5250 SPT-IC Overview Features Single phase driver stepper motor O

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5250 SPT-IC Overview Features Single phase driver stepper motor O

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2.5-A High Performance Smart Power Stepper-Motor Driver with Diagnostic Interface
5250
SPT-IC Overview Features Single phase driver stepper motor ON-resistance (typical Wide supply range Wide current range Fast nominal/actual comparator micro stepper mode Wide temperature range Short circuit protection Under voltage shutdown Overtemperature shutdown Serial diagnostic interface Fast freewheeling diodes TTL-compatible inputs
P-SIP-15-1
Type 5250 Description
Ordering Code Q67000-A9103
Package P-SIP-15-1
5250 monolithic Smart Power technology controlling regulating motor current phase bipolar stepping motor. There other applications driving motors inductive loads that operated constant current. device TTL-compatible logic inputs, includes H-bridge with integrated, fast free-wheeling diodes plus dynamic limiting motor current chopper mode. nominal current continuously control voltage. Microstep mode produced applying sinusoidal control voltage. 5250s, with minimum external circuitry single supply voltage, form complete system that driven direct two-phase, bipolar stepping motors with output current phase. outputs internally protected against shorted ground, supply voltage shorted load. output stages also disabled undervoltage overtemperature. fault functions detected internal diagnostics, which read serially.
Semiconductor Group 1998-02-01
5250
DIAG Sense Sense
AEP01471
Figure
Configuration (top view)
Semiconductor Group
1998-02-01
5250
Definitions Functions Symbol DIAG Function Open-drain diagnostics output Input determining source/sink outputs when Enable Low, this serves clock input reading diagnostics Input activating turning device (all output transistors turned off); Enable High output active, Enable diagnostics Supply voltage Power output with integrated free-wheeling diodes Actual-current output: shared, open-source output sink transistors Ground Power output with integrated free-wheeling diodes Determines turning back sink transistor internally driven, external element external trigger signal Input reference potential (nominal current) nominal/ actual comparator Input actual current nominal/actual comparator
Sense
Semiconductor Group
1998-02-01
Cooling Bandgap/Bias Charge Pump
VCC1 VCC2 Bias
Figure
Semiconductor Group
Driver Driver Functional Logic High
Undervoltage
Block Diagram
-1.5
High
Overtemperature
Enable
Phase
-1.5
Overload
H-Bridge Output Stage
Diagn
Diagnostics Logic
Logic
Off/ Charge
Chop Logic
Nom/Act Comp RC/Sync
Nominal
Driver
Driver
Sense
Sense
AEB01468
5250
1998-02-01
Actual
5250
Application 5250 drivers required operate bipolar stepping motor. implement full-step operation, squarewave voltage with required stepping frequency applied phase input upper driver, same squarewave voltage, offset phase 90°el, phase input lower driver. Motor-current limiting produced signal that applied both nominal-current inputs. microstep operation nominal current tracks sinusoidally synchronously with required stepping frequency. This produces sinusoidal current motor windings ensure very smooth running high stepping frequency. instantaneous nominal value (sine cosine) held second driver, possible certain angle rotation while motor stationary. motor current produced this depends nominal voltage sense resistance (normally i.e.
actual voltage should thoroughly filtered precise current regulation, especially microstep operation. actual input accessible, element necessary between Sense output Actual input. resistance should correspond internal resistance nominal-current input-voltage source prevent additional voltage offset nominal/actual comparator.
Circuit Description Outputs Outputs push-pull output stages. Four integrated free-wheeling diodes referred ground supply voltage protect integrated circuit against reverse voltages from inductive load. Enable Phase Outputs disabled voltage VInh Enable pin. sink transistors enabled VInh voltage Phase input determines phase output current. Output acts sink source output this reversed: sink source sink transistors chopped. signal Enable plus clock signal Phase enable readout multiplexer.
Semiconductor Group
1998-02-01
5250
Nominal-Current Input peak current motor winding defined voltage Nominal input. This compared fast comparator voltage drop actual-current sensor. nominal current exceeded, sink transistors outputs turned logic. RC/Sync Input outputs turned signal applied input. Synchronization possible signal chopper mode with external combination. Chopper Mode After supply voltage applied, capacitor charged with constant current regulator limits maximum voltage capacitor result rising current motor winding, voltage actual sensor increases. Once value defined nominal-current input exceeded, fast comparator resets flipflop. Thus sink transistors turned logic. charge current turned parallel discharges internal logic designed that capacitor always charged before discharge operation triggered. This guarantees constant charge time, even very small coil currents (see Figure Sync Operation sync signal with level applied input, negative edge will flipflop combined Schmitt trigger monoflop voltage current sensor smaller than nominal value nominal-current input. chopper mode, appropriate output transistors conduct. They again turned resetting flipflop when voltage current sensor becomes greater than nominal value (see Figure Output-Stage Control This part circuit handles turn-off output stages when output shorted ground. There separate current monitoring this purpose source transistors. temperature output stages also monitored. this exceeds output stages turned off, then turned again when temperature drops. Undervoltage also causes turn-off transistors output stages. These possible fault states stored diagnostics register.
Semiconductor Group
1998-02-01
5250
Diagnostics information from different parts circuit collected diagnostics stored fault logic. information read Diagnostics output (open collector). fault logic consists 16-bit multiplexer that switches information three categories through Diagnostics output. always appears inverted DIAG when High. This means that, there overcurrent upper transistor, undervoltage overtemperature, will signaled immediately Diagnostics output. DIAG changes from High Low. check bit. Bits indicate momentary status comparators outputs (see Figure Changes status comparators output monitoring observed DIAG when counter multiplexer This necessary detecting underload. Bits monoflop generates short strobe signal when edge changes from High Low. status comparators output monitoring stored with this signal read bits When Enable Low, Phase input used clock input. edge rises, internal counter incremented corresponding channel multiplexer switched through. edge falls, signal output inverted. When Enable High, counter reset zero.
Strobe
Reset
AED01467
Figure
Semiconductor Group
1998-02-01
5250
Bits With these bits possible detect status gate voltages lower outputstage transistors status edge transition. whether lower transistor been turned indicates whether nominal/actual comparator switched. comparator switches when output current regulated. Bits These bits indicate presence overcurrent, undervoltage overtemperature. fault ORed output direct When multiplexer read out, bits through output once non-inverted (Phase Low) once inverted (Phase High). Assignment Error Register Bits High always High High when sink transistor turned High when sink transistor turned High when source transistor turned High when source transistor turned momentary states readout state falling edge Enable signal state falling edge Enable signal state falling edge Enable signal state falling edge Enable signal represent status outputs negative change edge Enable signal High gate-source voltage sink transistors moment readout event occurs during switching (Enable High) High sink transistor High actual current lower than nominal current High overcurrent detected source transistors High undervoltage detected High thermal link tripped
Bits 6-10
Bits 11-15
memories erased rising edge Enable input.
Semiconductor Group
1998-02-01
5250
Logic Assignment: Control Inputs, Output Transistors Enable Phase Output Output Transistor Transistor Transistor Transistor
voltage level, input open High voltage level transistor turned transistor conducting transistor conducting, switched current limiting output high-impedance
Semiconductor Group
1998-02-01
5250
RC/Sync Input Output Charge-Current SwitchingThreshold Control, Reset-Pulse Generation Output Input Nom/Act Comparator Nominal Actual Gate
Deadtime Comparator
Gate
AES01469
Figure
Logic
Semiconductor Group
1998-02-01
5250
Error Status Continuous Check Status Continuous Status Continuous High Status Continuous
Overcurrent Flag Status Status High Status High Status
Diagn.
High Status Continuous Status Strobed Status Strobed Status Latched Actual Current Nominal Latched Overcurrent T1/T2 Latched Undervoltage Latched Overtemperature Latched Reset Clock Monoflop Monoflop Strobe Reset Latch High Status Strobed High Status Strobed Sequential Multiplexer Status Strobed
16-to-1
Status
Nom/Act Stat. Act>Nom->High Overcurrent T1/T2 Status Undervoltage Status
Overtemperature Status
Enable Phase
Figure
Diagnostics Logic
Semiconductor Group
1998-02-01
AES01470
5250
Absolute Maximum Ratings Parameter Supply voltage Supply current Peak currents outputs Diode Forward Currents Diode Diode sense Output current actual-current Voltage actual-current Ground current, Chip temperature Storage temperature Thermal Resistances Junction ambient Junction case Operating Range Supply voltage Input voltage Enable, Phase, RC/Sync Voltage nominal Voltage actual Output current Junction temperature Enable Phase Inputs input voltage input voltage
Semiconductor Group
Symbol min.
Limit Values max.
Unit
IAct VAct IGND Tstg
RthjA RthjC
VNOM VACT
1998-02-01
5250
Characteristics
Parameter Supply current Output Turn-on resistance output transistors Phase deadtime Diode forward voltage output Diode forward voltage actual-current output Nominal Current Input current Symbol Limit Values min. typ. max. Enable High Unit Test Condition
Offset voltage measured VI(8
actual/nominal
Actual Current Turn-off delay nom/act comparator Common-mode error RC/Sync Sync frequency Trigger threshold lower upper Maximum charge voltage
VComm
VChm
Semiconductor Group
1998-02-01
5250
Characteristics (cont'd) Parameter Symbol Limit Values min. Undervoltage Cutout Disable Enable Hysteresis Diagnostics Output Activating delay (Enable High Low) Delay phase high Delay phase high Output voltage Leakage current high typ. max. Unit Test Condition
VUDIAG VUEN
tdef tddr tddf VDiag IDiag
Enable Enable
Semiconductor Group
1998-02-01
5250
(Tantalum)
Batt
Cooling Diagnostics
Phase Enable
5250
Nominal Actual RC/Sync. Sense
39.2
AES01472
Figure
Application Circuit
Semiconductor Group
1998-02-01
5250
Phase High Enable
VRC/Sync
QRSFF
Coil Current
Actual Voltage
Discharge operation started when nominal current reached. discharged Voltage RC/Sync limited internally charge operation.
When coil current reaches nominal value, sink transistor turned off. Independently this, element charged then discharged. Charge operation controlled deadtime comparator. element charged with 1mA.
AED01475
Figure
Chopper Mode with External Capacitor Resistor
Semiconductor Group
1998-02-01
5250
RC/Sync QRSFF
Coil Current Nominal Voltage Actual Voltage Output
Falling edge turns sink transistor.
Sink transistor turned again when nominal voltage reached.
AED01476
Figure
Synchron Mode
Semiconductor Group
1998-02-01
5250
Strobe Reset
AED01477
High
High Strobed Strobed High Strobed High Strobed
inductive load faultfree operation, diagnostics when read must show inverted inverted inverted inverted
Figure
Response Inductive Loads Normal Operation current regulation)
Semiconductor Group
1998-02-01
5250
Strobe Reset
AED01478
High
High Strobed Strobed High Strobed High Strobed
identical identical
fault
Figure Response Inductive Loads Shorted (Phase High)
Semiconductor Group
1998-02-01
5250
RC/Sync Strobe Reset
AED01479
Figure Response Inductive Loads Shorted (Phase High)
Semiconductor Group
1998-02-01
5250
RC/Sync Strobe Reset
AED01480
Indication load: while Enable conditions /bit /bit /bit /bit satisfied
Figure Response Inductive Loads Load
Semiconductor Group
1998-02-01
5250
Package Outlines P-SIP-15-1 (Plastic Single In-Line)
±0.3 ±0.06
4.62 1.52 ±0.08
17.78 ±0.25
1.27 17.78 0.69 ±0.1
0.25
4.14 ±0.33
10.7 +0.15
±0.13 4.29 9.37
17.5 ±0.15
0.61
Sorts Packing Package outlines tubes, trays etc. contained Data Book "Package Information".
Dimensions
Semiconductor Group
1998-02-01
GPI09015

5250 SPT-IC Overview Features Single phase driver stepper motor O

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