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L6228Q 数据表(PDF) 1 Page - STMicroelectronics |
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L6228Q 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 32 page  August 2010 Doc ID 14321 Rev 4 1/32 32 L6228Q DMOS driver for bipolar stepper motor Features ■ Operating supply voltage from 8 to 52 V ■ 2.8 A output peak current (1.4 A RMS) ■ 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 Description The L6228Q is a DMOS fully integrated stepper motor driver with non-dissipative overcurrent protection, realized in BCDmultipower technology, which combines isolated DMOS power transistors with CMOS and bipolar circuits on the same chip. The device includes all the circuitry needed to drive a two-phase bipolar stepper motor including: a dual DMOS full bridge, the constant off time PWM current controller that performs the chopping regulation and the phase sequence generator, that generates the stepping sequence. Available in VFQFPN32 5 mm x 5 mm package, the L6228Q features a non-dissipative overcurrent protection on the high side power MOSFETs and thermal shutdown. VFQFPN32 5 mm x 5 mm Figure 1. Block diagram GATE LOGIC STEPPING SEQUENCE GENERATION OVER CURRENT DETECTION OVER CURRENT DETECTION GATE LOGIC VCP VBOOT EN CONTROL CW/CCW VREFA VBOOT 5V 10V VSA VSB OUT1A OUT2A OUT1B OUT2B SENSEA CHARGE PUMP VOLTAGE REGULATOR ONE SHOT MONOSTABLE MASKING TIME THERMAL PROTECTION VBOOT VBOOT OCDB OCDA 10V 10V BRIDGE A SENSE COMPARATOR BRIDGE B D01IN1225 RCA + - SENSEB VREFB RCB HALF/FULL CLOCK RESET PWM www.st.com |
类似零件编号 - L6228Q |
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类似说明 - L6228Q |
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