 |
数据搜索系统，热门电子元器件搜索 |
|
|
数据搜索系统，热门电子元器件搜索 |
|
DRV8461SPWPR 数据表(PDF) 30 Page - Texas Instruments |
|
|
|||||||||||||||||||||||||||||
DRV8461SPWPR 数据表(HTML) 30 Page - Texas Instruments |
|
|
30 / 117 page  7.3.9 Current Regulation Decay Modes During PWM current chopping, the H-bridge is enabled to drive through the motor winding until the PWM current chopping threshold is reached. This is shown in Figure 7-11, Item 1. Once the chopping current threshold is reached, the H-bridge can operate in two different states, fast decay or slow decay. • In fast decay mode, as soon as the PWM chopping current level is reached, the H-bridge reverses state by switching on the opposite arm MOSFETs to allow the winding current to flow in the opposite direction. As the winding current approaches zero, the H-bridge is disabled to prevent further reverse current flow. Fast decay mode is shown in Figure 7-11, item 2. • In slow decay mode, the winding current is re-circulated by enabling both low-side MOSFETs in the H-bridge. This is shown in Figure 7-11, Item 3. xOUT1 xOUT2 1 2 Forward drive Slow decay VM 3 Fast decay (Reverse drive) 2 1 3 Slow decay Fast decay Mixed decay PWM ON PWM OFF TBLK ITRIP TDEG TFAST Figure 7-11. Decay Modes The decay mode is selected by the DECAY register or the DECAY0 and DECAY1 pins, as shown in Table 7-18. The decay modes can be changed on the fly. Table 7-18. Decay Mode Settings SPI Interface H/W Interface Decay Mode DECAY DECAY0 DECAY1 000b Hi-Z 1 Slow decay 100b 1 0 Mixed decay: 30% fast 101b Hi-Z 0 Mixed decay: 60% fast 110b 0 0 Smart tune Dynamic Decay 111b (default) 0 1 Smart tune Ripple Control Note The remaining settings of DECAY bit (001b, 010b, 011b) and the (DECAY0 = 1, DECAY1 = 1) setting are reserved. The DRV8461 also features the silent step decay mode for ultra-silent operation at low speed and standstill. See Section 7.3.11 for details. DRV8461 SLOSE98 – DECEMBER 2022 www.ti.com 30 Submit Document Feedback Copyright © 2022 Texas Instruments Incorporated Product Folder Links: DRV8461 |
|
链接网址 |
| ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 数据表链接 | 链接交换 | 制造商名单 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 |
Chinese ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
