Analog Devices Inc. MAX22217 Solenoid Drivers

Analog Devices Inc. MAX22217 Solenoid Drivers are intended to drive inductive loads such as on-off solenoid valves, DC motors, proportional valves, bi-stable valves, and relays. These drivers are integrated with four programmable 36V half-bridges. The MAX22217 solenoid drivers operate from -40°C to 125°C ambient temperature range. These drivers integrate functions aimed at optimizing solenoid and DC motor drive control. The MAX22217 features protection circuits, including Over-current Protection (OCP), Overtemperature Protection (OTP), and Undervoltage Lockout (UVLO). These drivers are offered in TQFN32 5mm x 5mm packages. The MAX22217 drivers are ideal for solenoid on-off valves and relays, DC motors, proportional valves, bi-stable latching solenoid valves, digital output interface, and electromechanical motor brakes.

Features

Four serial controlled 36V half-bridges:
- 0.55A DC (T_A = 25°C) and 1A full-scale current capability
Low R_ON for high-efficiency
High flexibility:
- Independent channel setting
- High-side/low-side/bridge-tied load configuration/parallel mode supported
Advanced control methods:
- Voltage/current drive regulation
- Two levels sequencer for power-saving
- DC-motor drive with current limiter
- Dithering function
- Ramp up/down control
- Demagnetization voltage control
- Integrated current sense

Diagnostic functions:
- Reaction and travel time measurement
- Detection of plunger movements
- Open-load detection
- Inductance measurement
- Digital current sense monitor
Full set of protections:
- Overcurrent protection
- Thermal protections
- Undervoltage lockout