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LTC4240IGN Folha de dados(PDF) 1 Page - Linear Technology |
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LTC4240IGN Folha de dados(HTML) 1 Page - Linear Technology |
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1 / 28 page  LTC4240 1 4240f FEATURES DESCRIPTIO APPLICATIO S TYPICAL APPLICATIO The LTC ®4240 is a Hot SwapTM controller that allows a board to be safely inserted and removed from a live CompactPCI bus slot. The LTC4240 has a built-in 2-wire I2C compatible interface to allow software control and monitoring of device function and power supply status. Two external N-channel transistors control the 3.3V and 5V supplies, while two internal switches control the –12V and 12V supplies. Electronic circuit breakers protect all four supplies against overcurrent faults. The PWRGD output indicates when all of the supply voltages are within tolerance. The OFF/ON pin is used to cycle the board power or reset the circuit breaker. The I2C interface allows the user to turn the device off or on, set RESETOUT, turn on the status LED driver and ignore 12V, –12V faults. It also allows the user to read the status of the FAULT, RESETIN, RESETOUT, PWRGD, PRSNT1# and PRSNT2# pins. Under a fault condition, the I2C interface can also be used to determine which of the four supplies generated the fault. The LTC4240 is available in a 28-pin narrow SSOP package. s Hot Board Insertion into CompactPCI Bus s Electronic Circuit Breaker s Allows Safe Board Insertion and Removal from a Live CompactPCI TM Bus s I2C TM Compatible 2-Wire Interface s PRECHARGE Output Biases I/O Pins During Card Insertion and Extraction s Controls 3.3V, 5V, 12V and –12V Supplies s Foldback Current Limit with Circuit Breaker s LOCAL_PCI_RST# Logic On-Board s QuickSwitch ® Enable Output s Status LED Driver s User Programmable Supply Voltage Power-Up Rate s Registers Individual Supply Faults s Available in a 28-Pin Narrow SSOP Package CompactPCI Hot Swap Controller with I2C Compatible Interface , LTC and LT are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. QuickSwitch is a registered trademark of Quality Semiconductor Corp. CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group. I2C is a trademark of Philips Electronics N.V. C5 0.01 µF C1 0.047 µF C4 0.01 µF GND 12VIN VEEIN OFF/ON FAULT PWRGD RESETIN 3VIN 3VIN 5VIN 3VSENSE 3VOUT 5VIN LTC4240 PRECHARGE DRIVE 5VOUT 5VSENSE GATE 12VOUT VEEOUT TIMER RESETOUT EARLY V(I/O) R16 10k R18 1k R17, 1.2k R3 10 Ω 5VIN R4 10 Ω R15 2k R30 1k R29 10 Ω 5VOUT 5V AT 5A 3VOUT 3.3V AT 7.6A 12VOUT 12V AT 500mA VEEOUT –12V AT 100mA 4240 TA01 R11 18 Ω 3VIN 3VOUT R6 10k R5 1k R8, 1k R7, 12 Ω C3, 4.7nF R9 24 Ω R1 0.005 Ω Q1 Si7880DP Q2 Si7880DP R2 0.007 Ω C2 0.1 µF R13 10 Ω R14 10 Ω MEDIUM 5V LONG 5V MEDIUM 3.3V LONG 3.3V LONG V(I/O) 12V –12V BD_SEL# HEALTHY# PCI_RST# GROUND TO PCI BRIDGE DEVICE OR EQUIVALENT BE DGND LED SCL SDA R19 2.55k 1% R20 1.91k 1% PRSNT2# PRSNT1# ADDRIN SCL SDA C8 0.01 µF PER PIN CLOAD (5VOUT) CLOAD (3VOUT) CLOAD (12VOUT) CLOAD (VEEOUT) C7 0.01 µF PER PIN C6 0.01 µF 5VIN Z4 Z1 Z2 Z1, Z2: SMAJ12CA Z3, Z4: IPMT5.0AT3 Z3 CompactPCI BACKPLANE CONNECTOR (FEMALE) CompactPCI BACKPLANE CONNECTOR (MALE) LOCAL_PCI_RST# R10 100 Ω TO QUICKSWITCH ® ENABLE Q3 MMBT2222A R12 10k R22, 2.74 Ω R21, 1.74 Ω R25, 1.2k R28, 200 Ω + + + C9 10nF C10 10nF C11 10nF |
Nº de peça semelhante - LTC4240IGN |
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Descrição semelhante - LTC4240IGN |
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