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Power management integrated circuits (power management ICs or PMICs or PMU as unit) are integrated circuits for power management. A power management integrated circuit (PMIC) is used to manage power on an electronic devices or in modules on devices that may have a range of voltages. Power management ICs are solid state devices that control the flow and direction of electrical power. A PMIC may include battery management, voltage regulation, and charging functions. Although PMIC refers to a wide range of chips (or modules in system-on-a-chip devices), most include several DC/DC converters or their control part. PMICs are frequently used to power small, battery-operated devices since the integration of multiple functions into a single chip results in more efficient use of space and system power. Functions commonly integrated into a PMIC include voltage converters and regulators, Battery Mangement ICs, battery fuel gauges, LDOs, Mosfets, IGBT, LED drivers, real-time clocks, power sequencers, and power control.
Hello Volt Tech Team, Can anyone let me know how to enable and implement Automatic password sequencing which follows a pseudo-random sequence based on a 14-bit Fibonacci LFSR? Thank You
Hello Volt Tech Team,
Can anyone let me know how to enable and implement Automatic password sequencing which follows a pseudo-random sequence based on a 14-bit Fibonacci LFSR?
Thank You
Read lessDear All, We’ve made a class d system, based on IRS2092 CHIPSET. It’s an amp of 2000W system and we use MOSFET of Onsemi FDP51N25. We’re looking to change this to Infineon MOSFET with part number IRFB4332. Please suggest can it’s one to one ...Read more
Dear All,
We’ve made a class d system, based on IRS2092 CHIPSET.
It’s an amp of 2000W system and we use MOSFET of Onsemi FDP51N25.
We’re looking to change this to Infineon MOSFET with part number IRFB4332.
Please suggest can it’s one to one replacement from FDP51N25 TO IRF4332.
Thanks & Regards
Read less
Hello, The IRFB4332 is a suitable replacement for the FDP51N25 MOSFET in your Class D amplifier system. Both MOSFETs are N- channel devices and have such voltage conditions, with a minimum VDS of 250V. The IRFB4332 has a just lower RDS (ON) value than the FDP51N25, which means it'll dissipate less pRead more
Hello,
The IRFB4332 is a suitable replacement for the FDP51N25 MOSFET in your Class D amplifier system. Both MOSFETs are N- channel devices and have such voltage conditions, with a minimum VDS of 250V.
The IRFB4332 has a just lower RDS (ON) value than the FDP51N25, which means it’ll dissipate less power when conducting. This can potentially result in better effectiveness for your system.
However, it’s important to note that the IRFB4332 has an advanced pulsed drain current (Id) level of 60A compared to the 51A level of the FDP51N25. This means that if your system operates at very high current levels, you may need to ensure that the IRFB4332 can manage the current without breaking its maximum levels.
Overall, make sure to double-check the specifications and ensure that the MOSFET can manage the demands of your specific application.
Thank You
See lessHello, I just entered my brand new stm32h747 discovery board, on power-up it does nothing just two LEDs light up, according to the user primer it should be preloaded with a demo. I checked in Cube Prog and it reports as blank. Is ...Read more
Hello,
I just entered my brand new stm32h747 discovery board, on power-up it does nothing just two LEDs light up, according to the user primer it should be preloaded with a demo.
I checked in Cube Prog and it reports as blank.
Is it possible that my device got damaged ever or it’s just not flashed? aren’t units tested before dispatching out?
Is this a common thing? I do not flash back ever entering a discovery board blank.
Thank You
Read lessHello, In actuality, the DISCOVERY is always delivered pre-programmed. Depending on where you got the board, a possible former owner may have canceled its flash. still, it shouldn't be a problem to reprogram the board and the external flash memory, as the collected demo can be set up on the STM32H74Read more
Hello, In actuality, the DISCOVERY is always delivered pre-programmed. Depending on where you got the board, a possible former owner may have canceled its flash.
still, it shouldn’t be a problem to reprogram the board and the external flash memory, as the collected demo can be set up on the STM32H747I–DISCO product website under Documentation> collected Demos, after unbarring in the subfolder STM32H747I-DISCO_demo/Binary.
Does it answer your question?
Regards
Vikas Nagpal
See lessHii Team, Do Digital POL devices like TDA3860/ 740 devices work without a bleeder resistor on the output without affecting the operating system? Thank you for your help. Regards, Vikas
Hii Team,
Do Digital POL devices like TDA3860/ 740 devices work without a bleeder resistor on the output without affecting the operating system?
Thank you for your help.
Regards,
Vikas
Read less
Hello@vikas, It's always recommended to use a bleeder of 100 ohms. Vout of the part has an offset of around 250mV due to a leakage in no-load condition. The 100-ohm bleeder will pull it down. If there's no issue with 250mV offset the part can be used without bleeder also. If there's a concern with eRead more
Hellovikas Nagpal,
It’s always recommended to use a bleeder of 100 ohms.
Vout of the part has an offset of around 250mV due to a leakage in no-load condition.
The 100-ohm bleeder will pull it down.
If there’s no issue with 250mV offset the part can be used without bleeder also.
If there’s a concern with effectiveness while using a 100-ohm bleeder also a 500-ohm bleeder can be used. 500-ohm bleeder will have an offset of 65mV.
Regards,
Ashish Gawade
See lessHello, I’m working on a custom board design and we’re looking into using the STM32H7B3IIT6 or the STM32H7B3IIT6Q. The main difference I have seen between the two is the Q- version removes some of the IOs to add an SMPS. I’m trying ...Read more
Hello,
I’m working on a custom board design and we’re looking into using the STM32H7B3IIT6 or the STM32H7B3IIT6Q. The main difference I have seen between the two is the Q- version removes some of the IOs to add an SMPS.
I’m trying to determine if that’s necessary for my design and the documentation I am finding does not really explain its necessity. It simply mentions how to use it.
My application isn’t-ultra-low power by any means. We have a large battery bank that powers the MCU and the MCU’s power consumption is VERY negligible for our application, so MCU efficiency isn’t required.
Based on that, would that mean that we don’t want SMPS? Or are there other benefits or things to consider?
Thank You
Read lessHello, The SMPS reduces the power loss when VDD is regulated down to the core voltage with an internal LDO. The SMPS, thus, increases energy effectiveness. However, you're better off with the LDO version because you have further GPIOs and one lower coil and capacitor on the BOM, If you do not need tRead more
Hello,
The SMPS reduces the power loss when VDD is regulated down to the core voltage with an internal LDO. The SMPS, thus, increases energy effectiveness.
However, you’re better off with the LDO version because you have further GPIOs and one lower coil and capacitor on the BOM, If you do not need to save every milliwatt.
Does it answer your question?
Regards
See lessHello Community Please help me with the formula for calculating the Number of Turns in the Primary and Secondary windings of the Low-Frequency DC to AC Inverter Transformer project. I want to design a 3KVA low-Frequency transformer. The input DC voltage is ...Read more
Hello Community
Please help me with the formula for calculating the Number of Turns in the Primary and Secondary windings of the Low-Frequency DC to AC Inverter Transformer project.
I want to design a 3KVA low-Frequency transformer. The input DC voltage is 24VDC, the Output AC voltage is 230 and the AC voltage power is 3KVA.
Please let me hear from you
Thanks
Vikas Nagpal
Read less
Hi, Thank you for posting on the Volt.Tech community. Can you please share a detailed block diagram of the Inverter system? Is it the same as the below-attached block? This operation note from Infineon depicts a sample figure for a low-frequency converter. Regards, Julian
Hi,
Thank you for posting on the Volt.Tech community.
Can you please share a detailed block diagram of the Inverter system?
Is it the same as the below-attached block?
This operation note from Infineon depicts a sample figure for a low-frequency converter.
Regards,
Julian
See less
Hi, I’ve LD2981ABM50TR. It’s marked” F150″( picture). How can I make sure it’s LD2981ABM50TR?Please help. Thank You
Hi, I’ve LD2981ABM50TR. It’s marked” F150″( picture). How can I make sure it’s LD2981ABM50TR?
Please help.
Thank You
Read less
Hello, The labeling looks ok F130 = LD2981ABM30TR F133 = LD2981ABM33TR F150 = LD2981ABM50TR So there's a good chance that the LD2981ABM50TR is similar to these devices in SOT23- 5L package. However, please label this thread as answered by selecting Select as best, as also explained here, If the probRead more
Hello,
The labeling looks ok
F130 = LD2981ABM30TR
F133 = LD2981ABM33TR
F150 = LD2981ABM50TR
So there’s a good chance that the LD2981ABM50TR is similar to these devices in SOT23- 5L package.
However, please label this thread as answered by selecting Select as best, as also explained here, If the problem is answered. This will help other users find that answer faster.
Regards
See lessHii, In TLE9471ES when VCAN_UV is touched off the TLE9471ES will disable the CAN transmitter. That means the CAN event is still in working condition. So, my question is when the VCAN_UV fault is still present can the CAN signals be dependable ...Read more
Hii,
In TLE9471ES when VCAN_UV is touched off the TLE9471ES will disable the CAN transmitter.
That means the CAN event is still in working condition.
So, my question is when the VCAN_UV fault is still present can the CAN signals be dependable to read use for further action?
Thank You
Read lessHii, Thanks for your query. The voltage at the CAN supply pin is covered in CAN Normal and Receive Only Mode. In the case of VCAN Undervoltage signalization via SPI bit VCAN_UV is touched off and the TLE9471ES disables the transmitter stage. If the CAN supply reaches a higher position than the underRead more
Hii,
Thanks for your query.
The voltage at the CAN supply pin is covered in CAN Normal and Receive Only Mode. In the case of VCAN
Undervoltage signalization via SPI bit VCAN_UV is touched off and the TLE9471ES disables the transmitter stage.
If the CAN supply reaches a higher position than the under-voltage finding threshold (VCAN>VCAN_UV,r), the transceiver is automatically switched back to CAN Normal Mode.
The under-voltage finding is enabled if the mode bit CAN_1 = ‘ 1 ’, i.e., in CAN Normal or CAN Receive Only
Mode. As the Receiver is also powered by the VCAN, in case of insufficient supply, it may not transmit the signals correctly and admit them correctly. PFA for further information.
Regards,
See lessHello, I’m designing a circuit with an L5973D switching controller to give 3.8 v and am facing a peculiar problem. The circuit is as per the design reference in the datasheet and the feedback resistors are given to give 3.8 v ...Read more
Hello,
I’m designing a circuit with an L5973D switching controller to give 3.8 v and am facing a peculiar problem. The circuit is as per the design reference in the datasheet and the feedback resistors are given to give 3.8 v affair (10K and 4.7 K). originally, I get 3.8 v. But while leaving the circuit connected, it starts inching up about 10mV every 10 twinkles or so. likewise, powering down the circuit and also back over doesn’t beget it to give 3.8 v again. Wondering what is going on.
Read lessHi, out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs. 1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations. 2. Insure the track from the switching poRead more
Hi,
out of my one experience in switch mode power supplies there are a couple of key points to follow when doing these designs.
1. Insure all resistors are 1 type, this limits the change over temperature which in turn will limit the output change variations.
2. Insure the track from the switching point is close as possible to the coil and doesn’t add resistance to the coil.
3. Output capacitors require to hold a low ESR type
hope some of this helps.
Thanks & Regards
Nidhi Singh
See lessHello. I’ve been using the diodes as an RF sensor for 2.4 GHz signals. After many tests, the diodes keep breaking down and I had to change the diodes. Reverse Voltage (Vr) is below the maximum ratings for both of them. ...Read more
Hello.
I’ve been using the diodes as an RF sensor for 2.4 GHz signals. After many tests, the diodes keep breaking down and I had to change the diodes. Reverse Voltage (Vr) is below the maximum ratings for both of them. The circuit used for this is in the document” RF and microwave power discovery with
Schottky diodes” as attached.
Can you please help me understand why this is passing and any suggestions on how I can stop this from passing?
Thank you
Read lessHello， Have you checked that the bypass capacitor is chosen to be 1nF？ So that it has low ohmic capacitive reactance up to 6 GHz. RL between 10kohm and 1Mohm Best regards, Vikas
Hello，
Have you checked that the bypass capacitor is chosen to be 1nF？
So that it has low ohmic capacitive reactance up to 6 GHz.
RL between 10kohm and 1Mohm
Best regards,
Vikas
See less
Hi, For enabling the automatic password sequencing you can write 1 to bit PAR of WDTCPUyCON1 (or WDTSCON1 for safety watchdog) Register. For example, if you want to enable automatic password sequencing for CPU0 you can do it like this (IfxScuWdt_getCpuWatchdogPassword()); = 1; (IfxScuWdt_getCpuWatchRead more
Hi,
For enabling the automatic password sequencing you can write 1 to bit PAR of WDTCPUyCON1 (or WDTSCON1 for safety watchdog) Register. For example, if you want to enable automatic password sequencing for CPU0 you can do it like this
After enabling this point the password changes automatically after each password check and follows a pseudorandom sequence based upon a 14-bit Fibonacci LFSR with characteristic polynomial x14 x13 x12 x2 1 as you said. So each time you have to calculate the new password grounded on this sequence.
Best Regards,
Ashish
See less