ADCMP393

• Companion module for Active Learning labs on buck and boost power converters
• Illustrates important concepts related to buck and boost converters:
  • Continuous vs. Discontinuous Conduction Modes
  • Open loop operation
  • Voltage mode control
  • Current mode control
• Independently adjustable parameters: frequency, duty cycle, voltage/current mode
• Onboard current sense amplifiers and adjustable load minimize equipment requirements.

The ADALM-SR1 (Analog Devices Active Learning Module, Switching Regulator) board is a companion module for several switching regulator exercises covering buck and boost regulators:

• Boost and Buck converter elements and open-loop operation
• Buck Converters: closed loop operation
• Boost Converters: closed loop operation

The circuits required for these exercises exceed the complexity that can be constructed on a breadboard, so the ADALM-SR1 was designed as a flexible platform for experimenting with power electronics. Onboard current sense amplifiers, adjustable electronic load, and feedback signal injection circuitry eliminate the need for expensive equipment — the only additional equipment required is:

• 5V USB wall adapter
• Basic adjustable power supply for input power (0-12V, 2A)
• Multimeter
• ADALM2000 or basic oscilloscope (2 channels with trigger, >10MHz bandwidth)

• Positive and negative voltage monitoring
• LED indicated voltage output status
• Test points for easy probing

Customers of ADCMP391/ADCMP392/ADCMP393/ADCMP394/ADCMP395 comparators may evaluate the performance of these devices using ADCMP396, which has near identical electrical performance to this part and contains a superset of functions featured by this device family.

The EVAL-ADCMP396EBZ features accurate positive and negative voltage monitoring with 0.9% accuracy. The evaluation board uses LEDs to indicate an overvoltage or undervoltage event in both positive and negative voltage being monitored.

The ADCMP396 is a quad rail-to-rail input low power comparator suitable for general-purpose applications. The ADCMP396 consumes only 41.61 μA of supply current making it ideal for battery-powered systems.

The ADCMP396 has a common-mode input range of 200 mV beyond rails, a typical offset voltage of 1 mV across the full common-mode range, and an undervoltage lockout (UVLO) monitor. In addition, the design of the comparator allows a defined output state upon power-up, it generates a logic low output while the supply is still below the UVLO threshold.

The ADCMP396 incorporates a 1 V ± 0.9% buffered reference voltage over line, load, and temperature.