smart motor driver family · · 2009-12-23driver power stage input power behavioural commands...
TRANSCRIPT
Smart Motor Driver FamilySmart Motor Driver Family
Motor Control System PartitioningMotor Control System Partitioning
sensorssensors
DriverPower Stage
Input Power
BehaviouralCommands
Device incorporating all necessary logic and power
circuits to drive a motor
Power circuits feeding the Motor, including protection
Logic and analog circuit generates switching pattern to drive the power switches
Voltage and current level shifters
solid state switches
Controller GateDrivers
PowerSwitchArray
powerSPIN: A Motor Driver Platform ready for Mass Customization
powerSPIN: A Motor Driver PlatformPlatform ready for Mass Customization
Power MOS
AnalogControl
CoreDC MOTORSDC MOTORS
STEPPERSTEPPER
BRUSHLESSBRUSHLESS
Power MOS
L620X for Lower Current L620X for Lower Current (5.6Apeak, 2.8Arms)(5.6Apeak, 2.8Arms)
L622X for Lower Current L622X for Lower Current (2.8Apeak, 1.4Arms)(2.8Apeak, 1.4Arms)
L6225L6225
powerSPIN family portraitpowerSPIN family portrait
L6226L6226
L6227L6227
L6228L6228
L6229L6229
L6205L6205
L6206L6206
L6207L6207
L6208L6208
L6235L62353ph Bridge
Dual H-Bridge
Basic Power StageFixed Over CurrentSmallest PackageFor Dual DC or Stepper
Enhanced Power StageSettable Over CurrentDiagnostic OutputFor Dual DC or Stepper
Power Stage with PWMTwin Current ControlFor Dual DC or Stepper
Stepper Motor DriverSingle ChipFor bipolar Stepper
Brushless Motor DriverHall sensors decoding logicPWM Current ControlTacho output
powerSPIN family common featurespowerSPIN family common features• BCDIIIs, 1um, 60 V Mixed signal power technology• Operating Supply Voltage from 8 to 52V• PowerMOS ouput stage:
• typical Rds(on) = 0.3ohm or 0.73ohm @ Tj = 25 °C• Intrinsic Fast Free Wheeling Diodes
• Two product classes covering different current ratings:• L620X and L6235, 5.6Apeak and 2.8Arms• L622X, 2.8Apeak and 1.4Arms• Paralleled Operation doubles peak and rms ratings!
• Extensive Protection Schemes:• Non-Dissipative High Side Current Sensing for Over Current
Protection• Cross Conduction Protection• Thermal Protection• Under Voltage Lock Out
• PowerSO, SO and DIP package options:• fit different power ratings
…a basic yet comprehensive twin Power Bridge Solution
L6205 and L6225
…a basic yet comprehensive twin Power Bridge Solution
L6205 and L6225- Fixed (5.6A/2.8A*) Over Current
trip point- Smallest pin count/package size
- PowerSO20/SO20/DIP20- aimed at dual DC/Bipolar Stepper
…with an external OCD setting, here’sL6206 and L6226
…with an external OCD setting, here’sL6206 and L6226
Drives:- Dual DC, or - Bipolar Stepper, or- High Current DC
Diagnostic Output
Externally Adjustable Over Current trip point
Zero losses High Side Current sensingZero losses High Side Current sensing
DIAG
ENABLE
Vdd
To uC
R
C
Ron
1.27V
Vboot
10V
Vref
Vs
OUT
Sense
Current Sensing Though few "Cells" of the High Side PowerMOS
Diag Feedback through an Oped Drain Output
(External in the L6207) Connection to the ENABLE pin
…flexible off time management…flexible off time management
Isc
Load Current (through High Side Drivers)
1.27V
DIAGRCRonC
ON ONOFF
DIAG
1.27V
ENABLE
Vdd
To uC
L6207
R
C
Ron
Define your own OFF time, for safe operation.
…then add a twin PWM control to getL6207 and L6227
…then add a twin PWM control to getL6207 and L6227
- Dual constant Toff PMW control channel
- aimed at dual DC/Bipolar Stepper
Constant Toff PWM current control schemeConstant Toff PWM current control scheme
DRIVERS+
DEAD TIME
SQ
R
DRIVERS+
DEAD TIME
2H 1H
2L 1L
OUT2A(or B)
SENSEA(or B)
RSENSE
D02IN1352
RCA(or B)
RC
VREFA(or B)
IOUT
OUT1A(or B)
+
+
-
-
1µs
5mA
BLANKER
SENSECOMPARATOR
COMPARATOROUTPUT
MONOSTABLERESET
2.5V
5V
FROM THELOW-SIDE
GATE DRIVERS
LOADA(or B)
BLANKING TIMEMONOSTABLE
VSA (or B)
TO GATE LOGIC
(0) (1)
OFFB C D DA
TON TOFF
B C
ON
2.5V
0Slow Decay
1µs tBLANK
TRCRISE TRCRISE
0.69RC
SYNCHRONOUS RECTIFICATION
1µs tBLANK
5V
VRC
VSENSE
VREF
IOUT
VREFRSENSE
D02IN1351
Ever needed a single package answer to Stepper Motor?
L6208 and L6228
Ever needed a single package answer to Stepper Motor?
L6208 and L6228- Integrated translator- Integrated PWM current
control- Simple Interface to host- aimed at Bipolar Stepper
A real system implementation with L6208/L6228
A real system implementation with L6208/L6228
- External part count reduced to a minimum
- Clean and elegant truly cost effective solution
Integrated hall sensor decoding logic
60 or 120 degreesIntegrated PWM current controlDiagnostic OutputSimple Interface to hostTacho Output fro Speed control
Looking to a Fully Integrated 3-Phase Brushless Motor Driver solution?
L6235 and L6229!
Current Ratings vs Package and configuration
Current Ratings vs Package and configuration
Assumptions• Tj=125C• Vs=24V• Sinchronous Rectification• SO Pdmax=1W• DIP Pdmax=2W• PowerSO Pdmax=3.5W
2.4A
1.2A1.6A
0.8A
0.6A
1.2A0.9A
1.8A
0.4A0.9A
0.6A
1.3APowerSO
Dual In Line
SOL622x Dual
L622x Parallel
L620x Dual
L620x Parallel
practiSPINTM:practiSPINTM:
A comprehensive set of tools:- a set of Demo Boards (EVAL620X, x = 5, 6, 7, 8 and EVAL6235)
-a Windows based User Interface- an ST7 Based Demo-to-PC interface board
- establish plug –and –play connection to the motor for a rapid product evaluation - first cut thermal analysis
Enabling user to: