ZHCSHR6A March   2018  – January 2024 UCC27511A

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 Handling Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 VDD and Undervoltage Lockout
      2. 6.3.2 Operating Supply Current
      3. 6.3.3 Input Stage
      4. 6.3.4 Enable Function
      5. 6.3.5 Output Stage
      6. 6.3.6 Low Propagation Delays
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input-to-Output Logic
        2. 7.2.2.2 Input Threshold Type
        3. 7.2.2.3 VDD Bias Supply Voltage
        4. 7.2.2.4 Peak Source and Sink Currents
        5. 7.2.2.5 Enable and Disable Function
        6. 7.2.2.6 Propagation Delay
        7. 7.2.2.7 Thermal Information
        8. 7.2.2.8 Power Dissipation
      3. 7.2.3 Application Curves
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 第三方产品免责声明
    2. 10.2 接收文档更新通知
    3. 10.3 支持资源
    4. 10.4 Trademarks
    5. 10.5 静电放电警告
    6. 10.6 术语表
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

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6.1 Overview

The UCC27511A single-channel high-speed low-side gate-driver device is capable of effectively driving MOSFET and IGBT power switches. Using a design that inherently minimizes shoot-through current, the UCC27511A device is capable of sourcing and sinking high peak-current pulses into capacitive loads offering rail-to-rail drive capability and extremely small propagation delay of 13 ns (typical).

The UCC27511A device provides 4-A source, 8-A sink (asymmetrical drive) peak-drive current capability. Strong sink capability in asymmetrical drive boosts immunity against parasitic, Miller turnon effect. The UCC27511A device also features a unique split output configuration where the gate-drive current is sourced through the OUTH pin and sunk through the OUTL pin. This unique pin arrangement allows the user to apply independent turnon and turnoff resistors to the OUTH and OUTL pins (respectively) and easily control the switching slew rates.

Alternatively the OUTH and OUTL pins can be tied together, which results in a typical gate driver output configuration where the source and sink currents are delivered from the same pin. In case of UCC27511A device, the state of the device's output is simply determined by the combined states of the OUTH and OUTL pins when tied together. Output high implies that OUTH pin is pulled close to VDD pin bias voltage while OUTL pin is in high-impedance state. Similarly output low implies that OUTL pin is pulled close to the GND pin while OUTH pin is in high-impedance state. OUTH pulled to VDD, while OUTL pulled to GND pin simultaneously is not a valid state for the device.

The UCC27511A device is designed to operate over a wide VDD range of 4.5 to 18 V and wide temperature range of –40°C to 140°C. Internal undervoltage lockout (UVLO) circuitry on the VDD pin holds the output low outside VDD operating range. The capability to operate at low voltage levels, such as below 5 V, along with best-in-class switching characteristics, is especially suited for driving emerging wide band-gap power-switching devices such as GaN power-semiconductor devices.

The UCC27511A device features a dual-input design which offers flexibility of implementing both inverting (IN– pin) and non-inverting (IN+ pin) configuration with the same device. Either the IN+ or IN– pin can be used to control the state of the driver output. The unused input pin can be used for enable and disable functions. For system robustness, internal pullup and pulldown resistors on the input pins ensure that outputs are held low when the input pins are in floating condition. Therefore the unused input pin is not left floating and must be properly biased to ensure that driver output is in enabled for normal operation.

The input pin threshold of the UCC27511A device is based on TTL and CMOS-compatible low-voltage logic which is fixed and independent of the VDD supply voltage. Wide hysteresis between the high and low thresholds offers excellent noise immunity.

Table 6-1 UCC27511A Device Summary
PART NUMBER PACKAGE PEAK CURRENT (SOURCE, SINK) INPUT THRESHOLD LOGIC
UCC27511ADBV SOT-23, 6 pin 4-A, 8-A
(Asymmetrical Drive)		 CMOS/TTL-Compatible
(low voltage, independent of VDD bias voltage)
Table 6-2 UCC27511A Features and Benefits
FEATUREBENEFIT
High source and sink current capability
4 A and 8 A (Asymmetrical) – UCC27511A device		High current capability offers flexibility in employing UCC2751x family of devices to drive a variety of power switching devices at varying speeds
best-in-class 13-ns (typ) propagation delayExtremely low pulse-transmission distortion
Expanded VDD Operating range of 4.5 V to 18 VFlexibility in system design
Low VDD operation ensures compatibility with emerging wide band-gap power devices such as GaN
Expanded operating temperature range of –40°C to 140°C
(See the Section 5.5 table)
VDD UVLO ProtectionOutputs are held low in UVLO condition, which ensures predictable glitch-free operation at power up and power down
Outputs held low when input pins (INx) in floating conditionEnables the device to pass abnormal-condition system tests and delivers robust operation
Input pin voltage thresholds are independent of VDD. Input pins can withstand voltages greater than VDD.System simplification, especially related to auxiliary bias supply architecture
Split output structure in the UCC27511A device (OUTH, OUTL)Allows independent optimization of turnon and turnoff speeds
Strong sink current (8 A) and low pulldown impedance (0.375 Ω) in the UCC27511A deviceHigh immunity to C x dV/dt Miller turnon events
CMOS/TTL compatible input-threshold logic with wide hysteresis in the UCC27511A deviceEnhanced noise immunity, while retaining compatibility with microcontroller logic-level input signals (3.3 V, 5 V) optimized for digital power