STWBC-EPTR datasheet(28/32 Pages) STMICROELECTRONICS

Part #	STWBC-EPTR

Description	Digital controller for wireless battery chargers transmitters for Qi 15 W applications

PDF	32 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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Thermal characteristics

STWBC-EP

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DocID030747 Rev 1

Thermal characteristics

The STWBC-EP functionality cannot be guaranteed when the device is operating under the

maximum chip junction temperature (TJmax).

TJmax, in degrees Celsius, may be calculated using the following equation:

TJmax = TAmax + (PDmax x JA)

where:

TAmax is the maximum ambient temperature in °C.

ΘJA is the package junction to ambient thermal resistance in °C/W.

PDmax is the sum of PINTmax and PI/Omax (PDmax = PINTmax + PI/Omax).

PINTmax is the product of IDD and VDD, expressed in Watts. This is the maximum chip

internal power.

PI/Omax represents the maximum power dissipation on output pins where:

PI/Omax =  (VOL * IOL) + [(VDD - VOH) * IOH], taking into account the actual VOL/IOL and

VOH/IOH of the I/Os at the low and high level.

Table 15. Thermal characteristics

Symbol

Parameter

Value

Unit

JA

Thermal resistance junction ambient(1)

1. Thermal resistances are based on JEDEC JESD51-2 with the 4-layer PCB in a natural convection

environment.

°C/W

STWBC-EPTR Datasheet(PDF) 28 Page - STMicroelectronics