We take your privacy very seriously, please agree to all cookies used when you visit our website. More information about the processing of personal data could be found inPrivacy Policy

Product
weixintupian_20240221095756.jpg

More News

Isolated Power Supply Simplified with One Chip for both High Performance and Cost Effectiveness

2023/02/20


In view of high voltage, safety, noise immunity and other factors in industrial system design, the demand for isolated design is more and more extensive, and transferring signal/power across isolation barrier has been one of the common challenges for designers. As the leader of isolation technology, NOVOSENSE has been committed to exploring isolated power solutions with higher integration, reliability and cost effectiveness. This article introduces the integrated isolated power 3CH digital isolated solution of NOVOSENSE, which helps developers simplify industrial system design.

Isolated power supply solution based on on-chip transformer

According to different requirements, the isolated power supply in the system can be divided into three parts: isolated drive power supply, isolated sampling power supply and isolated communication power supply. Whereas, the power supply solution of external transformer /multi-winding output is adopted for the isolated drive/sampling power supply due to relatively large power and concentrated layout. For isolated communication power supply, because its layout is relatively far away from the main power loop of the system and its power consumption is relatively low, the independent isolated power module is often preferred.With industry-leading on-chip transformer technology, the NIRSP31 integrates isolated power and three-channel digital isolators on a single chip with advanced LGA package (4mm×5mm). Compared with the traditional isolated power module + optical coupler/digital isolator solution, it greatly reduces the PCB layout area and height, and can further reduce overall system cost.


 Isolated power module+3CH opto-coupler

+CAN/RS485 transceiver  

  NIRSP31+CAN/RS485 transceiver 

Solution Layout

image.png

image.pngimage.png

 Average Layout Area 

1600mm2

480mm2

 Input Voltage Range 

4.5~5.5V

4.5~5.5V (NIRSP31)

 3.0~3.6/4.5~5.5V (NIRSP31V) 

 Output Voltage Range 

5V

5V/3.3V Optional

Load Regulation (Typ)

12%

0.4%

Working Temperature

-40~105℃

-40~125℃

Output Power @25℃

1W

400mW

Output Power @105℃

0W

400mW

Enabling Function

N

Y

  Primary Secondary Parasitic Capacitance (Typ)   

20pF

2.6pF

 CMTI(min) 

NA

50(kV/us)

 Insulation Voltage

1500Vdc

3000Vrms

 Data Rate

 Depend on the selected optical coupler / isolator 

20Mbps

 Protection Function

Short-circuit protection

 Short-circuit protection / over-temperature protection / under-voltage protection 

*The parameters of the isolated power module in the preceding table are specific to a single part number, and the specifications vary with materials.


The above table compares the parameters of the NIRSP31 with those of the traditional isolated power module solution. In summary, the NIRSP31 has the following advantages:

- Solution area reduction >200%

- Solution cost reduction >15%

- Flexible configuration, 5V/3.3V selectable output options

- Excellent load regulation(integrated closed loop control)

- Wide operating temperature range (-40 °C to 125 °C), and low output power temperature derating

- Enable (EN) pin for applications with low static power requirements

- Small primary-secondary parasitic capacitance and high CMTI(common mode transient immunity)

- Up to 3000Vrms 1-minute insulation voltage

- Integrated short-circuit protection/over-temperature protection/under-voltage protection

- Automatic packaging, high reliability and low failure rate

- High data rate and lifetime compared with the opto-coupler


Isolated power supply 3CH digital isolator NIRSP31 with high integration, high reliability and high cost effectiveness

Key parameters:

- 3kVrms insulation voltage

- I/O voltage range supports 1.8~5.5V MCU

- Supply voltage:

    - VDD: 4.5~5.5V for NIRSP31

                3~3.6V/4.5~5.5V for NIRSP31V

    - VDDL: 1.8~3.6V/4.5~5.5V

- Output:

    - 80mA @5V->5V/3.3V

    - 60mA @3.3V->3.3V

- Under-voltage protection, short-circuit protection and over-temperature protection

- Data rate: 20Mbps

- Transmission delay: <75ns

- CMTI: ±50kV/us

- Operating temperature: -40~125℃

- Package: LGA-18 (4.00mm × 5.00mm)

Applications:

- E-Bike

- Battery energy storage system

- Industrial meter

- Circuit breaker


Industrial BMS: NOVOSENSE total solution

In industrial BMS applications, NIRSP31 can be used in isolated RS485 and CAN communication between battery pack MCU and an external ECUs without external isolated power supply and extra LDO (good load regulation) to ensure both compact design and system reliability.

image.png

Typical block diagram of industrial BMS


NOVOSENSE also provides total solution for industrial BMS, including bidirectional I2C isolator NSI8100, RS485 transceiver NCA3485/NCA3491, CAN transceiver NCA1042/NCA1051, and dual-channel low-side driver NSD1025.


NIRSP31 Demo boards


隔离RS485.jpg

Isolated RS485 communication Demo board 

隔离CAN.jpg 

Isolated CAN communication Demo board

For easy evaluation, NOVOSENSE provides isolated RS485 communication demo board NIRSP31+NCA3485, and isolated CAN communication demo board NIRSP31+NCA1042. For sample application or ordering, please e-mail to sales@novosns.com or call 0086-512-62601802. For more information, please click www.novosns.com

CONTACT US

Thank you for your inquiry.

Please provide the following information and we will contact you as soon as possible, thank you.

Industrial
Automotive
Personal Electronics
Enterprise & Communication
Signal Chain
Sensor
Isolator
Interface
Driver
Power
Power Management
Others
I have read and agree to Novosense Private Policy