CH411SR

Cosemitech (Shanghai) Co., Ltd. CH411 Industry Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemi-tech for the latest status Preliminary Specification 0.2 FEATURES and FUNCTIONAL DIAGRAM · · · · · · · · · PACKAGE Bipolar technology Reverse battery protection 3.5V to 30V Operation voltage -40 oC to 150 oC Superior temperature operation Open-collector 20 mA output Small Size SOT-23, SOT-89 or TO-92S Solid-state reliability Resistant to physical stress Activate with small, commercially available permanent magnets SOT-23 TO-92 SOT-89 APPLICATIONS - Brushless DC motor commutation - Automotive, Consumer and Industrial - Solid-state switch - Speed measurement - Revolution counting - Angular position detection - Magnetic Encoder DESCRIPTION The CH411 family is a Hall-effect latch designed in bipolar technology. The Hall IC internally includes an on-chip Hall voltage generator, a voltage regulator for operation with supply voltages of 3.5 to 30V, reverse protection diode, temperature compensation circuitry, small-signal amplifier, Schmitt trigger and an output driver; all in a single package. It is designed to respond to alternating North and South poles. While the magnetic flux density(B) is larger than operate point (Bop), the output will be turned on (Low), the output is held until the magnetic flux density(B) is lower than release point (Brp), then be turned off (High). Thanks to its wide operating voltage range 3.5 to 30V and extended temperature range from -40℃ to +150℃, it is quite suitable for use in automotive, industrial and consumer applications. The device is delivered in variety of packages to customers: SOT-23, SOT-89 for surface mount and TO-92S flat for through-hole mount. Both 3-lead packages are RoHS compliant. Page 1/10 Cosemitech (Shanghai) Co., Ltd. CH411 Industry Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemi-tech assumes no obligation for future manufacture of this product. Contact Cosemi-tech for the latest status Preliminary Specification 0.2 Table of Contents 1. Glossary of Terms ....................................................................................................................3 2. Product Family Members ..........................................................................................................3 3. Pin Definitions and Descriptions................................................................................................3 4. Absolute Maximum Ratings ......................................................................................................4 5. ESD protections .......................................................................................................................4 6. Function Description .................................................................................................................4 7. Definition of Switching Function ................................................................................................5 8. CH411 Series Parameters Specification ...................................................................................5 9. Test Conditions ........................................................................................................................6 10.Typical Application Circuit ........................................................................................................6 11.Typical Output Waveform .........................................................................................................6 12. Package Information ...............................................................................................................7 Page 2/10 Cosemitech (Shanghai) Co., Ltd. CH411 Industry Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemi-tech assumes no obligation for future manufacture of this product. Contact Cosemi-tech for the latest status Preliminary Specification 0.2 1. Glossary of Terms MilliTesla (mT), Gauss Units of magnetic flux density: 1mT = 10 Gauss RoHS Restriction of Hazardous Substances ESD Electro-Static Discharge BLDC Brush-Less Direct-Current Operating Point (BOP) Magnetic flux density applied on the branded side of the package which turns the output driver ON (VOUT = low) Release Point (BRP) Magnetic flux density applied on the branded side of the package which turns the output driver OFF (VOUT = high) 2. Product Family Members Part Number Marking ID CH411SR C411 CH411TB C411 CH411ER C411 Description Bipolar latching, Hall-effect digital sensor IC, SOT-23-3L package, tape and reel packing (3000 units per reel) Bipolar latching, Hall-effect digital sensor IC, flat, TO-92S package, bulk packing (1000 units per bag) Bipolar latching, Hall-effect digital sensor IC, SOT-89-3L package, tape and reel packing (1000 units per reel) 3. Pin Definitions and Descriptions SOT-23 (AT and ET) 1 TO-92S (A and A-T) 1 SOT-89 (BT) 1 2 3 3 3 2 2 SOT-23-3L Name Type VDD Supply Supply Voltage pin OUT Output Open Collector Output pin GND Ground Ground pin TO-92S Function SOT-89-3L Page 3/10 Cosemitech (Shanghai) Co., Ltd. CH411 Industry Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemi-tech assumes no obligation for future manufacture of this product. Contact Cosemi-tech for the latest status Preliminary Specification 0.2 4. Absolute Maximum Ratings Parameter Supply Voltage Reverse Voltage Supply Current Symbol VDD VRDD IDD Min - Max 40 -40 50 Units V V mA Output Voltage VOUT -0.3 40 V Output Current IOUT - 50 mA Operating Ambient temperature TA -40 150 °C Storage Temperature TS -50 150 °C Junction temperature TJ 165 °C Magnetic Flux No Limit Gauss Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum- rated conditions for extended periods may affect device reliability.ESD Protection 5. ESD protections Parameter All pins 1) Value Unit +/-2 kV 2) All pins +/-200 1) HBM (human body model, 100pF, 1.5 kohm ) according to MIL 883C, Method 3015.7 or EIA/JESD22A114-A 2) acc. Machine Model: C=200pF; R=0Ω V 6. Function Description The CH411 exhibits latch magnetic switching characteristics. Therefore, it requires both south and north poles to operate properly. The device behaves as a latch with symmetric operating and release switching points (BOP=|BRP|). This means magnetic fields with equivalent strength and opposite direction drive the output high and low. Removing the magnetic field (B→0) keeps the output in its previous state. This latching property defines the device as a magnetic memory. A magnetic hysteresis BHYST keeps BOP and BRP separated by a minimal value. This hysteresis prevents output oscillation near the switching point. 7. Temperature Characteristics Page 4/10 Cosemitech (Shanghai) Co., Ltd. CH411 Industry Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemi-tech assumes no obligation for future manufacture of this product. Contact Cosemi-tech for the latest status Preliminary Specification 0.2 8. Definition of Switching Function 9. CH411 Parameters Specification The voltages are referred to GND. 3.5V < VDD < 30V; TJ =-40 to 150°C, unless otherwise specified. Symbol Parameter Test Condition Min Supply voltage VDD Operating 3.5 Supply Current IDD BBOP Output Leakage Current IOFF B