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USB EZ-PD™ Type-C Forum Discussions

Ivan_Lee
Level 5
100 sign-ins First like received 50 replies posted
Level 5

 

1. Does "VBAT to GND protection" and "VBUS OCP" use the same - resistor current sensor to detect  current ? ( pin#18 and pin#19)

2.  Application note : This resistor senses the current, and if it exceeds the firmware-configured threshold, the NFET is
turned off to interrupt the current. This protects against over-current conditions caused by external faults

How to set "VBAT to GND" firmware-configured threshold to different value ?

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1 Solution
PranavaYN
Moderator
Moderator 50 likes received First comment on KBA First question asked
Moderator

Hi,

VBat to GND protection uses the low-side CSA pins that you have mentioned. VBus OCP uses a high-side current sense resistor. They are 2 separate resistors. You can refer to the Application diagram present in the datasheet for this.

Regarding the threshold configuration, please refer to pd_internal_vbat_gnd_scp_level_set() API in the source code. This is used to change threshold value.

VBUS UVP is detected from VBUS_C pin which is connected to the VBUS of the Type-C Connector.

Best regards,
Pranava

View solution in original post

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3 Replies
Ivan_Lee
Level 5
100 sign-ins First like received 50 replies posted
Level 5

Sorry i have another question which pin is used for detection UVP?

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Roy_Liu
Moderator
Moderator 1000 replies posted 500 solutions authored 5 questions asked
Moderator

You may start a new thread if this is still an open question.😊

Roy Liu
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PranavaYN
Moderator
Moderator 50 likes received First comment on KBA First question asked
Moderator

Hi,

VBat to GND protection uses the low-side CSA pins that you have mentioned. VBus OCP uses a high-side current sense resistor. They are 2 separate resistors. You can refer to the Application diagram present in the datasheet for this.

Regarding the threshold configuration, please refer to pd_internal_vbat_gnd_scp_level_set() API in the source code. This is used to change threshold value.

VBUS UVP is detected from VBUS_C pin which is connected to the VBUS of the Type-C Connector.

Best regards,
Pranava
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