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STMicroelectronics Electronic Components Datasheet

L6208PD Datasheet

FULLY INTEGRATED STEPPER MOTOR DRIVER

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L6208PD pdf
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February 2014
This is information on a product in full production.
L6208
DMOS driver for bipolar stepper motor
Datasheet - production data
Features
Operating supply voltage from 8 to 52 V
5.6 A output peak current (2.8 A RMS)
RDS(ON) 0.3 typ. value at 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 freewheeling diodes
Applications
Bipolar stepper motor
Description
The L6208 device is a DMOS fully integrated
stepper motor driver with non-dissipative
overcurrent protection, realized in BCD
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 PowerDIP24 (20 + 2 + 2),
PowerSO36 and SO24 (20 + 2 + 2) packages, the
L6208 device features a non-dissipative
overcurrent protection on the high-side Power
MOSFETs and thermal shutdown.
DocID7514 Rev 2
1/35
www.st.com


STMicroelectronics Electronic Components Datasheet

L6208PD Datasheet

FULLY INTEGRATED STEPPER MOTOR DRIVER

No Preview Available !

L6208PD pdf
Contents
Contents
L6208
1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Circuit description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.1 Power stages and charge pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.2 Logic inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
6 PWM current control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
7 Decay modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.1 Stepping sequence generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.2 Half step mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
7.3 Normal drive mode (full step two phase on) . . . . . . . . . . . . . . . . . . . . . . . 19
7.4 Wave drive mode (full step one phase on) . . . . . . . . . . . . . . . . . . . . . . . . 19
7.5 Non-dissipative overcurrent protection . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.6 Thermal protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
8 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
8.1 Output current capability and IC power dissipation . . . . . . . . . . . . . . . . . 25
8.2 Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
9 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
2/35 DocID7514 Rev 2


Part Number L6208PD
Description FULLY INTEGRATED STEPPER MOTOR DRIVER
Maker STMicroelectronics
Total Page 30 Pages
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