6HUI07501833 - BC004 busch charger chip

[michelstlouis]

First I have a very limited knowledge in electronic,
There is a chip on my bosch BC004 charger, the charger is defective and I will check every component.
I cannot find any datasheet or any info for a chip that is on the board. I tried the ST web site, Google, bing... nothing

the chip is a ST
First line : 6HUI07501833
Second line: GK4520MC

thanks for the help
Michel