Tai-1 Microelectronics

TMPA401DM

www.taimec.com.tw

May 25, 2005

Copyright

©2004,Tai-1 Microelectronics Corp.

10

0.1

μ F

0.1

μ F

Vo+

Vo-

33μH

33μH

0.47

μ F

LC Output Filter(4), Speaker Impedance= 6

Ω & 8Ω

100pF

100pF

Vo+

Vo-

Ferrite

Chip Bead

Ferrite

Chip Bead

Typical Ferrite Chip Bead Filter

（Chip bead example：遠越科技 KML2012Q102N

1kohms@100MHz, DCR=0.2ohms, I=1A）

Over temperature protection

A temperature sensor is built in the device to detect the temperature inside the device.

When

a high temperature around 145oC and above is detected the switching output signals are

disabled to protect the device from over temperature. Automatic recovery circuit enables the

device to come back to normal operation when the internal temperature of the device is below

around 120oC.

Over current protection

A current detection circuit is built in the device to detect the switching current of the output

stages of the device. It disables the device when the current is beyond about 3.5amps. It

protects the device when there is an accident short between outputs or between output and

power/gnd pins It also protects the device when an abnormal low impedance is tied to the

output. High current beyond the specification may potentially causes electron migration and

permanently damage the device. Shutdown or power down is necessary to resolve the

protection situation. There is no automatic recovery from over current protection.

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