Oct 092010

The FlexMod P3 driver is an advanced high speed, high current capability, linear current regulated
diode driver with a very small footprint. It is designed for flexible industrial, experimental, and custom optical applications.

The FlexMod P3 driver , and is also fit for driving current-regulated loads such as high-power
LEDs and small current controlled heating and cooling devices. The FlexMod driver is capable of driving diodes from 100mA to 4A with a modulation bandwidth of DC-160kHz and with no overshoot.

• Power input: 5-24VDC
• Analog Input: 0-5.0V, clamped for protection.
• TTL input: 0-5V Off-On
• Gain setting: 25 turn potentiometer 0-4A output.
• Bias setting: 25 turn potentiometer range 0-1A output
• Output loop circuit sensing
• Interlock loop
• Positive regulation (high side)
• Input ESD protection
• Output ESD protection (of the driver)
• Soft-start delay
• Dimensions: 1.25”x0.87” (32x22mm)
Description of Operation:
The FlexMod P3 can be considered a sophisticated voltage to current converter with added diode
protection and safety features. It can accept input power in the range of VDiode + 1.5V up to 24V and the output voltage will match the load requirement.
Typically, a laser diode has a lasing threshold current above which its light output increases rapidly. In order to keep the diode in a low impedance and ready state, a below-threshold bias
current is passed through the diode continuously, even with 0 modulation input. This current is set with the 0-bias potentiometer. Modulation is input to the M+ connection on the PCB. Driver output current will rise linearly with respect to Parameter Specification Unit.

FlexMod P3 driver The FlexMod P3 driver

  • Input Voltage (Vdd) 5 – 24 V
  • Max Output (Diode) Voltage Vdd – 1.5 V
  • Output Current 0.01 – 4.0 A
  • Bias Current 0 – 1000 mA
  • Regulation Ripple (1Hz -100kHz) < 1.0 %
  • Input Impedance 99 k?
  • Maximum diode lead loop length 3 ft
  • Maximum continuous power dissipation 25 W

Pin Description:

M+ Modulation input connection: 0-5V
G Power ground and modulation ground connection
V+ Power input connection: 5-24V
- Output return (Gnd) (LDK)
+ Positive current output (LDA)
Int Interlock connection; connect to V+ via interlock loop
Mod+ Gain 0 Bias
Gnd -Out (LDK)
V+ Balance +Out (LDA) Interlock
Caution: Discharge the output contacts after turning the driver off
before connecting the load.
Caution: Static sensitive components. Ground yourself and your
soldering workstation while handling.
Caution: Sensitive elevated components. Do not twist or excessively
bend or internal lead disconnection may result.

Disabling Soft Startup Safety Delay:

The 7 second startup delay can be disabled by
applying a solder bead jumper between the
rightmost pads of the 5-pad series at the
bottom left of the top side of the driver.

FlexMod P3 driver size The FlexMod P3 driver

dp seal trans 16x16 The FlexMod P3 driverCopyright secured by Digiprove © 2010 WagnerTech LLC

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