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L6228Q Dataheets PDF



Part Number L6228Q
Manufacturers STMicroelectronics
Logo STMicroelectronics
Description DMOS driver
Datasheet L6228Q DatasheetL6228Q Datasheet (PDF)

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 shutdo.

  L6228Q   L6228Q


Document
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. Block diagram Datasheet − production data VFQFPN32 5 mm x 5 mm 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. 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. VBOOT VCP EN CONTROL HALF/FULL CLOCK RESET CW/CCW VBOOT CHARGE PUMP THERMAL PROTECTION OCDA OCDB STEPPING SEQUENCE GENERATION VOLTAGE REGULATOR 10V 5V VBOOT VBOOT VSA OVER CURRENT DETECTION 10V GATE LOGIC ONE SHOT MONOSTABLE OVER CURRENT DETECTION GATE LOGIC OUT1A OUT2A 10V PWM MASKING TIME + SENSE - COMPARATOR BRIDGE A BRIDGE B D01IN1225 SENSEA VREFA RCA VSB OUT1B OUT2B SENSEB VREFB RCB January 2013 This is information on a product in full production. Doc ID 14321 Rev 5 1/32 www.st.com 32 Contents Contents L6228Q 1 Electrical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.3 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.1 Power stages and charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.2 Logic inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 4.3 PWM current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 4.4 Decay modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 4.5 Stepping sequence generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.6 Half-step mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 4.7 Normal drive mode (full-step two-phase-on) . . . . . . . . . . . . . . . . . . . . . . 18 4.8 Wave drive mode (full-step one-phase-on) . . . . . . . . . . . . . . . . . . . . . . . 18 4.9 Non-dissipative overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 4.10 Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 6 Output current capability and IC power dissipation . . . . . . . . . . . . . . 25 7 Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 8 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 9 Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 2/32 Doc ID 14321 Rev 5 L6228Q 1 Electrical data 1.1 Absolute maximum ratings Table 1. Absolute maximum ratings Symbol Parameter Parameter VS Supply voltage Differential voltage between VOD VSA, OUT1A, OUT2A, SENSEA and VSB, OUT1B, OUT2B, SENSEB VBOOT Bootstrap peak voltage VIN,VEN Input and enable voltage range VREFA, VREFB Voltage range at pins VREFA and VREFB VRCA, VRCB Voltage range at pins RCA and RCB VSENSEA, VSENSEB Voltage range at pins SENSEA and SENSEB IS(peak) Pulsed supply current (for each VS pin), internally limited by the overcurrent protection VSA = VSB = VS VSA = VSB = VS =.


CL325 L6228Q MS35207


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