Laser diode driver 6130.mp4

The PCO-6130 is based on a hysteretic, average current, switch-mode
regulator. This type of regulator is a variable frequency, variable pulse
width design which maintains current in an energy storage inductor
between a minimum and maximum level. The ripple is limited to the
minimum and maximum current determined by the hysteretic controller. The
controller turns on to charge the energy storage inductor when the current
drops to the lower limit and turns off when the current reaches the upper
limit and repeats this operation as necessary to maintain the proper current.
The time for these operations will vary dependent on the load voltage and
the input voltage, therefore the pulse width of the controller will change as
necessary to charge the inductor and the period will change dependent on
the rate at which the inductor discharges.
This architecture provides a high performance driver in a small form factor,
with high operating efficiency and low stored energy. At 125A output
current, the stored energy in the driver is approximately 7 Joules,
dramatically lower than the stored energy in comparable linear current
sources.

[evgenydedin]

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