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

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Description

The UCC28700DBVT is a flyback Power Supply Controller provides constant-voltage (CV) and constant-current (CC) output regulation without the use of an optical coupler. It process information from the primary power switch and an auxiliary flyback winding for precise control of output voltage and current. Low start-up current, dynamically controlled operating states and a tailored modulation profile support very low standby power without sacrificing start-up time or output transient response. Control algorithms in the UCC28700 family allow operating efficiencies to meet or exceed applicable standards. The output drive interfaces to a MOSFET power switch. Discontinuous conduction mode (DCM) with valley switching reduces switching losses. Modulation of switching frequency and primary current peak amplitude (FM and AM) keeps the conversion efficiency high across the entire load and line ranges.
<30mW No-load power for 5-star rating
Primary-side regulation (PSR) eliminates opto-coupler
±5% Voltage and current regulation
Density charger designs
Quasi-resonant valley-switching operation for highest overall efficiency
Patent-pending frequency-jitter scheme to ease EMI Compliance
Clamped gate-drive output for MOSFET
Overvoltage, low-line and overcurrent protection
Green product and no Sb/Br
Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.

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UCC28700DBVT Specifications

Attribute	Attribute Value

Datasheet	Datasheet
3D Model	3D Model
Mounting Style	Surface Mount
Number of Pins	6 Pin
Case/Package	SOT-23-6
Frequency	130 kHz
Supply Voltage (DC)	9.00V (min)
Number of Outputs	1 Output
Input Voltage (DC)	35.0 V
Output Voltage	14 V
Output Current	25 mA
Supply Current	2.65 mA
Number of Positions	6 Position
Power Dissipation	20 W
Number of Regulated Outputs	1 Output
Switching Frequency	140 kHz
Duty Cycle	99 %
Maximum Duty Cycle	99 %
Operating Temperature (Max)	125 ℃
Operating Temperature (Min)	-20 ℃
Supply Voltage	9V ~ 35V
Supply Voltage (Max)	36 V
Supply Voltage (Min)	9 V
Input Voltage	35 V
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Size-Length	3.05 mm
Size-Width	1.75 mm
Size-Height	1.3 mm
Operating Temperature	-20℃ ~ 125℃
Product Lifecycle Status	Active
Packaging	Tape & Reel (TR)
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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- Vacuum packaging
- Anti-static packaging
- Shockproof foam
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