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Transcript
NANJING AH ELECTRONIC CO., LTD AH58 AH59 AH68 COMPLEMENTARY OUTPUT HALL EFFECT SWITCHES These sensor are an integrated Hall sensor with output driver designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and complementary open-collector drivers for sinking large current loads. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.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 (high) and DOB turned on. FEATURES TYPICAL APPLICATIONS One chip hall sensor. 4.5V to 20V supply voltage. Dual-coil Brushless DC motor. 350mA (avg) output sink current. Dual-coil Brushless DC fan. Build in protection diode for chip reverse power connecting. Revolution Counting. 20˚ to 85˚ operating temperature.CC Low profile SIP-4L packages. ESD rating: 2000V (Human body model). ABSOLUTE MAXIMUM RATING Parameter Supply voltage Reverse VCC polarity voltage Magnetic flux density Continuous HoldOutput ON current Peak (start up) FG ON Current (continuous) Power dissipation Operation temperature Storage temperature Symbol Value Unit Vcc 24 V VRcc -24 V B Unlimited 350 500 600 20 500 -20 ~ 85 -50 ~ 150 G mA mA mA mA mW ˚C ˚C IO IF Pd Ta Tstg ELECTRICAL CHARACTERISTICS TA=25℃ Type and Value Parameter Symbol Test condition Unit min typ max 2.5 - 24 V Supply Voltage VCC Low supply voltage VCE VCC=4.5V Io=100mA -- 0.4 -- V Output saturation voltage VSAT Io=50mA -- 0.35 0.6 V Output leakage current IOL VCE=14V -- 0.1 10 μA Supply current ICC VCC=20V Output open -- 12 16 mA Switch time differential Δt RL=820Ω CL=20pF -- 3.0 10 μs 1 HALL IC NANJING AH ELECTRONIC CO., LTD MAGNET CHARACTERISTICS Ta=25 AH58 Parameter AH59 AH68 Symbol Unit min typ max min typ max min typ 8 max Operate Point BOP - - 20 15 mT Release Point BRP 2 - - -8 -15 mT Hysteresis BH 5 - - 4 5 mT NOTE: 1mT=10GS MAGNETIC-ELECTRICAL TRANSFER CHARACTERISTICS BLOCK DIAGRAM Vcc DO Temperature Compensation Regulator Vout1 Vout2 BH Hall Sensor Amplifer Schmitt Trigger Output Driver DOB BRP DIMENSIONS BH BOP BRP BB ( in: mm) TO-94 PACKAGE Sensor Location WEBSITE: WWW.AHEST.COM 2EMAIL: [email protected] 1. Vcc 2. Output 1 3. Output2 4. GND HALL IC BOP B
