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ATS278Z-PL-B Datasheet(PDF) 1 Page - Anachip Corp |
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ATS278Z-PL-B Datasheet(HTML) 1 Page - Anachip Corp |
1 / 6 page ATS278 Two Phase Hall Effect Latch With FG Output This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Rev. 1.0 Oct 4, 2005 1/6 Features - On-chip Hall plate - Operating voltage: 3.5V~20V - Internal bandgap regulator allows temperature compensated operations and a wide operating voltage range - High output sinking capability up to 400mA for driving large load - Built-in protection diode only for chip reverse power connecting - Frequency Generation (FG) output - Package: SIP-5L Applications - Dual-coil Brush-less DC Motor - Dual-coil Brush-less DC Fan - Revolution Counting - Speed Measurement General Description ATS278 is an integrated Hall sensor with two output drivers and rotor speed output, typically designed for electronic commutation of two-phase brush-less DC fan applications. On-chip Hall sensor will generate Hall voltage due to magnetics sensing. The amplifier will amplify the Hall voltage. The Schmitt trigger determines switching hysteresis and then control internal driver’s on/off to sink load current. Meanwhile, An internal bandgap regulator is used to provide stable bais due to temperature-compensation. FG pin will provide switching frequency of driver. Major feature is to minimize the external components by building-in FG output transistor. If a magnetic flux density larger than threshold Bop, DO is turned on (low) and DOB is turned off (high). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off and DOB turned on. Ordering Information ATS278 X - X X - X P: SIP-5L Package Lead L : Lead Free Wafer Body Magnetic Characteristics Blank or A~Z : if necessary to specify A or B *Packing: Bulk Typical Application Circuit 278 1 5 4 3 2 5V/12V Coil1 Coil2 Rpu C1 + Speed R1 R2 C1 C2 R1 = R2 = 47Ω μ C1 = C2 = 2.2 F The R, C value need to be fine tuned base on coils design. 5V/12V DC Brush-less Fan with FG output function |
Similar Part No. - ATS278Z-PL-B |
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Similar Description - ATS278Z-PL-B |
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