Texas Instruments TLV1117 | Demoboard TIDA-01541

Description

The TIDA-01541 reference design reduces system cost and enables a compact design for isolated phase current and DC link voltage measurement in three-phase inverters, while achieving high bandwidth and sensing accuracy. The output of the isolated amplifiers is interfaced to the internal ADC of the MCU using a differential-to-single-ended circuit. Use of isolated amplifiers enables using SAR ADC within MCU, thereby lowering system cost without any trade-offs on the current sensing. The 8-pin package reduces board form factor. High bandwidth of the isolated amplifier enables protection of IGBTs within 3.5 µs and high-performance specifications enable high-accuracy current and voltage measurements. The DC link voltage measurement is done with a high input impedance to avoid effect of source impedance due to high-voltage potential divider to improve accuracy.

Features

• Reinforced, Isolated Inverter Suited for 400-V to 1200-V DC-Link Drives Rated up to 10 kW
• Reinforced, Isolated Amplifiers With High Bandwidth (> 200 kHz) Enable Low LatencyCurrent Sensing and Fast Overcurrent Detection (< 3 μs) to Protect Power Stage
• Reinforced, Isolated Amplifier With High Impedance Input Optimized for Precision Sensing of High-Impedance Nodes Like DC-Link Voltage,±1% Error for DC-Link Voltage Sensing Accuracy From 0-V to 1026-V DC
• Calibrated Current Measurement Error of ±0.5% Over ±50-A FSR and Across Temperature Range From –25°C to +85°C
• Reinforced, Isolated Amplifier With Low Power Consumption Allows Powering From Gate DriversBootstrap Capacitor Simple LDO
• Protection Against DC Bus Undervoltage, Overvoltage, Overload, Ground Fault, and Overtemperature

Typical applications

• AC Inverters and VF Drives, Three-Phase UPS, Solar Inverters
• Servo CNC and Robotics

More information

• Datasheet
• IC product information