Topping E70 SMPS part (IC) identification

[zenonn67]

Hello guys!
I need some help.
SMPS regulator on the picture is from Topping E70 DAC.
The SMPS IC converts 5V to +/- 5.6V, which feed the analog part of Е70.
Its manufacturing marking, evident from the photo, is something like DP0 3U7.
Do any of you have any idea what IC is?

 

[jan.didden]

It uses 2 ea. 4/78uH inductors for the converter, that's sort of standard.
You may be able to search in a place like Mouser for 'dual boost converter',
eliminating step by step based on # of pins etc.
Did you break it?

Jan

 

[Logon]

Do any of you have any idea what IC is?

Topping has a great Customer Care Service, send them an email and you'll know.

https://www.diyaudio.com/community/threads/topping-e50.403589/post-7461249

 

[zenonn67]

It uses 2 ea. 4/78uH inductors for the converter, that's sort of standard.
You may be able to search in a place like Mouser for 'dual boost converter',
eliminating step by step based on # of pins etc.
Did you break it?

Jan

Thanks!
Everything is OK, it works normally, but I want to know what the characteristics of the IC are, and check if Topping did a good job implementing this IC.

Regards
Ivo

 

[jan.didden]

You should be able to judge the implementation quality without knowing the exact chip part number.
Unless you mean 'to see if they followed the app note in the data sheet'.

Jan

 

[EUVL]

https://smd.yooneed.one/


Patrick

 

[zenonn67]

RICOH R1286K
2ch. PWM Step-up / Inverting DC/DC Converter with Synchronous Rectifier

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