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APX6219
PWM Stepper Motor Driver
Features
* * * * * * * * Able to Drive Both Windings of Bipolar Stepper Motor Up to 750 mA Continuous Output Current for Each Winding Up to 28V Output Sustaining Voltage Internal PWM Current Control Built-in Protection Diode Low Output Saturation Voltage Internal Thermal Shutdown Lead Free Available (RoHS Compliant)
General Description
The APX6219 is designed to drive both winding of a two-phase bipolar stepper motor or bidirectionally control 2 DC motors. APX6219 includes two Hbridges capable of continuous output current of 750 mA with peak start up to 1A and operating voltages up to 28V. Motor winding current can be controlled by the internal fixed-frequency, pulse-width modulated (PWM), current-control circuitry. Wide range current control is controlled by means of two logic inputs with a external reference voltage for each bridge. The peak load current limit is set by the user's selection of a reference voltage and current-sensing resistor. Two logic-level select output current limits of 0%,33%, 67%, or 100% of the maximum level. A phase input to each bridge determines load current direction. A thermal shutdown protection circuit disables the outputs if the chip temperature over the safe operation limit. The APX6219 come in SOP-24 package.
Applications
* * * Scanner Stepping Motor Control Thermal Printer
Pin Configuration
OUT1A OUT2A SENSE2 COMP.INPUT2 OUT2B GND GND l02 I12 PHASE2 VREF2 RC2 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 VBB(LOAD SUPPLY) SENSE1 COMP.INPUT1 OUT1B l01 GND GND l11 PHASE1 VREF1 RC1 VCC(LOGIC SUPPLY)
SOP-24 (Top View)
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and advise customers to obtain the latest version of relevant information to verify before placing orders. Copyright ANPEC Electronics Corp. Rev. A.4 - Apr., 2005 1 www.anpec.com.tw
APX6219
Ordering and Marking Information
APX6219
L e a d F re e C o d e H a n d lin g C o d e Tem p. Range Package Code P ackage C ode K : SO P - 24 Tem p. Range I : -4 0 C to 8 5 C H a n d lin g C o d e TU : Tube TR : Tape & R eel L e a d F re e C o d e L : L e a d F re e B la n k : O rig in a l D e v ic e X X X X X - D a te C o d e
A P X6219 K :
A P X6219 XXXXX
Notes: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for MSL classification at lead-free peak reflow temperature.
Pin Description
PIN NO. 1,2 3,23 Name OUTPUT A Sense Resistor Comparator Input OUTPUT B Ground I/O O O Description H- bridge Output connection. The output stage is a "H" bridge formed by four transistors and four-protection diode for switching applications. Connection to lower emitters of output stage for insertion of current sensor resistor to check the peak value of output current The voltage across the sense resistor is feedback to this input through the low pass filter RC CC. The higher power transistors are disabled when the sense voltage exceeds the reference voltage of selected comparator. The current decays for a time set by RT CT when this happen See pins 1,2 Ground connection These pins are logic inputs which select the outputs of the comparators to set the output current level. Current also depends on the sensing resistor and reference voltage. I0 I1 Current level H H No current Low current 1/3 IO max L H Medium current 2/3 IO max H L Maximum current IO max L L See pins 8,9; current level control for channel2 This TTL-compatible logic input sets the current flow direction through load. A schmitt trigger with this input provides the noise immunity and a delay circuit prevents output stage short circuits during switching A voltage apply this pin sets the input of a comparator to control the output current A RTCT connection to this pin sets the off time of higher power transistor Logic supply voltage Load supply voltage
4,22 5,21 6,7,18,19
I O
8,9
I02/I12
I
20,17 10,16 11,15 12,14 13 24
I01/I11 PHASE Reference Voltage RTCT VCC VBB
I I I O
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APX6219
Block Diagram
(22) COMPARATOR INPUT1 (14) RC1
) (13) LOGIC SUPPLY
(24) LOAD SUPPLY
(20) I01 7 I11 ]^ 1 (16) PHASE1
LOGIC SURRENT SELECT
POWER BRIDGE 1
(1) OUT1A
WINDING1
(21) OUT1B
(15) VREF1 (11) VREF2
THERMAL SHUTDOWN
(2) OUT2A
(8) I02 (9) I12 (10) PHASE2
LOGIC SURRENT SELECT
POWER BRIDGE 2
WINDING2
(5) OUT2B
(6,7,18,19) (4) GND COMPARATOR INPUT2
(12) RC2
(23) SENSE1 RSENSE1
(3) SENSE2 RSENSE2
Absolute Maximum Ratings
Symbol VBB IO IO VCC VIN VSENSE RTH,JA RTH,JC PD Parameter Load Supply Voltage Output Current (Peak) Output Current (Continuous) Logic Supply Voltage Logic Input Voltage Driver Output Sense Voltage Thermal Resistance - Junction to Ambient* SOP-24 Thermal Resistance - Junction to Case SOP-24 Power Dissipation Rating 30 1 750 7 -0.3 to VCC+0.3 1.5 75 15 Internally Limited 0 to 150 0 to 70 -65 to +150 260 Unit V A mA V V V C/W C/W W C C C C
TJ Junction Temperature TOP Operating Temperature Range TSTG Storage Temperature Range TL Lead Temperature (Soldering, 10 second) (*) With minimized copper area.
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APX6219
Electrical Characteristics
Unless otherwise noted these specifications apply over full temperature, VBB=28V, VCC=4.75 to 5.25V, VREF=5V, TJ=0 to 125C . Typical values refer to TJ=25C .
Symbol
Parameter
Test Conditions
Min. 10
APX6219 Typ. Max. 28 50 -50 0.7 1.1 1.4 1.7 50 2 2 25 10
Unit V A V A V mA mA V V A A V mA mA
Output drivers (OUTA or OUTB) VBB Motor Supply Voltage ILEAK Output Leakage Current VOUT=VBB VOUT=0 Sink driver, IOUT=+500mA Sink driver, IOUT=+750mA Source driver, IOUT=-500mA Source driver, IOUT=-750mA VR=28V Sink diode Source diode IF=750mA Both bridges ON, no load Both bridges OFF All inputs All inputs VIN=2.4V VIN=0.8V I0=I1=0.8V, no load I0=I1=2.4V, no load I0=I1=0.8V I0=2.4V,I1=0.8V I0=0.8V,I1=2.4V RT=56K, CT=820pF
VCE(sat) IR VF
Output Saturation Voltage Clamp Diode Leakage Current Clamp Diode Forward Voltage
IBB(on) Driver Supply Current IBB(off) Driver Supply Current Control logic VIH Voltage Input VIL Voltage Input IIH Input Current IIL Input Current VREF Reference Voltage ICC (on) Logic Supply Current ICC (off) Logic Supply Current VREF/VSENSE Current Limit Threshold (at trip point)
<1 <-1 0.4 0.8 1.1 1.4 <1 1.6 1.6 14 2 2.4 <1 -5 1.5 47 8 10 15 30 45 2 150
9.5 13.5 25.5
0.8 20 -50 7.5 57 14 10.5 16.5 34.5
TOFF Cutoff Time TD Turn off Delay Protection Over Temperature Shutdown OTS Over Temperature Shutdown Hystersis
s s C C
Hystersis
20
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APX6219
PWM Output Current Waveform
V PHASE
+
IO U T 0
I TR IP
I TR IP =V R E F /10 R S
td
t off
Load Current Paths
VBB
motor
B ridge on Rs S ource off A ll off
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APX6219
Principle Operating Sequence
Stand-by 1 I01 I11
Half-step motor drive 23 4 5 67 8 1
Full-step motor drive 2 3 4 567 8
Phase1 Phase2 I02 I12
x x
x x
Motor1 Current
500mA 333 mA
-167 mA -333 mA -500mA
Motor2 current
500mA 333 mA 167 mA
-333 mA -500mA
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APX6219
PWM Current-Control Circuitry
V BB "
O U TA V RE F #
m o to r
O U TB
S e nse 2 0 k /1 0 C O M P IN 4 0 k I0 1 0 k RC Rs 1 CC RT 5 6 k CT 820pf ! CMP + O ne sho t " S o urce D isa b le
RC
I1 %
Phase OU TA H L OU TB L H
True Table
H L
Typical Application Circuit
STEPPER MOTOR
R T= 56K , C T=820p F R C=1K , C C=820pF R S= 1
1
RS RC CC
24 23 22 21 20 19 18 17 16 15 14 13
RC
V BB RS + 0 .1 F CC 100 F
2 3 4 5 6 7 8
Fom P
Fom P
9 10
V REF2
11 12
CT
V REF1 CT V CC RT
0 .1 F
RT
0 .1 F
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APX6219
Typical Characteristics
All Bridge Enable
All Bridge Disable
I0
I0
I1
I1
IL(0~300mA) IL(0~300mA) VOUT1A(1V/div) VOUT1A(1V/div)
Time ( 0.1ms/div)
Time ( 0.1ms/div)
I0, I1 Threshold Voltage
2.5
1.8 1.6
PHASE Pin Threshold Voltage
VPHASE+
2
IIO=0A VBB=12V
1.4 1.2
PHASE (V)
I0 , I1(V)
1.5
VPHASEIPHASE+=IPHASE-=0A VBB=12V
1 0.8 0.6 0.4 0.2
1
0.5
0 4 4.5 5 5.5 6
0 4 4.5 5 5.5 6
VCC (V)
VCC (V)
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APX6219
Typical Characteristics
Output Saturation Voltage
900 800 700
RTCT vs. Cut Off Time
110 100
Sink
600
90
Source
80
CT=470pF
820pF
1000pF
IE (mA)
500 400 300 200 100 0 0 0.25 0.5 0.75 1 1.25 1.5 1.75
RT (k)
70 60 50 40 30 20 0 10 20 30 40 50 60 70 80 90 100
VCC=5V VBB=12V
VCE (V)
Cut Off Time(s)
Operating Waveform1
Operating Waveform2
RT=56k,CT=820pF, RC=1k,CC=820pF IL(300mA~-300mA)
VPHASE1(5V/div)
RT=56k,CT=820pF, RC=1k,CC=820pF
IL(500mA~-500mA)
VCOMP INPUT1
VOUT1A(10V/div)
VRC1(1.6V~4.2V)
VOUT1B(10V/div)
VOUT1A(10A/div)
Time (1ms/div)
Time (0.1ms/div)
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APX6219
Typical Characteristics
Half Stage Operation
VOUT1A(10V/div)
VOUT1B(10V/div)
IL(300mA~-300mA)
VRC1(1.6V~4.2V)
Time (5ms/div)
Copyright ANPEC Electronics Corp. Rev. A.4 - Apr., 2005
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APX6219
Application Information
PWM Current Control The APX6219 dual bridge is designed to drive both windings of a bipolar stepper motor. Output current is sensed and controlled independently in each bridge by an external sense resistor (RS), internal comparator, and monostable multivibrator. When the bridge is turned on, current increases in the motor winding and it is sensed by the external sense resistor until the sense voltage (VCOMPIN) reaches the level set at the comparator's input: ITRIP = VREF/10 RS The comparator then triggers the monostable which turns off the source driver of the bridge. The actual load current peak will be slightly higher than the trip point (especially for low-inductance loads) because of the internal logic and switching delays. This delay (TD) is typically 2s. After turn-off, the motor current decays, going through the ground-clamp diode and sink transistor (source off). The source driver's off time is determined by the external RC timing components, where TOFF = RTCT within the range of 30k to 100k and 470pF to 1000pF.When VRC drop to certain voltage, the source driver will be re-enabled automatically (bridge on), the winding current is again limited at the desired level. Loads with high VBB, low L , high-frequency and low current will may result in high turn-on current peaks. This peak (appearing across RS) will attempt to trip the comparator, resulting in erroneous current control or high-frequency oscillations. An external RCCC time delay should be used to form low pass filter to reduce noise to avoid the comparator's fault operation. The locations of RC, CC, RC components should be as close to the APX6219 as possible. Logic Control Of Output Current Two logic level inputs (l0 and I1) allow digital selection of the motor winding current at 100%, 67%, 33%, or 0% of the maximum level per the table. The 0% output current condition turns off all drivers in the bridge and can be used as an OUTPUT Disable/Enable function. During half-step operations, the l0 and l1 allow the P to control the motor at a constant torque between all positions in an eight-step sequence. This is accomplished by digitally selecting 67% drive current when two phases are on. When all drivers are turn off will make rapid current decay when phases be changed. This helps to ensure proper motor operation at high step rates. The logic control inputs can also be used to select a reduced current level (and reduced power dissipation) for `hold' conditions and/or increased current (and available torque) for start-up conditions. General The PHASE input to each bridge determines the direction motor winding current flows. An internally generated deadtime (approximately 2s) prevents shoot through that can occur when switching the PHASE input. Thermal protection circuitry turns off all drivers when the junction temperature reaches +150C. It is only intended to protect the device from failures due to excessive junction temperature and should not imply that output short circuits are permitted. The output drivers are re-enabled when the junction temperature cools to +130C. The APX6219 output drivers are optimized for low output saturation, less than 2V (source plus sink) at loading 500mA.Under normal operating conditions, this allows continuous operation of both bridges simultaneously at 750mA (such as Typical Application).
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APX6219
Package Information
SO - 300mil ( Reference JEDEC Registration MS-013)
D N
H
E
GAUGE PLANE
123 A e B A1 L
1
Millimeters Dim A A1 B D E e H L N 1 Min. 2.35 0.10 0.33 Max. 2.65 0.30 0.51
Variations- D Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. 10.10 11.35 12.60 15.20 17.70 8.80 Max. 10.50 11.76 13 15.60 18.11 9.20 Dim A A1 B D E e H L N 1
Inches Min. 0.093 0.004 0.013 Max. 0.1043 0.0120 0.020
Variations- D Variations SO-16 SO-18 SO-20 SO-24 SO-28 SO-14 Min. 0.398 0.447 0.496 0.599 0.697 0.347 Max. 0.413 0.463 0.512 0.614 0.713 0.362
See variations 7.40 7.60
See variations 0.2914 0.2992
1.27BSC 10 0.40 10.65 1.27
0.050BSC 0.394 0.016 0.419 0.050
See variations 0 8
See variations 0 8
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APX6219
Physical Specifications
Terminal Material Lead Solderability Solder-Plated Copper (Solder Material : 90/10 or 63/37 SnPb), 100%Sn Meets EIA Specification RSI86-91, ANSI/J-STD-002 Category 3.
Reflow Condition
TP
(IR/Convection or VPR Reflow)
tp C ritical Z one T L to T P
R am p-up
T e m p e ra tu re
TL T sm ax
tL
T sm in R am p-down ts Preheat
25
t 25 C to Peak
T im e
Classificatin Reflow Profiles
Profile Feature Average ramp-up rate (TL to TP) Preheat - Temperature Min (Tsmin) - Temperature Max (Tsmax) - Time (min to max) (ts) Time maintained above: - Temperature (TL) - Time (tL) Peak/Classificatioon Temperature (Tp) Time within 5C of actual Peak Temperature (tp) Ramp-down Rate Sn-Pb Eutectic Assembly 3C/second max. 100C 150C 60-120 seconds 183C 60-150 seconds See table 1 10-30 seconds Pb-Free Assembly 3C/second max. 150C 200C 60-180 seconds 217C 60-150 seconds See table 2 20-40 seconds
6C/second max. 6C/second max. 6 minutes max. 8 minutes max. Time 25C to Peak Temperature Notes: All temperatures refer to topside of the package .Measured on the body surface.
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APX6219
Classificatin Reflow Profiles(Cont.)
Table 1. SnPb Entectic Process - Package Peak Reflow Tem peratures 3 3 Package Thickness Volum e m m Volum e m m <350 350 <2.5 m m 240 +0/-5C 225 +0/-5C 2.5 m m 225 +0/-5C 225 +0/-5C Table 2. Pb-free Process - Package Classification Reflow Tem peratures 3 3 3 Package Thickness Volum e mm Volum e mm Volum e mm <350 350-2000 >2000 <1.6 m m 260 +0C* 260 +0C* 260 +0C* 1.6 m m - 2.5 m m 260 +0C* 250 +0C* 245 +0C* 2.5 m m 250 +0C* 245 +0C* 245 +0C* *Tolerance: The device m anufacturer/supplier shall assure process com patibility up to and including the stated classification tem perature (this m eans Peak reflow tem perature +0C. For exam ple 260C+0C) at the rated MSL level.
Reliability test program
Test item SOLDERABILITY HOLT PCT TST ESD Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD 78 Description 245C , 5 SEC 1000 Hrs Bias @ 125 C 168 Hrs, 100 % RH , 121C -65C ~ 150C, 200 Cycles VHBM > 2KV, VMM > 200V 10ms , Itr > 100mA
Carrier Tape
t P P1 D
Po E
F W
Bo
Ao
Ko D1
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APX6219
Carrier Tape(Cont.)
T2
J C A B
T1
Application
A 3301
B 62 1.5 D
SOP- 24
F
C 12.75 0.15 D1
J
T1
T2
W
P
E
2 0.6 24.4 0.2 2 0.2 Po P1 Ao
24 0.3 12 0.1 .75 0.1 Bo Ko t
11.5 0.1 1.55 +0.1 1.5+ 0.25 4.0 0.1 2.0 0.1 10.9 0.1 15.9 0.1 3.1 0.1 .350.05 (mm)
Cover Tape Dimensions
Application SOP- 24 Carrier Width 24 Cover Tape Width 21.3 Devices Per Reel 1000
Customer Service
Anpec Electronics Corp. Head Office : 5F, No. 2 Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. Tel : 886-3-5642000 Fax : 886-3-5642050 Taipei Branch : 7F, No. 137, Lane 235, Pac Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, R. O. C. Tel : 886-2-89191368 Fax : 886-2-89191369
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