DC1561B: POE, 5V @ 4.5A, 9 ~ 57V in
Summary
Demonstration circuit 1561B is a high power supply, featuring the LTCR4278. This board is a Type 2 (IEEE 802.3at) compliant, high power Power-over-Ethernet (PoE), Powered Device (PD). The DC1561B also features a wide auxiliary input voltage range of 9 V to 57 V. The demonstration board can connect to a Type 2 Power Sourcing Equipment (PSE) device, such as the DC1567.
The LTC4278 provides IEEE 802.3at standard (PoE+) PD interfacing and power supply control. When the PD fully powers, the PD interface passes power from the PSE to the switcher through an internal, low resistance, high power MOSFET. The highly integrated LTC4278 controls a high power, small power supply that utilizes a highly-efficient isolated flyback topology with synchronous rectification.
The DC1561B outputs 5 V at 4.5 A.
DC1561B also demonstrates the use of an auxiliary wall adapter for nominal 12 VDC, 24 VAC/24 VDC, or 48 VDC systems. When present, the auxiliary supply is the dominant supply over PoE to provide power.
Specifications
| Manufacturer | Analog Devices Inc. |
|---|---|
| Category | Power Management |
| Sub-Category | POE - Power Over Ethernet |
| Eval Board Part Number | DC1561B-ND |
| Eval Board Supplier | Analog Devices Inc. |
| Eval Board |
Normally In Stock
|
| Compliance |
IEEE 802.3at Type 2
|
| Outputs and Type |
1 Isolated
|
| Voltage Out |
5 V
|
| Current Out |
4.5 A
|
| Voltage In |
9 ~ 57 V
|
| Efficiency @ Conditions |
>86%, 24 Vaux, 5V @ 1.5 ~ 4.5 A
>85%, 57 Vaux, 5V @ 2.7 ~ 4.5 A >84%, 9 Vaux, 5V @ 1.5 ~ 3.4 A >84%, 42 Vaux, 5V @ 1.8 ~ 4.5 A |
| Internal Switch |
Yes
|
| Features |
Current Limit (Adj. or Fixed)
Ethernet Connection Over Voltage Protection Power Good Output Short Circuit Protection Shutdown, Enable, Standby Soft Start Thermal Protection Under Voltage Protection, Brown-Out |
| Switching Frequency |
100 kHz
|
| Component Count + Extras |
59 + 46
|
| Application / Target Market |
RF: Remote Controls
RF: Wireless Sensor RF: WLAN Access Points Security IP Camera VOIP Phones |
| Design Author |
Linear Technology
|
| Main I.C. Base Part |
LTC4278
|
| Date Created By Author | 2012-02 |
| Date Added To Library | 2013-03 |
