Power management

L7987L problems

Hello!I use L7987L DC-DC as step-down regulator with input voltage range 9-60V. output 5V , 2A max.Online design offers schematic i use (see image).I have a trouble with dc-dc stability with IC.With some input voltage and loads It is instable. With l...

If a thyristor (scr) has a dv/dt of 1000V/us, does two same scrs connected in series, have as as a combined switch, a dv/dt of 2000V/us ?

RHF100 inconsistent values for 100 krad characteristics (1.8mV or 0.5%)

RHF100 has following characteristics for reverse breakdown voltage tolerance:1.8mV / 0.15% for 240hrs burn-in (Table 4)1.8mV / 0.5% for 100krad (Table 6)4.2mV / 0.35% for 300krad (Table 7)This data looks very inconsistent. What is correct value for t...

STSW- IDS002V1:GUI can’t go on to work

When I evaluated the STEVAL-ISV021V1 using GUI, there didn’t show any data in the right table and can’t go on to the next process after I clicked on “VOC calc�? button.

Can I get Designing pfc software. Does St have application software for pfc ICs and same for PWM controllers ?

I would like to know the FIT value of model TL1431ACD.

モデルTL1431ACD�?�FIT値を知り�?��?��?��?�。

Low cost DC-DC converter/SMPS design idea and suitable topologies

Hi there,I am looking for a customized design where good power solution can be applicable.My aim is to develop a DC-DC sutable toloplogy ( flyback, buck, isolated ,..so on) converter with following parameter, with the idea https://www.smps.us/topolog...

Disable Vbus in both source/sink role during operation

Hi everyone,I am looking the way to disable charge and enable charge for external device wihin STUSB1602. I guest the register TYPE_C_CTRL 0x11 may help but don't know how to the way to do.Does someone try that? Please help. Thanks in advance.