LTC4368 (Rev. A) - analog.com

1 LTC43681 Rev AFor more information APPLICATION FEATURESDESCRIPTION100V UV/OV and Reverse Protection Controller with Bidirectional Circuit Breaker24V Application with 10A Circuit BreakerAPPLICATIONS nWide Operating Voltage Range: to 60V nOvervoltage Protection to 100V nReverse Supply Protection to 40V nBidirectional Electronic Circuit Breaker: n+50mV Forward Sense Threshold n 50mV Reverse ( LTC4368 -1) n 3mV Reverse ( LTC4368 -2) nAdjustable Undervoltage and Overvoltage Thresholds nLow Operating Current: 80 A nLow Shutdown Current: 5 A nControls Back-to-Back N-Channel MOSFETs nBlocks 50Hz and 60Hz AC Power nHot Swappable Supply Input nPin-Selectable Overcurrent Auto-Retry Timer or Latchoff n10-Pin MSOP and 3mm 3mm DFN Packages nReverse Battery Protection nPortable Instrumentation nAutomotive and Industrial Surge Protection nEnergy Storage SystemsLoad Protected from Reverse and Overvoltage at VINThe LT C 4368 protects applications from power supply voltages that may be too high, too low, or even negative and from overcurrent faults in both forward and reverse directions.

2 The LTC4368 controls the gate voltage of a pair of external N-channel MOSFETs to ensure that the load is connected to the input supply only when there are no voltage or current comparator inputs allow configuration of the over-voltage (OV) and undervoltage (UV) set points using an external resistive divider. A current sense resistor sets the forward and reverse circuit breaker current thresholds. After a forward current fault, the LTC4368 will either latch-off power, or retry after a user adjustable delay. After a reverse current fault, the LTC4368 waits for the output to fall 100mV below the input to reconnect power to the LTC4368 has a 32ms turn-on delay that debounces live supply input connections and blocks 50Hz and 60Hz AC power. UV/OV faults also trigger the 32ms recovery delay before the external MOSFETs are turned back on.

3 VALID WINDOWVINVINVOUTVOUTOV = 36 VUV = 7V200ms/DIV 40V20V/DIVGND4368 TA01b+70V20V/DIV++50mV 3mVVINUVOVRETRYSHDN4368 TA01aFAULTGATEVIN24V100 FVOUT7V TO COOLDOWN AFTER FORWARDOC 40V TO FOV = 36 VUV = 7 VIOUT TO 10 AVOUTSENSED ocument FeedbackAll registered trademarks and trademarks are the property of their respective owners. LTC43682 Rev AFor more information FREE FINISHTAPE AND REELPART MARKING*PACKAGE DESCRIPTIONTEMPERATURE RANGELTC4368 CDD-1#PBFLTC4368 CDD-1#TRPBFLGTH10-Lead (3mm 3mm) Plastic DFN0 C to 70 CLTC4368 CDD-2#PBFLTC4368 CDD-2#TRPBFLGTK10-Lead (3mm 3mm) Plastic DFN0 C to 70 CLTC4368 IDD-1#PBFLTC4368 IDD-1#TRPBFLGTH10-Lead (3mm 3mm) Plastic DFN 40 C to 85 CLTC4368 IDD-2#PBFLTC4368 IDD-2#TRPBFLGTK10-Lead (3mm 3mm) Plastic DFN 40 C to 85 CLTC4368 HDD-1#PBFLTC4368 HDD-1#TRPBFLGTH10-Lead (3mm 3mm) Plastic DFN 40 C to 125 CLTC4368 HDD-2#PBFLTC4368 HDD-2#TRPBFLGTK10-Lead (3mm 3mm)

4 Plastic DFN 40 C to 125 CLTC4368 CMS-1#PBFLTC4368 CMS-1#TRPBFLTGTG10-Lead Plastic MSOP0 C to 70 CLTC4368 CMS-2#PBFLTC4368 CMS-2#TRPBFLTGTJ10-Lead Plastic MSOP0 C to 70 CLTC4368 IMS-1#PBFLTC4368 IMS-1#TRPBFLTGTG10-Lead Plastic MSOP 40 C to 85 CLTC4368 IMS-2#PBFLTC4368 IMS-2#TRPBFLTGTJ10-Lead Plastic MSOP 40 C to 85 CLTC4368 HMS-1#PBFLTC4368 HMS-1#TRPBFLTGTG10-Lead Plastic MSOP 40 C to 125 CLTC4368 HMS-2#PBFLTC4368 HMS-2#TRPBFLTGTJ10-Lead Plastic MSOP 40 C to 125 C*Temperature grades are identified by a label on the shipping container. Consult ADI Marketing for parts specified with wider operating temperature and reel specifications. Some packages are available in 500 unit reels through designated sales channels with #TRMPBF CONFIGURATIONABSOLUTE MAXIMUM RATINGSS upply Voltage VIN .. 40V to 100 VInput Voltages U V, SHDN (Note 3).

5 To 80V OV (Note 3) .. to 20V RETRY (Note 3) .. to 5V VOUT, SENSE .. 10V to 80V VOUT to SENSE .. 10V to 10V VIN to VOUT .. 60V to 100 VTOP VIEWDD PACKAGE10-LEAD (3mm 3mm) PLASTIC DFN10967845321 GATESENSEVOUTFAULTSHDNVINUVOVRETRYGNDEXP OSED PAD (PIN 11) PCB GROUND CONNECTION OPTIONAL TJMAX = 150 C, JA = 43 C/W12345 VINUVOVRETRYGND109876 GATESENSEVOUTFAULTSHDNTOP VIEWMS10 PACKAGE10-LEAD PLASTIC MSOPTJMAX = 150 C, JA = 160 C/WORDER INFORMATIONO utput Voltages FAULT (Note 3) .. to 80V GATE .. 40V to VIN + 14 VInput Currents RETRY, UV, OV ,SHDN, FAULT .. 1mAOperating Ambient Temperature Range LTC4368C .. 0 C to 70 C LTC4368I .. 40 C to 85 C LTC4368H .. 40 C to 125 CStorage Temperature Range .. 65 C to 150 CLead Temperature (Soldering, 10 sec) MSOP Package ..300 C(Note 1, Note 2)LTC43683 Rev AFor more information , VOUT, SENSEVINI nput Voltage: Operating Range Protection Rangel 4060 100V VVIN(UVLO)Input Supply Undervoltage LockoutVIN Risingl Supply Current: On OffSHDN = , SENSE = VOUT = VIN SHDN = 0V, SENSE = VOUT = VINl l30 5100 25 A AIVIN(R)Reverse Input Supply CurrentVIN = 40V, SENSE = VOUT = 0Vl (UVLO)VOUT Undervoltage LockoutVOUT Rising, VOUT SENSE = 100mV, VIN = 12Vl (UVLO)VOUT Undervoltage Lockout DelayVIN = 12V, VOUT:0V 12V, VOUT SENSE = 100mV l40120280 s IVOUTVOUT Input Current.

6 On Off ReverseSHDN = , SENSE = VOUT = VIN SHDN = 0V, SENSE = VOUT = VIN VIN = 40V, SENSE = VOUT = 0Vl l l 50 3 20125 20 50 A A ACurrent SenseISENSESENSE Input Current: On Off ReverseSHDN = , SENSE = VOUT = VIN SHDN = 0V, SENSE = VOUT = VIN VIN = 40V, SENSE = VOUT = 0Vl l l 12 2 10 A A A VSENSE,FOvercurrent Fault Threshold, Forward (SENSE VOUT)VOUT = VIN VIN = 12V, VOUT = VIN = 12V, VOUT = 0Vl l l40 40 3050 50 5060 60 70mV mV mV VSENSE,ROvercurrent Fault Threshold, Reverse (SENSE VOUT) LTC4368 -1 VOUT = VIN LTC4368 -2 VOUT = VINl l 42 1 50 3 58 5mV mV VRRR everse Overcurrent Re-Enable Turn-On Threshold (VIN VOUT)VIN = SENSE = 6V to 60V VIN = SENSE = to <6Vl l 75 20100 50125 125mV mVGATE VGATEGate Drive (GATE VOUT)VIN = , IGATE = 0 A, 1 A VIN = 5V, IGATE = 0 A, 1 A VIN = 12V to 60V, IGATE = 0 A, 1 A l l l 3 104 V V IGATE(UP)

7 Gate Pull Up CurrentGATE = 15V, VIN = 12Vl 20 35 60 AIGATE(SLOW)Gate Slow Pull Down CurrentGATE = 20V, VIN = 12Vl 4090160 A IGATE(FAST)Gate Fast Pull Down CurrentGATE = 20V, SENSE = VIN = 12Vl 306090mAtD(FAST)Gate Fast Turn Off DelayCGATE = : UV, OV Faultl26 stD(SLOW)Gate Slow Turn Off DelayCGATE = , SHDN Falling, VIN = 12Vl150275575 stD(ON)Gate Turn-On Delay TimeVIN = 12V, Power Good to VGATE > 0Vl 223245mstp(GATE)Overcurrent Fault Propagation DelayCGATE = , Overcurrent Fault to VGATE = 0V SENSE VOUT: 0 to +100mV, or SENSE VOUT: 0 to 100mV ( LTC4368 -1) SENSE VOUT: 0 to 10mV ( LTC4368 -2)l3818 sELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C.

8 VIN = to 60V, unless otherwise noted (Note 2). UV = , OV = 0V, SHDN = , SENSE = VOUT = VIN unless otherwise AFor more information 1. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and 2. All currents into pins are positive; all voltages are referenced to GND unless otherwise 3. These pins can be tied to voltages below through a resistor that limits the current below 1mA. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25 C.

9 VIN = to 60V, unless otherwise noted (Note 2). UV = , OV = 0V, SHDN = , SENSE = VOUT = VIN unless otherwise , OVVUVUV Input Threshold VoltageUV Input Threshold VoltageOV Input Hysteresisl202532mVVOVHYSTOV Input Hysteresisl202532mVILEAKUV, OV Leakage CurrentV = , VIN = 60Vl 10nA tFAULTUV, OV Fault Propagation DelayOverdrive = 50mV, VIN = 12Vl12 sSHDNVSHDNSHDN Input ThresholdSHDN Input CurrentSHDN = 10V, VIN = 60Vl 15nAtSTARTD elay Coming Out of Shutdown ModeSHDN Rising to FAULT, VIN = 12Vl4008001400 stSHDN(F)SHDN To FAULT AssertedVIN = stLOWPWRD elay From Turn Off to Low Power OperationVIN = 12Vl203248msFAULTVOLFAULT Output Voltage LowIFAULT = 500 A, VIN = Leakage CurrentFAULT = 5V, VIN = 60Vl 20nA RETRYVRETRYC onfiguration Threshold for GATE Latch-OffRETRY Falling to IRETRY > 2 A VIN = Current for RETRY TimerRETRY = 2V, VIN = 12V RETRY = 0V, VIN = 12Vl 25 A AtCLEARM inimum SHDN Pulse to Clear Forward Overcurrent RETRY Latch RETRY = 0V, VIN = 12Vl15 stRETRYF orward Overcurrent Cool-Down DelayFAULT Asserted to FAULT Released.

10 CRETRY = 22nF SENSE = VOUT = VIN = 12Vl80120150msELECTRICAL CHARACTERISTICSLTC43685 Rev AFor more information Operating Current vs TemperatureVOUT Shutdown Current vs TemperatureVOUT Current vs Reverse VINGATE Drive vs GATE CurrentGATE Drive vs VIN Supply VoltageVOUT = 12 VVOUT = = 60 VTEMPERATURE ( C) 50 25025507510012501530456075 IVOUT ( A)4368 G04 SHDN = = VOUTVOUT = 12 VVOUT = = 60 VTEMPERATURE ( C) 50 2502550751001250123456 IVOUT ( A)4368 G05 SHDN = 0 VVIN = VOUT25 C125 C 45 CVOUT = 0 VVIN (V)0 10 20 30 4005101520 IVOUT ( A)4368 G06 VOUT = VINVOUT = 0 VVIN (V)04812162002468101214 VGATE (V)4368 G07TA = 25 CIGATE = 1 AVIN = VOUT = 12 VIGATE(UP) ( A)0 10 20 30 40 50 60024681012 VGATE (V)4368 G08TA = 125 CTA = 25 CTA = 45 CTYPICAL PERFORMANCE CHARACTERISTICSVIN Operating Current vs TemperatureVIN Shutdown Current vs VoltageVIN Supply Current vs Voltage ( 40V to 100V)VIN = 12 VVIN = = 60 VSHDN = = VOUTTEMPERATURE ( C) 50 25025507510012501020304050 IVIN ( A)4368 G01 VIN (V)010203040506002468 IVIN ( A)4368 G02TA = 125 CTA = 70 CTA = 25 CTA = 45 CSHDN = 0 VVIN = VOUTUV = SHDN = 0 VVOUT = 0 VVIN (V) 50 250255075100 2000 1500 1000 5000500 IVIN ( A)4368 G03TA = 125 CTA = 25 CTA = 45 CLTC43686 Rev AFor more information Output Current vs VoltageUV/OV Propagation Delay vs OverdriveGATE Turn-On Delay Time vs VIN VRR Threshold vs VOUTFAULT Leakage vs TemperatureUV, OV Thresholds vs TemperatureTYPICAL PERFORMANCE CHARACTERISTICSVIN = VOUT = 12 VTEMPERATURE ( C)