BPI-9460 IEEE 802.3af Isolation Model PoE module

Description

The BPI-9460 series of modules are designed to extract power from a conventional twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af Power-over-Ethernet(PoE) standard. The BPI-9460 signature and control circuit provides the PoE compatibility signature and power classification required by the Power Sourcing Equipment (PSE) before applying up to 15W power to the port. The RT9460 provides a Class 0 signature.The DC/DC converter operates over a wide input voltage range and provides a regulated output. The DC/DC converter also has built-in short-circuit output protection.

Applications

• IP Cameras
• Wireless access point
• Security and alarm systems
• VOIP telephone
• Point of sale network terminal equipment

Features

• IEEE802.3af compliant
• Input voltage range 36V to 57V
• Integral high efficiency DC/DC converter.
• Low output ripple and noise
• High performance with low price
• Short-circuit protection
• Adjustable Output
• Optional multi-voltage output 3.3V 5V 12V 24V
• Transformer isolation ,1500V isolation (input to output)
• Easy to use, with a minimum number of external components.
• Rohs compliantnt

Hardware

BPI-9460 Product Selector

Part Number	Nominal Output Voltage	Output current	Maximum Output Power*	Marking	Package
BPI-9460S-3.3V	3.3V	2A	10W**	3.3V	SIL
BPI-9460S -5V	5V	2.4A	13W**	5V	SIL
BPI-9460S -12V	12V	1A	13W**	12V	SIL
BPI-9460S -24V	24V	0.5A	13W**	24V	SIL

• At 25°C with VIN = 48V
  • Maximum Output Power: means it not could be operated in continuous stage .only short-term of Boot up/Heavy loading

Absolute Maximum Ratings

	Parameter	Symbol	Min	Max	Units
1	DC Supply Voltage	VCC	-0.3	60	V
2	DC Supply Voltage Surge for 1ms	VSURGE	-0.6	80	V
3	Storage Temperature	TS	-40	100	OC

Note 1: Exceeding the above ratings may cause permanent damage to the product. Functional operation under these conditions is not implied. Maximum ratings assume free airflow.

Recommended Operating Conditions

	Parameter	Symbol	Min	Typ	Max	Units
1	Input Supply Voltage1	VIN	36	48	57	V
2	Under Voltage Lockout	VLOCK	30		36	V
3	Operating Temperature2	TOP	-20	25	70	Ta / OC

Note

• 1: With minimum load
• 2: See Section Operating Temperature Range
  • Extended use close to, or at the maximum operating temperature can reduce the life time of the device.

Pin Description:

Pin #	Name	Description
1	VA1	RX Input (1). This input pin is used in conjunction with VA2 and connects to the centre tap of the transformer connected to pins 1&2 of the RJ45 connector (RX) - it is not polarity sensitive.BPI-9460S this pin is direct Input +. This pin connects to the positive (+) output of the input bridge rectifier.
2	VA2	TX Input (2). This input pin is used in conjunction with VA1 and connects to the centre tap of the transformer connected to pins 3&6 of the RJ45 connector (TX) - it is not polarity sensitive.BPI-9460S this pin is direct Input -. This pin connects to the negative (-) output of the input bridge rectifier.
3	VB1	Direct Input (1). This input pin is used in conjunction with VB2 and connects to pin 4 & 5 of the RJ45 connector - it is not polarity sensitive.BPI-9460S this pin is direct Input +. This pin connects to the positive (+) output of the input bridge rectifier.
4	VB2	Direct Input (2). This input pin is used in conjunction with VB1 and connects to pin 7 & 8 of the RJ45 connector - it is not polarity sensitive.BPI-9460S this pin is direct Input -. This pin connects to the negative (-) output of the input bridge rectifier
5	-VDC	DC Return. This pin is the return path for the +VDC output.
6	+VDC	DC Output. This pin provides the regulated output from the DC/DC converter.
7	ADJ	Output Adjust. The output voltage can be adjusted from is nominal value, by connecting an external resistor from this pin to either the +VDC pin or the -VDC pin.

DC Electrical Characteristics

Note

• 1: Typical figures are at 25°C with a nominal 48V supply and are for design aid only. Not Guaranteed
• 2: The output ripple and noise can be reduced with an external filter, see application note.
• 3: Continuous short circuit duration is applicable at 25'C ambient temperature in free air. At higher temperatures or with restricted airflow (e.g. in a sealed enclosure) the duration will need to be limited to avoid overheating.

RT9460S Typical Connection Diagram

Reducing the output voltage, connect R2 between ADJ and +VDC

	R2 Value	output voltage	R2 Value	output voltage
BPI-9460-3.3V	open	3.3V	0R	2.8V
BPI-9460-5V	open	5V	0R	4.4V
BPI-9460-12V	open	12V	0R	9.9V
BPI-9460-24V	open	24V	30K	18.2V

Increasing the output voltage, connect R1 between ADJ and -VDC

	R1 Value	output voltage	R1 Value	output voltage
BPI-9460-3.3V	open	3.3V	0R	3.7V
BPI-9460-5V	open	5V	0R	5.7V
BPI-9460-12V	open	12V	0R	12.8V
BPI-9460-24V	open	24V	0R	25.5V

Reliability MTBF

About the life time ,we design according to the following: 1)life time of RT9460  : 100,000 hours @ 25°C

Safety test items & test report

Test Requested	Test result
Electric strength	-1500Vrms at 50 to 60Hz for 60s, applied as specified in subclasuse 5.2.2 of IEC 60950 Pass