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參數(shù)資料
| 型號： | BA5995FM |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | BTL driver for CD/CD-ROM |
| 中文描述： | 橋接驅(qū)動的CD / CD - ROM光碟 |
| 文件頁數(shù)： | 7/8頁 |
| 文件大?。?/td> | 122K |
| 代理商： | BA5995FM |
BA5995FM
Optical disc ICs
!
Operation notes
(1) Thermal shut down circuit is built in. In case IC chip temperature rises to 175
°
C(typ.), thermal shut down circuit
operates and muted the output current. Next time IC chip temperature falls below 150
°
C(typ.), the driver blocks start.
(2) Bias pin (pin1) should be pulled up more than 1.3V. In case bias pin voltage is under 0.7V(typ.), output current is
muted.
(3) In case supply voltage falls below 3.8V(typ.), output current is muted. Next time supply voltage rises to 4.0V (typ.), the
driver blocks start.
(4) Mute operation is caused by thermal shut down, decrease of bias pin voltage or decrease of supply voltage.
When mute is done, output voltage becomes internal reference voltage (about PowVcc/2).
(5) In case of one of the standby terminals turn into or open , correspondence channel circuit (include opamps) is muted.
(6) Both of the standby terminals low or open, all circuits shutdown (sleep mode) and all output pins become high
impedance. In addition to threshold is 1.4V(typ.).
(7) Supply voltage of PreV
CC
should be equal to or higher than PowV
CC
.
(8) Take care the external resistor value of OPamp .
OPamp source current supplies to internal resistor (10K
) as well as external resistor.
CC
pin and GND pin of IC as near as possible (approximately 0.1
μ
F).
(10) Keep the GND pin voltage the lowest of all pins .
(11) Heat dissipation fins are attached to the GND on the inside of the package. Make sure to connect these to the
external GND.
(12) If the mute pin (pin6) voltage rises above 2.0V, the output (CH1) current can be muted.
Under normal operating conditions, make sure to open pin7 or pull it down below 0.5V.
Next figure is high impedance mute timing chart.
7/8
2V
MUTE
(Pin6)
0V
t
tm
t
V
OM
V
OUT
(Pin14-Pin13)
0V
0.5mV
PreV
CC
=12V
PowV
CC
1=5V
BIAS=1.65V
R
L
=8
tm
≤
125
μ
sec
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