TA2170FLG datasheet(7/13 Pages) TOSHIBA

No de pièce	TA2170FLG

Description	Low Current Consumption Headphone Amplifier (Built-in Input Selector)

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Fabricant	TOSHIBA [Toshiba Semiconductor]

Site Internet	http://www.semicon.toshiba.co.jp/eng

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TA2170FLG

2006-04-19

7

3.

Adjustment of DC output voltage

Perform the following with the OUT ADJ pin (pin 13) using the power supply of VCC1 and VCC2:

• If a boost voltage is applied to VCC1, VCC2 is connected to a battery and the difference between VCC1

and VCC2 is greater than or equal to 0.7 V, short pins 13 and 14 together. In this case the DC output

voltage will be as follows:

2

VCC2 .

• If the difference between VCC1 and VCC2 is less than 0.7 V, or if VCC1 and VCC2 are connected to the

same power supply, leave pin 13 open.

In these cases, the DC output voltage will be

2

V

0.7

VCC2 −

.

4.

Switch

(1)

Timing chart

Refer to Figure 2 for the IC timing chart.

(2)

PW SW

The device is ON when this pin is set to High. To prevent the IC being turned ON by external noise, it

is necessary to connect an external pull-down resistor to the PW SW pin. The pin is highly sensitive.

(3)

Mute smoothing

Ensure that the smoothing resistor used for the mute pin is 100 k

Ω or less. The switch circuit will

not operate normally if the value is greater than this.

200 ms

100 ms

OFF

ON

OFF

ON

OFF

OUT

MUTE

ALL MUTE

PW SW

Figure 2. Timing Chart

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