Calculated Industries 3423 Spezifikationen

OVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSN12345678161514131211109ILEDPWMLM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JU

ISAGNDPWMStart new on timenDIMCOMPREFERENCECURRENTLIMITCSHHSN LOGICHSPENOVPHYSTERESISLED CURRENT LOWSRQUVLODDRVGATEPGNDOVPLRDYRPDENLatchOffTIMROVLOFLT

D=INOVV+OVD =INOVV -OVD =OVINVtiL (t)ÂiL-PPIL-MAXIL-MINIL0TStON = DTStOFF = (1-D)TSLM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REV

TTSWCR25fx=( )2OOINVVV25 -xxSWf=2INTTVCRxxfSW =25 x VIN - VORT x CT X VIN( )LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MA

ILED = RSNS1.24VRSNSVSNSRCSHRHSP= xVSNS = 1.24V x RCSHRHSPICSH =RHSPVSNSRSNSILEDRHSPRHSNHSNHSPHigh-Side Sense AmplifierCSH1.24VCCMPRCSHCOMPError Ampli

CSHRCSHLM3421/23VCCRBIASRMAXQ6Q7 RADJQ8RADJ Variable Current SourceVariable ResistanceVREFVO = 76V - VINVHSP < 76V VHSN > 3.5VLM3421, LM3421-Q1L

ILIM =245 mVRLIMLM3421/23ITPWMCOMPISRLIMQ1GATELEBPGND0.245V0.8VRDS-ON SensingRLIM SensingILED = (ICSH - IADD) xRHSPRSNS¸¹·¨©§RADJ x VREFIADD =RADJ + R

1P=Z1+DODCr x3=0UT=SNSCSHRR500VDxxxc620VDxc( )LIMLEDRID1xx+( )LIMHSPRRD1xx+x=¨¨©§+s1Z1P¸¸¹·0UTUT¨¨©§-s1Z1Z¸¸¹·LM3421/23VINENnDIMVINVORPDOVPEnableRUV2

RSNSILEDRHSPRHSNHSNHSPHigh-Side Sense AmplifierCSH1.24VCCMPRCSHCOMPError AmplifierVSNSTo PWMComparatorLM3421/23CFSRFSsets öP3ROsets öP2PHASE (°)FREQUE

VCMP0tVCCtCMPtCOt0.9VPHASE (°)FREQUENCY (Hz)GAIN (dB)806040200-20-40-60-8090450-45-90-135-180-225-2701e-1 1e1 1e3 1e5 1e7GAIN60° Phase MarginPHASEöP2ö

1¸¸¹·¨¨©§x=-OFFTURN24V.1V1OVR+2OVOVRR1.24V23 PALM3421/23ROV2ROV1VOOVLOOVPCOCMPVCCSUtttt++=OCOCtx=OVLEDICMPCMPCMPC36Ct xk:=x=PA250.9VBYPBYPVCCC168Ct x:

VCC1ENVINOVPRCTFLT DPOLDDRVHSPAGNDCOMPCSHDAPRPD234567891020191817161514131211nDIMTIMRLRDYPGNDGATEHSNIS21VINOVPRCTAGNDCOMPCSHnDIMVCC1ENDDRVHSPDAPRPD234

1.24V23 PALM3421/23RUV2RUV1VINUVLOnDIMRUVH(optional)LM3421/23OVPROV2ROV1LED+LED-2OVHYSORA23V xP=¸¸¹·¨¨©§x=-OFFTURN24V.1Vx+OV1OV2R5.0R1OVRLM3421, LM342

LM3421/23RUV2RUV1VINnDIMRUVHQDIMDDIMInverted PWMStandard PWMxPA23=HYSV¨¨©§+2UVR¸¸¹·1UVR(+x1UVR)2UVRUVHR2UVRA23xPHYSV=1¸¸¹·¨¨©§x=-ONTURN24V.1V1UVR+2UVU

RSNSLED+Q7Q6Q410VVIN5 k:LM3421/23500:DDRVVCC100 pFQ2100 nF10:tPULSE =2 x ILED x VO X L1VIN2LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVIS

TMRC=11.5FLTtxPAV1.24RSNSQ610V10 k:LM3421/23DDRVVCC100 pFQ2100 k:VODPOLRSNSLM3421/23DDRV100 nF100 k:Q210VLM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comS

LM3421/23VINFLTTIMRLRDYVINVSWHigh = LED in regulationLM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.com1. The EN pin is

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013In general, ΔiLED-PPis recommended by manufacturers to be less than 40

LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.comThe chosen input capacitors must also have the necessary RMS current r

VINVOL1D1Boost Inrush DiodeQ1LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013Figure 35. Boost Topology with Inrush Dio

OVPnDIMLM3421AGNDVINPGNDDDRVCODAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNQ2D1L1CINCBYPRLIMQ1CCMPRCSHRTROV2ROV1RUV2RUV112345678161514131211109RHSNRHSPILEDRSNS

COD1RLIMQ1ROV2ROV1ILEDRSNSRFSCFSCOVQ2D2L1Q5DIMDIMRPUOVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNCINCBYPCCMPRCSHRTRUV2RUV1123456781

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013PIN DESCRIPTIONS (continued)LM3423 LM3421 Name Description FunctionCon

COQ7D1ROV2ROV1ILEDRSNSRFSCFSCOVQ6Q5Q4D2VINVINDIMDIMRPURSERQ2OVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPRLIMQ1CCMPRCSHRTRUV2

D=INOVV+OVD =INOVV -OVD =OVINVrD = N x rLEDVO = N x VLEDLM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013Design GuideRe

IL-RMS = ILED x1 +112xILED'IL-PP¸¹·¨©§2L1=INDV xiüSWPP-Lfx301L=)ODVx-(INV SWPP-Lfüix1.24VRHSP=RRISNSCSHLEDxxSNSR =SNSVLEDIT25R =TSWCf x( )T25R=2O

x=¨¨©§+s1Z1P¸¸¹·0UTUT1LIMR=LIMI245 mV1-DMAXDMAXICO-RMS = ILED xIRMSCO=-12PP-LEDiüOC =SWPP-LEDDfüir xxLEDDI xOC =PPLi-'PPLEDDSWirf8-'xxxIL-RM

1Z1P),min( ZZ5x0UT2P=Z=0UT=SNSCSHRR500VDxxxc620VDxc( )LIMLEDRID1xx+( )LIMHSPRRD1xx+=0UT=SNSCSHRR500VDxxxc310VDxcLIMLEDRIxLIMHSPRR2xxSNS620VRR500V=xxCS

(1-DMID)DIILEDRMSCINxx=- MIDCIN ='VIN-PP x fSWILED x DCIN =8 x 'VIN-PP x fSW'iL-PPCIN =ILED x (1 - D) x D'VIN-PP x fSWx=0UTT-1¸¸¹·

VRD-MAX = VIN-MAXDSON2RMSTTRIPx=-IRMST=-DxILEDDcDIT-ILEDRMSx=IT-MAX = x ILED1 - DMAXDMAXIT-MAX = DMAX x ILEDOMAXINMAXTVVV +=--OV=MAXTV-

RUV1=1.24VVONTURN--R1.24VUV2xRUV2=A23 PVHYSROV1=R1.24VOV2xVm620VOFFTURN--ROV1=1.24VVOFFTURN--R1.24VOV2xROV2=VHYSOA23PFDDDVIPx=ID-MAX = ILEDID-MAX = (1

( )RR +x2UV1UVA23 P( )xHYSA23V xP- R2UVR1UVUVHR =LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.comMethod #2: If PWM dim

COD1ROV2ROV11AILEDRSNSRFSCFSCOVQ2VINVINOVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPRLIMQ1CCMPRCSHRTRUV2RUV112345678161514131

LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.comThese devices have limited built-in ESD protection. The leads should b

DMAX==677.0=V21V10V21 +VOVVIN-MINO+21V=21V + 70V= 0.231DMIN =VO + VIN-MAXVO533.0467.01D1'D=-=-=D==467.0=V21V24V21 +VOVVINO+:=:x=x=95.1m3256rNrLED

A89.11211IRMSL=+x=-IILEDRMSLx=-12112x+¸¸¹·¨¨©§DiPPLcx'-ILEDDc533.0mA6782x¸¸¹·¨¨©§A1x533.0A1PP-==LDVINxf1LSWxkHz015H33 xP467.0V42 xmA678='i==

secradk36===533.095.12x:H33467.0 PxDr2DcxL1Dx1ZZsecradk19===1.467F401.95:PxCOrDxD1+1PZ0.04:RLIM=:04.0===6.13AmV245mV245ILIMRLIM:=== 041.06ARLIMmV245mV

V91V21V70VVVOMAXINMAXT=+=+=--CIN = 4 x 4.7 PF xA1=ILEDIRMSIN-=1- 0.677677.01.45Ax1- DMAXDMAX=CIN==kHz504mV100 x467.0A1 xF27.9 P=f'vSWPPIN-xDILEDx

k:301R2UV=k:18.2R1UV=RUV1()RR1.24VUV2UV1+xVONTURN=-= V10.1=( )k130k18.21.24V :+:xk18.2 :VONTURN-:== k4.18--1.24VVONTURNx R1.24VUV2=RUV1:x k1301.24V-1.

ROV1 = 13.7 k:ROV2 = 432 k:=VOFFTURN=-V= 39.7ROV1k7.13 :( )k432k7.131.24V :+:x()RR1.24VOV2OV1+xVOFFTURN-0.5x0.5x:== k13.6--0.62VVOFFTURNx R1.24VOV2=RO

COD1ROV2ROV1RSNSRFSCFSCOV8V ± 28V1AILEDQ2OVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPRLIMQ1CCMPRCSHRTRUV2RUV1123456781615141

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #2 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

COD1Q1ROV2ROV12AILEDRSNSRFSCFSCOVQ5VIN10V ± 30VQ7Q6Q4D2VINDIMRPURSERDIMCBCFRFQ2OVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPR

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #3 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013Electrical Characteristics(1)Specifications in standard type face are

COD1ROV2ROV1RSNSRFSCFSCOV700 mAILEDRBIAS2RMAXQ7Q5 RADJQ4RCSHVCC18V ± 38VOVPnDIMLM3423AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPRLIMQ1CC

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #4 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

COD1ROV2ROV1500 mAILEDRSNSRFSCFSCOVQ5VIN10V ± 70VQ7Q6Q4D2VINDIMRPURSERDIMCBCFRFQ2Q1PWMOVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSN

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #5 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

RLIMQ1ROV1COV15V ± 50VPWMCOD1ROV21.25AILEDRSNSRFSCFSQ2D2L1Q4RPUCDIMOVPnDIMLM3423AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNCBYPCCMPRTRUV2RUV11

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #6 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

COD1ROV2ROV12.5AILEDRSNSRFSCFSCOVQ5VIN15V ± 60VQ1OVPnDIMLM3423AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNCBYPCCMPRTRUV2RUV11234567820191817161

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #7 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

COD1ROV2ROV1RSNSRFSCFSCOV9V ± 36V750 mAILEDQ2L2OVPnDIMLM3421AGNDVINPGNDDDRVDAPGATEENCOMPVINCSHRCTISHSPRPDVCCHSNL1CBYPRLIMQ1CCMPRCSHRTRUV2RUV1123456781

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013DESIGN #8 Bill of MaterialsQty Part ID Part Value Manufacturer Part Nu

LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.comElectrical Characteristics(1)(continued)Specifications in standard typ

LM3421, LM3421-Q1LM3423, LM3423-Q1SNVS574E –JULY 2008–REVISED MAY 2013www.ti.comREVISION HISTORYChanges from Revision D (May 2013) to Revision E Page•

PACKAGE OPTION ADDENDUMwww.ti.com2-May-2013Addendum-Page 1PACKAGING INFORMATIONOrderable Device Status(1)Package Type PackageDrawingPins PackageQtyEco

PACKAGE OPTION ADDENDUMwww.ti.com2-May-2013Addendum-Page 2Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconduc

TAPE AND REEL INFORMATION*All dimensions are nominalDevice PackageTypePackageDrawingPins SPQ ReelDiameter(mm)ReelWidthW1 (mm)A0(mm)B0(mm)K0(mm)P1(mm)W

*All dimensions are nominalDevice Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)LM3421MHX/NOPB HTSSOP PWP 16 2500 367.0 367.

MECHANICAL DATAPWP0020Awww.ti.comMXA20A (Rev C)

MECHANICAL DATAPWP0016Awww.ti.comMXA16A (Rev A)

IMPORTANT NOTICETexas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and otherch

LM3421, LM3421-Q1LM3423, LM3423-Q1www.ti.comSNVS574E –JULY 2008–REVISED MAY 2013Electrical Characteristics(1)(continued)Specifications in standard typ

ICSH (éA)ILED (A)1.00.80.60.40.20.00 20 40 60 80 100DUTY CYCLE (%)ILED (A)25 kHz1 kHz1008060402000.80.20.40.60.81.0VIN (V)ILED (A)1.0101.0051.0000.995

TEMPERATURE (°C)tON-MIN (ns)225220215210205200195-50 -14 22 58 94 130TEMPERATURE (°C)VRCT (mV)567566565564563562-50 -14 22 58 94 130TEMPERATURE (°C)VL