LTC3706

NOT RECOMMENDED FOR NEW DESIGNS

Secondary-Side Synchronous Forward Controller with Polyphase Capability

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $4.69
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Part Details

  • Secondary-Side Control for Fast Transient Response
  • Self-Starting Architecture Eliminates Need for Separate Bias Regulator
  • Proprietary Gate Drive Encoding Scheme Reduces System Complexity
  • PolyPhase® Operation Reduces CIN Requirements
  • Current Mode Control Ensures Current Sharing
  • PLL Fixed Frequency: 100kHz to 500kHz
  • ±1% Output Voltage Accuracy
  • True Remote Sense Differential Amplifier
  • Power Good Output Voltage Monitor
  • High Voltage Linear Regulator Controller
  • Wide Supply Range: 5V to 30V
  • Available in a Narrow 24-Lead SSOP Package
LTC3706
Secondary-Side Synchronous Forward Controller with Polyphase Capability
36V-72V to 3.3V/20A Isolated Forward Converter Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 4

Design Note 1

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
LTC3766
RECOMMENDED FOR NEW DESIGNS High Efficiency, Secondary-Side Synchronous Forward Controller
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Tools & Simulations

LTspice 1

Models for the following parts are available in LTspice:

  • LTC3706
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC888A-A

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 3.3V/50A

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Product Details

Demonstration circuit 888A-A is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-A provides an isolated 3.3V at 50A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.

eval board
schematic 2
DC888A-C

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 12V/20A

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Product Details

Demonstration circuit 888A-C is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-C provides an isolated 12V at 20A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.

eval board
schematic 3
DC776A

LTC3705EGN/LTC3706EGN Demo Board | Forward Converter with Secondary Side Control, 36V ≤ VIN ≤72V, VOUT = 1.5V @ 45A

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Product Details

Demonstration circuit 776 is a 36V-72VIN, 2-switch forward converter with synchronous secondary-side control featuring the LTC3705 and LTC3706. This circuit was designed specifically to attain a high stepdown ratio power supply in one stage in order to efficiently power 1.5V loads from a typical telecom input voltage range. Isolation voltage is 1500VDC. This circuit features secondary-side control of the supply without the need of an optocoupler.

eval board
schematic 4
DC888A-B

LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 5V/40A

Buy Now View Details

Product Details

Demonstration circuit 888A-B is a high power isolated synchronous forward converter with synchronous secondary side control featuring the LTC3725 and LTC3706. When powered from a 36-72V input, a single DC888A-B provides an isolated 5V at 40A in a quarter-brick footprint. If higher output current is required, multiple DC888A boards may be stacked together using on-board connectors for a complete PolyPhase current sharing solution.
DC888A-A
LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 3.3V/50A
DC888A-A - Schematic
DC888A-C
LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 12V/20A
DC888A-A - Schematic
DC776A
LTC3705EGN/LTC3706EGN Demo Board | Forward Converter with Secondary Side Control, 36V ≤ VIN ≤72V, VOUT = 1.5V @ 45A
DC776A - Schematic
DC888A-B
LTC3725EMSE/LTC3706EGN Demo Board | 1/4 Brick, 36V ≤ VIN ≤ 72V, VOUT: 5V/40A
DC888A-A - Schematic

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