Note that it is recommended to use remote SLD switching on and off as suggested by the circuit diagram shown in Figure 3 below. SLD drive current and current limit are pre-set at Superlum to ensure optical parameters as specified in Table 3 above. It is only necessary to apply DC voltage to get them up and running in this case. SLD-MS- 381-MP-795 and SLD-MS-381-MP-850 have similar spectra centered around 795 and 850 nm, correspondingly. Typical spectrum examples linear and logarithmic plots of spectral density. Typical spectrum examples linear and logarithmic plots of spectral density SLD-MS-381-MP-830. Less powerful DC power supplies may be used in case of lower SLD drive currents. Scaling coefficients of control outputs are described in Table 5 below. Standard models of SLD-MS light sources optical performance parameters. More examples, including coherence functions, may be checked by checking the ratings of corresponding SLD module at Note that any SM-fiber coupled temperature controlled SLD of Superlum may be used in SLD-MS if SLD current does not exceed 250 ma. Typical examples of output spectrum are available in the chapter Performance examples below. Optical characteristics of standard models are shown in Table 3 below. Electrical and Optical Characteristics Optical parameters of SLD-MS light sources are determined by SLD module used. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. This is a stress rating only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this specification is not implied. Absolute Maximum Ratings Table 2 below presents absolute maximum ratings of SLD-MS light sources. Attention: DC supply ground, analog ground and case of SLD MS light source module are connected inside SLD MS unit. Attention: It is not recommended to connect logic ground to analog ground as it may result in increased noise. Goes to low impedance state in case of system error 2,4,6,8,10 LOGIC GND Logic ground. Goes to low impedance state when the SLD current limit is reached. Goes to low impedance state when SLD is ON. Goes to low impedance state when the SLD temperature setpoint is NOT reached. Pin configurations for SLD-MS control ports and power supply connectors. Electrical connections Electrical connections of a standard SLD-MS light source are shown in Figure 2 below. TEC, SLD ON, LIMIT, ALARM SLD-MS status LEDs. LIMIT potentiometer for setting SLD current limit. #ROHS COMPLIANT 2002 95 EC DRIVER DOWNLOAD FREE#Particularly, highest operating temperature without external heatsinking is +40 C for all models and up to +50 C for selected models free air circulation around the package is required. However, it is also possible to use SLD-MS without heatsinking, although in a limited range of ambient temperatures. Light source modules must be put onto an appropriate heat sink for getting a widest possible operating temperature range. Indicating LEDs on a top cover of a light source allow easy visual control of light source status. Modulation rate may be extended to 100 khz upon request. It also provides a number of SLD protection means, including independent limiting of maximum possible SLD drive current. Low noise internal DC-DC converter protects SLD and controller from possible variation and a short-term instabilities of external DC supply. Controller should be supplied by a V DC voltage. SLD module inside a light source is powered up by a highprecision miniature current and temperature controller. Miniature SLD based Light Source Modules.
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