JAJS827E April   2000  – June 2019 LM2587

PRODUCTION DATA.  

  1. 1 特長
  2. 2 代表的なアプリケーション
  3. 3 概要
    1.     Device Images
      1.      フライバック・レギュレータ
  4. 4 改訂履歴
  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デバイスおよびドキュメントのサポート
    1. 10.1 デバイス・サポート
      1. 10.1.1 デベロッパー・ネットワークの製品に関する免責事項
      2. 10.1.2 開発サポート
        1. 10.1.2.1 Webench® ツールによるカスタム設計
    2. 10.2 ドキュメントの更新通知を受け取る方法
    3. 10.3 コミュニティ・リソース
    4. 10.4 商標
    5. 10.5 静電気放電に関する注意事項
    6. 10.6 Glossary
  11. 11メカニカル、パッケージ、および注文情報

パッケージ・オプション

メカニカル・データ（パッケージ｜ピン）
サーマルパッド・メカニカル・データ
発注情報

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/