MA280 MPOWER | Alldatasheet
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Technical content
Complementary Output Hall Effect Fan Driver GENERAL DESCRIPTION The MA280 is an integrated hall sensor with output drivers, mainly designed for electronic commutation of brush -less DC Fan. This IC is using HV BCD process internally includes the regulator, protecting 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 out put 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, a dd one 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 - Built-in FG Output - -40°C to 85°C Operating Temperature - Low Profile SOT23-6F Package ( Green and Lead Free ) BLOCK DIAGRAM Hall Plate Control Logic Regulator FG DOB DO Amp. GND Thermal shutdown
PIN ASSIGNMENT The package of MA280 is SOT23-6F; the pin assignment is given by: ORDER / MARKING INFORMATION Order Information Top Marking Package Type MA280 Packing A : Taping XX X CP: SOT23-6F Blank: BAG H Year : 8 = 2018 ID Code: Internalt Y W X Week: 01~26(A~Z) 27~52(a~z) ABSOLUTE MAXIMUM RATINGS (at TA=25°C) Characteristics Symbol Rating Unit Fan Supply Voltage VCC 20 V FG Voltage VFG 20 V FG Sink Current IFG 20 mA 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 ( Sensor Location ) (Top View) 1 2 3 DOBFG NC GND DO 1.1mm 0.8mm NC SOT23-6F Name Description FG Rotation speed output DO Output 1 DOB Output 2 GND Ground.