ZHCSI91B November 2017 – July 2018 DRV8304
UNLESS OTHERWISE NOTED, this document contains PRODUCTION DATA.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
- 6 Specifications
-
7 Detailed Description
- 7.1 Overview
- 7.2 Functional Block Diagram
- 7.3
Feature Description
- 7.3.1 3-Phase Smart Gate Drivers
- 7.3.2 DVDD Linear Voltage Regulator
- 7.3.3 Pin Diagrams
- 7.3.4 Low-Side Current-Shunt Amplifiers
- 7.3.5 Gate-Driver Protection Circuits
- 7.4 Device Functional Modes
- 7.5 Programming
- 7.6
Register Maps
- Table 1. DRV8304S Register Map
- 7.6.1 Status Registers (DRV8304S Only)
- 7.6.2
Control Registers (DRV8304S Only)
- 7.6.2.1 Driver Control Register (Address = 0x02) [reset = 0x00]
- 7.6.2.2 Gate Drive HS Register (Address = 0x03) [reset = 0x377]
- 7.6.2.3 Gate Drive LS Register (Address = 0x04) [reset = 0x777]
- 7.6.2.4 OCP Control Register (Address = 0x05) [reset = 0x145]
- 7.6.2.5 CSA Control Register (Address = 0x06) [reset = 0x283]
- 8 Application and Implementation
- 9 Power Supply Recommendations
- 10Layout
- 11器件和文檔支持
- 12機械、封裝和可訂購信息
封裝選項
請參考 PDF 數據表獲取器件具體的封裝圖。
機械數據 (封裝 | 引腳)
- RHA|40
散熱焊盤機械數據 (封裝 | 引腳)
- RHA|40
訂購信息
8.2.1.2.4.1 Example
In this system example, the value of the VREF voltage is 3.3 V with a sense current from –20 to +20 A. The linear range of the SOx output is 0.25 V to VVREF – 0.25 V (from the VLINEAR specification). The differential range of the sense amplifier input is –0.3 to +0.3 V (VDIFF).
Therefore, the gain setting must be selected as 10 V/V or 20 V/V and the value of the sense resistor must be less than 10 mΩ to meet the power requirement for the sense resistor. For this example, the gain setting was selected as 10 V/V. The value of the resistor and worst case current can be verified that R < 10 mΩ and Imax = 20 A does not violate the differential range specification of the sense amplifier input (VSPxD).
Figure 46. Sense Amplifier Configuration