參數(shù)資料
型號: TA2092AN
廠商: Toshiba Corporation
英文描述: Power Driver IC for CD Player
中文描述: CD播放機功率驅(qū)動IC
文件頁數(shù): 5/7頁
文件大?。?/td> 207K
代理商: TA2092AN
TA2092AN
2001-08-28
5
Precaution Use
Input stage
Input stages are consisted of differential circuit of PNP Tr, and have built-in base current compensation
circuit.
Built-in driver
Each channel driver consists of BTL configuration linear amplifier.
Voltage gain is fixed: G
V
= 15.5dB (typ.)
Voltage loss for output stage is 2 V
BE
= V
CE (sat)
for positive cycle, V
CE (sat)
for negative cycle, because of
no-bootstrap circuit. So, output DC voltage is designed as less than 1/2 V
CC
.
V
RI
terminal
V
RI
is reference voltage terminal for input signal.
If reference voltage from servo IC drop less than 1.1 V, protection circuit operates and shut off bias circuit
inside. This operation is to prevent load from moving undesireably in case of V
RI
drop for accident or some
reason.
V
CI
terminal
Output DC voltage is determined by circuit of this terminal inside as;
V
CI
= V
OUT (DC)
= (V
CC
V
F
) /2
Output signal dynamic range is depend on V
CC
. On the other hand, input signal dynamic range is determined
by V
RI
as mentioned and voltage gain is fixed inside. So, maximum output voltage does not increase as V
CC
increases.
Because of BTL configuration, Ripple Rejection Ratio does not improve not much when capacitor is connected
to V
CI
terminal to GND.
GND
Large signal GND is for output stage and small signal GND is for stages from input circuit to pre-output
stage.
These GND pins are not connected inside.
The heat of power dissipation is transferred to PCB, through these PW-GND Pin, because, 1, 12, 13, 24 pin
are connected each other and to substrate of Pellet to connected copper foil area as large as possible.
Oscillation preventive capacitor
We recommend to use the capacitor of 0.1 μF, between each output terminals. But perform the temperature
test to check the oscillation allowance, since the oscillation allowance is varied according to the causes
described below.
1) Supply voltage
2) Ambient temperature
3) Load impedance
4) Capacity value of condenser
5) Kind of condenser
6) Layout of Printed board
We recommend to connect Pass-condenser, which is about 47 to 100 μF between V
RI
terminal and GND.
V
CI
terminal is recommend to use “OPEN”.
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