RT9470

  • 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
  • Industrial temperature range and thermal 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 compliant
  • High performance option available with classification programming, industrial temperature range and thermal protection

Related products

 
 

RT9470

  POE PD Module ( Isolation Model)

Product Description

 

Version

Date

Author

Approved By

Remarks

V1.0

2017/10/14

LI xiao yan

Rock

 

V1.1

2018/8/16

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

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

Description

The RT9470 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 RT9470 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 RT9470 provides a Class classification programming.

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.

    

  • RT9470 Product Selector

 

Part Number

Nominal Output Voltage

Nominal Output current

Maximum Output Power*

Marking

Package

RT9470-3.3V

RT9470S-3.3V

3.3V

2A

6W**

3.3V

SIL

RT9470 -5V

RT9470S -5V

5V

2A

9W**

5V

SIL

RT9470 -12V

RT9470S -12V

12V

1A

12W**

12V

SIL

RT9470 -24V

RT9470S -24V

24V

0.5A

12W**

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

-40

25

85

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.

RT9470S 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.

RT9470S 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.

RT9470S 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.

RT9470S this pin is direct Input -. This pin connects to the negative (-) output of the input bridge rectifier

5

CR+

Class Programming .  external resistor will change the current class of the module (see Poe classification programming table). 

If with no resistor fitted will default to Class 0.

6

CR-

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.

9

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

 

DC Characteristic

Sym

Min

Typ1

Max

Units

Test Comments

1

Nominal Output Voltage

+VDC

 3.1
4.75
11.5
23.5

3.3
 5.0
12.0
24.0

3.5
5.25
12.5
24.5

V
V
V
V

 RT9470-3.3V
 RT9470-5V
 RT9470-12V
 RT9470-24V

2

Output Current (VIN = 48V)

PWR

 

 

  2
  2
1.0
0.5

A
A
A
A

RT9470-3.3V
 RT9470-5V
 RT9470-12V
 RT9470-24V

3

Line Regulation

VLINE

 

0.1

 

%

@ 50% Load

4

Load Regulation

VLOAD

 

1

 

%

@ VIN=48V

5

Output Ripple and Noise

VRN

 

100

 

mVp-p

@ Max load2

6

Minimum Load

RLOAD

200
200
100
 50

 

 

mA
mA
mA
MA

 RT9470-3.3V
 RT9470-5V
 RT9470-12V
 RT9470-24V

7

Short-Circuit Duration3

TSC

 

 

sec

 

8

Efficiency @ 80% Load

EFF

 

76
80
84
85

 

%
%
%
%

 RT9470-3.3V
 RT9470-5V
 RT9470-12V
 RT9470-24V

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.

  • RT9470S Typical Connection Diagram:
  • RT9470 Typical Connection Diagram :
  • Reducing the output voltage, connect R2 between ADJ and +VDC

     

    R2 Value

    output voltage

    R2 Value

    output voltage

     RT9470-3.3V

    open

    3.3V

    0R

    2.8V

     RT9470-5V

    open

    5V

    0R

    4.4V

     RT9470-12V

    open

    12V

    0R

    9.9V

     RT9470-24V

    open

    24V

    30K

    18.2V

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

     

    R1 Value

    output voltage

    R1 Value

    output voltage

     RT9470-3.3V

    open

    3.3V

    0R

    3.7V

     RT9470-5V

    open

    5V

    0R

    5.7V

     RT9470-12V

    open

    12V

    0R

    12.8V

     RT9470-24V

    open

    24V

    0R

    25.5V

    • Poe classification programming table .

    CLASS

    Programming

    Min Power

    Max Power

    Resistance (Ohms)

    (W)

    (W)

    0

    Do not fit

    0.44

    12.95

    1

    698

    0.44

    3.84

    2

    383

    3.84

    6.49

    3

    243

    6.49

    12.95

    4

    TBD

    Reserved

    Reserved

     

    • Reliability MTBF:

    About the life time ,we design according to the following:

    1)  life time of RT9470  : 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

    • 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

  • RT9470 Package Size (mm )
  • RT9470 PCB Decal (mm )
    • Packaging type & Quantity

    EPE or BLASTIC Packaging,  

    55pcs/ dish    

    550pcs/box    Box size 30*35*20cm  7KG/box