ZHCSKC0 October 2019 UCC21736-Q1
ADVANCE INFORMATION for pre-production products; subject to change without notice.
- 1 特性
- 2 應用
- 3 說明
- 4 修訂歷史記錄
- 5 Pin Configuration and Functions
-
6 Specifications
- 6.1 Absolute Maximum Ratings
- 6.2 ESD Ratings
- 6.3 Recommended Operating Conditions
- 6.4 Thermal Information
- 6.5 Power Ratings
- 6.6 Electrical Characteristics
- 6.7 Switching Characteristics
- 6.8 Insulation Specifications
- 6.9 Safety-Related Certifications
- 6.10 Safety Limiting Values
- 6.11 Insulation Characteristics Curves
- 6.12 Typical Characteristics
- 7 Parameter Measurement Information
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3
Feature Description
- 8.3.1 Power Supply
- 8.3.2 Driver Stage
- 8.3.3 VCC, VDD and VEE Undervoltage Lockout (UVLO)
- 8.3.4 Active Pulldown
- 8.3.5 Short Circuit Clamping
- 8.3.6 External Active Miller Clamp
- 8.3.7 Overcurrent and Short Circuit Protection
- 8.3.8 Fault (FLT, Reset and Enable (RST/EN)
- 8.3.9 ASC Protection and APWM Monitor
- 8.4 Device Functional Modes
-
9 Applications and Implementation
- 9.1 Application Information
- 9.2
Typical Application
- 9.2.1 Design Requirements
- 9.2.2
Detailed Design Procedure
- 9.2.2.1 Input filters for IN+, IN- and RST/EN
- 9.2.2.2 PWM Interlock of IN+ and IN-
- 9.2.2.3 FLT, RDY and RST/EN Pin Circuitry
- 9.2.2.4 RST/EN Pin Control
- 9.2.2.5 Turn on and turn off gate resistors
- 9.2.2.6 External Active Miller Clamp
- 9.2.2.7 Overcurrent and Short Circuit Protection
- 9.2.2.8 Higher Output Current Using an External Current Buffer
- 10Power Supply Recommendations
- 11Layout
- 12器件和文檔支持
- 13機械、封裝和可訂購信息
9.2.2.3 FLT, RDY and RST/EN Pin Circuitry
Both FLT and RDY pin are open-drain output. The RST/EN pin has 50kΩ internal pulldown resistor, so the driver is in OFF status if the RST/EN pin is not pulled up externally. A 5kΩ resistor can be used as pullup resistor for the FLT, RDY and RST/EN pins.
To improve the noise immunity due to the parasitic coupling and common mode noise, low pass filters can be added between the FLT, RDY and RST/EN pins and the microcontroller. A filter capacitor between 100pF to 300pF can be added.
Figure 46. FLT, RDY and RST/EN Pins Circuitry