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参数资料
| 型号： | MC10SX1130DG |
| 厂商： | ON Semiconductor |
| 文件页数： | 6/9页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LINEAR 16-SOIC |
| 标准包装： | 48 |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 通用 |
| 频率： | 300MHz |
| 电源电压： | +5V，-5.2V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | MC10SX1130DGOS |
MC10SX1130
APPLICATIONS INFORMATION
Introduction
The MC10SX1130 is intended to be integrated into high
performance fiber optic modules or used stand-alone to
drive a packaged optical LED device. The wide frequency
response of the device allows it to be used to support a
variety of digital communication applications ranging from:
? OC1/3 SONET/SDH Links
? 100 MBit/s FDDI
? 155 MBit/s ATM
? 133/266 MBit/s FibreChannel
To support such wide ranging application areas, the LED
Driver incorporates a variety of unique features. These offer
designers added flexibility that could not previously be
realized in less integrated designs.
LED Characteristics
LED devices emit light when forward biased. The optical
power emitted by an LED is determined by the amount of
current flowing through the device. This relationship is a
relatively linear function of the current, until the device
saturates. In some ways, an LED device behaves much like
a traditional small signal silicon diode, although the forward
“ON” voltage of an LED is much larger and ranges from
1.0 V to 2.0 V. In addition, for a fixed amount of current, the
optical power from the LED will decrease if the device
junction temperature increases. Another behavior of most
LED devices is that they have unequal turn-on and turn-off
times. In developing an LED transmitter, the designer must
wrestle with all these behaviors to develop a product that
meets the design targets.
LED Driver
The MC10SX1130 LED Driver accepts a digital binary
data stream which is processed by the driver circuitry to
create a current waveform to modulate the LED device. The
LED Driver contains circuitry to program the modulation
current, pre-distort the input waveform to partially
compensate for the LED turn-on/turn-off delay, and
compensate for the negative optical output power tracking
co-efficient. The LED Driver operates from a +5 V supply
for PECL applications or a ? 5.2 V supply for traditional
ECL systems. For further information on PECL, please
consult “Designing with PECL Application Note”,
AN1406/D available from a ON Semiconductor
representative.
Circuit Blocks
Some of the key sub-circuits in the LED Driver are listed
below:
? Input Line Receiver
? Pulse Stretcher
? Bias Control Circuitry
? Output Current Switch
The data input circuitry has been realized as a traditional
differential ECL line receiver. It can accept either
differential 100K or 10KH style ECL or PECL depending on
the supply voltage used. In addition, a V BB reference is
provided for use in single ended applications. This reference
is useful if the input signal must be AC coupled into the
device.
The pulse stretcher provides two choices of duty cycle
pre-distortion. It is controlled by the input STRETCH
signal. When the pin is left open, no pre-distortion is applied
to the input waveform. If the pin is strapped to the upper or
lower rail, then the output waveform low pulse width will be
increased. In a +5 V application, when the STRETCH pin is
tied to +5 V, the nominal pulse width increase is 155 ps and
when it is connected to 0 V, the nominal pulse width is
increased by 310 ps.
The bias control circuitry regulates the voltage supplied at
the RSET pin of the output current switch. In addition, it
implements a positive tracking circuit which provides open
loop temperature compensation for the LED’s negative
tracking coefficient. An external resistor connected between
the RTCO 1 and RTCO 2 is used to select the rate of voltage
change at the RSET pin.
The output current switch is the final stage in modulating
the LED. The emitter of the current source is pinned out so
that an external resistor can be used to set the modulation
current. This circuit is implemented using a fully differential
gate where both collectors are brought out. As the LED is
modulated on and off, the current switches from one
collector to another. This architecture minimizes the
switching noise inherent in some LED driver design
topologies where the modulation current is actually turned
on and off.
Design Considerations
Once the user has selected an LED, the driver circuitry
should be optimized to match the characteristics of the LED.
The three circuit blocks previously described allow the user
to control the pulse width adjustment, LED drive current and
temperature tracking rate. A very simple example may best
illustrate the design process steps.
An LED has been selected which has the desired optical
output power when modulated with a waveform of 65mA.
In addition, the LED has an output power tracking
coefficient of ? 0.5%/ ° C. Thus for every 1 ° C rise in the case
temperature of the LED, the output power will decrease by
0.5% of the nominal value. In addition, the LED forward
voltage is 1.5 V.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC10SX1130DR2 | 功能描述:LED照明驱动器 BBG ECL COAX CABL RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MC10SX1130DR2G | 功能描述:LED照明驱动器 BBG ECL COAX CABL RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MC10SX1189D | 功能描述:缓冲器和线路驱动器 Fiber Channel Coax RoHS:否 制造商:Micrel 输入线路数量:1 输出线路数量:2 极性:Non-Inverting 电源电压-最大:+/- 5.5 V 电源电压-最小:+/- 2.37 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Reel |
| MC10SX1189DG | 功能描述:缓冲器和线路驱动器 Fiber Channel Coax Calbe Driver RoHS:否 制造商:Micrel 输入线路数量:1 输出线路数量:2 极性:Non-Inverting 电源电压-最大:+/- 5.5 V 电源电压-最小:+/- 2.37 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Reel |
| MC10SX1189DR2 | 功能描述:缓冲器和线路驱动器 Fiber Channel Coax RoHS:否 制造商:Micrel 输入线路数量:1 输出线路数量:2 极性:Non-Inverting 电源电压-最大:+/- 5.5 V 电源电压-最小:+/- 2.37 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Reel |
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