IRLR3110ZTRPBF
Infineon
we chose the Infineon IRLR3110ZTRPbF 100V, 63A n-channel MOSFET as the primary MOSFET.
Reference DesignAnalog
MAXREFDES1132: 2W DC-DC Flyback Converter Using MAX17596
A reference design for a 2W DCM flyback converter using the MAX17596 controller, featuring 17V-36V input and 5V/0.4A output with 86.25% efficiency.
Overview
The MAXREFDES1132 is a reference design document for a 2W DC-DC flyback converter operating in discontinuous conduction mode (DCM). It uses the MAX17596 peak-current-mode controller to provide a regulated 5V output from a wide 17V to 36V input range. The design operates at a 150kHz switching frequency and achieves a peak efficiency of 86.25%. Key features include programmable frequency dithering for reduced EMI, input overvoltage protection, soft-start, and thermal shutdown. The document provides detailed hardware specifications and a step-by-step design procedure for component selection, including the transformer magnetizing inductance and current-limit resistors.
Use Cases
- Industrial power supplies
- Isolated power systems
- EMI-sensitive electronics
- Low-voltage DC-DC conversion
- Compact power conversion modules
Topics
MAX17596
MAXREFDES1132
flyback converter
DCM
DC-DC converter
Analog Devices
peak-current-mode control
power supply design
MAX17606
low EMI
Referenced Parts
TL431AQDBZRQ1
Texas Instruments
U3 is a low-voltage adjustable shunt regulator with a 2.5V reference voltage. In this design we selected a Texas Instruments TL431AQDBZRQ1 2.5V shunt regulator.
SIR836DP-T1-GE3
Vishay
selected Vishay’s SIR836DP-T1-GE3 40V MOSFET as the secondary side for synchronous rectification using MAX17606.
MAX17596
Analog Devices
The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulators.
MAX17606
Analog Devices
synchronous rectification is being used through the MAX17606 secondary MOSFET driver.
SMD110PL
Micro Commercial Components
selected the Micro Commercial Components SMD110PL 100V, 1A diode as the snubber diode.
750370884
Würth Electronik
A customized transformer 750370884 from Würth Electronik is used in this design.
| IRLR3110ZTRPBF | Infineon | we chose the Infineon IRLR3110ZTRPbF 100V, 63A n-channel MOSFET as the primary MOSFET. |
| TL431AQDBZRQ1 | Texas Instruments | U3 is a low-voltage adjustable shunt regulator with a 2.5V reference voltage. In this design we selected a Texas Instruments TL431AQDBZRQ1 2.5V shunt regulator. |
| SIR836DP-T1-GE3 | Vishay | selected Vishay’s SIR836DP-T1-GE3 40V MOSFET as the secondary side for synchronous rectification using MAX17606. |
| MAX17596 | Analog Devices | The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulators. |
| MAX17606 | Analog Devices | synchronous rectification is being used through the MAX17606 secondary MOSFET driver. |
| SMD110PL | Micro Commercial Components | selected the Micro Commercial Components SMD110PL 100V, 1A diode as the snubber diode. |
| 750370884 | Würth Electronik | A customized transformer 750370884 from Würth Electronik is used in this design. |