600V Uni-directional Current/Voltage/Power Monitoring for Solar Smart Combiner Box Reference Design


Design files


The TIDA-00639 reference design is a non-isolated high-side current and voltage sensing design for a smart combiner box in a grounded or ungrounded system.  The non-isolated current sensing topology enables accurate power monitoring for high voltage systems.  This design is optimized for any voltage between 95 V and 600 V, and with minor component changes this sensing topology can be optimized for any voltage from 40 to 1000V.

  • Non-isolated high-side current and voltage monitoring of 1-4 photovoltaic (PV) strings
  • Capable of monitoring voltage within ±1 % full scale accuracy
  • Capable of uncalibrated current monitoring within ±1.25 % full scale accuracy and capable of calibrated current monitoring within ±0.75 % full scale accuracy
  • Integrates with RS-485 communication board
  • Option to connect four TIDA-00639 boards to one microcontroller
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUBU9.PDF (1300 K)

Reference design overview and verified performance test data

TIDRO21.PDF (1292 K)

Detailed schematic diagram for design layout and components

TIDRO22.PDF (62 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDRO23.PDF (2153 K)

Detailed overview of design layout for component placement

TIDRO25.ZIP (1073 K)

Files used for 3D models or 2D drawings of IC components

TIDCCR3.ZIP (1229 K)

Design file that contains information on physical board layer of design PCB

TIDRO24.PDF (3377 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Digital power monitors

INA22636V, 16-bit, ultra-precise i2c output current/voltage/power monitor w/alert

Data sheet: PDF | HTML
Analog temperature sensors

LMT841.5V-Capable, 10 uA Analog Output Temperature Sensor in SC70 and TO-92

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 600-V Unidirectional Curr/Volt/Power Monitoring for Solar Smart Combiner Box Oct. 11, 2016

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