IC manufacturers Texas Instruments

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Texas Instruments UCC28711 | Demoboard TIDA-00440

Leakage Current Measurement Reference Design for Determining Insulation Resistance

Overview

TopologyFlyback Converter
Input voltage150-800 V
Output 1500 V / 0 A
IC revisionE2

Description

This TI design provides a reference solution to measure Insulation Resistance up to 100MΩ. It has an on-board isolated 500Vdc power supply and an isolated signal conditioning circuit to measure the leakage current. This design is useful to find leakage due to insulation breakdown in transformer and motor windings.

Features

  • Leakage current measurement circuit with option for: Programmable Current Sense Amplifier and Switchable Shunt Resistors
  • Range of measurement: 0 to 100MΩ with accuracy of 5% (Un-calibrated)
  • Test voltage level derived from IEEE 43-2000 ("Recommended Practice for Testing
  • Insulation Resistance of Rotating Machinery")
  • On-board Isolated 500V Power Supply to measure the insulation resistance
  • Provision for Calibration Resistor on board
  • Hardware support for Start-of-Frame Detect allows implement IEEE1588 PTP

Typical applications

  • Solar Inverters
  • Transformers
  • Industrial Drives
  • Servo Drives
  • Variable Speed AC/DC Drives

More information

Products

Order Code Data­sheet Simu­lation Downloads Product seriesVINVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
MountSizePinsRowsH
(mm)
G
(mm)
GenderTypeIR
(A)
Packaging Samples
750342773SPEC
5 files Transformer 10 - 20 V (DC) 6 0.4 6 0.4 250 60 2.9 6000 15.7 22.1 THT EPW15 23.3 3.2 Tray
750342792SPEC
4 files MID-OLTI Offline Flyback Transformers for Texas Instruments 71 - 601 V (AC) 250 0.025 250 0.025 15 70 736 1:2.88:2.88:0.18 2500 17.96 20.3 THT EE16/8/5 14.3 3.5 Tray
61300211121SPEC
6 files WR-PHD 2.54 mm THT Pin Header 5.08 THT 2 Single Pin Header Straight 3 Bag
Order Code Data­sheet Simu­lation
750342773SPEC
750342792SPEC
61300211121SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Product seriesVINVOut1
(V)
IOut1
(A)
VOut2
(V)
IOut2
(A)
Vaux
(V)
fswitch
(kHz)
L
(µH)
NPRI : NSEC : NAUXISAT
(A)
VT
(V (AC))
L
(mm)
W
(mm)
MountSizePinsRowsH
(mm)
G
(mm)
GenderTypeIR
(A)
Packaging Samples