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L6228Q - DMOS driver

Description

The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCD multipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip.

Features

  • Operating supply voltage from 8 to 52 V.
  • 2.8 A output peak current (1.4 Ar. m. s. ).
  • RDS(on) 0.73 Ω typ. value @ TJ = 25 °C.
  • Operating frequency up to 100 kHz.
  • Non dissipative overcurrent protection.
  • Dual independent constant tOFF PWM current controllers.
  • Fast/slow decay mode selection.
  • Fast decay quasi-synchronous rectification.
  • Decoding logic for stepper motor full and half- step drive.
  • Cross conduction protection.
  • Thermal shutdown.
  • Und.

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Full PDF Text Transcription

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L6228Q DMOS driver for bipolar stepper motor Features ■ Operating supply voltage from 8 to 52 V ■ 2.8 A output peak current (1.4 Ar.m.s.) ■ RDS(on) 0.73 Ω typ. value @ TJ = 25 °C ■ Operating frequency up to 100 kHz ■ Non dissipative overcurrent protection ■ Dual independent constant tOFF PWM current controllers ■ Fast/slow decay mode selection ■ Fast decay quasi-synchronous rectification ■ Decoding logic for stepper motor full and half- step drive ■ Cross conduction protection ■ Thermal shutdown ■ Undervoltage lockout ■ Integrated fast free wheeling diodes Applications ■ Bipolar stepper motor Figure 1.
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