RAK9003 PoE Pi HAT Datasheet

Overview

Description

The RAK9003 PoE Pi HAT is an add-on board with a Raspberry PI form factor, compatible with RPi 3B+ and RPi4 which can be plugged into a Raspberry Pi directly. The RAK9003 PoE Pi HAT makes it possible to power the Raspberry Pi via a standard CAT 5 Ethernet cable.

The RAK9003 PoE Pi HAT is designed to be compatible with the IEEE 802.3af/at Power-over-Ethernet (PoE). It is compatible with both PoE Mode A and Mode B. The RAK9003 PoE Pi HAT signature and control circuit provides the PoE AT compatibility signature and power classification required by the Power Sourcing Equipment (PSE) before applying up to 30 W power to the port. The RAK9003 PoE Pi HAT is compatible with Class 0 to Class 4 equipment. The high efficiency DC/DC converter operates over a wide input voltage range and provides a regulated low ripple and low noise output. The DC/DC converter also has built-in overload and short-circuit output protection.

Key Features

• Raspberry Pi form factor with a 40-pin compatible header (Pi3 B+, Pi4 compatible)
• Conforming to the IEEE 802.3af/at (mode A & mode B), 25W max load
• Contains physical layer power negotiation circuitry, compatible with Class 0 to Class 4 equipment
• Wide operating voltage: 42 V ~ 57 V
• Output Current: 5 V @ 5 A
• Output voltage ripple: 200 mVPP
• High Efficiency: 83% (input 48 V, 5 V @ 5 A)
• High isolation: 1.5 kV isolation input to output
• Overcurrent / short-circuit protection
• RoHS Compliant
• Operating Temperature: -40° C ～+85° C

Specifications

Overview

The overview covers only the block diagram of the RAK9003 PoE Pi HAT.

Block Diagram

Figure 1: RAK9003 PoE Pi HAT Block Diagram

Hardware

The hardware specification shows the pinouts of the RAK9003 and its corresponding functions. It also presents the parameters and the standard values of the board.

Pin Definition

Figure 1: RAK9003 PoE HAT Pinout Diagram

Pin No.	Name	Description
1	NC	No Connection
2	+5 V	+5 V Output
3	NC	No Connection
4	+5 V	+5 V Output
5	NC	No Connection
6	GND	GND
7	NC	No Connection
8	NC	No Connection
9	GND	GND
10	NC	No Connection
11	NC	No Connection
12	NC	No Connection
13	NC	No Connection
14	GND	GND
15	NC	No Connection
16	NC	No Connection
17	NC	No Connection
18	NC	No Connection
19	NC	No Connection
20	GND	GND
21	NC	No Connection
22	NC	No Connection
23	NC	No Connection
24	NC	No Connection
25	GND	GND
26	NC	No Connection
27	NC	No Connection
28	NC	No Connection
29	NC	No Connection
30	GND	GND
31	NC	No Connection
32	NC	No Connection
33	NC	No Connection
34	GND	GND
35	NC	No Connection
36	NC	No Connection
37	NC	No Connection
38	NC	No Connection
39	GND	GND
40	NC	No Connection

Electrical Characteristics

Typical Characteristics

Figure 1: Noise VIN = 42 V, IO = 5 A, 5~20 MHz Bandwidth

Figure 1: Transient Response, VIN = 42 V IO = 50% ~ 100% ~ 50%

Figure 1: Noise VIN = 48 V, IO = 5 A, 5~20 MHz Bandwidth

Figure 1: Transient Response, VIN = 48 V, IO = 50% ~ 100% ~ 50%

Figure 1: Noise VIN = 57 V, IO = 5 A, 5~20 MHz Bandwidth

Figure 1: Transient Response VIN = 57 V, IO = 50% ~ 100% ~ 50%

Figure 1: Power Down VIN = 42 V, C1: Output Voltage, C2: PSE Out, C3: Input Current, ILoad = 100% IO max

Figure 1: Short-Circuit Output, VIN = 42 V

Figure 1: Power Down VIN = 48 V, C1: Output Voltage, C2: PSE Out, C3: Input Current, ILoad = 100% IO max

Figure 1: Short-Circuit Output, VIN = 48 V

Figure 1: Power Down, VIN = 57 V, C1: Output Voltage, C2: PSE Out, C3: Input Current, ILoad = 100% IO max

Figure 1: Short-Circuit Output VIN = 57 V

Figure 1: Efficiency

Figure 1: Power Dissipation

Figure 1: Startup form 56 V 802.3at PSE, C1: Output Voltage, C2: PSE Out, C3: Input Current, ILoad = 100% IO max

Figure 1: Derating Curve

Operating Conditions

The table below lists the operation voltage and temperature ranges:

Parameter	Description	Min.	Typical	Max.
Input Voltage	Input DC Voltage	42 V	48 V	57 V
Output Voltage	Output DC voltage	4.9 V	5.0 V	5.1 V
Operating Temperature	Temperature Range	-40° C	+25° C	+85° C

Maximum ESD

The table below lists the maximum ESD:

Parameter	Min	Typical	Max	Remarks
ESD sensitivity for all pins	-	-	1 kV	Human Body Model according to JESD22-A114
ESD immunity for ANT1	-	-	4 kV	Contact Discharge according to IEC 61000-4-2
-	-	-	8 kV	Air Discharge according to IEC 61000-4-2

NOTE

The module is an Electrostatic Sensitive Device and requires special precautions when handling.