LM7815中文资料之五兆芳芳创作目录1.lm7815介绍2.实际应用3.引脚序号、引脚功效4.lm7815应用电路5.7815电参数三端稳压集成电路lm7815.电子产品中，罕有的三端稳压集成电路有正电压输出的lm78 ××系列和负电压输出的lm79××系列.望文生义，三端IC是指这种稳压用的集成电路，只有三条引脚输出，辨别是输入端、接地端和输出端.它的样子象是普通的三极管，TO- 220 的尺度封装，也有lm9013样子的TO-92封装.1.lm7815介绍用lm78/lm79系列三端稳压IC来组成稳压电源所需的外围元件少少，电路内部还有过流、过热及调整管的庇护电路，使用起来可靠、便利，并且价钱廉价.该系列集成稳压IC型号中的lm78或lm79前面的数字代表该三端集成稳压电路的输出电压，如lm7806暗示输出电压为正6V，lm7909暗示输出电压为负9V.因为三端固定集成稳压电路的使用便利，电子制作中经常采取.最大输出电流，LM78XX系列输出电压辨别为5V;6V;8V;9V;10V;12V;15V;18V;24V.2.实际应用在实际应用中，应在三端集成稳压电路上装置足够大的散热器（当然小功率7815IC内部电路图.的条件下不必）.当稳压管温度太高时，稳压性能将变差，甚至损坏.当制作中需要一个能输出1.5A以上电流的稳压电源，通常采取几块三端稳压电路并联起来，使其最大输出电流为N个1.5A，但应用时需注意：并联使用的集成稳压电路应采取同一厂家、同一批号的产品，以包管参数的一致.另外在输出电流上留有一定的余量，以避免个体集成稳压电路失效时导致其他电路的连锁烧毁.在lm78 ** 、lm79 ** 系列三端稳压器中最常应用的是TO-220 和TO-202 两种封装.这两种封装的图形以及引脚序号、引脚功效如附图所示.图中的引脚号标注办法是依照引脚电位从高到底的顺序标注的.这样标注便于记忆.引脚①为最高电位，③脚为最低电位，②脚居中.从图中可以看出，不管正压仍是负压，②脚均为输出端.对于lm78**正压系列，输入是最高电位，自然是①脚，地端为最低电位，即③脚，如附图所示.对与lm79**负压系列，输入为最低电位，自然是③脚，而地端为最高电位，即①脚，如附图所示.3.引脚序号、引脚功效此外，还应注意，散热片总是和最低电位的第③脚相连.这样在lm78**系列中，散热片和地相连接，而在lm79**系列中，散热片却和输入端相连接.4.lm7815应用电路lm7815典型应用电路图:lm78XX系列集成稳压器的典型应用电路图，是一个输出正5V直流电lm7815稳压电路压的稳压电源电路.IC收集成稳压器lm7815，C1、C2辨别为输入端和输出端滤波电容，RL为负载电阻.当输出电流较大时，lm7815应配上散热板.为提高输出电压的应用电路.稳压二极管VD1串接在lm78XX稳压器2脚与地之间，可使输出电压Uo得到一定的提高，输出电压Uo为78XX稳压器输出电压与稳压二极管VC1稳压值之和.VD2是输出庇护二极管，一旦输出电压低于VD1稳压值时，VD2导通，将输出电流旁路，庇护lm7800稳压器输出级不被损坏.为输出电压可在一定规模内调节的应用电路.由于R1、RP电阻网络的作用，使得输出电压被提高，提高的幅度取决于RP与R1的比值.调节电位器RP，即可一定规模内调节输出电压.当RP=0时，输出电压Uo等于lm78XX稳压器输出电压；当RP逐步增大时，Uo也随之逐步提高.为扩大输出电流的应用电路.VT2为外接扩流率管，VT1为推动管，两者为达林顿连接.R1为偏置电阻.该电路最大输出电流取决于VT2的参数.5.7815电参数。
TOSHIBA Transistor Silicon NPN Triple Diffused Type2SC5198Power Amplifier Applications• High breakdown voltage: V CEO = 140 V (min) • Complementary to 2SA1941• Suitable for use in 70-W high fidelity audio amplifier’s output stageAbsolute Maximum Ratings (T a = 25°C)Characteristics Symbol Rating UnitCollector-base voltage V CBO 140 V Collector-emitter voltage V CEO 140 V Emitter-base voltage V EBO 5 V Collector current I C 10 A Base currentI B 1 A Collector power dissipation (T c = 25°C)P C 100 WJunction temperature T j 150 °C Storage temperature rangeT stg−55 to 150°CNote: Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the significant change in temperature, etc.) may cause this product to decrease in thereliability significantly even if the operating conditions (i.e. operating temperature/current/voltage, etc.) are within the absolute maximum ratings.Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook (“Handling Precautions”/"Derating Concept and Methods") and individual reliability data (i.e. reliability test report and estimated failure rate, etc).Unit: mmJEDEC― JEITA―TOSHIBA 2-16C1AWeight: 4.7 g (typ.)Electrical Characteristics (T a = 25°C)Characteristics Symbol Test Condition Min Typ. Max UnitCollector cut-off current I CBO V CB = 140 V, I E = 0 ― ― 5.0 μA Emitter cut-off currentI EBO V EB = 5 V, I C = 0 ― ― 5.0 μA Collector-emitter breakdown voltageV (BR) CEO I C = 50 mA, I B = 0 140 ―― Vh FE (1)(Note)V CE = 5 V, I C = 1 A 55 ― 160DC current gainh FE (2)V CE = 5 V, I C = 5 A 3583―Collector-emitter saturation voltage V CE (sat) I C = 7 A, I B = 0.7 A ― 0.3 2.0 V Base-emitter voltage V BE V CE = 5 V, I C = 5 A ― 0.9 1.5 V Transition frequency f T V CE = 5 V, I C = 1 A― 30 ― MHz Collector output capacitanceC obV CB = 10 V, I E = 0, f = 1 MHz― 170 ― pFNote: h FE (1) classification R: 55 to 110, O: 80 to 160MarkingindicatorNote 2 : A line under a Lot No. identifies the indication of product Labels.[[G]]/RoHS COMPATIBLE or [[G]]/RoHS [[Pb]]Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product.The RoHS is the Directive 2002/95/EC of the European Parliament and of the Council of 27 January 2003 on therestriction of the use of certain hazardous substances in electrical and electronic equipment.Collector current I C (A)C o l l e c t o r -e m i t t e r s a t u r a t i o nv o l t ag e VC E (s a t ) (V )V CE (sat) – I CCollector-emitter voltage V CE (V)I C – V CEC o l l e c t o rc u r r e n t IC (A )I C – V BECollector current I C (A)h FE– I CD C c u r r en t g a i n h F EBase-emitter voltage V BE (V)Co l le c t o r c ur r e n t I C (A )Collector-emitter voltage V CE (V)C o l l e c t o r c u r r e n t I C (A )Safe Operating Area0.1 1 0.011023010 30 100 300I max (pulsed)*3RESTRICTIONS ON PRODUCT USE•Toshiba Corporation, and its subsidiaries and affiliates (collectively “TOSHIBA”), reserve the right to make changes to the information in this document, and related hardware, software and systems (collectively “Product”) without notice.•This document and any information herein may not be reproduced without prior written permission from TOSHIBA. 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