Supply Voltage (Max)	12 V
Supply Voltage (Min)	3.6 V
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Size-Length	4.9 mm
Size-Width	3.91 mm
Size-Height	1.58 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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