ELM185 is a laser diode driver (LD driver IC) with an integrated APC (Automatic Power Control) circuit.
**Overview** The ELM185xB is a bipolar structure laser diode driver IC that incorporates an APC circuit consisting of a reference voltage source and an error amplifier. It stabilizes the laser output against changes in supply voltage and temperature using the reference voltage source within the IC. The driver output can drive laser currents of up to 400mA. Due to its compact package, it allows for implementation in a minimal area. As a protective feature, it includes a cutoff circuit for abnormal high temperatures and has the capability to limit the laser drive current in case of control loop failure. The current limit value can be set using an external resistor. It also has a built-in surge-absorbing Zener diode (Vz≈7V) between the power supply (VCC-GND) to prevent laser diode damage. It can drive multiple types of laser diode modules (LDM). Furthermore, it is possible to use the built-in constant current setting function for open-loop constant current driving, rather than driving through APC control, allowing it to be used as an open-loop constant current driver for laser diodes, high-brightness LEDs, and more. *For more details, please refer to the catalog or feel free to contact us.*
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basic information
【Features】 • Low voltage operation : 2.0V • Low current consumption : Typ.1mA • Laser drive current : Max.400mA • Internal reference voltage : Typ.0.30V • High temperature cutoff circuit: Typ.150℃ • Compact package : SOT-26, WSON6-2x2 • Built-in Zener diode for power surge absorption
Price range
P1
Delivery Time
※The delivery time may vary depending on the quantity, so please feel free to contact us.
Applications/Examples of results
<Application Examples> Laser pointer For driving laser diodes such as laser levels For driving constant current loads like LEDs
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Company information
In the IT devices where miniaturization and lightweight design have become standard, analog semiconductors are essential for realizing digital systems. Elm Technology has responded to various market needs with its compact and high-quality ICs under its own brand. Elm Technology operates from its headquarters in Tokyo, the Okinawa Technology Center, Elm High Tech (partner in Taiwan), and ELM Korea (local subsidiary), engaging in the design, development, and sales of ICs for AV equipment, PC peripherals, and various other applications. Additionally, we also develop custom ICs. 【Products Offered】 Logic ICs, operational amplifiers, voltage detectors, light sensors, high-speed logic ICs, DC-DC converters, voltage regulators, SPI flash memory, voltage comparators, DC-DC converter modules, special functions (LED drivers, laser diode drivers, IF detection ICs), bipolar transistors, MOSFETs (single power MOSFETs, dual power MOSFETs, complementary power MOSFETs).