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
7.3.1 External Active Miller Clamp
For gate driver application with unipolar bias supply or bipolar supply with small negative turn-off voltage, active miller clamp can help add an additional low impedance path to bypass the miller current and prevent the high dV/dt introduced unintentional turn-on through the miller capacitance. Different from the internal active miller clamp, external active miller clamp function is used for applications where the gate driver may not be close to the power device or power module due to system layout considerations. External active miller clamp function provide a 5V gate drive signal to turn-on the external miller clamp FET when the gate driver voltage is less than miller clamp threshold, VCLMPTH. Figure 31 shows the timing diagram for external active miller clamp function.
Figure 31. Timing Diagram for External Active Miller Clamp Function