Power management

L9907 undervoltage

Hello, we have a L9907 evaluation kit and we are trying implement the software to get L9907 to run. We have some problems we need support for:we supply the board at 24V and are using the VBAT_Scal circuitry to scale down the voltage on the VB pin, bu...

Measuring at the output of the L6235, we see during the offtime, that the outputs doesn't stay low. Could someone advise us what could go wrong in our application.?

Our BLDS motor becomes warm/hot at no load, at room temperature. In our application the surrounding temperature is more then ambient up until 55°C. Any addition heat that we generate inside the motor will cause the motor to quickly overheat, with pos...

Hello, I'm trying to verify signal level and functionality of interrupt pin INTn in PMIC, In data sheet mentioned the the pin is internally pulled up, is there any possible way to control pin polarities low/high and measure level at each polarity ?

how can I know the INTn is working normally?

I could not see in the datasheet if ST recommends to fill the gap underneath the part VNH5019A-E with thermal interface material. If that is recommended, is there a recommended material?

Why am I killing NFET on low side of motor drive?

I am using an STS10N3LH5 on the low side of a half bridge circuit. I have a schottky diode across the motor. For lighting applications we PWM the ground and everything is fine. However, during motor applications we PWM the high side and will somet...

Li-ion battery charger.

I want to design a Li-ion battery charger.Q1. How charge will know that it should work in constant current or constant voltage mode?Q2. How same charger can be configured for constant voltage and constant current operation?Regards,Vivek

BTA16-600BW not turning off

HiI have been testing the following circuit (which apparently works). I am finding that the TRIAC (BTA16-600BW) does not turn off with an inductive load (induction motor at 240V, 3A. 50Hz) yet with a simple house lamp the circuit works switching the ...

STSW-SPIN3202 Mini USB (ST-Link) not detected in my computer.

I recently faced an issue regarding my evaluation board STSW-SPIN3202. I was uploading the firmware to my board but unable to upload due to update issues. So, I have connected the ST-Link V2 to the board and connected it with the utility software pro...

Where do I find more detailed information on the STWBC Qi GUI used with the STEVAL-ISB044V1 Wireless Power Ref Design? How to interpret FOD metrics.

Hello, I recently started using the STEVAL-ISB044V1 Wireless Power Ref Design and it looks really useful. I am trying to figure out how to interpret some of the data in the FOD Metrics GUI. For example, if it click on the "Snapshot FOD internal metri...

What am I doing wrong with the l6470 stepper driver?

We develop electronics for controlling multiple stepper motors and use the L6470 as drivers. Radiators with fan cooling mounted on the chip of the driver (above). The current does not exceed 2 amperes. Radiators remain cold.The problem is that driver...