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MP6510 Datasheet(PDF) 10 Page - Monolithic Power Systems |
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MP6510 Datasheet(HTML) 10 Page - Monolithic Power Systems |
10 / 11 page MP6510 —4.5V-TO-16V, 1.2A, SINGLE-PHASE, BRUSHLESS DC MOTOR DRIVER MP6510 Rev.1.01 www.MonolithicPower.com 10 1/16/2018 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. APPLICATION INFORMATION Selecting the Input Capacitor The input capacitor absorbs excess armature inductor energy with every commutation. For typical applications, select CIN≥10µF to provide a margin of safety for input OVP. Motors with larger armature inductors require larger input capacitors. Setting the Frequency For most applications, use a 100pF capacitor for the CP capacitor to set the frequency to 30kHz. fCOSC is determined by: 6 OSC P f 3 10 / C (Hz) Connecting the Motor Figure 3 shows that the OUT1 and OUT2 connectors connect to the motor armature. When VIN+ exceeds VIN-, SW1 and SW4 activate and current flows from OUT1 to OUT2. When VIN- exceeds VIN+, SW2 and SW3 activate and current flows from OUT2 to OUT1. The opposing current directions generate opposing polarities in the armature winding. For most applications, carefully connect OUT1 and OUT2 to the motor terminators according to the Hall sensor setting position. Incorrect connections will cause abnormal motor function. M B rus hles s DC Motor SW1 SW2 SW4 SW3 V c c OUT 1 OUT2 Figure 3: Power Stage DESIGN EXAMPLE Below is an example design that follows the application guidelines for the given specifications: VIN 4.5V to 16V IOUT(Max) 1.2A fCOSC 30kHz Figure 4 shows a detailed application schematic. For more applications, please refer to the related Evaluation Board Data Sheets. P-GND OUT2 VCC RMI VTH COSC FG RD OUT1 CT VREF IN- HB IN+ VIN Hall Motor P-GND S-GND CIN 10uF D1 B130LAW-7-F CP=100pF MP6510 GND R7 0O R5 10kO VIN D2 B130LAW-7-F R8 1kO VTH R6 10kO CT=1µF Figure 4: Detailed Application Schematic |
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