P9221-R Datasheet

© 2017 Integrated Device Technology, Inc.

30

October 10, 2017

First, the maximum power dissipation for a given situation should be calculated using Equation 6:

PD(MAX) =

(TJ(MAX) − TAMB)

θJA

Equation 6

Where PD(MAX) = Maximum power dissipation

θJA = Package thermal resistance (°C/W)

TJ(MAX) = Maximum device junction temperature (°C)

TAMB = Ambient temperature (°C)

The maximum recommended junction temperature (TJ(MAX)) for the P9221-R device is 125°C. The thermal resistance of the 52-WLCSP package

(AHG52) is nominally θJA=47°C/W with 8 thermal vias. Operation is specified to a maximum steady-state ambient temperature (TAMB) of 85°C.

Therefore, the maximum recommended power dissipation is given by Equation 7.

PD(MAX) =

(

124°C − 85°C)

47°C/W

≅ 0.85 Watt

Equation 7

All the above-mentioned thermal resistances were determined with the P9221-R mounted on a standard board of the dimensions and

characteristics specified by the JEDEC 51 standard.

12.2 Recommended Coils

The following coils are recommended with the P9221-R receiver for 15W applications for optimum performance. The recommended vendor

coils have been tested and verified as shown in Table 25.

Table 25. Recommended Coil Manufacturers

Output Power

Vendor

Part number

Inductance at 100kHz

ACR at 20°C

Series Resonant Capacitance

15W

AMOTECH

ASC-504060E00-S00

8.2µH

220mΩ

400nF

15W

TDK

WR424245-13K2-G

11.2µH

170mΩ

300nF

15W

SUNLORD

SWA50R40H06C02B

8.4µH

150mΩ

400nF

15W

WURTH

760308102207

8.0µH

80mΩ

400nF