a4936 Allegro MicroSystems, Inc., a4936 Datasheet
a4936
Related parts for a4936
a4936 Summary of contents
Page 1
... MOSFETs during current decay. The Hall elements can be inexpensive types, when used with noise filtering to prevent false commutation signals. The A4936 provides a regulated 7.5 V supply to power the three Hall elements. Continued on the next page… Typical Application Diagram ...
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... Special power-up sequencing is not required. Operating temperature range is –20°C to 105°C. Selection Guide Part Number A4936MET-T 73 pieces per tube A4936METTR-T 1500 pieces per reel ® *Contact Allegro for additional packing options Absolute Maximum Ratings Characteristic ...
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... A4936 Pin-out Diagram HA– GHA HB HB– GHB HC PAD HC– GHC FG GLA FGFB 7 18 GLB FG– GLC Terminal List Table Number Name 1 HA- 2 HB+ 3 HB- 4 HC+ 5 HC- 6 FG+ 7 FGFB 8 FG GND 11 HBIAS ...
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... A4936 ELECTRICAL CHARACTERISTICS Characteristics General Supply Voltage Range Motor Supply Current HBIAS HBIAS Current Limit Control Logic Logic Input Voltage Logic Input Current Input Pin Glitch Reject HBIAS Wake-up Delay, Standby Mode Gate Drive High-Side Gate Drive Output Low-Side Gate Drive Output ...
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... A4936 ELECTRICAL CHARACTERISTICS Characteristics FG FG Input Bias Current FG Input Offset Voltage FGS Output High Leakage FGS Output Low Voltage FG Amp Open Loop Gain FG Amp Bias Voltage FG Comparator Hysteresis 1 For input and output current specifications, negative current is defined as coming out of (sourcing) the specified device pin. ...
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... A4936 VBB V Charge Pump HBIAS Voltage STOP BRAKE VBB Charge Pump HBIAS Voltage 3-Phase Brushless DC Motor Pre-Driver Power-Up and Standby Mode Timing Diagram BBUV V CPUV Standby Mode (Turn-off Hall bias supply) Don’t Care Outputs Enabled Outputs Disabled Power-Down Timing Diagram ...
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... Standby mode. HBIAS Function This provides a power supply of 7.5 V, current-limited to 30 mA. This reference voltage is used to power the logic sections of the A4936 and also to power the external Hall elements. Charge Pump The internal charge pump is used to generate a supply above VBB to drive the high-side MOSFETs ...
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... When BRAKE is high, lock detection is disabled. It also is dis- abled if the PWM input remains low for the duration of the Hall input lock detection. FG Amplifier and Comparator A differential amplifier and a comparator are integrated into the A4936 to amplify and shape , or the FG signal from the FG coil underneath the motor. This coil lock ...
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... A4936 33X 0.08 C +0.05 0.25 –0.07 0.50±0. Copyright ©2010, Allegro MicroSystems, Inc. The products described here are manufactured under one or more U.S. patents or U.S. patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to per- mit improvements in the per for mance, reliability, or manufacturability of its products ...