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L6219DS
VBB
DUAL FULL-BRIDGE PWM MOTOR DRIVER
OUT 1A OUT 2A SENSE 2 COMP IN 2 OUT 2B GROUND GROUND I 02 I 12 PHASE 2 V REF 2 RC 2 1 2 3 2 4 5 6 7 8 1 24 23 22 21 20 19 18 17 LOAD SUPPLY SENSE 1 COMP IN 1 OUT 1B I 01 GROUND GROUND I 11 PHASE 1 V REF 1 RC 1 LOGIC SUPPLY
The L6219DS motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 45 V and include internal pulse-width modulation (PWM) control of the output current to 750 mA. The outputs have been optimized for a low output saturation voltage drop (less than 1.8 V total source plus sink at 500 mA). For PWM current control, the maximum output current is determined by the user's selection of a reference voltage and sensing resistor. Two logic-level inputs select output current limits of 0, 33, 67, or 100% of the maximum level. A PHASE input to each bridge determines load current direction. The bridges include both ground clamp and flyback diodes for protection against inductive transients. Internally generated delays prevent cross-over currents when switching current direction. Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. The L6219DS is supplied in a 24-lead surface-mountable SOIC. Its batwing construction provides for maximum package power dissipation in the smallest possible construction. This device is also available on special order for operation from -40C to +85C or to +105C.
Data Sheet 29319.43
PWM 1
9 9 10 11 12 2
1
16 15 14
PWM 2
V CC
13
Dwg. PP-005-3
ABSOLUTE MAXIMUM RATINGS at TJ 150C
Motor Supply Voltage, VBB .................... 45 V Output Current, IOUT (Peak) ........................................ +1.0 A (Continuous) .......................... +750 mA Logic Supply Voltage, VCC ................... 7.0 V Logic Input Voltage Range, VIN ............................... -0.3 V to +7.0 V Output Emitter Voltage, VSENSE ............ 1.5 V Package Power Dissipation, PD ........................................................ See Graph Operating Temperature Range, TA ................................. -20C to +85C Storage Temperature Range, TS ............................... -55C to +150C
Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified peak current rating or a junction temperature of +150C.
FEATURES
I Interchangeable with SGS L6219DS I 750 mA Continuous Output Current I 45 V Output Sustaining Voltage I Internal Clamp Diodes I Internal PWM Current Control I Low Output Saturation Voltage I Internal Thermal Shutdown Circuitry I Similar to Dual PBL3717, UC3770
Always order by complete part number, e.g., L6219DS .
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
PWM CURRENT-CONTROL CIRCUITRY
CHANNEL 1 TERMINAL NUMBERS SHOWN. VBB
24
OUT B
1 21
OUT A V REF 15 20 k /10 40 k 10 k I 0 20 I 1 17 RS
23 SENSE
COMP IN -
22
+
ONE SHOT
14 RC
SOURCE DISABLE
RC CC RT
CT
Dwg. EP-007-5
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
2.5
TRUTH TABLE
RJT = 6C/W
PHASE H L
OUTA H L
OUTB L H
2.0
1.5
1.0
R JA = 55C/W
0.5
0 25 50 75 100 125 150
Dwg. GP-019B
TEMPERATURE in C
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright (c) 1998 Allegro MicroSystems, Inc.
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25C, TJ 150C, VBB = 45 V, VCC = 4.75 V to 5.25 V, VREF = 5.0 V (unless otherwise noted).
Limits Characteristic Output Drivers (OUTA or OUTB) Motor Supply Range Output Leakage Current VBB ICEX VOUT = VBB VOUT = 0 Output Sustaining Voltage Output Saturation Voltage VCE(sus) VCE(SAT) IOUT = 750 mA, L = 3.0 mH Sink Driver, IOUT = +500 mA Sink Driver, IOUT = +750 mA Source Driver, IOUT = -500 mA Source Driver, IOUT = -750 mA Clamp Diode Leakage Current Clamp Diode Forward Voltage Driver Supply Current IR VF IBB(ON) IBB(OFF) Control Logic Input Voltage VIN(1) VIN(0) Input Current IIN(1) All inputs All inputs VIN = 2.4 V VIN = 0.8 V Reference Voltage Range Current Limit Threshold (at trip point) VREF VREF / VCOMPIN Operating I0 = I1 = 0.8 V I0 = 2.4 V, I1 = 0.8 V I0 = 0.8 V, I1 = 2.4 V Thermal Shutdown Temperature Total Logic Supply Current TJ ICC(ON) ICC(OFF) I0 = I1 = 0.8 V, No Load I0 = I1 = 2.4 V, No Load 2.4 -- -- -- 1.5 9.5 13.5 25.5 -- -- -- -- -- <1.0 - 3.0 -- 10 15 30 170 40 10 -- 0.8 20 -200 7.5 10.5 16.5 34.5 -- 50 12 V V A A V -- -- -- C mA mA VR = 45 V IF = 750 mA Both Bridges On, No Load Both Bridges Off 10 -- -- 45 -- -- -- -- -- -- -- -- -- < 1.0 <-1.0 -- 0.4 1.0 1.0 1.3 < 1.0 1.6 20 5.0 45 50 -50 -- 0.6 1.2 1.2 1.5 50 2.0 25 10 V A A V V V V V A V mA mA Symbol Test Conditions Min. Typ. Max. Units
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
APPLICATIONS INFORMATION
PWM CURRENT CONTROL
The L6219DS 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 2 s. After turn-off, the motor current decays, circulating through the ground-clamp diode and sink transistor. The source driver's off time (and therefore the magnitude of the current decrease) is determined by the monostable's external RC timing components, where toff = RTCT within the range of 20 k to 100 k and 100 pF to 1000 pF. When the source driver is re-enabled, the winding current (the sense voltage) is again allowed to rise to the comparator's threshold. This cycle repeats itself, maintaining the average motor winding current at the desired level. Loads with high distributed capacitances 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 further delay the action of the comparator. Depending on load type, many applications will not require these external components (SENSE connected to COMP IN).
I TRIP
PWM OUTPUT CURRENT WAVE FORM
V PHASE
+ I OUT 0 -
td
t off
Dwg. WM-003-1A
LOAD CURRENT PATHS
V BB
RS
BRIDGE ON SOURCE OFF ALL OFF
Dwg. EP-006-1
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
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 ENABLE function. sequence. This is accomplished by digitally selecting 100% drive current when only one phase is on and 67% drive current when two phases are on. Logic highs on both l0 and l1 turn off all drivers to allow rapid current decay when switching phases. 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.
CURRENT-CONTROL TRUTH TABLE
l0 L H L H I1 L L H H Output Current VREF/10 RS = ITRIP VREF/15 RS = 2/3 ITRIP VREF/30 RS = 1/3 ITRIP 0
GENERAL
The PHASE input to each bridge determines the direction motor winding current flows. An internally generated deadtime (approximately 2 s) prevents crossover currents that can occur when switching the PHASE input. All four drivers in the bridge output can be turned off between steps (l0 = l1 2.4 V) resulting in a fast current decay through the internal output clamp and flyback diodes. The fast current decay is desirable in half-step and high-speed applications. The PHASE, l0 ,and I1 inputs float high. Varying the reference voltage (VREF) provides continuous control of the peak load current for microstepping applications. Thermal protection circuitry turns off all drivers when the junction temperature reaches +170C. 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 +145C. The L6219DS output drivers are optimized for low output saturation voltages--less than 1.8 V total (source plus sink) at 500 mA. Under normal operating conditions, when combined with the excellent thermal properties of the batwing package design, this allows continuous operation of both bridges simultaneously at 500 mA.
These logic level inputs greatly enhance the implementation of P-controlled drive formats. 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
TYPICAL APPLICATION
STEPPER MOTOR
1 2 RS 3 RC CC 4 5 6 7 8 FROM P 2
VBB
VBB 24 RS 23 +
1
RC 22 CC 21 20 19 18 17 FROM P
PWM 1
9 9 10 VREF 11 12 2
1
16 15 14 VREF
PWM 2
V CC
13 +5 V
RT
CT
RT
CT
Dwg. EP-008-2
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
Dimensions in Inches
(for reference only)
24 13
0.0125 0.0091
0.2992 0.2914
0.491 0.394 0.050 0.016
0.020 0.013
1
2
3
0.6141 0.5985
0.050
BSC NOTE 1 NOTE 3
0 TO 8
0.0926 0.1043 0.0040 MIN.
Dwg. MA-008-25 in
Dimensions in Millimeters
(controlling dimensions)
24 13
0.32 0.23
7.60 7.40
10.65 10.00 1.27 0.40
0.51 0.33
1
2
3
15.60 15.20
1.27
BSC NOTE 1 NOTE 3
0 TO 8
2.65 2.35 0.10 MIN.
Dwg. MA-008-25A mm
NOTES: 1. Webbed lead frame. Leads indicated are internally one piece. 2. Lead spacing tolerance is non-cumulative. 3. Exact body and lead configuration at vendor's option within limits shown.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
BRIDGE & HALF-BRIDGE DRIVERS
IN ORDER OF 1) OUTPUT CURRENT AND 2) OUTPUT VOLTAGE
Output Ratings * mA 650 750 V 30 30 45 45 45 33 14 50 45 45 50 50 45 50 50 50 50 45 45 28 Description dual PWM full bridge dual PWM full bridge dual PWM full bridge dual PWM full bridge dual PWM full bridge dual PWM full bridge 3-O back-EMF controller/driver PWM full bridge dual PWM full bridge dual PWM full bridge PWM microstepping full bridge PWM microstepping full bridge 3-O brushless controller/driver dual full bridge PWM full-bridge PWM full-bridge PWM full-bridge PWM control PWM control 3-O MOSFET controller Internal Diodes X X X X X X X X X X X X X X X X X X X -
Features Outputs bipolar bipolar bipolar bipolar bipolar bipolar DMOS bipolar bipolar bipolar Darlington/SatlingtonTM Darlington/SatlingtonTM Darlington Darlington Darlington Darlington DMOS Darlington bipolar DMOS Internal Protection X X X X X X X X X X X X X X X X X - X X Part Number 3966 3968 2916 2919 6219 3964 8902-A 3953 2917 2918 3955 3957 2936 2998 3951 3952 3958 2962 2961 3933
800 900 1300 1500
2000
3000 3400 --
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or over-current protection voltage limits. Complete part number includes additional characters to indicate operating temperature range and package style.
L6219DS DUAL FULL-BRIDGE MOTOR DRIVER
The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000

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