REFD5043, Active-Clamped Forward, Dual-Output PD Provides High-Performance Solution for PoE Applications
Reference Design using part MAX5969A by Analog Devices
Image
1 / 3
For End Products
- PoE Applications
Description
- REFD5043, Reference design for a highly efficient, active-clamped forward, dual 3.3V/8.8V output powered device (PD). The design features the MAX5969A and MAX5900 as its controllers. The design also uses the MAX5974C, which controls current-mode PWM converters and provides zero-voltage switching (ZVS) and frequency foldback to enhance supply efficiency. Using these devices, this RD is IEEE 802.3at compliant and is a high-performance, compact and cost-efficient solution for PoE and nonstandard high-power PDs. The design can also support the auxiliary input voltage to provide maximum 55W output power
Key Features
-
Conversion TypeDC to DC
-
Input Voltage42 to 57 V
-
Output Voltage3.3|8.8 V
-
Output Current3.35@3.3V|4.6@8.8V A
-
Output Power55 W
-
Efficiency90.4 %
-
TopologyForward- Active Clamp
Featured Parts (5)
| Part Number | Manufacturer | Type | Description | |||
|---|---|---|---|---|---|---|
|
MAX5974CETE+ | Analog Devices | PWM and Resonant Controllers | Current Mode PWM Controller 1A 100kHz to 600kHz 16-Pin TQFN EP T/R | Buy | |
|
FOD817CSD | onsemi | Transistor and Photovoltaic Output Photocouplers | Optocoupler DC-IN 1-CH Transistor DC-OUT 4-Pin PDIP SMD T/R | Buy | |
|
TLV431AIDBVT | Texas Instruments | Voltage References | V-Ref Adjustable 1.24V to 6V 15mA 5-Pin SOT-23 T/R | Buy | |
|
|
MAX5974CETE+T | Analog Devices | PWM and Resonant Controllers | Current Mode PWM Controller 1A 100kHz to 600kHz 16-Pin TQFN EP T/R | Buy | |
|
MAX5969AETB+T | Analog Devices | Interface Controllers | Powered Device Interface Controller 10-Pin TDFN EP T/R | Buy | |