ZHCS517E April   2000  – June 2019 LM2587

PRODUCTION DATA.  

  1. 1 特性
  2. 2 典型 应用
  3. 3 说明
    1.     Device Images
      1.      反激式稳压器
  4. 4 修订历史记录
  5. 5 Pin Configurations
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESDRatings
    3. 6.3  Recommended Operating Ratings
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics: 3.3 V
    6. 6.6  Electrical Characteristics: 5 V
    7. 6.7  Electrical Characteristics: 12 V
    8. 6.8  Electrical Characteristics: Adjustable
    9. 6.9  Electrical Characteristics: All Output Voltage Versions
    10. 6.10 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Step-Up (Boost) Regulator Operation
  8. 8 Application And Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Typical Boost Regulator Applications
      2. 8.2.2 Typical Flyback Regulator Applications
        1. 8.2.2.1 Transformer Selection (T)
        2. 8.2.2.2 Transformer Footprints
          1. 8.2.2.2.0.1 T4
      3. 8.2.3 Design Requirements
      4. 8.2.4 Detailed Design Procedure
        1. 8.2.4.1 Custom Design With Webench® Tools
        2. 8.2.4.2 Programming Output Voltage (Selecting R1 And R2)
        3. 8.2.4.3 Short Circuit Condition
        4. 8.2.4.4 Flyback Regulator Input Capacitors
        5. 8.2.4.5 Switch Voltage Limits
        6. 8.2.4.6 Output Voltage Limitations
        7. 8.2.4.7 Noisy Input Line Condition)
        8. 8.2.4.8 Stability
    3. 8.3 Additional Application Examples
      1. 8.3.1 Test Circuits
  9. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
    3. 9.3 Heat Sink/Thermal Considerations
      1. 9.3.1 European Magnetic Vendor Contacts
      2. 9.3.2 Coilcraft
      3. 9.3.3 Pulse Engineering
  10. 10器件和文档支持
    1. 10.1 器件支持
      1. 10.1.1 第三方产品免责声明
      2. 10.1.2 开发支持
        1. 10.1.2.1 使用 Webench® 工具创建定制设计方案
    2. 10.2 接收文档更新通知
    3. 10.3 社区资源
    4. 10.4 商标
    5. 10.5 静电放电警告
    6. 10.6 Glossary
  11. 11机械、封装和可订购信息

封装选项

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

8.2.2.1 Transformer Selection (T)

lists the standard transformers available for flyback regulator applications. Included in the table are the turns ratio(s) for each transformer, as well as the output voltages, input voltage ranges, and the maximum load currents for each circuit.

Table 1. Transformer Selection Table

Applications      Figure 24  Figure 25  Figure 26  Figure 27
Transformers T1 T1 T1 T2 T3 T4
VIN 4V–6V 4V–6V 8V–16V 4V–6V 18V–36V 18V–36V
VOUT1 3.3V 5V 12V 12V 12V 5V
IOUT1 (Max) 1.8A 1.4A 1.2A 0.3A 1A 2.5A
N1 1 1 1 2.5 0.8 0.35
VOUT2 −12V −12V 12V
IOUT2 (Max) 0.3A 1A 0.5A
N2 2.5 0.8 0.8
VOUT3 −12V
IOUT3 (Max) 0.5A
N3 0.8

Table 2. Transformer Manufacturer Guide

Transformer Type Manufacturers' Part Numbers
Coilcraft
(1) 		Coilcraft
(1)
Surface Mount		 Pulse
(2)
Surface Mount		 Pulse
(2) 		Renco
(3) 		Schott
(4)
T5 Q4338-B Q4437-B PE-68413 — RL-5532 67140890
T6 Q4339-B Q4438-B PE-68414 — RL-5533 67140900
T7 S6000-A S6057-A — PE-68482 RL-5751 26606
(1) Coilcraft Inc. Phone: (800) 322-2645 www.coilcraft.com
(2) Pulse Engineering Inc. Phone: (619) 674-8100 www.digikey.com
(3) Renco Electronics Inc. Phone: (800) 645-5828 www.cdiweb.com/renco
(4) Schott Corp. Phone: (612) 475-1173 www.schottcorp.com/