UGQ5140: Protected PowerHall Sensor IC -- Lamp/Solenoid Driver

Data Sheet
27695B
5140
PROTECTED POWERHALL® SENSOR IC
— LAMP/SOLENOID DRIVER
The UGQ5140K unipolar Hall effect switch is a monolithic
integrated circuit designed for magnetic actuation of low-power
incandescent lamps or inductive loads such as relays or solenoids.
Included on chip is a Darlington power output that is capable of continuously sinking in excess of 300 mA. Internal protection circuitry
limits surge (lamp turn-ON) or fault currents to approximately 900 mA.
A sensitive magnetic threshold allows the device to be used in conjunction with inexpensive magnets or in applications that require
relatively large operating distances.
X
1
2
3
4
OUTPUT
DIODE
GROUND
CC
SUPPLY
V
T
C
U
D
O
R
P only
Each sensor IC/driver includes a magnetic sensing Hall voltage
generator, operational amplifier, Schmitt trigger, voltage regulator, and
an open-collector, high-gain Darlington power output stage. The
regulator allows use of the device with supply voltages of 4.5 V to
28 V. On-chip compensation circuitry stabilizes switch-point performance over temperature. The magnetic operation of this device is
similar to that of the A3141E— Hall-effect switch.
The sensitive magnetic switch point coupled with the power output,
current limiting, and thermal limiting circuitry allow the UGQ5140K to
magnetically actuate various loads without requiring any external
components.
D
e
E
c
n
U
e
N fer
I
T
e
r
N
r
o
O
F
C
S —
I
D
Dwg. PH-001
Pinning is shown viewed from branded side.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC . . . . . . . . . . . . . . 28 V
Reverse Battery Voltage, VRCC . . . . . -45 V
Output OFF Voltage, VOUT . . . . . . . . . . 45 V
Over-Current Protected Output Voltage,
VOUT . . . . . . . . . . . . . . . . . . . . . . . . 25 V
Output ON Current, IOUT . . . . . . . 900 mA*
Magnetic Flux Density, B . . . . . . Unlimited
Package Power Dissipation,
PD . . . . . . . . . . . . . . . . . . . . See Graph
Operating Temperature Range,
TA . . . . . . . . . . . . . . . . . -40°C to +85°C
Storage Temperature Range,
TS . . . . . . . . . . . . . . . . -65°C to +150°C
* Output is current limited at approximately 900
mA and junction temperature limited if current in
excess of 900 mA is attempted. See Circuit
Description and Applications for further
information.
The UGQ5140K is rated for operation over an extended temperature range of -40°C to +85°C. It is supplied in a four-pin mini-SIP
plastic package, 0.200" (5.08 mm) wide, 0.130" (3.30 mm) high, and
0.060" (1.54 mm) thick.
FEATURES
■ Magnetically Actuated Power Switch
■ Temperature-Compensated Switch Points
■ High Current-Sink Capability
300 mA Continuous
900 mA Peak Current Limit
■ Output Short-Circuit Protection
■ Low Quiescent Standby Current
■ Linear Thermal Limiting
■ Automotive Temperature Range
-40°C to +85°C, Operating
■ Internal Inductive Flyback/Clamp Diode Protection
■ Reverse Battery Protection
■ Low-Profile 4-Pin Mini-SIP
Always order by complete part number: UGQ5140K .
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
ALLOWABLE PACKAGE POWER DISSIPATION IN WATTS
1 VCC
FUNCTIONAL BLOCK DIAGRAM
REV. BATTERY
PROTECTION
3 DIODE
REG.
X
OUTPUT
2
THERMAL
LIMIT
CURRENT
LIMIT
<<1Ω
4 GROUND
Dwg. FH-001
1.0
0.8
0.6
0.4
FREE AIR, RθJA = 177°C/W
0.2
0
-50
-25
25
0
50
75
100
125
150
AMBIENT TEMPERATURE IN °C
Dwg. GH-001
ELECTRICAL CHARACTERISTICS at TA = -40°C to +85°C, VCC = 4.5 V to 24 V
(unless otherwise noted).
Characteristic
Symbol
Test Conditions
Min.
Limits
Typ.
Max.
Units
Supply Voltage Range
VCC
Operating
4.5
12
24
V
Output Leakage Current
IOUT
VOUT = 24 V
—
<1.0
10
µA
Output Sustaining Voltage
VOUT(SUS)
IOUT = 100 mA
35
—
—
V
Output Saturation Voltage
VOUT(SAT)
IOUT = 300 mA, VCC = 24 V
—
0.84
1.2
V
VCC = VOUT = 12 V, B ≥ 500 G
—
900
—
mA
Over-Current Limit
ILIMIT
Output Rise Time
tr
VCC = 12 V, VBB = 18 V,
—
0.04
2.0
µs
Output Fall Time
tf
RL = 1.1 kΩ, CL = 20 pF
—
0.04
2.0
µs
Supply Current
ICC
Output OFF
—
5.5
10
mA
Diode Forward Voltage
VF
IF = 300 mA
—
1.1
1.5
V
Diode Leakage Current
IR
VR = 35 V
—
<1.0
50
µA
—
165
—
°C
Thermal Limit
VCC = VOUT = 12 V, B ≥ 500 G,
TLIMIT
IOUT = 10 mA
Typical Data is at TA = +25°C and is for design information only.
MAGNETIC CHARACTERISTICS at VCC = 4.5 V to 24 V.
TA = +25°C
Characteristic
TA = -40°C to +85°C
Symbol
Min.
Typ.
Max.
Min.
Typ.
Max.
Units
Magnetic Operate Point
BOP
70
155
200
45
—
240
G
Magnetic Release point
BRP
50
100
180
25
—
220
G
Hysteresis
Bhys
20
55
—
20
—
—
G
115 Northeast Cutoff, Box 15036
Worcester,
Massachusetts 01615-0036 (508) 853-5000
W
Copyright © 1991, 1995 Allegro MicroSystems, Inc.
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
TYPICAL OPERATING CHARACTERISTICS
1.0
1000
I OUT= 300 mA
SATURATION VOLTAGE IN VOLTS
PEAK CURRENT LIMIT IN mA
950
900
850
800
750
-40
-20
0
25
55
85
AMBIENT TEMPERATURE IN ° C
105
0.9
0.8
0.7
0.6
-40
125
-20
0
25
Dwg. GH-002A
Dwg. GH-004
180
85
55
AMBIENT TEMPERATURE IN ° C
9.0
I OUT= 10 mA
V CC = 12 V
160
SUPPLY CURRENT IN mA
SWITCH POINT IN GAUSS
8.0
OPERATE POINT
140
120
100
80
OUTPUT ON
I OUT= 10 mA
7.0
6.0
OUTPUT OFF
RELEASE POINT
-40
-20
0
25
AMBIENT TEMPERATURE IN °C
55
85
Dwg. GH-006A
5.0
-40
-20
0
25
AMBIENT TEMPERATURE IN °C
55
85
Dwg. GH-003A
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
TYPICAL TRANSFER CHARACTERISTICS
at TA = +25°C
The UGQ5140K merges state-of-the-art
Hall effect sensing and power driving technologies to allow precision non-contact
actuation of incandescent lamps or inductive
loads. It is rated for operation over an
extended temperature range as typically
required in automotive applications.
15
OUTPUT VOLTAGE IN VOLTS
12
VBB
B OP
9.0
MAGNETIC OPERATION
6.0
I OUT= 300 mA
3.0
B RP
0
CIRCUIT DESCRIPTION AND OPERATION
V OUT(SAT)
0
25
50
75
100
125
150
175
200
MAGNETIC FLUX DENSITY IN GAUSS
Dwg. GH-007
As shown in the Transfer Characteristics
graph, the output of the device (pin 2)
switches low when the magnetic field at the
Hall element exceeds the operate point
threshold (BOP). At this point, the output
voltage is VOUT(SAT). When the magnetic field
is reduced to below the release point threshold (BRP), the device output goes high. The
difference in the magnetic operate and
release points is called the hysteresis (B H) of
the part. This built-in hysteresis allows clean
switching of the output even in the presence
of external mechanical vibration and electrical noise.
CURRENT AND THERMAL
LIMITING
Output short circuits may be caused by
faulty connectors, crimped wiring harnesses,
or blown loads. In such cases, current and
thermal limit circuitry will protect the output
transistor against destruction.
Current through the output transistor is
sensed with a low-value on-chip aluminum
resistor. The voltage drop across this
resistor is fed back to control the base drive
of the output stage. This feedback prevents
the output transistor from exceeding its
maximum current density rating by limiting
the output current to approximately 900 mA.
It may also cause the output voltage to
increase (VOUT = VBB - [ILIMIT x RL]). In this
mode, the device will dissipate an increased
amount of power (PD = VOUT x ILIMIT) and the
output transistor will be thermally stressed.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
FIGURE 1
This stress, unless protected against (as in the
UGQ5140K), will cause the device junction temperature to rise until it fails catastrophically.
NOT TO SCALE
PEAK CURRENT LIMIT
OUTPUT CURRENT
When thermal stresses cause the junction temperature to reach approximately +165°C, a linear
thermal limiting circuit is activated. This circuit linearly
reduces the base drive of the output transistor to
maintain a constant junction temperature of 165°C. In
this mode, the output current will be a function of the
heat dissipating characteristics of the package and its
environment. Linear thermal limiting eliminates the
low-frequency thermal oscillation problems experienced by thermal shutdown (ON-OFF) schemes.
When the fault condition that caused the output
overload is corrected, the device returns to normal
operating mode.
JUNCTION
TEMP. LIMIT
TIME
Dwg. WH-002
FIGURE 2
OUTPUT VOLTAGE vs OUTPUT CURRENT
TJ < 150°C
OUTPUT VOLTAGE, V OUT
The output characteristics are shown in Figures 1
and 2. Note the three distinct operating regions: peak
limit, delta limit, and thermal limit. In practice the
output voltage and current may exhibit some oscillations during peak current limiting due to output load
characteristics. These oscillations are of very-short
duration (typically 50 ms) and may be damped with an
external capacitor between pins 2 and 4.
DELTA TEMP.
LIMIT
T
J
NOT TO SCALE
= 165°C
JUNCTION
TEMP. LIMIT
DELTA
TEMP. LIMIT
CURRENT LIMIT
Thermal stress protection is provided in two
manners; delta temperature protection, and junction
temperature protection. Under worst-case conditions
(see Figures 1 and 2), if the output is shorted to
supply, the output transistor will heat up much faster
than the rest of the integrated circuit. This condition
could cause localized failure in the output transistor.
To prevent damage, a delta temperature limiting
scheme is used. If a large thermal gradient is sensed
across the device, the output transistor base drive is
reduced to lower the output current. This reduces the
power (heat) generated by the output transistor.
OUTPUT CURRENT UNDER SHORT-CIRCUIT
CONDITIONS
V OUT(SAT)
OUTPUT CURRENT, I OUT
Dwg. GP-013-1
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
FIGURE 3
TYPICAL LAMP DRIVER APPLICATION
V
CC
1
2
3
4
OPTIONAL LAMP TEST
(SEE TEXT)
Dwg. EH-001
FIGURE 4
LAMP CURRENT vs TIME
NORMAL LAMP IN-RUSH CURRENT
INCANDESCENT LAMP DRIVER
High incandescent lamp turn-ON currents (commonly called in-rush currents) can contribute to poor lamp
reliability and destroy semiconductor lamp drivers. Warming resistors protect both driver and lamp but use significant power when the lamp is OFF while current-limiting
resistors waste power when the lamp is ON. Lamps with
steady-state current ratings to 300 mA can be driven by
the UGQ5140K (Figure 3) without the need for warming or
current limiting resistors. In applications using several
sensor IC/drivers to control multiple lamps, the internal clamp
diodes may be connected together to an appropriate
current-limiting resistor and simple “lamp test” switch.
X
+12 V
TYPICAL APPLICATIONS
As shown in Figure 4, when an incandescent lamp is
initially turned ON, the cold filament is at minimum resistance and will normally allow a 10x to12x peak in-rush
current. As the lamp warms up, the filament resistance
increases to its rated value and the lamp current is
reduced to its steady-state rating. When switching a lamp
with the UGQ5140K, the internal current-limiting circuitry
limits the peak current to approximately 900 mA. The
device will stay in the current limit and delta temperature
limit modes until the lamp resistance increases to its rated
steady-state value (Figure 4). A side-effect of this currentlimiting feature is that lamp turn-on times will increase.
Typical lamp turn-on times are shown in Figure 5.
INDUCTIVE LOAD DRIVER
NOT TO SCALE
CURRENT LIMIT
DELTA TEMP.
LIMIT
Connecting the internal clamp diode (pin 3) to the
positive supply allows relays or other inductive loads to be
driven directly, as shown in Figure 6. The internal diode
prevents damage to the output transistor by clamping the
high-voltage spikes which occur when turning OFF an
inductive load. An optional external Zener diode can be
used to increase the flyback voltage, providing a much
faster inductive load turn-OFF current decay, resulting in
faster dropout (reduced relay contact arcing), and improved performance. The maximum Zener voltage, plus
the load supply voltage, plus the clamp diode forward
voltage should not exceed 35 volts.
TIME
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
FIGURE 5
ELEMENT LOCATION
LAMP TURN-ON TIME
ACTIVE AREA DEPTH
0.0165"
0.42 mm
NOM
V BB = 14 V
125
0.121"
3.07 mm
0.053"
1.34 mm
#168 BULB
14 V, 350 mA
100
75
A
#194 BULB
14 V, 270 mA
BRANDED
SURFACE
50
25
-40
-20
0
25
55
AMBIENT TEMPERATURE IN ° C
1
2
3
4
85
Dwg. MH-001C
Dwg. GH-005A
FIGURE 6
TYPICAL RELAY/SOLENOID DRIVER APPLICATION
VBB + VZ + VF
+12 V
OUTPUT
VOLTAGE
X
V CC
1
2
3
4
V BB
V BB + VF
VOUT(SAT)
ZENER CLAMP
OUTPUT
CURRENT
APPROXIMATE LAMP TURN-ON TIME IN ms
150
DIODE CLAMP
Dwg. WP-001-1
OPTIONAL ZENER
Dwg. EH-002
Allegro
5140
PROTECTED POWERHALL®
SENSOR IC:
LAMP/SOLENOID DRIVER
Dimensions in Inches
Dimensions in Millimeters
(controlling dimensions)
(for reference only
5.28
5.16
0.208
0.203
0.063
0.059
45°
1.60
1.50
45°
3.51
3.38
0.138
0.133
45°
45°
0.085
MAX
1
2
3
0.033
4
2.16
MAX
0.0173
0.0138
0.600
0.560
1
2
3
0.84
4
0.44
0.35
15.24
14.23
SEE NOTE
SEE NOTE
0.0189
0.0142
0.48
0.36
0.050
BSC
1.27
BSC
Dwg. MH-009D in
Dwg. MH-009D mm
NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line).
2. Exact body and lead configuration at vendor’s option within limits shown.
3. Height does not include mold gate flash.
4. Recommended minimum PWB hole diameter to clear transition area is 0.035” (0.89 mm).
5. Where no tolerance is specified, dimension is nominal.
The products described herein are manufactured under one or more of the following U.S.
patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137;
5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other 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 appliances,
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 infringements of patents or
other rights of third parties that may result from its use.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000