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3933


Part Number 3933
Manufacturer Allegro MicroSystems
Title THREE-PHASE POWER MOSFET CONTROLLER
Description Terminal 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Name PGND RESET GLC SC GHC CC GLB SB GHB CB GLA ...
Features AND BENEFITS I I I I I I I I I I I I I I Drives External N-Channel FETs Intelligent High-Side Gate Drive Selectable Coast or Dynamic Brake on Power Down Adjustable Dead Time for Cross-Conduction Protection Selectable Fast or Slow Current-Decay Modes Internal PWM Peak Current Control Reset/Coast Inpu...

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3932 : RESET. A logic input that enables the device, internally pulled up to LCAP. Logic HIGH will disable the device and turn off MOSFETs, coasting the motor. Logic LOW will enable gate drive to follow commutation logic. This input will override BRAKE. GLC/GLB/GLA. Low side gate drive outputs for external MOSFET drivers. External series gate resistors can be used to control slew rate seen at the power driver gate, thereby controlling the di/dt and dv/dt of S outputs. The outputs will source 1.25A for turn-on and sink 2.5A for gate discharge. SC/SB/SA. Directly connected to the motor terminals, these pins sense the voltages switched across the load. The pin is also connected to the negative side o.

3932S : .

3935 : . 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 2003 Allegro MicroSystems, Inc. 3935 THREE-PHASE POWER MOSFET CONTROLLER A3935KED (PLCC) A3935KLQ (SOIC) * Measured on “High-K” multi-layer PWB per JEDEC Standard JESD51-7. † Measured on typical two-sided PWB with power tabs (terminals 1, 2, 11, 12, 22, 23, 34, and 35) connected to copper foil with an area of 3.8 square inches (2452 mm2) on each side. See Application Note 29501.5, Improving Batwing Power Dissipation, for additional information. www.allegromicro.com 3 3935 THREE-PHASE POWER MOSFET CONTROLLER ELECTRICAL CHARACTERISTICS: unless otherwise noted at TJ = -40°C to +150°C, VB.

3938 : RESET. A logic input that enables the device. Has internal 50K pull-up to LCAP. RESET=1 will coast or brake the motor depending on the state of the BRKSEL pin. RESET=0 will enable gate drive to follow commutation logic. RESET = 1 will override the BRAKE pin. GLC/GLB/GLA. Low-side gate drive outputs for external MOSFET drivers. External series gate resistors can be used to control slew rate seen at the power driver gate, thereby, controlling the di/dt and dv/dt of S outputs. SC/SB/SA. Directly connected to the motor terminals, these pins sense the voltages switched across the load. The pins are also connected to the negative side of the bootstrap capacitors and the negative supply connectio.




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