ZHCSDA8E January 2015 – May 2018 DRV10975
PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 說明 （續）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 Motor Parameters
- 8.4.2 Starting the Motor Under Different Initial Conditions
- 8.4.3 Motor Start Sequence
- 8.4.4 Start-Up Current Setting
- 8.4.5 Closed Loop
- 8.4.6 Current Limit
- 8.4.7 Lock Detect and Fault Handling
- 8.4.8 AVS Function
- 8.4.9 PWM Output
- 8.4.10 FG Customized Configuration
- 8.4.11
Diagnostics and Visibility
- 8.4.11.1 Motor Status Readback
- 8.4.11.2 Motor Speed Readback
- 8.4.11.3 Motor Electrical Period Readback
- 8.4.11.4 BEMF Constant Readback
- 8.4.11.5 Motor Estimated Position by IPD
- 8.4.11.6 Supply Voltage Readback
- 8.4.11.7 Speed Command Readback
- 8.4.11.8 Speed Command Buffer Readback
- 8.4.11.9 Fault Diagnostics
- 8.5 Register Maps
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
封裝選項
機械數據 (封裝 | 引腳)
散熱焊盤機械數據 (封裝 | 引腳)
- PWP|24
訂購信息
8.3.1.1 Step-Down Regulator
The DRV10975 includes a hysteretic step-down voltage regulator that can be operated as either a switching buck regulator using an external inductor or as a linear regulator using an external resistor (see Figure 3). The best efficiency is achieved when the step-down regulator is in buck mode. However, the DRV10975Z device (sleep mode version) only operates with the step-down regulator in linear mode and with a Zener diode as described in the Typical Application section. The regulator output voltage can be configured by register bit VregSel. When VregSel = 0, the regulator output voltage is 5 V, and when VregSel = 1, the regulator output voltage is 3.3 V. When the regulated voltage drops by the hysteresis level, the high-side FET turns on to increase the regulated voltage back to the target of 3.3 V or 5 V. The switching frequency of the hysteretic regulator is not constant and changes with the load.
If the step-down regulator is configured in buck mode, see IREG_MAX in the Electrical Characteristics to determine the amount of current provided for external load. If the step-down regulator is configured as linear mode, it is used for the device internal circuit only.
NOTE
The DRV10975Z step-down regulator only operates in linear mode (using an external resistor) and with a Zener diode as described in the Typical Application section. The DRV10975Z device does not support buck mode (using an external inductor) as shown in Figure 3.
| Step-Down Regulator With External Inductor (Buck Mode) | Step-Down Regulator With External Resistor (Linear Mode) |