- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄384114 > BA6820 (Rohm CO.,LTD.) LED level meter driver, 12-point x 2 channel, VU scale, bar display PDF資料下載
參數(shù)資料
| 型號： | BA6820 |
| 廠商： | Rohm CO.,LTD. |
| 英文描述： | LED level meter driver, 12-point x 2 channel, VU scale, bar display |
| 中文描述： | LED電平表驅(qū)動器，12點× 2通道，維旺迪規(guī)模，酒吧顯示屏 |
| 文件頁數(shù)： | 9/10頁 |
| 文件大?。?/td> | 172K |
| 代理商： | BA6820 |
670
Audio ICs
BA6820F / BA6822S / BA6822F
(8)
Pin 11 is the GND for the pin 12 to pin 21 driver circuits,
and pin 10 is the GND for the other signal circuits (see
Fig. 8).
Pins 10 and 11 are not connected internally, so both must
be connected to GND.
The large LED current that flows from pin 11 has a large
high-frequency component, so care must be taken with
regard to the PCB layout to avoid faulty operation of the
IC, and incorrect lighting of the LEDs due to noise.
GND terminal (pins 10 and 11)
Operation notes
(1)
Use the potentiometers VR1 and VR2 connected to
pins 1 and 3 to set the 0dB levels and adjust the channel
1 and channel 2 balance.
(2)
The recommended oscillator frequency is 4kHz
(pin 9). The external component values for C
5
and R
3
are
0.01
μ
F and 41k
(or 39k
). If you wish to use other val-
ues, they should be in the ranges 0.001
μ
F to 0.1
μ
F and
10k
to 100k
. (see Fig. 9).
(3)
The dynamic ranges for the BA6820F and
BA6822S/F comparators are large, and the compara-
tors will operate even with low-level signals.
For this reason, noise may cause the LEDs to light when
they should not, and to prevent this, GND line noise
should be kept sufficiently low.
(4)
Take care to ensure the none of the pins have a volt-
age applied to them that is higher than V
CC
or lower than
GND (e.g. supply the LED current from a source other
than V
CC
).
(5)
In general, the level meter output block is switched
on and off in the range GND to V
CC
, and a large voltage
with a large high-frequency component is generated.
Therefore, if the input and output lines are close, the out-
put may be fed back to the input and cause oscillation,
incorrect LED lighting, or faulty operation of the IC. De-
sign the PCB artwork so that there is no coupling be-
tween the input and output lines or with other units, in the
same way as for linear amplifier PCB design. If they must
be physically close, insert a capacitor between the input
and GND to reduce the AC input impedance, and prevent
noise from entering the input.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BA6848 | 3-phase motor driver for CD-ROMs |
| BA6852 | Spindle and loading motor driver for PD |
| BA6870 | 3-phase motor driver |
| BA6871 | 3-phase motor driver |
| BA6898 | 4-channel BTL driver for CD players |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BA6820F | 制造商:ROHM 制造商全稱:Rohm 功能描述:LED level meter driver, 12-point x 2 channel, VU scale, bar display |
| BA6820F-E2 | 制造商:ROHM Semiconductor 功能描述:LED DRVR 5.5V 40MA 22-PIN SOP T/R - Tape and Reel 制造商:ROHM Semiconductor 功能描述:IC LED DVR 2CH 12POINT 22-SOP 制造商:ROHM Semiconductor 功能描述:LED DRVR 5.5V 40MA 22PIN |
| BA6822F | 制造商:ROHM 制造商全稱:Rohm 功能描述:LED level meter driver, 12-point x 2 channel, VU scale, bar display |
| BA6822F-E2 | 制造商:ROHM Semiconductor 功能描述:IC, 12X2 LEVEL METER DRIVER, 22 PIN SOP /TAPE & REEL - Tape and Reel 制造商:ROHM Semiconductor 功能描述:IC LED DVR 2CH 12POINT 22-SOP 制造商:ROHM Semiconductor 功能描述:IC LVL METER DRIVER 22PIN 12X2 |
| BA6822S | 制造商:Panasonic Industrial Company 功能描述:IC |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。