ELM185xB Laser Diode Driver
■Notice
1. Safety standard
For different applications of laser diode, it is sometimes required that the application should obey the safety
standard which is ruled by the law. Please make complete confirmation about which safety or law should be
obeyed while designing the circuit. ELM185xB drives laser diode by the conditions which is set by external
circuit; please confirm the actual output of light by instruments such as light power meter.
2. Laser diode damaged caused by surge voltage
Laser diode can be easily damaged by static or surge voltage when the power is turned on/off because of its low
surge resistance. ELM185xB includes Zener for absorption of surge; for best protection, ELM recommends
connecting ELM185xB and laser diode in the shortest distance.
connection in shortest distance
LD
K
A
6
5
4
KLD
VCC
ILM
ELM185xB
AMD
GND
CMP
1
2
3
■Applicable laser diode modules
Type 1
Type 2
Type 3
1 : LD cathode
1 : LD anode
1 : LD anode
2 : LD anode, MD cathode
3 : MD anode
2 : LD cathode, MDcathode
3 : MD anode
2 : LD cathode, MD anode
3 : MD cathode
It is possible to connect separate LD and MD to ELM185xB.
When connecting different LDMs other than these 3 types, additional parts are required.
10 - 9
ELM-TECH [ ELM Technology Corporation ]
