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Secondary-Side Synchronous MOSFET Driver for Flyback Converters

Small Form Factor, High-Current Secondary-Side Driver Ideal for High-Power, Isolated DC-DC Flyback

Product Details

Key Features

Applications/Uses

Parametric specs for MOSFET Drivers
No. of Drivers 1
Logic Polarity Noninverting
RON (Ω) (max) 0.63
RON (Ω) (typ) 0.38
Configuration Low-Side N Drive
IOUT (A) (peak) 2.66
VSUPPLY (V) 4.5 to 36
Oper. Temp. (°C) -40 to +125
Package/Pins TSOT/6
Budgetary
Price (See Notes)
0.75
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Simplified Block Diagram

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Parameters

Parametric specs for MOSFET Drivers
No. of Drivers 1
Logic Polarity Noninverting
RON (Ω) (max) 0.63
RON (Ω) (typ) 0.38
Configuration Low-Side N Drive
IOUT (A) (peak) 2.66
VSUPPLY (V) 4.5 to 36
Oper. Temp. (°C) -40 to +125
Package/Pins TSOT/6
Budgetary
Price (See Notes)
0.75

Key Features

  • Wide 4.5V to 36V Input
  • 2A/4A Peak Source/Sink Gate Drive Currents
  • Suitable for Discontinuous Conduction Mode (DCM), Border Conduction Mode (BCM)
  • 320μA (typ) Low Quiescent Current
  • Programmable Turn-Off Trip Point
  • Programmable Minimum Off-Time to Handle DCM Ringing
  • Thermal-Shutdown Protection
  • 6-Lead SOT-23 Package

Applications/Uses

  • High-Efficiency Isolated Flyback Converters

Description

The MAX17606 is a secondary-side synchronous driver and controller specifically designed for the isolated flyback topology operating in Discontinuous Conduction Mode (DCM) or Border Conduction Mode (BCM). By replacing the secondary diode with a MOSFET, the device improves the efficiency and simplifies thermal management. The 7V VDRV of the device makes it suitable for switching both logic-level and standard MOSFETs used for flyback synchronous rectification. The 36V input voltage allows it to drive from either the output voltage or rectified drain voltage of the secondary MOSFET. Programmable minimum on and off-times provide flexibility needed to handle transformer parasitic element-related ringing in a robust manner. With 2A/4A source/sink currents, the MAX17606 is ideal for driving low RDS(on) power MOSFETs with fast gate transition times.

Simplified Block Diagram

MAX17606: Typical Application Circuit MAX17606: Typical Application Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .