BQ24314C Datasheet, PDF (17/26 Pages) Texas Instruments – Li+ Charger Front-End Protection IC

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bq24314C
SLUSAV3A – AUGUST 2012 – REVISED JULY 2015
9 Power Supply Recommendations
The intention is for the bq24314C device to operate with 5-V adapters with a maximum current rating of 1.5 A.
The device operates from sources from 3 V to 5.7 V. Outside of this range, the output is disconnected due to
either UVLO or the OVP function.
10 Layout
10.1 Layout Guidelines
• This device is a protection device, and is meant to protect down-stream circuitry from hazardous voltages.
Potentially, high voltages may be applied to this IC. It has to be ensured that the edge-to-edge clearances of
PCB traces satisfy the design rules for high voltages. See Figure 23.
• The device uses WSON packages with a thermal pad. For good thermal performance, the thermal pad must
be thermally coupled with the PCB ground plane (GND). This requires a copper pad directly under the device.
This copper pad should be connected to the ground plane with an array of thermal vias.
• Ensure that external C_IN and C_OUT are located close to the device. Other external components like R_ILIM and
R_BAT must also be located close to the device.
10.2 Layout Example
VOUT
VIN
GND
Figure 23. Layout Example Recommendation
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