TD62502,503,504FNG

2006-06-14

6

Notes on Contents

1.

Equivalent Circuits

The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory

purposes.

2.

Test Circuits

Components in the test circuits are used only to obtain and confirm the device characteristics. These

components and circuits are not guaranteed to prevent malfunction or failure from occurring in the

application equipment.

IC Usage Considerations

Notes on Handling of ICs

(1)

The absolute maximum ratings of a semiconductor device are a set of ratings that must not be

exceeded, even for a moment. Do not exceed any of these ratings.

Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result

injury by explosion or combustion.

(2)

Use an appropriate power supply fuse to ensure that a large current does not continuously flow in

case of over current and/or IC failure. The IC will fully break down when used under conditions that

exceed its absolute maximum ratings, when the wiring is routed improperly or when an abnormal

pulse noise occurs from the wiring or load, causing a large current to continuously flow and the

breakdown can lead smoke or ignition. To minimize the effects of the flow of a large current in case of

breakdown, appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are

required.

(3)

If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the

design to prevent device malfunction or breakdown caused by the current resulting from the inrush

current at power ON or the negative current resulting from the back electromotive force at power OFF.

IC breakdown may cause injury, smoke or ignition.

Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable,

the protection function may not operate, causing IC breakdown. IC breakdown may cause injury,

smoke or ignition.

(4)

Do not insert devices in the wrong orientation or incorrectly.

Make sure that the positive and negative terminals of power supplies are connected properly.

Otherwise, the current or power consumption may exceed the absolute maximum rating, and

exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result

injury by explosion or combustion.

In addition, do not use any device that is applied the current with inserting in the wrong orientation

or incorrectly even just one time.

(5)

Carefully select external components (such as inputs and negative feedback capacitors) and load

components (such as speakers), for example, power amp and regulator.

If there is a large amount of leakage current such as input or negative feedback condenser, the IC

output DC voltage will increase. If this output voltage is connected to a speaker with low input

withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The over current can cause

smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied

Load (BTL) connection type IC that inputs output DC voltage to a speaker directly.