Karosium

Device: Cheap 48V 2A power supply (YU4802) Origin: Aliexpress Reason for teardown: Preemptive checkup Impressions: Not bad for the pri...

I called them "externally triggerable fuse" in my first post . The datasheets call them "Combined Thermal Fuse/Resistor...

Just "adding" because this battery controller is already public. You have the datasheet (pdf) which tells you the pin combination...

The second battery controller I looked at was the Renesas R2J240-10F020. It's a complete black box with very little information avail...

As mentioned in the previous article the bq8030 is the blank version of the bq20z90. If you bought some from Aliexpress they'd come up ...