UDN2962: Dual Solenoid/Motor Driver PWM Current Control

Data Sheet
29319.12A‡
2962
DUAL SOLENOID/MOTOR DRIVER
—PULSE-WIDTH MODULATED CURRENT CONTROL
1
IN A
2
SENSE A
3
SINK A
4
SOURCE A
5
THS A
6
7
SOURCE B
8
SINK B
9
SENSEB
10
IN B
11
THS B
12
t
c
u
d
o ly
r
P On
d e
e
c
u
it n ren
n
e
f
o
e
c
s rR
i
D o
F
The peak output current and hysteresis for each source/sink pair is
set independently. Output current, threshold voltage, and hysteresis are
set by the user’s selection of external resistors. At the specified outputcurrent trip level, the source driver turns off. The internal clamp diode
then allows current to flow without additional input from the power
supply. When the lower current trip point is reached, the source driver
turns back on.
LOGIC
V CC
LOGIC
GROUND
Using PWM to minimize power dissipation and maximize load
efficiency, the UDN2962W dual driver is recommended for impact
printer solenoids and stepper motors. It is comprised of two source/
sink driver pairs rated for continuous operation to ±3 A. It can be
connected to drive two independent loads or a single load in the fullbridge configuration. Both drivers include output clamp/flyback
diodes, input gain and level shifting, a voltage regulator for singlesupply operation, and pulse-width modulated output-current control
circuitry. Inputs are compatible with most TTL, DTL, LSTTL, and
low-voltage CMOS or PMOS logic.
Dwg. No. D-1001
The UDN2962W is in a 12-pin single in-line power-tab package.
The tab is at ground potential and needs no insulation. For highcurrent or high-frequency applications, external heat sinking may be
required.
FEATURES
ABSOLUTE MAXIMUM RATINGS
at TJ ≤ +150°C
Supply Voltage, VCC . . . . . . . . . . . . . . 45 V
Peak Output Current, IOUT . . . . . . . . . ±4 A
Input Voltage Range,
VIN . . . . . . . . . . . . . . . -0.3 V to +7.0 V
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . -20°C to +85°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . -55°C to +150°C
■
■
■
■
■
4 A Peak Output
45 V Min. Sustaining Voltage
Internal Clamp Diodes
TTL/PMOS/CMOS Compatible Inputs
High-Speed Chopper
NOTE: 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 and a junction
temperature of +150°C.
Always order by complete part number: UDN2962W .
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
FUNCTIONAL BLOCK DIAGRAM
(ONE OF TWO DRIVERS)
VCC
SOURCE
LOAD
SINK
IN
SENSE
GND
+
RS
(TYP.0.1
_
-10
)
VREF
RH
THS
RT
Dwg. No. D-1002
TRUTH TABLE
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
10
VIN
VSENSE
SOURCE
DRIVER
SINK
DRIVER
High
Low
Low
NA
<VTHS /10
>VTHS /10
Off
On
Off
Off
On
On
RθJT = 2.0°C/W
8
3.0°C/W HEAT SINK
RθJA = 5.0°C/W
6
12°C/W HEAT SINK
RθJA = 14°C/W
4
2
FREE AIR, R θJA = 38°C/W
0
25
50
75
100
TEMPERATURE IN °C
125
150
Dwg. GP-012B
115 Northeast Cutoff, Box 15036
W
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1986, 2002 Allegro MicroSystems, Inc.
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
ELECTRICAL CHARACTERISTICS at TA = +25°C, TJ ≤ +150°C, VCC = 45 V, VSENSE = 0 V (unless
otherwise noted).
Characteristic
Supply Voltage Range
Symbol
Test Conditions
Min.
Limits
Typ. Max.
Units
VCC
Operating
20
—
45
V
ICEX
VIN = 2.4 V, VSOURCE = 0 V
—
<-1.0
-100
µA
VIN = 2.4 V, VSINK = 45 V
—
<1.0
100
µA
Source Drivers, ILOAD = 3.0 A
—
2.1
2.3
V
Source Drivers, ILOAD = 1.0 A
—
1.7
2.0
V
Sink Drivers, ILOAD = 3.0 A
—
1.7
2.0
V
Sink Drivers, ILOAD = 1.0 A
—
1.1
1.3
V
IOUT = ±3.0 A, L = 3.5 mH
45
—
—
V
VTHS = 0.6 V to 1.0 V, L = 3.5 mH
—
—
±25
%
VTHS = 1.0 V to 2.0 V, L = 3.5 mH
—
—
±10
%
VTHS = 2.0 V to 5.0 V, L = 3.5 mH
—
—
±5.0
%
Output Drivers
Output Leakage Current
Output Saturation Voltage
VCE(SAT)
Output Sustaining Voltage
VCE(sus)
Output Current Regulation
∆IOUT
Clamp Diode Forward Voltage
VF
IF = 3.0 A
—
1.7
2.0
V
Output Rise Time
tr
ILOAD = 3.0 A, 10% to 90%, Resistive Load
—
0.5
1.0
µs
Output Fall Time
tf
ILOAD = 3.0 A, 90% to 10%, Resistive Load
—
0.5
1.0
µs
VIN(1)
2.4
—
—
V
VIN(0)
—
—
0.8
V
Control Logic
Logic Input Voltage
Logic Input Current
IIN(1)
VIN = 2.4 V
—
1.0
10
µA
IIN(0)
VIN = 0.8 V
—
-20
-100
µA
ITHS(ON)
VTHS ≥ 500 mV, VSENSE ≤ VTHS /10.5
—
-2.0
—
µA
ITHS(HYS)
VSENSE ≥ VTHS /9.5, VTHS = 0.6 V to 5.0 V
140
200
260
µA
VTHS /VSENSE Ratio
—
At Trip Point, VTHS = 2.0 V to 5.0 V
9.5
10
10.5
—
Supply Current
(Total Device)
lCC
VIN = 2.4 V, Outputs Off
—
8.0
12
mA
VIN = 0.8 V, Outputs Open
—
25
40
mA
Propagation Delay Time
(Resistive Load)
tpd
50% VIN to 50% VOUT, Turn Off
—
—
2.5
µs
50% VIN to 50% VOUT, Turn On
—
—
3.0
µs
100% VSENSE to 50% VOUT*
—
—
3.0
µs
* Where VSENSE ≥ VTHS /9.5
NOTE: Negative current is defined as coming out of (sourcing) the specified device pin.
www.allegromicro.com
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
CIRCUIT DESCRIPTION
AND APPLICATIONS INFORMATION
The UDN2962W high-current driver is intended for use as a
free-running, pulse-width modulated solenoid driver.
Circuit Layout. To prevent interaction
between channels, each of the two high-level
power ground returns (the low side of the
sense resistors) must be returned independently to the low-level signal ground (pin 1).
The circuit common (pin 1) can then be
routed to the system ground.
Circuit Description. In operation, the source and sink drivers are
both turned on by a low level at the input. The load current rises with
time as a function of the load inductance, total circuit resistance, and
supply voltage and is sensed by the external sense resistor (RS).
When the load current reaches the trip point (ITRIP), the comparator
output goes high and turns off the source driver. The actual load
current will peak slightly higher than ITRIP because of the internal logic
and switching delays.
The printed wiring board should utilize a
heavy ground plane. For optimum performance, the driver should be soldered directly
into the board.
After the source driver is turned off, the load current continues to
circulate through the sink driver and an internal ground clamp diode.
The rate of current decay is a function of the load inductance and total
circuit resistance.
The power supply (VCC) should be
decoupled with an electrolytic capacitor
(≥10 µF) as close as possible to pin 7.
An internal constant current sink reduces the trip point (hysteresis)
until the decaying load current reaches the lower threshold, when the
comparator output goes low and the source driver is again turned on.
Load current is again allowed to rise to the trip point and the cycle
repeats.
SUPPLY
SYSTEM GROUND
R
Maximum load current and hysteresis is determined by the user.
Determining Maximum Load Current and Hysteresis. Trip
current (ITRIP) is determined as a function of resistance RS and the
threshold voltage, VTHS:
ITRIP =
3
S
VIN
Hysteresis percentage (H) is determined by resistance RH and is
independent of the load current:
VSINK
VSOURCE
RH
VCC
GND
VCC
GND
50 x VREF
The chopping frequency is asynchronous and a function of the
system and circuit parameters, including load inductance, supply
voltage, hysteresis setting, and switching speed of the driver.
I LOAD
I TRIP ¥ RS =VTHS
VTHS
Resistance RT is determined as:
RT =
10
+
TYPICAL WAVESHAPES
where VTHS = 10 x VSENSE = 0.6 V to 5.0 V.
H=
7
R
Dwg. OP-001
VTHS
10 RS
1
S
Dwg. WP-006
RH VTHS
VREF – VTHS
Note that if VTHS = VREF, then RT = ∞.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
APPLICATIONS INFORMATION
RESISTOR RH VALUE
AS A FUNCTION OF HYSTERESIS
RESISTOR RT VALUE
AS A FUNCTION OF PEAK LOAD CURRENT
25
25
20
REF
20
= 5 V
R T IN k½
15
RH
IN
k
½
V
10
V =5V
RREF
S = 0.1 ½
15
5%
H=2 0%
H=2 5%
H=1
H=10%
H=5%
10
5
5
0
0
40
20
60
80
100
HYSTERESIS, H, IN PERCENT
0
0
0.5
1.0
2.5
3.0
1.5
2.0
LOAD CURRENT, IMAX , IN AMPERES
Dwg. No. A-12,417
3.5
4.0
Dwg. No. A-12,416
Dwg. No. D-1004
RH AND RT DETERMINE HYSTERESIS AND PEAK CURRENT
NOTE: Each of the drivers includes an internal logic delay to prevent
potentially destructive crossover currents within the driver during phase
changes. However, never simultaneously enable both inputs in the fullbridge configurations: A destructive short-circuit to ground will result.
www.allegromicro.com
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
Dimensions in Inches
(controlling dimensions)
0.180
1.260
1.240
0.020
MAX
0.775
0.765
0.245
0.225
0.055
0.045
0.155 ø
0.145
0.140
0.365
INDEX
AREA
0.065
0.035
0.570
0.540
0.135
0.100
0.290 MIN
1
0.030
0.020
12
0.100
0.023
0.018
±0.010
NOTES: 1.
2.
3.
4.
5.
0.080
0.070
Dwg. MP-007 in
Lead thickness is measured at seating plane or below.
Lead spacing tolerance is non-cumulative.
Exact body and lead configuration at vendor’s option within limits shown.
Lead gauge plane is 0.030” below seating plane.
Supplied in standard sticks/tubes of 15 devices.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
Dimensions in Millimeters
(for reference only)
32.00
31.49
0.51
4.57
MAX
19.69
19.45
6.22
5.71
1.40
1.14
3.94
ø
3.68
3.56
9.27
INDEX
AREA
1.65
0.89
14.48
13.71
3.43
2.54
7.36 MIN
1
0.76
0.51
12
2.54
±0.254
0.59
0.45
2.03
1.77
Dwg. MP-007 mm
NOTES: 1.
2.
3.
4.
5.
Lead thickness is measured at seating plane or below.
Lead spacing tolerance is non-cumulative.
Exact body and lead configuration at vendor’s option within limits shown.
Lead gauge plane is 0.762 mm below seating plane.
Supplied in standard sticks/tubes of 15 devices.
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 lifesupport 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.
www.allegromicro.com
2962
DUAL PWM
SOLENOID/MOTOR DRIVER
MOTOR DRIVERS
Output Ratings*
Part Number†
INTEGRATED CIRCUITS FOR BRUSHLESS DC MOTORS
3-Phase Power MOSFET Controller
—
28 V
3933
3-Phase Power MOSFET Controller
—
40 V
3935
3-Phase Power MOSFET Controller
—
50 V
3932
3-Phase Back-EMF Controller/Driver
±900 mA
14 V
8902–A
3-Phase PWM Current-Controlled DMOS Driver
±3 A
50 V
3936
INTEGRATED BRIDGE DRIVERS FOR DC AND BIPOLAR STEPPER MOTORS
PWM Current-Controlled Dual Full Bridge
±500 mA
18 V
3965
Dual Full Bridge with Protection & Diagnostics
±500 mA
30 V
3976
PWM Current-Controlled Dual Full Bridge
±650 mA
30 V
3966
PWM Current-Controlled Dual Full Bridge
±650 mA
30 V
3968
Microstepping Translator/Dual Full Bridge
±750 mA
30 V
3967
PWM Current-Controlled Dual Full Bridge
±750 mA
45 V
2916
PWM Current-Controlled Dual Full Bridge
±750 mA
45 V
2919
PWM Current-Controlled Dual Full Bridge
±750 mA
45 V
6219
PWM Current-Controlled Dual Full Bridge
±800 mA
33 V
3964
PWM Current-Controlled Dual DMOS Full Bridge
±1.0 A
35 V
3973
PWM Current-Controlled Full Bridge
±1.3 A
50 V
3953
PWM Current-Controlled Dual Full Bridge
±1.5 A
45 V
2917
PWM Current-Controlled DMOS Full Bridge
±1.5 A
50 V
3948
PWM Current-Controlled Microstepping Full Bridge
±1.5 A
50 V
3955
PWM Current-Controlled Microstepping Full Bridge
±1.5 A
50 V
3957
PWM Current-Controlled Dual DMOS Full Bridge
±1.5 A
50 V
3972
PWM Current-Controlled Dual DMOS Full Bridge
±1.5 A
50 V
3974
PWM Current-Controlled Full Bridge
±2.0 A
50 V
3952
PWM Current-Controlled DMOS Full Bridge
±2.0 A
50 V
3958
Microstepping Translator/Dual DMOS Full Bridge
±2.5 A
35 V
3977
Dual DMOS Full Bridge
±2.5 A
50 V
3971
PWM Current-Controlled DMOS Full Bridge
±3.0 A
50 V
3959
UNIPOLAR STEPPER MOTOR & OTHER DRIVERS
Unipolar Stepper-Motor Quad Drivers
1.0 A
46 V
7024 & 7029
Unipolar Microstepper-Motor Quad Driver
1.2 A
46 V
7042
Unipolar Stepper-Motor Translator/Driver
1.25 A
50 V
5804
Unipolar Stepper-Motor Quad Driver
1.8 A
50 V
2540
Unipolar Stepper-Motor Quad Driver
3.0 A
46 V
7026
Unipolar Microstepper-Motor Quad Driver
3.0 A
46 V
7044
Function
* Current is maximum specified test condition, voltage is maximum rating. See specification for sustaining voltage limits or
over-current protection voltage limits. Negative current is defined as coming out of (sourcing) the output.
† Complete part number includes additional characters to indicate operating temperature range and package style.
Also, see 3175, 3177, 3235, and 3275 Hall-effect sensors for use with brushless dc motors.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000