STTH4R02B
Stmicroelectronics
We selected STMicroelectronics® STTH4R02B 200V, 4A diode as the secondary side rectifier diode
Design DocumentAnalog
MAXREFDES1141: 2.4W DC-DC Flyback Converter Using MAX17596
A design document for a 2.4W DCM flyback converter using the MAX17596, providing 24V at 100mA from a 19V-29V DC input with 87.8% efficiency.
Overview
The MAXREFDES1141 is a reference design document for a 2.4W DC-DC discontinuous conduction mode (DCM) flyback converter centered on the Analog Devices MAX17596 peak-current-mode controller. The design specifies a 24V DC output at 100mA from a 19V to 29V input range, achieving 87.8% peak efficiency. The converter operates at a programmable switching frequency of 150kHz and includes features such as frequency dithering for low-EMI operation, programmable soft-start, and cycle-by-cycle peak current limiting. The document provides a detailed technical guide for hardware implementation, including transformer selection using the Wurth Elektronik 750317349 and calculations for magnetizing inductance, turns ratio, and current-limit resistance.
Use Cases
- Industrial automation power supplies
- Isolated DC-DC conversion
- Low-power industrial equipment
- EMI-sensitive power applications
- Distributed power architectures
Topics
MAX17596
MAXREFDES1141
Analog Devices
DCM flyback converter
DC-DC converter
Wurth Elektronik 750317349
peak-current-mode controller
isolated power supply
24V output
power stage design
Referenced Parts
TL431AQDBZRQ1
Texas Instruments
In this design we selected a Texas Instruments® TL431AQDBZRQ1 2.5V shunt regulator.
SQSA80ENW-T1_GE3
Vishay
For this application we chose the Vishay® SQSA80ENW-T1-GE3 80V, 18A n-channel MOSFET as the primary MOSFET.
MAX17596
Analog Devices
The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulators.
SMD110PL
Micro Commercial Components
We selected the Micro Commercial Components® SMD110PL 100V, 1A diode as the snubber diode.
750317349
Wurth Elektronik
A customized transformer 750317349 from Würth Elektronik® is used in this design.
MAX17606
Analog Devices
secondary side rectifier diode using MAX17606
| STTH4R02B | Stmicroelectronics | We selected STMicroelectronics® STTH4R02B 200V, 4A diode as the secondary side rectifier diode |
| TL431AQDBZRQ1 | Texas Instruments | In this design we selected a Texas Instruments® TL431AQDBZRQ1 2.5V shunt regulator. |
| SQSA80ENW-T1_GE3 | Vishay | For this application we chose the Vishay® SQSA80ENW-T1-GE3 80V, 18A n-channel MOSFET as the primary MOSFET. |
| MAX17596 | Analog Devices | The MAX17596 is a peak-current-mode controller for designing wide input-voltage flyback regulators. |
| SMD110PL | Micro Commercial Components | We selected the Micro Commercial Components® SMD110PL 100V, 1A diode as the snubber diode. |
| 750317349 | Wurth Elektronik | A customized transformer 750317349 from Würth Elektronik® is used in this design. |
| MAX17606 | Analog Devices | secondary side rectifier diode using MAX17606 |