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reference designTPS7A7833PWPR | Demoboard TIDA-010060

Texas Instruments TPS7A7833PWPR | Demoboard TIDA-010060

Off-line (non-isolated) AC/DC power supply architectures reference design for grid applications

Overview

TopologyOther Topology
IC revisionE1

Description

This reference design showcases three non-isolated AC/DC power supply topologies for line-powered applications such as residential circuit interrupters, circuit breakers, home automation equipment and appliances for < 100 mA. The three topologies are:Off-line switcher using inductorAC line regulator using switched capacitorCapacitive-drop regulatorThe trade-off between efficiency, start-up time and solution size is done across architectures for various input and output conditions. The design methodology, test data and comparison is included for system designers to quickly evaluate and customize their solution.

Features

  • Off-line switcher using the UCC28880: High efficiency architecture using a buck converter simplifies the design covering universal input voltage – applications requiring fast startup (< 2 ms), small footprint or need to meet stringent surge requirements
  • Switching capacitor-drop regulator using the TPS7A78: Inductor-less architecture customized for a narrow input voltage range – high efficiency solution for low current (< 30 mA) and a single chip solution with integrated active rectifier and LDO
  • Capacitor-drop regulator using an LDO: Simplified solution with passive components and LDO – low-cost solution with low efficiency, high startup time and large footprint

Typical applications

  • Garage door systems
  • Electricity meters
  • Key panels
  • Smoke and heat detectors / Thermostats
  • Small home appliances

More information

Products

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Order Code
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Product series
C
Tol. C
VR(V (DC))
Size
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Ceramic Type
L(mm)
W(mm)
H(mm)
Fl(mm)
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885012105010
SPECWCAP-CSGP MLCCs 10 V(DC), 100 nF, ±20%
Simu­lation
Availability
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Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 10 V(DC)
Capacitance100 nF
Capacitance±20% 
Rated Voltage10 V (DC)
Size0402 
Operating Temperature -55 °C up to +85 °C
Dissipation Factor5 %
Insulation Resistance5 GΩ
Ceramic TypeX5R Class II 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
–Check availability
885012105013
SPECWCAP-CSGP MLCCs 10 V(DC), 2.2 µF, ±20%
Simu­lation
Availability
–
Downloads9 files

Status Activei| Production is active. Expected lifetime: >10 years.
Product seriesWCAP-CSGP MLCCs 10 V(DC)
Capacitance2.2 µF
Capacitance±20% 
Rated Voltage10 V (DC)
Size0402 
Operating Temperature -55 °C up to +85 °C
Dissipation Factor10 %
Insulation Resistance0.05 GΩ
Ceramic TypeX5R Class II 
Length1 mm
Width0.5 mm
Height0.5 mm
Pad Dimension0.25 mm
Packaging7" Tape & Reel 
–Check availability