IC manufacturers Texas Instruments

IC manufacturers (103)

Texas Instruments UCC28740DR | Demoboard TIDA-010071

Constant-Voltage Constant-Current Flyback Controller Using Optocoupled Feedback

Overview

TopologyFlyback Converter
Input voltage120-375 V
Switching frequency100 kHz
Output 112 V / 0.3 A
Output 27 V / 2 A
Output 315 V / 0.3 A
IC revisionE2

Description

This reference design highlights an ultra-low standby isolated AC/DC auxiliary power stage followed by converters and linear regulators, a comparator-based control pilot interface to meet the SAE J1772 standard, an efficient relay and contactor drive and isolated line voltage sensing across the relay and contactor. Electric vehicle service equipment (EVSE) facilitates power delivery to electric vehicles safely from the grid. An EVSE control system consists of an auxiliary power stage, an off-board AC/DC high power stage (only in DC charging stations), energy metering unit, AC and DC residual current detector, an isolation monitor unit, relays and contactors with drive, two-way communication over single wire, service and user interfaces.

Features

  • Less than 10-mW No-Load Power Capability
  • Optocoupled Feedback for CV, and Primary-Side Regulation (PSR) for CC
  • Enables ±1% Voltage Regulation and ±5% Current Regulation Across Line and Load
  • 700-V Startup Switch - 100-kHz Maximum Switching Frequency Enables High-Power-Density Charger Designs
  • Resonant-Ring Valley-Switching Operation for Highest Overall Efficiency
  • Frequency Dithering to Ease EMI Compliance
  • Clamped Gate-Drive Output for MOSFET
  • Overvoltage, Low-Line, and Overcurrent Protection Functions - SOIC-7 Package

Typical applications

  • USB-Compliant Adapters and Chargers for Consumer Electronics / Standby Supply for TV and Desktop / White Goods

Products

Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
Pins
PCB/Cable/Panel
Modularity
Type
Wire Section
λDom typ.(nm)
Emitting Color
λPeak typ.(nm)
IV typ.(mcd)
VF typ.(V)
Chip Technology
50% typ.(°)
VIN
VOut1(V)
IOut1(A)
VOut2(V)
IOut2(A)
VOut3(V)
IOut3(A)
Vaux(V)
fswitch(kHz)
NPRI : NSEC : NAUX
ISAT(A)
Size
IR(A)
L(mH)
RDC max.(mΩ)
VR(V (AC))
VT(V (AC))
Material
L(mm)
W(mm)
H(mm)
Mount
Samples
WR-TBL Series 101 - 5.00 mm Horizontal Entry Modular, 2, Wire Protector
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Pins
PCB/Cable/PanelPCB 
ModularityYes 
TypeHorizontal 
Wire Section 26 to 14 (AWG) 0.5 to 2.5 (mm²)
Rated Current16 A
Length10 mm
Height12.6 mm
MountTHT 
WR-TBL Series 101 - 5.00 mm Horizontal Entry Modular, 3, Wire Protector
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Pins
PCB/Cable/PanelPCB 
ModularityYes 
TypeHorizontal 
Wire Section 26 to 14 (AWG) 0.5 to 2.5 (mm²)
Rated Current16 A
Length15 mm
Height12.6 mm
MountTHT 
WE-CMB Common Mode Power Line Choke, 4, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Pins
SizeXS 
Rated Current0.7 A
Inductance10 mH
DC Resistance350 mΩ
Rated Voltage250 V (AC)
Insulation Test Voltage1500 V (AC)
MaterialMnZn 
Length15 mm
Width7.5 mm
Height18 mm
MountTHT 
WL-SMCW SMT Mono-color Chip LED Waterclear, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Dominant Wavelength [typ.]525 nm
Emitting ColorGreen 
Peak Wavelength [typ.]515 nm
Luminous Intensity [typ.]430 mcd
Forward Voltage [typ.]3.2 V
Chip TechnologyInGaN 
Viewing Angle Phi 0° [typ.]140 °
Size0603 
Length1.6 mm
Width0.8 mm
Height0.7 mm
MountSMT 
WE-OLTI Offline Flyback Transformers, –, –
Simu­lation
Status Activei| Production is active. Expected lifetime: >10 years.
Input Voltage 85 - 265 V (AC)
Output Voltage 112 V
Output Current 10.3 A
Output Voltage 27 V
Output Current 22 A
Output Voltage 3-15 V
Output Current 30.3 A
Auxiliary Voltage15 V
Switching Frequency 66
Turns Ratio29.33:1:1.67:3:3 
Saturation Current1.4 A
SizeEFD20 
Inductance0.68 mH
Insulation Test Voltage3750 V (AC)
Length21.5 mm
Width29 mm
Height12.45 mm
MountTHT