RPM971-H14
Photo Link Module
7/8
Block diagram and application circuit
POWER
DOWN
/Mode
TXD
TXD
RXD
C1
LEDA
NC
RXD
PWDOWN/Mode
VCC
VIO
GND
PWDOWN
/Mode
VCC
VIO
GND
R1
LEDVCC
Attached components
C1
R1
Part symbol
Recommended value
6.8礔, Ceramic or tantalum
Bigger capacitance is recommended with
much noise from power supply.
Including LED's distribution within ?5deg.
5.6& ?%, 1/4W (LEDVCC=3.0V)
10& ?%, 1/4W (LEDVCC=3.7V)
18& ?%, 1/4W (LEDVCC=5.0V)
Ex.)TCFGA1A685M8R(ROHM)
Notice
In case of using R1 with different condition from the above, formula is as follows :
LED resistance value : R1 [&], LED average consumption current : ILED [mA], Supply voltage : VLEDVCC [V], minimum
necessary of irradiant intensity Ie1 [mW / sr]
R1 = 170 ?(VLEDVCC 1.45) / Ie1 5 [&]
ILED = Duty ?(VLEDVCC 1.36) / (R1+4) [A]
Duty : LED duty at emitting
Please set up to be ILED < 180[mA] (Duty d 25%).
发布紧急采购，3分钟左右您将得到回复。
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