bd5445efv ROHM Co. Ltd., bd5445efv Datasheet - Page 30

• Manufacturer Part Number: bd5445efv
• Description: Analog Input / Single End Output Class-d Speaker Amplifier
• Manufacturer: ROHM Co. Ltd.

© 2010 ROHM Co., Ltd. All rights reserved.
BD5445EFV
●Allowable Power Dissipation
www.rohm.com
Measuring instrument：TH-156（Kuwano Electrical Instruments Co., Ltd.）
Measuring conditions：Installation on ROHM’s board
Board size：70mm×70mm×1.6mm（with thermal via on board）
Material：FR4
・The board on exposed heat sink on the back of package are connected by soldering.
PCB①：1-layer board（back copper foil size: 0mm×0mm） ， θja＝86.2℃/W
PCB②：2-layer board（back copper foil size: 70mm×70mm） ，θja＝37.8℃/W
PCB③：4-layer board（back copper foil size: 70mm×70mm） ，θja＝26.6℃/W
6
5
4
3
2
1
0
0
PCB① 1.45W
PCB② 3.3W
PCB③ 4.7W
PCB① 1.45W
PCB③ 4.7W
PCB② 3.3W
10
20
30
Ambient temperature :Ta (℃)
40
50
60
30/31
70
80
90
100 110 120 130 140 150
Technical Note
2010.05 - Rev.B