MA277H MPOWER | Alldatasheet

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Technical content

Complementary Output Hall Effect Fan Driver  GENERAL DESCRIPTION MA277H are integrated Hall sensors with output drivers, mainly designed for electronic commutation of brush-less DC Fan. This IC is using HV BCD process internally includes the regulator, pro tecting diode, Hall plate, amplifier, comparator, and a pair of complementary open-Drain outputs (DO, DOB). While the magnetic flux density (B) is larger than operate point (Bop), DO will turn on (low), and meanwhile DOB will turn off (high). Each output is latched until B is lower than release point (Brp), and then DO, DOB transfer each state. For DC fan application, sometimes need to test power reverse connection condition. Internal diode only protects chip-side but not for coil -side. If necessary, add o ne external diode to block the reverse current from coil-side.  FEATURES - On-chip Hall effect sensor with two different sensitivity and hysteresis settings - Wide operating voltage range: 4.0V~20V - Output sink current up to 0.4A - -40°C to 85°C operating temperature - Low Profile SIP-4L Packages( Green and Lead Free )  BLOCK DIAGRAM Hall Plate Control Logic Regulator Protection VDD DOB DO Amp. GND Thermal shutdown

 PIN ASSIGNMENT The package of MA277H is SIP-4L; the pin assignment is given by:  ORDER / MARKING INFORMATION Order Information Top Marking Package Type MA277H Packing XX X P4: SIP-4L Blank: BAG A : Taping Y Y WW X 277H Part number ID code: internal WW:01~52 Year:19= 2019  ABSOLUTE MAXIMUM RATINGS (at TA=25°C) Characteristics Symbol Rating Unit Supply Voltage VCC 20 V Magnetic Flux Density B Unlimited Gauss Output Current Continuous IO 400 mA Hold 500 Peak (start up) 700 Power Dissipation PD 550 mW Storage Temperature Range TSTG -65 to +150 °C Thermal Resistance from Junction to case θJC 49 °C/W Thermal Resistance from Junction to ambient θJA 227 °C/W Junction Temperature TJ 150 °C Ambient Temperature TA -40 to 85 °C ESD Susceptibility (HBM) 4000 V 1.10m m 1.9mm VDD DO DOB (Top View) SIP-4L GND (Sensor Location) Name Description VDD Supply Voltage DO Output 1 DOB Output 2 GND Ground.