LTC7001

• 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)

• Variable 72 V to 96 V voltage range, suitable for E2W/E3W applications
• ASIL-D compliant and automotive grade BMS chip
• Built-in charge, pre-charge, and discharge circuitry
• 1.8 mV total measurement error (TME) for cell voltage monitoring
• High performance cell/pack voltage and current monitoring​
• On-board isoSPI communication​
• Low Power Cell Monitoring (LPCM) capability​
• GPIO Controllable FET Monitoring​
• ADBMS6830 GPIO input ready for NTC sensors​
• Low Power MAX32690 MCU​
• UART and CAN Communication​
• SOC and SOH thru Enhanced Coulomb Counting Technique​
• E2W/E3W Basic System Behavior Modes​
• Embedded Application-ready (via CLI)​
• With GUI capable of the following measurements and fault detection:​
  • Cell Monitoring​
  • Voltage and Current Pack Monitoring​
  • Charge Current Monitoring​
  • Discharge Current Monitoring​
  • Temperature Monitoring​
  • Cell OV/UV Detection​
  • Cell/GPIO Open-wire Detection​
  • Cell Balancing​
  ​

The AD-BMSE2E3W-SL is a BMS reference design for light electric vehicles (LEVs). With a voltage range of 72 V to 96 V, this solution is suitable for electric 2-wheeler and 3-wheeler vehicles with high current capacity ranging up to 100 A. ​​

This single-board system utilizes the best-in-class ADBMS6830 cell monitoring chip that is capable of monitoring up to 2x 16-channel. This board also features battery pack monitoring using the ADBMS2950. ​The ADBMS6822 dual isoSPI transceiver provides a built-in 2-wire reversible isoSPI connection, which simplifies the communication of BMS parts in a daisy chain configuration before sending the data to SPI lines in the microcontroller. ​​

The on-board MAX32690 MCU, when loaded with the firmware, can perform BMS measurements such as cell voltage (average and filtered), and pack voltage and pack current measurement. The board also has a charge, pre-charge, and discharge mode that can be controlled by the ADBMS2950 pack monitor chip.​

The AD-BMSE2E3W-SL is designed to perform either in embedded mode or using a GUI, where it calculates the battery's State of Charge (SoC) and State of Health (SoH) through enhanced coulomb counting technique.​

APPLICATIONS

• Electric and hybrid 2-wheeler vehicles
• Electric and hybrid 3-wheeler vehicles
• Light electric vehicles

Demonstration circuit 2708A is a 135V, high side switch featuring the LTC7001. The demo board is designed to switch a 5A output load from 0V up to 135V. This board offers a low 50ns (typical) propagation delay, fast switching times (<10ns) and 100% duty cycle operation.