IC manufacturers Texas Instruments

IC manufacturers (103)

Texas Instruments SN6505BDBVR | Demoboard TIDA-010065

High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design

Overview

TopologyPush-Pull Converter symmetrical isolated
Input voltage5 V
Switching frequency100-1600 kHz
Output 16 V
IC revisionE2

Description

This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for low dropout regulator (LDO)) generates the isolated power. Shunts that are interfaced to ±50-mV input range isolation amplifiers configured as channel isolated inputs measure the current. Potential divider output interfaced to ±250-mV or ±12-V input range isolation amplifiers configured as group isolated inputs measure the voltage. The outputs of the isolation amplifiers interface directly to 24-bit delta sigma analog-to-digital converter (ADC) or are scaled to ±10 V using gain amplifiers and interfaced to 16-bit SAR ADC for performance evaluation. On-board digital diagnostics improves reliability and enhances system performance.

Features

  • Generation of high efficiency isolated supply of 5 or 5.4V (LDO head room) from 4.5 to 5.5 V input providing reinforced isolation
  • Measures three group isolated voltage inputs with a range of 3-350V providing pin compatible basic or reinforced isolation and three isolated current inputs from 40mA-12.5A providing reinforced isolation
  • ISO224 with input range of ±12V input range connects directly to low power current transformer output as per IEC 60044-8
  • Measurement of DC voltage and current with 1us fast fault detection comparator path
  • Gain scaling of isolation amplifier output to ADS8588H input range of ±10V using instrumentation, precision or general purpose amplifiers
  • Achieves ±0.2% accuracy for both voltage and current using 16-bit SAR or 24-bit delta-sigma ADC

Typical applications

  • Process control / Precision instruments / Low-noise filament supplies
  • Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN / Low-noise isolated USB supplies / Distributed supplies
  • Telecom supplies / Radio supplies
  • Medical instruments

Products

Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
VINVOut1
(V (DC))
IOut1
(A)
Type of Insulationfswitch
(kHz)
∫Udt
(Vµs)
NPRI : NSECL
(µH)
VT
(V (RMS))
MountPins
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples
885012206095SPEC
9 files Active i| Production is active. Expected lifetime: >10 years.WCAP-CSGP MLCCs 50 V(DC)100 nF ±10% 50 0603 -55 °C up to +125 °C 35 GΩ X7R Class II 1.6 0.8 0.4 0.8 7" Tape & Reel
61300411021SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

7 files Active i| Production is active. Expected lifetime: >10 years.WR-PHD 2.54 mm THT Angled Pin Header -40 °C up to +105 °C1000 MΩ 10.16 THT 4 Single Pin Header Angled 3 Bag
750313638SPEC
7 files Active i| Production is active. Expected lifetime: >10 years.WE-PPTI Push-Pull Transformers 1209 -40 °C up to +125 °C 9.14 12.7 5 V (DC) 5 0.65 Reinforced 300 - 620 10 1:1.3 340 5000 SMT 7.62 Tape and Reel
Order Code Data­sheet Simu­lation
885012206095SPEC
61300411021SPEC

PCN pending

Due to a pending PCN there will be a new datasheet revision issued for this order code soon. Please find the actual as well based on valid PCN date the new revision datasheet below. If you have further questions please get in contact with our sales staff.

750313638SPEC
Samples
Order Code Data­sheet Simu­lation Downloads Status Product seriesCTol. CVR
(V (DC))
SizeOperating TemperatureDF
(%)
RISOCeramic TypeL
(mm)
W
(mm)
Fl
(mm)
VINVOut1
(V (DC))
IOut1
(A)
Type of Insulationfswitch
(kHz)
∫Udt
(Vµs)
NPRI : NSECL
(µH)
VT
(V (RMS))
MountPins
(pcs)
RowsH
(mm)
GenderTypeIR
(A)
Packaging Samples