TA2123AF 查看數據表（PDF） - Toshiba

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TA2123AF

TOSHIBA Bipolar Integrated Circuit Silicon Monolithic

Toshiba 

TA2123AF

3. Total

(1) Ripple filter

It is necessary to connect a low saturation transistor (2SA1362 etc.) for ripple filter, because this IC

doesn’t have transistor for ripple filter. Care should be taken to stabilize the ripple filter circuit, because

the ripple filter circuit supplies internal circuit except power drive stage with power source.

(2) Switch terminal

(a) PW SW

It is necessary to connect an external pull-down resistor with terminal PW SW, in case that this IC is

turned on due to external noise etc. (The PW SW sensitivity is designed highly.)

(b) MT SW, BST SW, F / R SW, PRE SW, M / N SW

The current flows through terminals of MT SW, BST SW, PRE SW and M / N SW, in case that these

terminals are connected with VCC line independently, even though the PW SW is off-mode. It is

necessary to connect an external pull-down resistor with each terminals in case that IC is turned on

due to external noise etc. These switches are designed highly.)

· The pop noise at turning on / off MT SW can be reduced by the external capacitor of the MT TC

terminal.

(c) C-AMP SW

The C-AMP SW terminal should not be connected with high voltage of VCC etc., because internal

circuit is broken.

(d) Sensitivity voltage of each switch (Ta = 25°C)

(1) MT SW,F / R SW,PRE SW,PW SW

2.5

2.2V

2

1.5

H

(2) BST SW,M / N SW

2.5

2.2V

2

1.5

H

1

0.8V

0.5

0.3V

L

0

1

1.5

2

2.5

Supply voltage (V)

1

0.8V

0.5

0.3V

L

0

1

1.5

2

2.5

Supply voltage (V)

MT SW (V41) F / R SW (V44) PRE SW (V45) PW SW (V42)

'H'

Muting OFF REV mode Preamp. OFF

IC ON

'L'

Muting ON FWD mode Preamp. ON

IC OFF

BST SW (V43) M / N SW (V46)

'H', open

'L'

BST ON

BST OFF

Metal mode

Normal mode

13

2002-10-30

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