Pulsed/CW buck-boost laser diode driver

LDDP-20-70 is designed to supply laser diode strings of multiple single emitters in series. LDDP can supply loads from 0 .. 70 V from a DC input between 12 .. 52 V, as long as the input current does not exceed 25 A. Its unique buck/boost switching topology allows DC/DC operation with load compliance voltage even exceeding the DC input voltage: Standard diode drivers with buck converter require
a load voltage for minimum ca. 2 V below the supply input. Besides standard industrial and medical use for direct diode applications its low current ripple/noise makes it especially suitable for sensitive pumping applications. System designers can thus keep using usual low cost 24 V auxiliary supplies although more and more laser diodes exceed yet the 30 V compliance voltage level. The high speed model LDDP-20-70-HS is fast analog regulated. The up to 97 % highly efficient switching regulation provides fast pulses to 2 kHz or to 5 kHz (-3 dB) analog amplitude modulation with typ. 50 .. 65 μs rise/fall times. At lower modulation depth even faster modulation to >10 kHz is possible. The standard model provides differential signal I/Os for all digital and analog signals.