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DRV110: Ripple on Input Voltage

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Part Number:DRV110

I'm trying to implement a economizer circuit with a DRV110.

In the first implementation I wasn't able to keep the relays closed.

After some tweaking (first response) I got the relay to stay closed but had massive ripples on the input voltage. 

12V Input 
Ihold 0,1A -> 606k Ohm
Ipeak 0,4A -> 149k Ohm
tkeep ,5s -> 47µF

Rsense 1 Ohm

Mosfet DMN6040

With this setup I get the following measurements:

Voltage @Relay

Voltage At Relay

Voltage at Mosfet

Voltage At Mosfet

Voltage At Rsense

Voltage at Rsense


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