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

20 July 2022 - 0 Comments

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.