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Rt7640 Factory Direct Sales at Poe Module Poe Module at Poe Module 5V25W 12V 30W

Name: Rt7640 Factory Direct Sales at Poe Module Poe Module at Poe Module 5V25W 12V 30W
Brand: Shenzhen Ring&Tone Communicate Co., Ltd
SKU: oxDrvmSOnChR
Price: 6.50 USD
Availability: InStock

US$7.50

1-499 Pieces

US$7.00

500-999 Pieces

US$6.50

1,000+ Pieces

Port:

Shenzhen, China

Production Capacity:

2000000

Payment Terms:

T/T, Paypal

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Shenzhen Ring&Tone Communicate Co., Ltd

Guangdong, China

Last Login Date:

Oct 23, 2025

Main Products:

Slic, FWT, Ring Slic, FXS, FXO

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Product Description

Company Info

Basic Info.

Model NO.

RT7640 5V 12V

Output Type

Single

Warranty

>2 Years

Output Power

1 - 50W

Input Voltage

36-57V

Connection Mode

Series Switching Power Supply

Starting Mode

Self-excited Switching Power Supply

Voltage Regulating Mode

Frequency Modulation Type

Power Supplying System

Terminal Power Distribution Equipment

Energy Transmission

One-way Transmission

Modulation System

PWM

Certification

CE, RoHS, ISO

Brand

Ring&Tone

Origin

China

HS Code

8504902000

Product Description

RT7640
POE PD Module ( Isolation Model)
Product Description

Version	Date	Author	Approved By	Remarks
V5.4	2016/4/5	LI xiao yan	Rock
V5.6	2017/3/8	LI xiao yan	Rock
V5.7	2018/3/8	LI xiao yan	Rock

© 2014 Shenzhen Ring&tone Electronic Technology Co., Ltd. All rights reserved.
This document contains proprietary information of ring&tone and is not to be disclosed or used without the prior written permission of ring&tone.
Due to update and improvement of ring&tone products and technologies, information in this document is subjected to change without notice.

Features:
·IEEE802.3at and IEEE802.3af compliant
·Maximum 30W output power
·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
·Transformer isolation ,1500V isolation (input to output)
·Easy to use, with a minimum number of external components.

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

Description:
The RT7640 series of modules are designed to extract power from a conventional
twisted pair Category 5 Ethernet cable, conforming to the IEEE 802.3af and IEEE 802.3at Power-over-Ethernet(PoE) standard.
The RT7640 signature and control circuit provides the PoE compatibility signature and
power classification required by the Power Sourcing Equipment (PSE) before applying up
to 30W power to the port.
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.

RT7640 Product Selector

Part Number	Nominal Output	Maximum Output Power*	AT-DET putout	Marking	Package
RT7640-12V	12V	30W	YES	RT7640	DIP
RT7640-5V	5V	25W	YES	RT7640	DIP

*At 25°C with VIN = 52V

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.
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.
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.
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.
5	AT-DET+	Internal rectifier bridge output +
6	AT-DET-	AT Detect Output. This pin indicates if an IEEE802.3at PSE is supplying power to the RT7640.
7	CAP-	connect cap-,Internal GND, Do not connect other circuits
8	-VDC	DC Return. This pin is the return path for the +VDC output.
9	-VDC	DC Return. This pin is the return path for the +VDC output.
10	+VDC	DC Output. This pin provides the regulated output from the DC/DC converter.
11	+VDC

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	54	57	V
2	Under Voltage Lockout	VLOCK	30		36	V
3	Operating Temperature2	TOP	-20	25	70	Ta / ^OC
4	Operating Temperature 30W Continuous 24W Continuous 14W Continuous	TOP	-20	25	50 70 85	Ta / °C

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.

DC Electrical Characteristics

	DC Characteristic	Sym	Min	Typ1	Max	Units	Test Comments
1	Nominal Output Voltage	+VDC	11.5	12.0	12.5	V	RT7640-12V
	Nominal Output Voltage	+VDC	4.75	5.0	5.25	V	RT7640-5V
2	Line Regulation	VLINE		0.1		%	@ 50% Load
3	Load Regulation	VLOAD		1		%	@ VIN=48V
4	Output Ripple and Noise	VRN		180		mVp-p	@ Max load2
5	Minimum Load	RLOAD	200			mA
6	Short-Circuit Duration3	TSC			∞	sec
7	Efficiency @ 80% Load	EFF		88		%	12V 1.5A load
	Efficiency @ 80% Load	EFF		88		%	5V @ 3A load
8	Isolation Voltage (I/O)	VISO		1500		VPK	Impulse Test
9	Temperature Coefficient	TC		0.02		%	Per ^OC

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.

Power Classification

The RT7640 classification is fixed at Class 4, this means that an IEEE802.3at Type 1 or an IEEE802.3af PSE will default to Class 0. However an IEEE802.3at PSE will recognise the Class 4 as a Type 2 PD.

AT Detection

The RT7640 has an AT-DET output pin which is used to detect a Two Event Physical Layer classification as described in IEEE802.3at. If required the AT-DET pin can be connected directly to an opto-coupler.
If the RT7640 detects a Two Event Physical Layer classification, the (AT True) switch will close and Opto1 will turn ON. Opto1 will be connected across the isolation barrier and the output collector can be connected to a controller (with a pull-up resistor connected to the controller's power rail). When Opto1 is ON the collector (output) will be Logic 0, the controller will then know that the PSE is capable of delivering over 15.4W. To complete the protocol the controller should then confirm that it is a Type 2 PD over the Data Link Layer*.
If the RT7640 detects a Single Event Physical Layer classification, Opto1 will be OFF and the output collector will be Logic 1 (via pull-up resistor). The controller should then assume that the PSE is limited to delivering up to 15.4W.
If the PSE does not support the Physical Layer classification, Opto1 will be OFF. The RT7640 will operate with non IEEE802.3at compliant POE+ PSE's.
*Note: There are several PSEs (including Cisco) that will only delivery ≤15.4W until they receive Type 2 PD confirmation, over the Data Link Layer.

Address: Matian Street, Guangming District, Shenzhen, Guangdong, China

Business Type: Manufacturer/Factory, Trading Company

Business Range: Computer Products, Electrical & Electronics

Main Products: Slic, FWT, Ring Slic, FXS, FXO

Company Introduction: Shenzhen Ring&AMP; Tone Electronic Technology Co., Ltd. (R-tone Tech) is a leading Subscriber Line Interface Circuit (SLIC) provider in China, which is specialized in research, development and manufacture of sophisticated SLIC circuits and SLIC-related products to meet the needs of customers worldwide.

R-tone Tech, founded in 2002, is a recognized Hi-Tech company. The main products of R-tone Tech cover many fields including SLIC thick film hybrid modules, IP gateway, Wireless desktop phone, USB phone box and etc.

R-tone Tech has a powerful R&AMP; D team to help the customers in the voice interface design of telecommunication equipment such as PCM, PBX, IP gateway, Wireless desktop phone, USB phone. For the great experiences in SLIC design, the company has delivered many products and solutions to reduce the customer's time-to-market and cost-of-products.

All the cost-effective and high-performance analog products of R-tone Tech have self-owned property. R-tone Tech can provide the best service and fastest response to the customers. In the past few years, R-tone Tech held a significant share of the domestic market. With the SKYPE/USB Phone Box delivered, the company had also developed international markets in South Asia, East Asia, the Middle East, Africa, Europe, North and South America. The company sincerely hopes to make a win-win relationship with all the partners worldwide.

R-tone Tech is making efforts to become a top-level analog voice solutions provider in China and a professional communications technologies enterprise in the world.

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