BQ24103: Thermal Considerations

guoqing shi

Part Number: BQ24103

Hi，Engineer Team：

At present, the lithium battery charger is designed with BQ24103 IC, and the designed charging current of the battery end is 2A. The layout design follows the guidance on the datasheet. The sample measured that the temperature of the IC reaches 125 ℃, and the temperature is too high. Would you like to help me see if such a high temperature is normal? What design documents do I need to provide you for your reference.

over 2 years ago

0 Kedar Manishankar over 2 years ago

TI__Mastermind 24075 points

Hi,
Connect the QFN through vias to the 2nd layer, which should be clean ground copper plane. This will help improve thermal performance. Refer to section 11 of the datasheet for layout guidelines.

0 guoqing shi over 2 years ago in reply to Kedar Manishankar

Intellectual 305 points

Hi，

Is there any other reason? The heat dissipation pad has been perforated to the second laye

+1 Kedar Manishankar over 2 years ago in reply to guoqing shi

TI__Mastermind 24075 points

Thermal dissipation will solely be due to layout, since this part has integrated FETs for switching, all the power loss will be localized to IC package. The layout consideration for clean ground plane for ground reference of power pins becomes more important.

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BQ24103: Thermal Considerations