New Dual High-Output Amplifier Simplifies Circuitry for Driving Inductive and Low-Ohmic Loads

STMicroelectronics has announced the new dual high-output amplifier TSB582 that simplifies circuitry for driving inductive and low-ohmic loads like motors, valves, and rotary resolvers in industrial applications and automotive systems such as steer-by-wire and auto-parking. Available in industrial and automotive-grade versions, this amplifier comes with an internal short circuit and over-temperature protection, has rail-to-rail outputs, and operates up to 3.1MHz gain-bandwidth (GBW). Both the industrial- and automotive-grade versions are qualified over a temperature range of -40°C to 125°C, are EMI hardened, and provide ESD robustness up to 4kV HBM.

This TSB582 amplifier operates from 4V-36V supplies and contains two operational amplifiers (op amps), each capable of sinking/sourcing up to 200mA. This enables direct connection of a load in bridge-tied mode, allowing one TSB582 to replace two single-channel power op amps or high-current drivers built from discrete components. While integrating two op amps into one package, it is able to save up to 50% of board space and lowers the bill of materials.

Features

• Wide supply voltage: 4 V - 36 V

• High output current 200 mA

• Rail-to-rail output, low rail input

• Gain bandwidth product: 3.1 MHz

• High slew rate: 2 V/µs

• Internal thermal shutdown & output current limiter

• Enhanced RF noise immunity

• High tolerance to ESD: 4 kV HBM

• Extended temperature range: -40 °C to 125 °C

• Low noise 45 nV/√Hz @ 1 kHz

• Icc (typ.) = 2.5 mA at 36 V or 2.3 mA

• Unity gain stable

• Low offset 2.4 mV max. (25 °C) / 3 mV max. (full temperature range)

• Low input bias current

Applications

• Servo driver

• Valve driver

• DC power supply, AC source

• Portable instrumentation

• Line drivers

• Motor control

• Angle resolver

• LED driver

• Industrial process control

Availability and Pricing

There are two package options, each with low thermal resistance: an SO8 with exposed thermal pad and a 3mm x 3mm DFN8 with exposed pad and wettable flanks. This amplifier is now available and the unit price is $1.57 for industrial-grade and $1.80 for automotive-qualified versions.