New resolver-to-digital converter enables up to a 50 percent reduction in board space and a lower bill-of-materials cost in automotive and industrial applications
Texas Instruments has introduced the industry’s first resolver sensor interface with integrated power supply, exciter amplifier and functional safety features.The new device is capable of simultaneously exciting the resolver sensor coil and calculating the angle and velocity of a rotating motor shaft without the external components required by competitive solutions.The PGA411-Q1 resolver-to-digital converter’s architecture helps enable designers to increase system accuracy and stability for end equipment like hybrid electric vehicle/electric vehicle (HEV/EV) traction inverters, electric power steering, integrated start-stop generators, industrial alternating current (AC) servo motor control and robotic arm control.For more information, see www.ti.com/pga411q1-pr.
Key features and benefits of the new PGA411-Q1:
- High level of integration: The PGA411-Q1reduces bill-of-materials (BOM) cost and cuts printed circuit board (PCB) space as much as 50 percent by eliminating at least 10 external and passive components. Its integrated exciter amplifier, high-voltage boost power supply with short protection, and programmable fault detection thresholds and filters allow the PGA411-Q1 to support a wide range of 4-Vrms and 7-Vrms resolver sensors and often eliminate the need for external circuitry.
- Advancedfunctional safety features:The integrated built-in self-test (BIST)performs an analog and logic component self-check automatically upon startup, enabling enhanced latent fault coverage. The self-test and built-in diagnostics largely eliminate the need for external protection and enable engineers to develop systems that meet Automotive Safety Integrity Level (ASIL) D functional safety certification for International Organization for Standardization (ISO) 26262, unlike competitive solutions.
- Architected for system stability and accuracy:The device architecture provides over voltage, under voltage and thermal protections, including separation of the high-current and high-voltage blocks from other parts of the device, like the analog front end (AFE), which are highly susceptible to damage. Additionally, the AFE’s integrated comparators remove the need for an external analog-to-digital converter, which helps enable stability by reducing the effects of quantization noise on the input signals from the sensor.
- Eliminate engineering hours: Built-in programmable features such as an internal clock, AFE, and increased diagnostics and protection enable engineers to scale the device to fit a range of resolver sensors and system needs. Designers can easily change internal parameters and move to a new platform design withoutthe extensive engineering effort typically required to redesign hardware or debug a new system.
Design for functional safety system redundancy
Developers can pair the PGA411-Q1 resolver-to-digital converter with TI’s C2000™ F28379 microcontrollers (MCUs) and Design DRIVE Position Manager technology for functional safety redundancy. The Design DRIVE Position Manager technology gives engineers access to the base functionality needed to interface to resolver sensors, saving time in development, support and testing in industrial servo and AC inverter drives.
The PGA411-Q1 joins TI’s growing portfolio of sensing innovations that provide the performance, accuracy and power consumption required in sensing designs.
Tools and support to speed design
Engineers can quickly and easily evaluate the performance of the PGA411-Q1 resolver-to-digital converter with an evaluation module (EVM). ThePGA411-Q1EVM is available today for US$149 from the TI store and authorized distributors. Designers can also evaluate the suitability of this device for their systems with a TI Designs reference design: Automotive Resolver-to-Digital Converter Reference Design for Safety Application.
Package, availability and pricing
The PGA411-Q1is now available in a 64-pin thermally enhanced thin quad flat pack (HTQFP)PowerPAD™ package starting at US$12.96in 1,000-unit quantities.
Learn more about TI’s resolver sensor interface:
- Download the PGA411-Q1 data sheet.
- Read the Analog Wireblog post,“How position sensing lifts designs to new heights.”
- Learn more about automotive design in TI’s Analog Applications Journal article, “Design considerations for resolver-to-digital converters in electric vehicles.”
- Search for solutions and engage with fellow engineers and TI experts in the TI E2E™ Community Automotive forum.
- Learn more about resolver sensor interfaces in the application note,“Safety Manual for PGA411-Q1 Resolver Sensor Interface.”
