LV4993TH Ver la hoja de datos (PDF) - SANYO -> Panasonic

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LV4993TH

For Portable Audio Equipment Monaural BTL Power Amplifier

SANYO -> Panasonic 

LV4993TH

6. Pin 2 control (second amplifier stop control function)

Pin 2 are pin that control ON/OFF as for the movement of the second amplifier of the BTL amplifier. The switch of the

speaker drive (BTL output method) and the earphone drive (shingle end output method) can operate by using this

function. Moreover, it is possible to use it as a voice mute function in the BTL output method.

Second amplifier ON ⇒ V2 = 1.6 to VCC or OPEN

Second amplifier OFF ⇒ V2 = 0 to 0.3V

Make it to the opening when this function is not used.

7. Load capacitance

The phase margin degree of the power amplifier might decrease by the influence of this capacitor when the capacitor is

connected by the purpose of the anti-electric wave radiation measures etc. between output pins GND and the

oscillation be caused. Note the capacity value when you add this capacitor.

Recommended capacity value: 100pF or less or 1000pF to 1μF

8. Thermal protector circuit

The thermal protector circuit is built into in IC, and when heat is abnormally generated because of some causes, the risk

of destruction/deterioration can be reduced. The protection circuit operates when junction temperature (Tj) of the chip

in IC rises to about 165℃, the current supply source to the power amplifier is intercepted, and the signal is not output.

It returns automatically if the temperature of the chip decreases (about 140℃). This circuit must note handling enough

because it is able surely not to prevent destruction/deterioration. Turn off power promptly when you abnormally

generate heat, and pinpoint the cause.

9. Short-circuit between pins

When power is applied with pins left short-circuited, deterioration or damage may result.

Therefore, check before power application if pins are short-circuited with solder, etc. during mounting of IC to the

substrate.

10. Short-circuit of load

If the load is left short-circuited for a long period of time, deterioration or damage may occur.

Never allow the load to short-circuit.

11. Maximum rating

When IC is used near the maximum rating, there is a possibility that the maximum rating may be exceeded even under

the smallest change of conditions, resulting in failure. Take the sufficient margin for variation of supply voltage and

use IC within a range where the maximum rating will never be exceeded.

No.A1834-7/13

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