HY6330 Laser Diode Driver Switchable Constant Current Laser Diode Driver Micro-heaters Description: Features: ✦ ✦ ✦ ✦ TEC Controllers Laser Diode Drivers ✦ Adjustable current to 170mA @ 5Volts Enable/disable pin For common cathode or isolated laser diode current drive Very small size Thru-hole or surface-mount package option The HY6330 Laser Diode Driver is a programmable voltage controlled constant current transconductance amplifier with optical feedback. The HY6330 is used in applications that require a stable, selectable current source to drive a laser diode. The current is selectable from zero to over 170mA. Constant optical output power can be maintained using feedback from a back facet photodetector. Optical output can also be monitored using the voltage proportional output provided. The HY6330 comes in 10-pin thruhole or surface mount packages. The HY6330 is designed for applications requiring constant current drive for the operation of laser diodes such as pump sources for EDFA’s telecom lasers, and diode pumped semiconductors. FIGURE 1 FIGURE 2 28 • 400 Hot Springs Road, Carson City NV 89706 • (775) 883-0820 • Fax (775) 883-0827 • www.hytek.com HY6330 Laser Diode Driver Input Specifications Power Supply Input (VCC): Pins 1, 10 Drive Enable (EN): Pin 9 Current Control (CC): Pin 6 Ground (GND): Pins 5, 7 Feedback-Optical (FB): Pin 3 Feedback-Enable (FEN): Pin 8 +5 to +8V @250mA max. GND (off, disable), VCC or open (on, enable) 0 to 200mA for input voltage 0 to VCC Power supply ground 0 <FB <VCC VCC (disable), GND or open (enable) Output Specifications Laser Diode Current Drive (IOUT): Pin 2 Optical Output Monitor (VOPT): Pin 4 0 to 170mA @ 5V, 0 to 250mA @ 8V Range 0–4V Environmental Conditions Operating Temperature Storage Temperature –20°C to 100°C (case) –65°C to 150°C (case) Signal Descriptions VCC Input power supply, +5 Volts typical EN The Enable pin is used to enable/disable the output. When the Enable pin is connected to ground, the output is disabled. When this pin is connected to VCC or left open, the laser current is enabled, allowing current to flow through the laser diode. CC The current is set by the voltage at the current control input. The voltage, on the current control input, programs the laser diode drive current, IOUT. When the input is at GND the modulation current is zero. Maximum laser current occurs when this voltage is VCC. GND Ground return for VCC (input power supply). FB This high impedance input is used with a photodetector to control Output Current. FEN At VCC this input disables Feedback on Pin 3, which allows diode current to be set by Pin 6. IOUT This Output provides drive current to the laser diode; (anode/positive; connect cathode to ground). Maximum drive current is dependent upon laser diode impedance and power supply input voltage. VOPT The optical monitor voltage is proportional to the optical output power of the laser diode as sensed by a backfacet photodetector over the range of 1µA to 1mA. 400 Hot Springs Road, Carson City NV 89706 • (775) 883-0820 • Fax (775) 883-0827 • www.hytek.com • 29