L6219-S24-T [UTC]
DUAL FULL-BRIDGE PWM MOTOR DRIVER; 双路全桥式PWM电动机驱动器
| 型号： | L6219-S24-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | DUAL FULL-BRIDGE PWM MOTOR DRIVER |
| 文件： | 总6页 (文件大小：155K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L6219
LINEAR INTEGRATED CIRCUIT
DUAL FULL-BRIDGE PWM
MOTOR DRIVER
ꢀ
DESCRIPTION
The L6219 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 45V and include internal
pulse-width modulation (PWM) control of the output current to
750mA .The outputs have been optimized for a low output saturation
voltage drop (less than 1.8V total source plus sink at 500mA ).
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.
SOP-24
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.
*Pb-free plating product number: L6219L
ꢀ
FEATURES
*Interchangeable with SGS L6219
*750mA Continuous Output Current
*45V Output Sustaining Voltage
*Internal Clamp Diodes
*Internal PWM Current Control
*low Output Saturation Voltage
*Internal Thermal Shutdown Circuitry
ꢀ ORDERING INFORMATION
Order Number
Package
Packing
Normal
Lead Free Plating
L6219-S24-R
L6219-S24-T
L6219L-S24-R
L6219L-S24-T
SOP-24
SOP-24
Tape Reel
Tube
L6219L-S24-R
(1)Packing Type
(2)Package Type
(3)Lead Plating
(1) R: Tape Reel, T: Tube
(2) S24: SOP-24
(3) L: Lead Free Plating, Blank: Pb/Sn
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Copyright © 2005 Unisonic Technologies Co., Ltd
QW-R109-005,B
L6219
LINEAR INTEGRATED CIRCUIT
ꢀ
PIN CONFIGURATION
LOAD
SUPPLY
VBB
1
2
3
4
5
24
OUT1A
23
OUT2A
SENSE1
1
SENSE2
22 COMP IN1
21 OUT1B
2
COMP IN2
OUT2B
20
I01
GROUND
GROUND
19
18
6
7
GROUND
GROUND
17 I11
8
I02
I12
16 PHASE1
9
θ1
15
10
11
12
VREF1
PHASE2
VREF2
RC2
θ2
14
RC1
LOGIC
SUPPLY
Vcc 13
ꢀ
PWM CURRENT-CONTROL CIRCUITRY
CHANNEL 1
VBB
TERMINAL NUMBERS
24
SHOWN
OUTB
21
1
OUTA
VREF
15
SENSE
23
20kΩ
÷
10
-
+
SOURCE
DISABLE
ONE
SHOT
COMP IN
22
RC
40kΩ
10kΩ
14 RC
I0
I1
20
17
CC
RS
CT
RT
ꢀ
TRUTH TABLE
PHASE
OUTA
OUTB
H
L
H
L
L
H
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L6219
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL APPLICATION
STEPPER
MOTOR
VBB
1
1
2
3
4
5
24
VBB
RS
+
23
22
21
20
RS
Rc
Cc
Rc
Cc
2
19
18
6
7
FROM
μP
8
17
16
15
14
FROM
μP
9
θ1
10
11
12
θ2
VREF
CT
VREF
RT
Vcc 13
+5V
CT
RT
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L6219
LINEAR INTEGRATED CIRCUIT
ꢀ
ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)
PARAMETER
SYMBOL
VBB
RATINGS
45
UNIT
V
Motor Supply Voltage
Output Current
Peak
1.0
A
IOUT
Continuous
750
mA
V
Logic Supply Voltage
VCC
VIN
7.0
Logic Input Voltage Range
Output Emitter Voltage
Package Power Dissipation
Junction Temperature
Operating Temperature
Storage Temperature
-0.3 ~ +7.0
1.5
V
VSENSE
PD
V
See graph
125
TJ
°C
°C
°C
TOPR
TSTG
-20~+85
-40 ~ +150
Note 1.Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2.The device is guaranteed to meet performance specification within 0℃~+70°C operating temperature range
and assured by design from -20℃~+85°C.
3.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 +150°C
ꢀ
ELECTRICAL CHARACTERISTICS(Ta=25°C, VCC=4.75V to 5.25V, VBB=45V, TJ≤150°C, VREF=5.0V)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX UNIT
Output Drivers(OUTA or OUTB)
Motor Supply Range
VBB
ILEAK
10
-
-
<1.0
<-1.0
-
45
50
-50
-
V
µA
µA
V
VOUT=VBB
VOUT=0
OUT=±750mA,L=3.0mH
Output Leakage Current
Output Sustaining Voltage
-
I
VCE(SUS)
45
-
Sink Driver, IOUT=+500mA
Sink Driver, IOUT=+750mA
Source Driver, IOUT= -500mA
Source Driver, IOUT= -750mA
VR=45V
0.4
1.0
1.0
1.3
<1.0
1.6
20
0.6
1.2
1.2
1.5
50
2.0
25
10
V
-
V
Output Saturation Voltage
VCE(SAT)
-
V
-
V
Clamp Diode Leakage Current
Clamp Diode Forward Voltage
IR
-
µA
V
VF
IF=750mA
-
IBB(ON)
IBB(OFF)
Both Bridges On, No Load
Both Bridge Off
-
mA
mA
Driver Supply Current
Control Logic
-
5.0
VIN(1)
VIN(0)
All Inputs
2.4
-
-
-
V
V
µA
µA
V
-
Input Voltage
All Inputs
-
0.8
20
VIN=2.4V
-
-
<1.0
-3.0
-
Input Current
IIN(1)
VIN=0.8V
-200
7.5
10.5
16.5
34.5
50
Reference Voltage Range
VREF
Operating
1.5
9.5
13.5
25.5
-
I0=I1=0.8V
10
15
30
40
10
170
Current Limit Threshold
(at trip point)
VREF/VCOMPIN
I0=2.4V,I1=0.8V
I0=0.8V,I1=2.4V
I0=I1=0.8V ,No Load
I0=I1=2.4V ,No Load
-
-
ICC(ON)
ICC(OFF)
TSHDN
Total Logic Supply Current
mA
-
12
Thermal Shutdown Temperature
-
-
°C
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L6219
LINEAR INTEGRATED CIRCUIT
ꢀ
PWM CURRENT CONTROL
The L6219 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/10Rs
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 2µs.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
20kΩ to 100kΩ and 100pF to 1000pF
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).
LOAD CURRENT PATHS
PWM OUTPUT CURRENT WAVE FORM
VPHASE
VBB
+
IOUT
0
-
ITRIP
BRIDGE ON
RS
SOURCE OFF
ALL OFF
tD
tOFF
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L6219
LINEAR INTEGRATED CIRCUIT
ꢀ
TYPICAL CHARACTERISTIC
2.5
2.0
1.5
RθJT=6℃/W
RθJT=55℃/W
1.0
0.5
0
25
50
75
100
125
150
Temperature, in℃
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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