PDF 5140 Data sheet ( Hoja de datos )

Número de pieza	5140
Descripción	PROTECTED POWERHALL SENSOR LAMP/SOLENOID DRIVER
Fabricantes	Allegro MicroSystems
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No Preview Available ! 5140 PROTECTED POWERHALL® SENSOR: LAMP/SOLENOID DRIVER X V CC 1 23 4 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. 5140 PROTECTED POWERHALL® SENSOR — 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 con- tinuously 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 con- junction with inexpensive magnets or in applications that require relatively large operating distances. Each sensor/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 perfor- mance 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. The UGQ5140K is rated for operation over an extended tempera- ture 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 s Magnetically Actuated Power Switch s Temperature-Compensated Switch Points s High Current-Sink Capability 300 mA Continuous 900 mA Peak Current Limit s Output Short-Circuit Protection s Low Quiescent Standby Current s Linear Thermal Limiting s Automotive Temperature Range -40°C to +85°C, Operating s Internal Inductive Flyback/Clamp Diode Protection s Reverse Battery Protection s Low-Profile 4-Pin Mini-SIP Always order by complete part number: UGQ5140K . 1 page 5140 PROTECTED POWERHALL® SENSOR: LAMP/SOLENOID DRIVER This stress, unless protected against (as in the UGQ5140K), will cause the device junction tempera- ture to rise until it fails catastrophically. 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. When thermal stresses cause the junction tem- perature 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 experi- enced by thermal shutdown (ON-OFF) schemes. 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 oscilla- tions 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. When the fault condition that caused the output overload is corrected, the device returns to normal operating mode. FIGURE 1 OUTPUT CURRENT UNDER SHORT-CIRCUIT CONDITIONS NOT TO SCALE PEAK CURRENT LIMIT DELTA TEMP. LIMIT JUNCTION TEMP. LIMIT TIME Dwg. WH-002 FIGURE 2 OUTPUT VOLTAGE vs OUTPUT CURRENT TJ < 150°C NOT TO SCALE T = 165°C J JUNCTION TEMP. LIMIT DELTA TEMP. LIMIT V OUT(SAT) OUTPUT CURRENT, I OUT Dwg. GP-013-1 5 Page

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