ZHCSEI7B December   2015  – December 2017 CSD95377Q4M

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Powering CSD95377Q4M and Gate Drivers
      2. 7.3.2 Undervoltage Lockout (UVLO) Protection
      3. 7.3.3 PWM Pin
      4. 7.3.4 SKIP# Pin
        1. 7.3.4.1 Zero Crossing (ZX) Operation
      5. 7.3.5 Integrated Boost-Switch
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Application Curves
    3. 8.3 System Example
      1. 8.3.1 Power Loss Curves
      2. 8.3.2 Safe Operating Area (SOA) Curves
      3. 8.3.3 Normalized Curves
      4. 8.3.4 Calculating Power Loss and SOA
        1. 8.3.4.1 Design Example
        2. 8.3.4.2 Calculating Power Loss
        3. 8.3.4.3 Calculating SOA Adjustments
  9. 9 Layout
    1. 9.1 Layout Guidelines
      1. 9.1.1 Recommended PCB Design Overview
      2. 9.1.2 Electrical Performance
    2. 9.2 Layout Example
    3. 9.3 Thermal Considerations
  10. 10器件和文档支持
    1. 10.1 接收文档更新通知
    2. 10.2 社区资源
    3. 10.3 商标
    4. 10.4 静电放电警告
    5. 10.5 Glossary
  11. 11机械、封装和可订购信息
    1. 11.1 机械制图
    2. 11.2 建议印刷电路板 (PCB) 焊盘图案
    3. 11.3 建议模版开口

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • DPC|8
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3.4 SKIP# Pin

The SKIP# pin incorporates the input tri-state buffer as PWM. The function is somewhat different. When SKIP# is low, the zero crossing (ZX) detection comparator is enabled, and DCM operation occurs if the load current is less than the critical current. When SKIP# is high, the ZX comparator disables, and the converter enters FCCM mode. When both SKIP# and PWM are tri-stated, normal operation forces the gate driver outputs low and the driver enters a low-power state. In the low-power state, the UVLO comparator remains off to reduce quiescent current. When SKIP# is pulled low, the driver wakes up and is able to accept PWM pulses in less than 50 µs.

Table 1 shows the logic functions of UVLO, PWM, SKIP#, the control FET gate, and the sync FET gate.

Table 1. Logic Functions of the Driver IC

UVLO PWM SKIP# SYNC FET GATE CONTROL FET GATE MODE
Active — — Low Low Disabled
Inactive Low Low High(1) Low DCM(1)
Inactive Low High High Low FCCM
Inactive High H or L Low High
Inactive Tri-state H or L Low Low LQ(2)
Inactive — Tri-state Low Low ULQ(3)
(1) Until zero crossing protection occurs.
(2) Low-quiescent current (LQ).
(3) Ultra-low quiescent current (ULQ).