发那科伺服驱动维修说明A06B-6130-H002示教

1、CAT. No. U092Synchronous Rectification SystemVariable Output Voltage StepdownDC to DC Converter Power IC MD1422NApplication ManualSHINDENGEN ELECTRIC MFG. CO., LTD.1 Using the MD1422N DC to DC Converter Power ICThank you for purchasing the MD1422N DC to DC Converter Power IC. This manual contains im

2、portant information on the safe use of the MD1422N. Your safety is most important to our company. Please read these instructions carefully before using this device.The improper use of this device can result in serious injury or death.Expensive damage to this and other equipment can result. Failure t

3、o observe theCAUTION cautions in this Manual can also result in minor injuries and annoying equipment damage.CAUTIONThe MD1422N is intended for use with general electronic equipment (office automation, communication, measurement, household, etc.) It is not intended for use with equipment whose failu

4、re might result in the death or injury of those depending upon it (medical treatment, air navigation, railroad, cargo handling, nuclear power, etc.)If you intend to use the MD1422N with other than the general equipment listed above, please consult with our company.Under no conditions attempt to repa

5、ir or modify this device by yourself. Doing so can result in electric shock, equipment breakage, fire, and unreliable (and dangerous) equipment operation.Abnormal operating conditions may result in excessive voltage at the output terminal or excessive voltage drops elsewhere in the device. Take step

6、s to prevent load mishandling and breakage (overvoltage and overcurrent prevention) at the final point in the equipment chain.Overvoltage protectionThe MD1422N is not equipped with an overvoltage protection function. In the event excessive voltage appears within a module, the high input voltage may

7、remain together with a high output voltage even when the equipment is turned off. Smoke and flame may appear. To prevent this, be sure to install some sort of overvoltage protection circuitry before using the equipment.Before providing electrical power to the device, check that the polarity of the i

8、nput and output terminals is correct (check for misconnections). If circuit protection circuitry is cut off from the rest of the equipment, smoke and flames may appear.Be sure that input voltage level is maintained at the specified level. This may require the installation of a voltage regulator to t

9、he input line. Voltage fluctuations may result in the appearance of smoke and flames.If a breakdown or other abnormal condition occurs during equipment use, immediately stop power to the equipment. Contact our company at your earliest possible convenience. The information appearing in this Manual is

10、 the latest available at the time of publication. We reserve the right to make changes to the device without prior notice. Therefore, your device may differ slightly from that described in this Manual. Every effort has been made to make the information in this Manual accurate and reliable. However,

11、our company takes no responsibility for injuries or damage incurred when using the device as described in this Manual. Neither do we take responsibility for damages incurred as a result of patent or other defined rights. We do not give consent for a third person to use our patent or other rights bas

12、ed on this material. We do not guarantee these rights. No part of this material may be reproduced or copied without the specific written consent of our company. This device fully meets the reliability and quality control standards described in our companys catalog. If this device is to be used in a

13、situation where its misuse or failure might cause serious injury or death, consult with our company. Reliability and quality control standards for this device are considered adequate when it is used with the following types of end equipment. Computer - Office automation - Communication terminal - Me

14、asurement Machine tools - Audio-visual - Games and other amusements - Household appliance - Personal items - Industrial robot.Special applications where the device may or may not be suitable include the following.Transportation and conveyance (cargo loading) equipment- Primary communications equipme

15、nt- Traffic signal control equipment - Fire and burglary alarms - Various safety devices - Medical equipmentOther special applications where the device reliability is not considered high enough include the following.Atomic energy control systems - Aviation equipment- Aeronautics and space equipment

16、- Ocean depth sounding equipment - Life supportequipment Our company makes a constant effort to improve the quality and reliability of our products. However, it is the customers responsibility to provide safety. Take the appropriate steps to prevent personal injury, fire, and damage by providing red

17、undancy equipment, fire containment equipment, and devices to protect personnel and equipment from operational mistakes.1DC to DC Converter Power ICMD1422N Application Manual Table of ContentsCONTENTS1 .Using the MD1422N DC to DC Converter Power IC12 .General description of the DC to DC Converter Po

18、wer IC MD1422N32 - 1Features2 - 2Applications2 - 3Nomenclature2 - 4Peripheral functions2 - 5Terminal functions42 - 6Block diagrams53 .External dimensions (Diagram)64 .Characteristics75 .Mounting85 - 1Soldering pattern reference (Reflow-type)5 - 2Mounting cautions5 - 3Printed circuit board patterns a

19、nd design considerations (Reference) 96 .Operating instructions10,116 - 1 For use with output voltage lower than 5.3V6 - 2For use with output voltage higher than 5.3V12,136 - 3Remote ON/OFF Control Function146 - 4Input protection element connection156 - 5Overvoltage protection7 .Basic design procedu

20、re177 - 1Overcurrent detecting resistor (R2) selection7 - 2Inductance (L1) selection7 - 3Output capacitor selection187 - 4 Input capacitor selection7 - 5Thermal management8 .Electrical measurement data19288 - 1Output voltage - 2.5V8 - 2Output voltage - 3.3V8 - 3Output voltage - 5V8 - 4Output voltage

21、 - 9V8 - 5Output voltage - 12V9 .Packing conditions299 - 1Taping type9 - 2Package configuration9 - 3Order quantity and dimensions22 General description of the DC to DC Converter Power IC MD1422NThe MD1422N is a non-isolated step-down DC to DC converter power IC. Main components are the MOSFET switch

22、 and the built-in synchronous rectification MOSFET. Maximum output is 3A. The equipment is highly efficient and may be used for a wide range of applications.Output voltage is further adjustable using external resistances (2.5V - 12V). HSOP-type surface mount packaging is used. Minimal external contr

23、ol circuitry is required. This permits a small footprint and low profile of power supply.2 - 1Features Input voltage range: 840V Output voltage : Output voltage Adjustable using external resistances (2.5V - 12V) Maximum output current: 3A (Derating is required for output higher than 8V) Main switch

24、MOSFET and built-in synchronous rectification MOSFET Oscillation frequency: 250 kHz (Built-in oscillator does not require external capacitors or resistors) Overcurrent protection function Heat protection function Built-in low-voltage protection (UVLO) function Built-in remote control functions 2 - 2

25、Applications Information distribution equipment Telecommunications equipment Office automation equipment Factory automation equipment (Process control) Electronic measuring instruments Audio-video devices Home appliances 2 - 3NomenclatureDevice name and packaging specification codes are provided. Sh

26、ipping conditions are determined according to these specifications.Entry example: MD1422N 4072Specification code: Shows package configuration and product name 2 - 4Peripheral functions1 ) Internal reference voltage (Vref)IC internal circuitry reference voltage is provided by the temperature compensa

27、tion reference voltage (5.0V).This reference voltage (Vref) provides a maximum external output current measured at the terminal of 1 mA.2 ) Oscillation circuit (OSC)The oscillation circuit is built into the device. No external oscillation capacitor nor resistor is required. The oscillation frequency

28、 (250 kHz) is set internally and has a sawtooth wave pattern. The sawtooth wave pattern cannot be outputted externally.3 ) Error amplifier (Error Amp.)The error amplifier senses the DC to DC converter voltage and provides a PWM control signal output. Loop gain between the error amplifier ampOUT term

29、inal and the negative amp terminal is determined by the connections between the feedback resistor and the capacitor. This provides stable loop compensation throughout the system.4 ) Overcurrent sensor (OCL)The OCL is a pulse-by-pulse overcurrent sensor. The voltage drop across the external current s

30、ensing resistor is measured between the negative and positive terminals of the OCL. If the voltage drop exceeds 0.19V, the main switch (MOSFET) opens.3 2 - 5Terminal functionsS/S : 1OCL- : 2OCL+ : 3GND : 4R/C : 5Vcc : 6N/C : 7Vboot : 8VGL : 9N/C : 10VOUT : 11VOUT : 12VOUT : 13VOUT : 14N/C : 15P.GND

31、: 1632 : amp-31 : N/C30 : ampOUT29 : N/C28 : Vref27 : VTS26 : GND25 : VB24 : N/C23 : VGH22 : N/C21 : VDD20 : VDD19 : VDD18 : VDD17 : N/CTerminal No.Terminal symbolFunction1S SSoft-start capacitor terminal2OCL-Overcurrent detection terminal (-)3OCL+Overcurrent detection terminal (+)4,26GNDGround term

32、inal5R CRemote ON/OFF control terminal6VccControl circuit power supply terminal8VbootMain switch MOSFET control circuit power supply terminal9VGLLow side MOSFET gate terminal for synchronous rectification1114VOUTPower supply output terminal16P.GNDOutput circuit ground terminal1821VDDMain switch MOSF

33、ET power supply terminal23VGHMain switch high side MOSFET gate terminalOutput boot strap terminal.25VBUsed for connecting condenser across VB and VOUT terminals to boot strap ICinternal main switch MOSFET control circuit.27VTSTest terminal. Do not connect it to anything.28VrefInternal reference volt

34、age output terminal30ampOUTInternal error amplifier output terminal32amp-Internal error amplifier reversing input terminal7,10,15,17,22,N CNo connection terminal (N/C terminal)24,29,314 2 - 6Block diagramsVrefVccVboot2868R/CON/OFFSTART UPBOOT5START =7.2VCircuitReference=6.5VSTOP =6.7V100C150CReferen

35、ceTSD5.0V 5%Error ampPWM Comp+3V1V2.45VOSCf =250kHz3230amp-ampOUTVBVGHVDD25231821High SideVref=Vout+5.8VHigh SideUpper/lower MOSdriverSimultaneously OFFVOUT1114Upper/lower MOSPrevent simultaneous ONLow SideVref=6.5VQLow Sidedriver+RSCLM Vth=P.GND160.10.2V1234,269S/SOCLOCL+GNDVGL53 External dimension

36、s (Diagram)(SSOP-32)14.1MAX+13.6 -0.1Company Name 3217Type No.0.10.3+57.-9.95MD1422N+-5038N051.00-+2.00.4 +-0.2116Lot No.(0.8)0.35+-0.10.16 M0.80.10.2+-+-2.232.0.10.10+-10.Detail of A portion S = 15/1A PortionUnit : mm64 Characteristics1 ) Absolute maximum rating ( Ta=25 C )ItemSymbolRatingUnitLine

37、voltageVIN42VOutput MOS input voltageVDD42VOutput current (AVE)IOUTave3AOutput current (PEAK)IOUTpeak4AOCL-, OCL+ terminal voltageVOCL5.5VRemote control voltageVRC5.5VStorage temperatureTstg 40150CJunction temperatureTj150C4 ) Output current deleting for output2 ) Recommended operating conditionsIte

38、mRecommended valueUnitInput voltage840VOutput voltage setting range2.512VOperating temperature-1080C3 ) Electrical characteristics ( Ta=25 C )higher than 8VSet output voltageOutput current2.5V8V3A12V2.5AItemSymbolConditionsMINTYPMAXUnitHighsideMOSVdssID = 1mA,VGS = 0V42VDrain-source breakdown voltag

39、eHighsideMOSIdssVDS = 40V,VGS = 0V10ADrain interruption currentHighsideMOSRonID = 1.2A,VGS = 4.5V3370mDrain-source ON resistanceHighsideMOSVSDIS = 1.2A,VGS = 0V1.5VSource-drain Di forward voltageLowSideMOSVdssID = 1mA,VGS = 0V42VDrain-source breakdown voltageLowSideMOSIdssVDS = 40V,VGS = 0V10ADrain

40、interruption currentLowSideMOSRonID = 1.2A,VGS = 4.5V3370mDrain-source ON resistanceLowSideMOSVSDIS = 1.2A,VGS = 0V1.5VSource-drain breakdown voltageStart voltageVcc_start6.57.27.9VStop voltageVcc_stop6.06.77.4VStart-stop voltage hysteresisVcc_hys0.5VCurrent consumptionIccVcc = 8V40V1013mACurrent co

41、nsumption with remote control OFFIcc_offVcc = 8V40V1.21.5mAVoltage with remote control terminal ONVRC_onVcc = 8V40V0.20.5VVoltage with remote control terminal OFFVRC_offVcc = 8V40V2.55.3VCurrent with remote control terminals shortedIRCVcc = 8V40V250ABOOT terminal voltageVbootVcc = 24V5.46.57.6VInter

42、nal reference voltageVrefVcc = 8V40V4.7555.25VInternal oscillation frequencyfoscVcc = 24V212.5250287.5kHzOvercurrent threshold voltageVth_OCLVcc = 24V0.1620.190.218VSoftStart terminal currentIs/sVcc = 24V2012.55AErrorAmp reference voltageVampVcc = 8V40V2.42.452.5VOvercurrent protection operating tem

43、peratureT_TSD150C75 Mounting5 - 1Soldering pattern reference (Reflow-type)539.41.0.50.85 - 2Mounting cautions1 ) MountingVibrationandothermechanical101sdisturbancescanexertstressonthe240Cmaxinternal parts of the device.Carefully3010sexamine your equipment and place the2355Cdevice where vibration and other shock200 Cis minimal.te