Infineon BTS721L1 Quad High Side Power Switch 16V SOIC-20

The Infineon BTS721L1 Quad High Side Power Switch is a four channel high side switch with a 5 to 34 V input voltage range, supplied in an SOIC-20 package.

This smart power switch is designed for demanding automotive and industrial applications. It uses an N channel vertical power FET with charge pump, monolithically integrated in Smart SIPMOS technology, and features a ground referenced CMOS compatible input for direct connection to microcontrollers.

Key Features

• Four channel high side power switch
• Open drain diagnostic output with open load detection in ON-state
• Ground referenced CMOS compatible input
• Electrostatic discharge (ESD) protection integrated
• Typical on-state resistance of 85 mΩ at Tj = 25°C
• Nominal load current of 2.9 A typical at Tj = 25°C and Vbb = 12 V
• Current limit of 14 A per channel
• Operating temperature range of -40°C to +150°C
• AEC-Q100 qualified for automotive applications

Protection Functions

The switch includes overload protection, current limitation and short-circuit protection, together with thermal shutdown, overvoltage protection including load dump, and fast demagnetisation of inductive loads. Reverse battery protection, loss of ground and loss of Vbb protection, and undervoltage and overvoltage shutdown with auto-restart and hysteresis are also provided.

Applications

The device is a suitable replacement for electromechanical relays and discrete circuits, offering diagnostic feedback for 12 V and 24 V DC grounded loads. It is suitable for resistive and inductive loads and supports microcontroller-controlled power switching.