RT3203
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 9V-12V 18V-24V
Transformer isolation ,1500V isolation (input to output)
Easy to use, with a minimum number of external components.
Rohs compliant
Related products
RT3203
Version
Date
Author
Approved By
Remarks
V1.0
2021/10/14
LI xiao yan
Rock
© 2012 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 RT3203 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 RT3203 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 RT3203 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.
Part Number
Output Voltage
Nominal Output current
Maximum Output Power*
Marking
Package
RT3203 -12V
9V-12V
1A
15W**
12V
SIL
RT3203 -24V
18V-24V
0.5A
15W**
24V
SIL
RT3203S -12V
9V-12V
1A
15W**
12V
SIL
RT3203S -24V
18V-24V
0.5A
15W**
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
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
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 #
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.
RT3203S 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.
RT3203S 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.
RT3203S 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.
RT3203S this pin is direct Input -. This pin connects to the negative (-) output of the input bridge rectifier
5
RA
Output Adjust resistance. The output voltage can be adjusted from is nominal value, by connecting an external resistor from this pin
6
RB
7
-VDC
DC Return. This pin is the return path for the +VDC output.
8
+VDC
DC Output. This pin provides the regulated output from the DC/DC converter.
DC Characteristic
Sym
Min
Typ1
Max
Units
Test Comments
1
Nominal Output Voltage
VDC+
11.5
23.5
12.0
24.0
12.5
24.5
V
V
RT3203-12V
RT3203-24V
2
Output Current (VIN = 48V)
PWR
1.0
0.5
A
A
RT3203-12V
RT3203-24V
3
Line Regulation
VLINE
2
%
@ 50% Load
4
Load Regulation
VLOAD
2
%
@ VIN=48V
5
Output Ripple and Noise
VRN
100
mVp-p
@ Max load2
6
Minimum Load
RLOAD
100
50
mA
MA
RT3203-12V
RT3203-24V
7
Short-Circuit Duration3
TSC
∞
sec
8
Efficiency @ 80% Load
EFF
87
87
%
%
RT3203-12V
RT3203-24V
9
Isolation Voltage (I/O)
VISO
1500
VPK
Impulse Test
10
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.
About the life time ,we design according to the following:
1) life time of RT3203 : 100,000 hours @ 25°C
2) RT3203 use a Aluminum Electrolytic Capacitors Life Calculation:2000 hour@105 degree
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
Mechanical / Environmental Performance data
Item
Requirement and Standard
1
Resistance to Wave Soldering Heat
max Preheat Temp range & time 120 ℃ / 180S
max soldering temp &time:265 ℃ / 4S
2
Solder ability
Solder able area shall have minimum of 95% solder coverage.
And then into solder bath,Temperature at 245 ±5 ℃ , for 4-5sec.
3
Hand Soldering Temperature Resistance
T > =350 ℃ , 3sec at least.
4
Thermal Shock
subject to follow condition for 5 cycles.1 cycles:
-55 ℃ , 30 minutes
+85 ℃ , 30 minutes
5
Humidity(Temp Cycling)
less than 95% (non-condensing) ( -20 to 70 ℃)
6
Temperature Life
temperature life at 85℃ for 96 hours.
7
Salt Spray
connectors to 5% salt-solution concentration, 35 ℃
Gold flash for 8 hours there will be no change in the gold layer
