Overview
The ALM2403-Q1, produced by Texas Instruments, is a dual-channel, high-voltage, power operational amplifier designed specifically for resolver applications in automotive and industrial environments. This device integrates two power operational amplifiers, filtering, and a differential output architecture on a single chip, making it an all-in-one resolver driving solution. It is AEC-Q100 qualified, ensuring it meets stringent automotive standards, and is functional-safety capable, enhancing reliability and performance in critical applications.
Key Specifications
| Parameters | Specifications |
|---|---|
| Input Supply Voltage | Single power rail from 5 VDC to 24 VDC |
| Operating Temperature | –40°C to 125°C |
| Resolver Excitation Frequency | 400 Hz–40 kHz typical, fexcitation = 10 kHz nominal |
| Sinusoidal PWM Input | fsw_320kHz = 320 kHz, 3.3 Vp-p PWM sinewave generator |
| Power Amplifier (PA) | Single chip, dual integrated op amps, 50 V/μs in slew rate |
| PWM Filters | Multiple Feedback (MFB), second-order LPF combined with PAs |
| Gain-Bandwidth Product (GBW) | 21 MHz |
| PA Output Signal Amplitude | Differential sinewave output at 7 VRMS or 10 Vp-p |
| PA Output Drive Current | Differential drive with output current ±200 mA p-p or higher |
| Low Voltage Offset | ±6 mV typical, ±25 mV maximum at Tambient = 25°C |
| Package | 14-pin HTSSOP (PWP), 5.00 mm × 4.40 mm in size |
Key Features
- Combines filter and differential output architecture for driving resolver
- Cascaded output to input differential op amp drive
- Single-chip, all-in-one resolver driving approach
- Minimum part count and small PCB footprint
- Low cost and improved reliability
- Reduces design complexity and improves performance
- Minimizes DC offset voltage across the excitation windings of the resolver
- Direct or capacitive couplings with resolver load
- Features a Pulse Width Modulation (PWM) input as a sinusoidal signal generator (Optional DAC as input)
- Functional-safety capable with built-in ESD, thermal, and overvoltage protection
- High output current drive: 500 mA, peak (per channel)
- Shutdown pin for low IQ applications
Applications
- AC Differential Rotary Transformer Driver
- Automotive/Industrial Servo Driver
- Hybrid-Electric Vehicle (HEV/EV) – Inverter and Motor Control
- E-bike
- Traction inverters for Hybrid-Electric Vehicles (HEV), Electric Vehicles (EV)
- Electric power steering, motor drives, and servomechanisms in automotive and industrial applications
Q & A
- What is the ALM2403-Q1 used for?
The ALM2403-Q1 is used as a resolver driver in automotive and industrial applications, providing a single-chip solution for driving resolvers. - What are the key features of the ALM2403-Q1?
Key features include a single-chip, all-in-one resolver driving approach, cascaded output to input differential op amp drive, and built-in protection mechanisms like ESD, thermal, and overvoltage protection. - What is the operating temperature range of the ALM2403-Q1?
The operating temperature range is –40°C to 125°C. - What is the input supply voltage range for the ALM2403-Q1?
The input supply voltage range is from 5 VDC to 24 VDC. - What is the gain-bandwidth product of the ALM2403-Q1?
The gain-bandwidth product is 21 MHz. - What kind of protection does the ALM2403-Q1 offer?
The ALM2403-Q1 offers built-in ESD, thermal, overvoltage, and short circuit current protection. - What is the typical output current drive of the ALM2403-Q1?
The typical output current drive is ±200 mA p-p or higher. - What package type is the ALM2403-Q1 available in?
The ALM2403-Q1 is available in a 14-pin HTSSOP (PWP) package. - Is the ALM2403-Q1 AEC-Q100 qualified?
Yes, the ALM2403-Q1 is AEC-Q100 qualified for automotive applications. - What are some common applications of the ALM2403-Q1?
Common applications include AC differential rotary transformer drivers, automotive/industrial servo drivers, and hybrid-electric vehicle inverter and motor control.
