Electronic Components Datasheet Search |
|
DRV8872 Datasheet(PDF) 8 Page - Texas Instruments |
|
DRV8872 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 25 page FORWARD REVERSE OUT1 OUT2 2 1 2 2 Forward drive Slow decay (brake) VM 1 OUT1 OUT2 2 1 2 2 Reverse drive Slow decay (brake) VM 1 3 3 High-Z (coast) 3 High-Z (coast) 3 8 DRV8872 SLVSCZ0B – AUGUST 2015 – REVISED JANUARY 2016 www.ti.com Product Folder Links: DRV8872 Submit Documentation Feedback Copyright © 2015–2016, Texas Instruments Incorporated 7.3 Feature Description 7.3.1 Bridge Control The DRV8872 output consists of four N-channel MOSFETs that are designed to drive high current. They are controlled by the two logic inputs IN1 and IN2, according to Table 1. Table 1. H-Bridge Control IN1 IN2 OUT1 OUT2 DESCRIPTION 0 0 High-Z High-Z Coast; H-bridge disabled to High-Z (sleep entered after 1 ms) 0 1 L H Reverse (current OUT2 → OUT1) 1 0 H L Forward (current OUT1 → OUT2) 1 1 L L Brake; low-side slow decay The inputs can be set to static voltages for 100% duty cycle drive, or they can be pulse-width modulated (PWM) for variable motor speed. When using PWM, it typically works best to switch between driving and braking. For example, to drive a motor forward with 50% of its max RPM, IN1 = 1 and IN2 = 0 during the driving period, and IN1 = 1 and IN2 = 1 during the other period. Alternatively, the coast mode (IN1 = 0, IN2 = 0) for fast current decay is also available. The input pins can be powered before VM is applied. Figure 4. H-Bridge Current Paths 7.3.2 Sleep Mode When IN1 and IN2 are both low for time tSLEEP (typically 1 ms), the DRV8872 enters a low-power sleep mode, where the outputs remain High-Z and the device uses IVMSLEEP (microamps) of current. If the device is powered up while both inputs are low, sleep mode is immediately entered. After IN1 or IN2 are high for at least 5 µs, the device will be operational 50 µs (tON) later. 7.3.3 Current Regulation The DRV8872 limits the output current based on the resistance of an external sense resistor on pin ISEN, according to this equation: |
Similar Part No. - DRV8872_16 |
|
Similar Description - DRV8872_16 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |