Power management

What can increase LM7915 ADJ-Pin current increase during start up?

During start up of a very simple LM7915 LDO within a split supply system for +/-15V sometimes ADJ-Pin Current increases during start up phase above the usal level.When this occurs, LM7915 can hang at 0V output voltage.As soon as adj pin current retur...

Hi, I'm wondering how to use self-commissioning SCC_GetRs(CSCC this) function from FOC Motor Control Library, I've used it but the returned value is always 0.

Step-by-step tutorial with example of calculations of the PFC integrated in the STCMB1

Greetings All,I would like a good example of calculations of the PFC intergarted into the STCMB1.So far, knowledge has been acquired about the LLC resonant. But not the PFC.Which chip is the closest ?Thank you.Best regardsSerge

Noise (click) problems while driving BLDC motor by using SPIN3202

Hi all, after many hours of tuning and trials I finally got my new BLDC motor running. It's a 36V, 180W rated power, Nominal current 6.8A.I am using FOC with 3 Hall sensors and single shunt. Problem I am facing is, quite often motor makes strange noi...

L6470 / L6472 VREG line question

Hello, I am designing the system with both L6470PD and L6472PD stepper drivers. Since my system is operating on 3.3V (MCU is STM32F103 ) I have tight the VReg with VDD line as suggested. The problem which I am facing is following. I supply the drive...

L6563 gate pulses happen only at the crest of Vac, for Vac>220Vrms and load <25%

Nice 3mSec string of gate pulses as Vac rounds the top of the AC wave, then the gate pulses stop for 5.3mSec until the next 60Hz crest comes along. Voltage waveforms on all the other pins look normal as expected. Schematic and complete set of scope s...

The A6986 datasheet does not specify the minimum difference between output and input (it says it can operate at 100% duty cycle). But what is the real minimum voltage difference at switching?

L6480H stall detection does not work. What should I do?

Hi everyone!I want to use the ST EVAL6480H board to control a stepper motor but I get stuck with the stall detection feature of the chip. My problem is that it always generates stall (step loss). I have tried it with different configurations and wit...

Multiple L6470PD via daisy chain.

Hello FolksThe L6470 datasheet (see snapshots provided by Jacek) clearly says that Vreg should be connected to VDD, as they are not connected internally. Further, VDD should have 10uF Cap to work properly.Surprisingly, the X-NUCLEO-IHM02A1, which has...

i am using L6566BH for high voltage SMPS. Its not turning ON with load. if its not connected with load then its working. Can you please check and revert with the solution.

Input is 300 to 800V DC and output is 24V DC. Attached the schematics of the same.