Power management

What could cause the STC3115 to ACK data but not save it to memory?

I'm using the STC3115 driver provided by ST and am having a strange issue with the STC3115 on a custom board. I've hooked up an o-cope and am monitoring the data being sent over I2C. When I write any of the registers in the STC3115 it ACKs the data b...

Why STNS01 does not switch to the battery when the chip is only connected to a battery?

Hello,I am using a STNS01 in my circuit for the power management. The problem is when I only have a charged battery (4.1 v) connected to the BAT pin, it does not switch to the battery voltage. As if the chip is in shutdown mode (I do not know why, th...

L6227Q_VREF and OCD implement

I have PWM to control motor at each channel. One is limited by 0.3A and the other one is limited by 0.1A by voltage divider reference to 5V. By using this approach, as my understand I can not reach to OCD feature because the current can not reach to...

STIB1060DM2T-L Does the IC have isolation for the microcontroller signals or should we add external optocouplers to protect it.

I am currently planning on build a low voltage 3 phase AC power supply for powering my DIY axial motor. I am scared if I input high voltage say 60V, it may have a chance of leak of current going to the micro-controller. I cant find any protection men...

Phase current control for L6470h

Hi dear,I designed a step motor driver board with L6470h and tested it. There are some problems with the board.I set the run current, hold current, ACC, ACC current, DEC, DEC current at the fixed value, and then changed the MAX speed, then the actual...

I want to know how much time delay there will be between the comparative output matching and the pin output. Is the delay fixed?

Using STM32F407 comparative output function, we generate 57600Hz square wave. I find that there are some fluctuations in square wave. Observed by oscilloscope, the rising and falling edges of square wave have several ns fluctuations. So I want to kno...

L6470PD - Isolate Power Line

I am designing stepper driever using L6470PD.Is it possible to isolate system power and motor driver power?I wonder L6470PD internal connection. Is there related document?I want to design power line like the picture below

How to calculate the right Capacitor for Qi charging coil?

Dear Forum,currently I'm implementing a design with the STWLC33 and in the datasheet is a reference design for a coil with L = 8 uH and a C = 3.9 nF. I calculated the resulting resonance frequency and got about f = 90 kHz (with Cser and Cpar). Shoul...

Overcurrent protection function of L6470h

Hi,I designed a board with ​L6470h and tested it. I am confused with the Overcurrent protection function. It is shown that the capability of L6470h is 7.0 A peak current (3.0 A r.m.s.), but the MAX overcurrent threshold can be set to 6A in register...

How to use STEVAL-ISB044V1 in EPP mode (15 watt ) with input voltage 5V only and no D+ or D- provided