SS5782 Unipolar Hall Switch Application Examples Features and Benefits – – – – – – – – – – – – – – Wide operating voltage range from 2.5V to 24V Medium sensitivity CMOS technology Chopper-stabilized amplifier stage Superior temperature stability Extremely low switchpoint drift Insensitive to physical stress Low current consumption Open drain output Tiny SOT23 3L or flat SIP 3L both RoHS Compliant packages Automotive, Consumer and Industrial Solid-state switch Interrupter Speed detection Linear position detection Angular position detection Proximity detection 3 pin SOT23 (suffix SO) 3 pin SIP (suffix UA) Functional Block Diagram VDD Voltage Regulatr OUT Chopper Hall Plate GND SIP Package Pin 1 – V DD Pin 2 – GND Pin 3 – OUT SOT Package Pin 1 – V DD Pin 2 – OUT Pin 3 – GND 1 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch General Description The SS5782 is a unipolar Hall effect sensor IC fabricated from mixed signal CMOS technology. The device integrates a voltage regulator, Hall sensor with dynamic offset cancellation system, Schmitt trigger and an open-drain output driver, all in a single package. listed above. It incorporates advanced chopper stabilization techniques to provide accurate and stable magnetic switch points. There are many applications for this HED – Hall Electronic Device - in addition to those The device is delivered in a Small Outline Transistor (SOT) for surface mount process or in a Plastic Single In Line (SIP flat) for through- hole mount. Both 3-lead packages are RoHS compliant. Thanks to its wide operating voltage range and extended choice of temperature range, it is quite suitable for use in automotive, industrial and consumer applications. Glossary of Terms MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances SOT Small Outline Transistor (SOT package) – also referred with the package code “SO” ESD Electro-Static Discharge BLDC Brush-Less Direct-Current Operating Point (B OP ) Magnetic flux density applied on the branded side of the package which turns the output driver ON (V OUT = V DSon ) Release Point (B RP ) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (V OUT = high) 2 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Pins Definition and Description SIP Pin № Name Type Function 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Drain Output pin 3 2 GND Ground Ground pin SOT Pin № Unique Features Based on mixed signal CMOS technology, SS5782 is a Hall-effect device with high magnetic sensitivity. This multi-purpose latch meets most of the application requirements. The chopper-stabilized amplifier uses switched capacitor technique to suppress the offset generally observed with Hall sensors and amplifiers. The CMOS technology makes this advanced technique possible and contributes to smaller chip size and lower current consumption than bipolar technology. The small chip size is also an important factor to minimize the effect of physical stress. This combination results in more stable magnetic characteristics and enables faster and more precise design. The wide operating voltage from 2.5V to 24V, low current consumption and large choice of operating temperature range according to “L”, “K”and “E” specifications make this device suitable for automotive, industrial and consumer applications. Absolute Maximum Ratings Parameter Symbol Value Units Supply Voltage VDD 28 V Supply Current IDD 50 mA Output Voltage VOUT 28 V Output Current IOUT 50 mA Storage Temperature Range TS Maximum Junction Temperature TJ -50 to 150 165 °C °C 3 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Symbol Operating Temperature Range Value Units Temperature Suffix “E” TA -40 to 85 °C Temperature Suffix “K” TA -40 to 125 °C Temperature Suffix “L” TA -40 to 150 °C Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolute-maximum- rated conditions for extended periods may affect device reliability. General Electrical Specifications DC Operating Parameters T A = 25℃, V DD = 2.5V to 24V (unless otherwise specified) Min Typ Parameter Symbol Test Conditions Supply Voltage VDD Operating Supply Current IDD B < B RP Output Saturation Voltage VDSon IOUT = 20mA, B > B OP Output Leakage Current IOFF B < B RP VOUT = 24V 1 Output Rise Time tr RL = 1kΩ, CL = 20pF 0.25 µs Output Fall Time tf RL = 1kΩ, CL = 20pF 0.25 µs Maximum Switching Frequency FSW --- 10 KHz Package Thermal Resistance RTH Single layer (1S) Jedec board 301 °C/W 2.2 Max Units 24 V 5 mA 0.5 V 10 µA Note: The output of SS5782 will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 2.5V. Magnetic Specifications DC Operating Parameters VDD = 2.5V to 24V (unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max -150 -120 -90 G -120 -80 -40 G Units Operating Point B OP Release Point B RP Hysteresis B HYS 30 40 50 G Operating Point B OP -160 -120 -85 G Release Point B RP -130 -80 -35 G Hysteresis B HYS 30 40 50 G Operating Point B OP -170 -120 -80 G Release Point B RP -140 -80 -30 G Hysteresis B HYS 30 40 50 G E spec., TA = 85°C K spec., TA = 125°C L spec., TA = 150°C 4 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Output Behaviour versus Magnetic Pole DC Operating Parameters TA = -40 C to 150 C, VDD = 2.5V to 24V (unless otherwise specified) Test Conditions Parameter Out North pole (TO) B> B OP Low South pole (SOT) B> B OP Low Null or weak magnetic field B= 0 or B < BRP High Table : Output behaviour versus magnetic pole Application Information It is strongly recommended that an external bypass capacitor be connected (in close proximity to the Hall sensor) between the supply(VDD Pin) and ground(GND Pin) of the device to reduce both external noise and noise generated by the chopper stabilization technique. As is shown in the two figures in next page, a 0.1μF capacitor is typical. For reverse voltage protection, it is recommended to connect a resistor or a diode in series with the VDD pin. When using a resistor, three points are important: - the resistor has to limit the reverse current to 50mA maximum (VCC / R1 ≤ 50mA) - the resulting device supply voltage VDD has to be higher than VDD min (VDD = VCC – R1*IDD) - the resistor has to withstand the power dissipated in reverse voltage condition (PD = V CC 2/R1) When using a diode, a reverse current cannot flow and the voltage drop is almost constant (≈0.7V). Therefore, a 100Ω/0.25W resistor for 5V application and a diode for higher supply voltage are recommended. Both solutions provide the required reverse voltage protection. When a weak power supply is used or when the device is intended to be used in noisy environment, it is recommended that figure 13.3 from the Application Information section is used. The low-pass filter formed by R1 and C1 and the Zener diode Z1 bypass the disturbances or voltage spikes occurring on the device supply voltage VDD. The diode D1 provides additional reverse voltage protection. Automotive and Severe Environment Protection Circuit Typical Three-Wire Application Circuit R1:100 C1 VDD SS5782 R2 C1 D1 OUT Z1 VDD R2 OUT SS5782 C2 C2 GND GND 5 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch ESD Precautions Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. 6 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Package Information Package UA, 3-Pin SIP(TO-92): 7 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Package SO, 3-Pin (SOT-23): Hall plate location Bottom View of SOT-23 Package 3 Chip 0.95 0.80 2 0.56 0.66 1 1.50 1.40 8 V2.00 May 1, 2012 SS5782 Unipolar Hall Switch Ordering Information Part No. Pb-free Temperature Code Package Code Packing SS5782ESOT YES -40°C to 85°C SOT-23 7-in. reel, 3000 pieces/reel SS5782EUA YES -40°C to 85°C TO-92 Bulk, 1000 pieces/bag SS5782KSOT YES -40°C to 125°C SOT-23 7-in. reel, 3000 pieces/reel SS5782KUA YES -40°C to 125°C TO-92 Bulk, 1000 pieces/bag SS5782LSOT YES -40°C to 150°C SOT-23 7-in. reel, 3000 pieces/reel SS5782LUA YES -40°C to 150°C TO-92 Bulk, 1000 pieces/bag 9 V2.00 May 1, 2012