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TELECOM, DATACOM AND INDUSTRIAL POWER PRODUCTS - 1

Linear Technology Corporation

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TELECOM, DATACOM AND INDUSTRIAL POWER PRODUCTS - 2

Telecom, Datacom and Industrial Power Products High Performance Analog ICs

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02 Contents Contents Page Description Simplified DC/DC Conversion Block Diagrams 01 Isolated Block Diagram 02 Nonisolated Block Diagram Hot Swap™/Ideal Diode Controllers 03 Overvoltage Protection Regulator and Inrush Current Limiter 04 – 05 Hot Swap Controllers 06–08 Ideal Diode Controllers 07 48V Fuse Monitor Isolated DC/DC Conversion 09 – 10 Flyback Controllers 10 – 11 Forward Controllers/Smart Drivers 12 Demonstration Boards – Telecom/Datacom (18V to 75V) 13 Industrial Power Conversion (9V to 36V) 14 – 15 Push-Pull, Half- and Full-Bridge Controllers Nonisolated DC/DC Conversion, Up to...

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ISOLATED DC/DC CONVERSION BLOCK DIAGRAM Isolated DC/DC Conversion ORing Diode Controllers - Forward Controllers Smart Drivers Optocoupler Driver Reference Voltage Synchronous Buck High Current Step- Multiple Output PolyPhase® Step- System Monitor and Control, Digital Power 1 For descriptions of these products, visit www.linear.com.

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02 n o n I s o l at e d Dc / Dc C o n v e r s i o n block diagram Nonisolated DC/DC Conversion Surge Suppression, Hot Swap Controllers – High Voltage ORing Diode Controllers – High Voltage page 3, 4 page 6, 7 ORing Diode Controllers – Low Voltage (4V - 100V) Hot Swap Controllers – Low Voltage page 8 VIN page 5 0.6V to 52V Load Fuse Monitor page 7 Buck Controllers Optional IBA for Point-of-Load (POL) (Eg, 28V, 12V, 5V or 3.3V) LDO Regulators1 Load Load page 16 page 17 Monolithic Synchronous Buck Regulators1 Buck-Boost µModule Regulators and Controllers page 18 µModule Regulators1 Load High...

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OVERVOLTAGE PROTECTION REGULATOR AND INRUSH CURRENT LIMITER LT4356 Surge Stopper: Overvoltage Protection Regulator and Inrush Current Limiter In industrial applications, high voltage power supply spikes with durations ranging from a few microseconds to hundreds of milliseconds are commonly encountered. The electronics in these systems must not only survive transient voltage spikes, but in many cases also operate reliably throughout the event. The LT®4356 Surge Stopper reduces the need for bulky filtering components (capacitors, inductors, TVS diodes, fuses) by isolating low voltage...

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04 HOT SWAP CONTROLLERS - HIGH VOLTAGE Hot Swap Controllers - High Voltage Hot Swap controllers allow a circuit board to be safely inserted and removed from a live backplane. Using an N-channel pass MOSFET, the board supply voltage can be ramped at an adjustable rate. Product features include independent adjustable inrush current and overcurrent limits to minimize stresses on the pass MOSFET during start-up, input step, and output step short-circuit conditions. Newer generation devices include an onboard ADC for board voltage and current monitoring, and an l2C interface for microcontroller...

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Hot Swap Controllers - Low Voltage Low voltage Hot Swap controllers include independent high side gate drivers to control single or dual voltages, as well as voltage power-up and power-down ramp control, current foldback and inrush limiting. Our latest LTC4217 and LTC4218 Hot Swap products allow the current limit threshold to be adjusted dynamically using an external pin. Additional features include a current monitor output that amplifies the sense resistor voltage for ground referenced current sensing and a MOSFET temperature monitor output. Dedicated 12V versions contain preset...

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IDEAL DIODE CONTROLLERS - HIGH VOLTAGE ORing Ideal Diode Controllers Linear's family of ideal diode controllers reduces forward voltage drop and power dissipation in ORing applications, eliminating the heat sinks required by conventional rectifiers. They deliver smooth switchover without chatter and are free from oscillation in load sharing applications, yet respond quickly when called upon to block DC current in the reverse state. Our controllers prevent backfeeding between supplies and are easily configured to protect against reverse polarity inputs. Ideal Diode Controllers - High Voltage...

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IDEAL DIODE CONTROLLERS/FUSE MONITOR LTC4357: Positive High Voltage Ideal Diode Controller The LTC4357 easily ORs power sources to increase total system reliability. In diode-OR applications, the LTC4357 controls the forward voltage drop across the MOSFET to ensure smooth current transfer from one path to the other without oscillation. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients. Reduces Power Dissipation by Replacing a Power Schottky Diode with an N-Channel MOSFET 0.5us Turn-Off Time Limits Peak Fault Current Wide Operating Voltage Range:...

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IDEAL DIODES AND CONTROLLERS - LOW VOLTAGE Ideal Diodes and Controllers - Low Voltage LTC4352: Low Voltage Ideal Diode Controller with Monitoring The LTC4352 is a OV to 18V ideal diode controller that enables low loss ORing of multiple power sources with minimal disturbance to supply voltages. A fast turn-on reduces the load voltage drop during supply switchover. Power passage is disabled during undervoltage or overvoltage conditions. The controller also features an open MOSFET detect circuit that flags excessive voltage drop across the pass transistor in the on state. A REV pin enables...

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TELECOM, DATACOM AND INDUSTRIAL POWER PRODUCTS - 12

Introduction to DC/DC Controllers High density power systems require very high efficiency, excellent power density and ease of implementation. Linear Technology offers a family of high performance DC/DC controllers specifically tailored for isolated power conversion for input voltages ranging from 4V to 100V for telecom, datacom and industrial applications. We feature primary- and secondary-side control ICs, which provide synchronous rectification, fast transient response, overvoltage and overcurrent protection and a host of other features. These devices enable output voltages from 0.6V to...

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f ly b a c k / F OR W ARD c o n t r o l l e r s Flyback Controllers/Monolithic – Low Power (Up to 60W) Maximum Output1 Power (W) Part Number VOUT3 Range (V) VIN Range (V) Operating Frequency Package Description Primary-Side Flyback Controllers/Monolithic LT3573 7 3 to 40 1.23 to 52 40kHz to 1MHz MSOP-16E 3x3 QFN-16 No-Opto Flyback with Integrated Power Switch LTC3803-5 25 4.8 to 753 0.8 to 52 200kHz ThinSOT Constant Frequency Current Mode Flyback Controller with 5.7V UVLO LTC3803/-3 25 8.7 to 753 0.8 to 52 200kHz or 300kHz ThinSOT Constant Frequency Current Mode Flyback Controller in...

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