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特性
- Four Serial Controlled 36V Half Bridges
- 0.55A DC (TA = 25°C) and 1A Full-Scale Current Capability
- Low RON 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
产品详情和应用
The MAX22216/MAX22217 integrate four programmable 36V half-bridges. It is primarily intended to drive inductive loads such as on-off solenoid valves, DC motors, proportional valves, bi-stable valves, relays, etc. The MAX22216 is capable of up to 3.2AFS per half-bridge, whereas the MAX22217 is capable of up to 1AFS per half-bridge. The MAX22216/MAX22217 operate from -40°C to +125°C ambient temperature.
The MAX22216/MAX22217 half-bridges support two different use cases. In the first case, configuration settings can be entered through a serial peripheral interface (SPI) and can be changed at any time. Alternatively, settings can be stored in one-time programmable (OTP) registers, which are loaded at power-up. This enables stand-alone operations. Registers are user-programmable. The OTP writing procedure must be executed in a factory under well-controlled temperature and voltage conditions.
High-side/low-side single-ended drive operations and bridge-tied load (BTL) configurations are supported. Channel parallelization is also supported. Voltage control, current control, and mixed schemes are supported.
In voltage drive regulation mode (VDR mode), the half-bridge output voltage is controlled. Supply variations are internally compensated.
In current drive regulation mode (CDR mode), the half-bridge output current is controlled. The current is internally sensed and fed back to the controller for accurate closed-loop regulation. Proportional and integral gains can be configured to optimize steady-state errors and dynamic performance.
The MAX22216/MAX22217 integrate functions aimed to optimize solenoid and DC motor drive control. These include a two-level sequencer for power saving, drive signal ramp control (RAMP) for noise reduction, a dither function (DITH) to counteract the effects of static friction and hysteresis, a fast demagnetization feature (DC_H2L) to shorten o
