Power management
Discuss power management solutions. Ask questions and find answers on voltage configurations, short circuit protection, and programming.
Forum Posts
L9942 not working properly accoding to the sample
Hello I'm a newer about stepping motor IC L9942 I compsed of L9942 Climate control Unit in HVAC .Some devices have no problem when they are controlled by a program.A specific device rotates discontinuously when it rotates.I am looking for the caus...
Where does VB come from in STEVAL-POE005V1 in RAUX-only mode?
Hello,I have a question concerning PM8805 and the related evaluation board STEVAL-POE005V1.From my understanding in the evaluation board the PGD signal is pulled-up by a resistor to VB.Now, when I power the board only by RAUX, where does the voltage ...
Resolved! hall sensor reading problem
Hi I use a stm32f446 to run 2 BLDC motors (same motor, same configuration). One of the motors runs perfectly but the other one don't succeed to reach the speed reference. When I enter 1000 rpm it runs until around 200-300 rpm only and it makes a lot ...
VN5E016AH has unexpected voltage drop at zero load current
With zero load current, I'd expect the voltage drop between VCC and OUT to be essentially zero, since the on resistance is supposed to be 0.016 ohms (T = 25 C). Instead, there is a drop of 33 mV. VCC is 5 V. The datasheet lists a parameter of Von,...
Resolved! Capacity at CVDD pin of L6362A
The other info I struggle is on page 12 in the datasheet:CVDD higher than recommend values is allowed but external protection nets on VDD could be necessary for high VCC slew rate (>15 V/μs). In fact, we would like to use a bigger blocking capacitor ...
STSPIN220 with X-CUBE-SPN6
Hi all,I have a question about stspin220.h.There are two define as follow:/// Maximum frequency of the step clock frequency in Hz#define STSPIN220_MAX_STCK_FREQ (10000)/// Minimum frequency of the step clock frequency in Hz#define STSPIN220_MIN_S...
Software support for STEVAL-IHM036V1
I am looking for any software folders related to the above eval kit. I cannot see any online and have requested such from regional support 10 days ago but still no files. If we do not get support soon we will have to move to another manufacturer due ...
Unable to calculate the Output Current of the STEVAL-ISA178V1
Hi Sir/Madam,Greetings of the day,In my project I am implementing the AC-DC conversion circuitry to power the MCU and other external circuitry. So that I have taken STEVAL-ISA178V1 as reference. In that, it was mentioned that output current of the c...
Resolved! How to program OTP registers of L9916
We are to evaluating the L9916 (Multifunction alternator voltage regulator...). From the datasheet I learned that there are OTP registers which are programmed by I2C – as described in section “OTP Programming�? on page 30. Okay, but in addition we ne...
