RT7630
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.
RT7630
AT POE PD Module ( Isolation Model)
Product Description
Version
Date
Author
Approved By
Remarks
V5.3
2015/10/26
LI xiao yan
Rock
V6.2
2017/6/01
LI xiao yan
Rock
Optimize for tablet applications
V6.4
2017/7/11
LI xiao yan
Rock
© 2015 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:
Applications:
Description:
The RT7630 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 RT7630 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.
Part Number
Nominal Output
Maximum Output Power*
Marking
Package
RT7630
12V 2A
30W
RT7630
38*39
*At 25°C with VIN = 54V Short-term or low-temperature environment.
Pin #
Name
Connector and Pin Description
J1
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.
J2
1
DC+
DC output +12V
2
DC-
DC Return -12V
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.
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
4
Operating Temperature
30W Continuous
24W Continuous
14W Continuous
TOP
-20
25
30
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 Characteristic
Sym
Min
Typ1
Max
Units
Test Comments
1
Nominal Output Voltage
+VDC
11.5
12.0
12.5
V
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
87
%
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.
The RT7630 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.