HY6340 Datasheet, PDF (2/2 Pages) List of Unclassifed Manufacturers – Switchable Constant Current Laser Diode Driver

HY6340
Laser Diode Driver
Input Specifications
Power Supply Input (VEE): Pins 9,10, 11, 16
Drive Enable (EN): Pin 7
Modulation (MOD): Pin 21
Ground (GND): Pins 18, 19, 20
Feedback-Optical (FB): Pin 22
Over-Temperature Alarm Input (OTI+): Pin 1
Over-Temperature Alarm Input (OTI-): Pin 5
Over-Current Alarm Input (OCI-): Pin 6
Temperature Alarm Hysteresis: Pin 4
Temperature Alarm Hysteresis: Pin 3
–9 to –15V @ 1 amp max. (1.5 amp with forced air cooling)
VEE (off, disable), Ground or Open (on, enable)
10 to 1000mA for input voltage VEE to (VEE + 3V)
(10 to 1500mA with forced air cooling)
Power supply ground
FB<MOD increases IOUT, FB>MOD decreases IOUT
VEE < FB < VEE + 5V
with VEE < OTI+ < VEE + 5V
with VEE < OTI+ < VEE + 5V
Use to increase temperature hysteresis
Use to increase temperature hysteresis
Output specifications
Laser Diode Current Drive (IOUT): Pins 12, 13, 14
Reference Output (VREF): Pin 8
Over-Temperature Alarm Output (OTA): Pin 2
Over-Current Alarm Output (OCA): Pin 17
0 to 1 amp (1.5 amp with forced air cooling)
= VEE +5V at < 100mA
VEE (Alarm condition; normally grounded)
VEE (Alarm condition; normally grounded)
Environmental conditions
Operating Temperature
Storage Temperature
–20°C to +100°C (case)
–65°C to +150°C (case)
Signal descriptions
VEE
Input power supply (–9 to –15 VDC).
GND Ground return for VEE (input power supply)
MOD
The modulation voltage programs the laser diode drive current, IOUT. When the input is at VEE the modulation cur-
rent is zero. Maximum modulation current occurs when the voltage at MOD is +5.0 V with respect to the VEE in-
put. The current is set by the voltage at the modulation input.
VREF
The Reference voltage is a precision voltage reference with an output voltage of VEE + 5VDC. The Reference volt-
age supplies a voltage for the adjustment of the current. It can also be used to power a resistive bridge input to
the over-temperature alarm, and to provide an adjustable reference voltage to the current alarm input.
EN
The Enable pin is used to enable/disable the output. When the Enable pin is connected to ground, or left open,
the output is enabled, allowing current to flow to the laser diode. When this pin is connected to VEE the laser
current is disabled.
IOUT
The Output provides drive current to the laser diode (cathode/negative; connect anode to ground).
FB
This high input impedance, voltage feedback, input is used with a photodetector to control Output Current.
OTI+ Positive over-temperature alarm input.
OTI– Negative over-temperature alarm input.
OCA Over-current alarm output. Alarm: VEE; No alarm: Ground
OCI
Over-current input. OCI controls the set point for the over-current alarm detector. VEE<VOCI< VEE +5V
OTA
Over-temperature alarm output. Alarm: VEE; No alarm: Ground
RH
Resistor connected between pins 3 and 4 to vary the temperature detector hysteresis from 1 to 10%.
400 Hot Springs Road, Carson City NV 89706 • [phone] • Fax [phone] • www.hytek.com • 31