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TI UCC28703DBVRRoHS

Manufacturer
TI
MPN
UCC28703DBVR
LCSC Part #
C2866655
Packaging
SOT-23-6
Customer #
Key Attributes
Constant Voltage and Constant Current Controller with Primary Side Regulation
Datasheetpdf iconTI UCC28703DBVR
In-Stock: 165
165 In stock, ships now
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QtyUnit PriceTotal Amount
1+$ 1.1051$ 1.11
10+$ 0.9768$ 9.77
30+$ 0.8565$ 25.70
100+$ 0.7663$ 76.63
500+$ 0.7299$ 364.95
1,000+$ 0.7109$ 710.90
Standard Packaging3000/Full Reel
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Products Specifications

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TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/AC DC Converters, Offline Switchers
ManufacturerTI
PackagingSOT-23-6
Operating Temperature-20℃~+125℃
Output Current-
Frequency - Switching130kHz
Pd - Power Dissipation-
Voltage - Breakdown-
Voltage - Supply9V~35V
FeaturesQuasi-resonant/valley switching;EMI optimization (spread spectrum);Leading edge blanking;Under-voltage lockout;Cable compensation;Constant Current Mode (CC);Constant Voltage (CV);Over Voltage Protection;Over Current Protection
TopologyFlyback
Output Voltage-
Duty Cycle(Max)-
Working ModeDCM
Feedback SystemPrimary-side feedback
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Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

The UCC28700 family of flyback power supply controllers provides constant voltage (CV) and constant current (CC) output regulation without the need for an optocoupler. The device processes information from the primary power switch and an auxiliary flyback winding to achieve precise control of output voltage and current. Low startup current, dynamic control of operating states, and a customized modulation parameter support extremely low standby power consumption without sacrificing startup time or output static response.

The control algorithm in the UCC28700 family enables operating efficiency to meet or exceed applicable standards. The output drive connects 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) maintains high conversion efficiency across the full load and line range.

This controller has a maximum switching frequency of 130kHz and continuously maintains control of the primary peak current in the transformer. Protection features help maintain primary and secondary stress components under control. The UCC28700 allows the cable compensation level to be set. The UCC28701, UCC28702, and UCC28703 devices provide fixed cable compensation levels while using a negative temperature coefficient (NTC) resistor for remote temperature sensing.

Features

AI Translation
  • <30mW no-load power consumption for 5-star rating
  • Primary-Side Regulation (PSR) eliminates the need for optocouplers
  • ±5% voltage and current regulation
  • 130kHz maximum switching frequency for high power density charger design
  • Quasi-resonant valley switching for maximum overall efficiency
  • Frequency jitter mechanism for reduced EMI compatibility (patent pending)
  • Wide VDD range allows use of small bias capacitors
  • Clamped gate drive output for MOSFET
  • Protection features: overvoltage, brownout, and overcurrent protection
  • Programmable cable compensation (UCC28700 only)
  • NTC resistor interface with fixed cable compensation option (UCC28701, UCC28702, and UCC28703 only)
  • SOT23-6 package

Applications

AI Translation
  • USB-compatible adapters and chargers for consumer electronics (mobile phones, tablets, and cameras)
  • AC and DC power supplies