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LTC4261IGN 数据表(PDF) 1 Page - Linear Technology |
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LTC4261IGN 数据表(HTML) 1 Page - Linear Technology |
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1 / 32 page  LTC4261/LTC4261-2 1 42612fb Negative Voltage Hot Swap Controllers with ADC and I2C Monitoring The LTC®4261/LTC4261-2 negative voltage Hot SwapTM controllers allow a board to be safely inserted and removed from a live backplane. Using an external N-channel pass transistor, the board supply voltage can be ramped at an adjustable rate. The devices feature independently adjust- able inrush current and overcurrent limits to minimize stresses on the pass transistor during start-up, input step and output short conditions. The LTC4261 defaults to latch-off while the LTC4261-2 defaults to auto-retry on overcurrent faults. An I2C interface and onboard 10-bit ADC allow monitoring of board current, voltage and fault status. A single-wire broadcast mode is available to simplify the interface by eliminating two optoisolators. The controllers have additional features to interrupt the host when a fault has occurred, notify when output power is good, detect insertion of a board and turn off the pass transistor if an external supply monitor fails to indicate power good within a timeout period. ■ AdvancedTCA Systems ■ Telecom Infrastructure ■ –48V Distributed Power Systems ■ Power Monitors ■ Allows Safe Insertion into Live –48V Backplanes ■ 10-Bit ADC Monitors Current and Voltages ■ I2C/SMBus Interface or Single-Wire Broadcast Mode ■ Floating Topology Allows Very High Voltage Operation ■ Independently Adjustable Inrush and Overcurrent Limits ■ Controlled Soft-Start Inrush ■ Adjustable UV/OV Thresholds and Hysteresis ■ Sequenced Power Good Outputs with Delays ■ Adjustable Power Good Input Timeout ■ Programmable Latchoff or Auto-Retry After Faults ■ Alerts Host After Faults ■ Available in 28-Lead Narrow SSOP and 24-Lead (4mm × 5mm) QFN Packages –48V/200W Hot Swap Controller with I2C and ADC + PGI ALERT SDAO SDAI SCL ADIN PGIO PG UVL UVH ADIN2 OV INTVCC ON RAMP DRAIN GATE LTC4261CGN VIN VEE EN TMR SS SENSE 1M 4 × 1k IN SERIES 1/4W EACH 453k 1% –48V RTN –48V INPUT UV = 38.5V UV RELEASE AT 43V OV RELEASE AT 71V OV = 72.3V 16.9k 1% 11.8k 1% 10nF 100V 5% 47nF 0.1 µF 1 µF 220nF 47nF 0.008 Ω 1% 10 Ω VOUT Q1 IRF1310NS 1k 330 µF 100V LOAD ON 42612 TA01 VIN + VIN – Start-Up Behavior , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. Patents pending. All other trademarks are the property of their respective owners. TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION –48V INPUT 50V/DIV VOUT 50V/DIV SENSE 0.5A/DIV PG 50V/DIV 10ms/DIV 42612 TA01b |
类似零件编号 - LTC4261IGN |
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类似说明 - LTC4261IGN |
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