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參數(shù)資料
| 型號： | M66503ASP |
| 廠商： | Mitsubishi Electric Corporation |
| 元件分類： | LED驅動器 |
| 英文描述： | 16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH |
| 中文描述： | 16位恒流LED驅動器的移位寄存器和鎖存 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 114K |
| 代理商： | M66503ASP |
4
MITSUBISHI
DIGITAL ASSP
M66503ASP/AGP
16-BIT CONSTANT CURRENT LED DRIVER with SHIFT REGISTER AND LATCH
OPERATION
1. LED Drive Current Settings
The M66503A has an internal power supply, which pro-
vides a constant current to each bit output. The output
value of the constant current is set by means of a load re-
sistor, RC,connected between the RC pin and GND and is
approximated by the equation below.
I
O
(Q
n
) =5·V
CC
/(2·RC +100)
2. Switching Operation
If the output data of the latch is “H”, LED lights up. The
value of the LED drive current is I
O
(Q
n
). If the output data
of the latch is “L”, LED goes off, and the LED drive current
becomes nearly zero, irrespective of the value of I
O
(Q
n
).
3. How to Use the OE
A
and OE
B
Inputs
If OE
A
= “L” and OE
B
= “L”, all output currents are turned
off. Accordingly, it is possible to prevent a large current
from flowing through LESs by, for example, fixing both
OE
A
and OE
B
to “L” until V
CC
, after turned on, reaches a
steady state. If OE
A
=“H”, all output currents turn on. This
function facilitates the checking of LEDs for failure. When
OE
A
=“L” and OE
B
=“H”, each output current turns on and
off according to the output data of the latch.
4. V
CC
and GND Pins
Pins related to the power supply function are V
CC
and
GNDs 1-5 (GNDs 1-3 for the M66503AGP). The role of
these pins in terms of the internal circuits are as follows.
V
CC
: commonly used by both digital and
analog circuits
GND 1
: used by digital circuits
GNDs 2-5 (2-3)
: used by analog circuits
In practical wiring, the following should be noted.
(1)Secure as much width as possible for conductors and
avoid lengthy wiring.
(2)Allocate electrolytic capacitors for stable voltage near V
CC
and GNDs 2-5 (2-3).
(3)Allocate by-pass capacitor near V
CC
and GND1.
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相關代理商/技術參數(shù) |
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| M66510 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:LASER-DIODE DRIVER |
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| M66510P | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:LASER-DIODE DRIVER |
| M66512FP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:LASER-DIODE DRIVER |
| M66512P | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:LASER-DIODE DRIVER |
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