- 您現(xiàn)在的位置：買賣IC網 > PDF目錄362644 > EL6203CW-T7 (INTERSIL CORP) Laser Driver Oscillator PDF資料下載
參數資料
| 型號： | EL6203CW-T7 |
| 廠商： | INTERSIL CORP |
| 元件分類： | 其它接口 |
| 英文描述： | Laser Driver Oscillator |
| 中文描述： | SPECIALTY INTERFACE CIRCUIT, PDSO5 |
| 封裝： | SOT-23, 5 PIN |
| 文件頁數： | 9/10頁 |
| 文件大?。?/td> | 169K |
| 代理商： | EL6203CW-T7 |
9
Supply Bypassing and Grounding
The resistance of bypass-capacitors and the inductance of
bonding wires prevent perfect bypass action, and 150mV
P-P
noise on the power lines is common. There needs to be a
lossy bead inductance and secondary bypass on the supply
side to control signals from propagating down the wires.
Figure 20 shows the typical connection.
Also important is circuit-board layout. At the EL6203's
operating frequencies, even the ground plane is not low-
impedance. High frequency current will create voltage drops
in the ground plane. Figure 21 shows the output current
loops.
For the pushing current loop, the current flows through the
bypass capacitor, into the EL6203 supply pin, out the I
OUT
pin to the laser, and from the laser back to the decoupling
capacitor. This loop should be small.
For the pulling current loop, the current flows into the I
OUT
pin, out of the ground pin, to the laser cathode, and from the
laser diode back to the I
OUT
pin. This loop should also be
small.
Power Dissipation
With the high output drive capability, the EL6203 is possible
to exceed the 125°C “absolute-maximum junction
temperature” under certain conditions. Therefore, it is
important to calculate the maximum junction temperature for
the application to determine if the conditions need to be
modified for the oscillator to remain in the safe operating
area.
The maximum power dissipation allowed in a package is
determined according to:
where
P
DMAX
= Maximum power dissipation in the package
T
JMAX
= Maximum junction temperature
T
AMAX
= Maximum ambient temperature
θ
JA
= Thermal resistance of the package
The supply current of the EL6203 depends on the peak-to-
peak output current and the operating frequency which are
determined by resistors R
AMP
and R
FREQ
. The supply
current can be predicted approximately by the following
equation:
The power dissipation can be calculated from the following
equation:
Here, V
SUP
is the supply voltage. Figures 22 and 23 provide
a convenient way to see if the device will overheat. The
maximum safe power dissipation can be found graphically,
based on the package type and the ambient temperature. By
using the previous equation, it is a simple matter to see if P
D
exceeds the device's power derating curve. To ensure
proper operation, it is important to observe the
recommended derating curve shown in Figures 22 and 23. A
flex circuit may have a higher
θ
JA
, and lower power
dissipation would then be required.
FIGURE 20. RECOMMENDED SUPPLY BYPASSING
+5V
V
S
L Series: 70
reactance at 300MHz
0.1μF
CHIP
EL6203
GND
0.1μF
CHIP
FIGURE 21. OUTPUT CURRENT LOOPS
SINKING CURRENT LOOP
SOURCING CURRENT LOOP
SUPPLY
BYPASS
LASER
DIODE
R
FREQ
R
AMP
GND
P
DMAX
T
- T
JA
--------------------------------------------
=
I
SUP
------------------------------------------
AMP
FREQ
----------------------------------
0.6mA
+
+
=
P
D
V
SUP
I
SUP
×
=
FIGURE 22. PACKAGE POWER DISSIPATION vs
AMBIENT TEMPERATURE
0.6
0.5
0.4
0.3
0.2
0.1
0
0
25
50
75
100
125
150
AMBIENT TEMPERATURE (°C)
P
85
JEDEC JESD51-3 LOW EFFECTIVE THERMAL
CONDUCTIVITY TEST BOARD
488mW
5PnSOT23
θ
JA
=256°CW
EL6203
相關PDF資料 |
PDF描述 |
|---|---|
| EL6203CW-T7A | Laser Driver Oscillator |
| EL6203CWZ-T7 | Laser Driver Oscillator |
| EL6203CWZ-T7A | Laser Driver Oscillator |
| EL6204 | Laser Driver Oscillator |
| EL6204CW-T7 | Laser Driver Oscillator |
相關代理商/技術參數 |
參數描述 |
|---|---|
| EL6203CW-T7A | 制造商:Rochester Electronics LLC 功能描述: 制造商:Intersil Corporation 功能描述: |
| EL6203CWZ | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Driver Oscillator |
| EL6203CWZ-T7 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Driver Oscillator |
| EL6203CWZ-T7A | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Driver Oscillator |
| EL6204 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Laser Driver Oscillator |
發(fā)布緊急采購，3分鐘左右您將得到回復。