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

 
 

 

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

  • 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

 

Applications

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

  

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.

    

  • RT3203 Product Selector

 

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

  • 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.

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 Electrical Characteristics

 

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.

  • RT3203S Typical Connection Diagram :
  • RT3203 Typical Connection Diagram :
    • Reliability MTBF:

    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  

    • 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

     

     

     

     

    • Mechanical / Environmental Performance data

    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

     

     

    • RT3203 Package Size (mm )
    • RT3203 PCB Decal (mm )