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

Click to download the detailed PDF file

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

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：

RT9470_POE PD_SPEC_V1.1(1)

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

6W**

3.3V

SIL

RT9470 -5V

RT9470S -5V

9W**

SIL

RT9470 -12V

RT9470S -12V

12V

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

DC Supply Voltage

VCC

-0.3

DC Supply Voltage Surge for 1ms

VSURGE

-0.6

Storage Temperature

-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

Input Supply Voltage1

VIN

Under Voltage Lockout

VLOCK

Operating Temperature2

TOP

-40

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

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.

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.

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.

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

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.

CR-

-VDC

DC Return. This pin is the return path for the +VDC output.

+VDC

DC Output. This pin provides the regulated output from the DC/DC converter.

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

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

Output Current (VIN = 48V)

PWR

2
2
1.0
0.5

A
A
A
A

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

Line Regulation

VLINE

0.1

@ 50% Load

Load Regulation

VLOAD

@ VIN=48V

Output Ripple and Noise

VRN

100

mVp-p

@ Max load2

Minimum Load

RLOAD

200
200
100
50

mA
mA
mA
MA

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

Short-Circuit Duration3

TSC

∞

sec

Efficiency @ 80% Load

EFF

76
80
84
85

%
%
%
%

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

Isolation Voltage (I/O)

VISO

1500

VPK

Impulse Test

Temperature Coefficient

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

2.8V

RT9470-5V

open

4.4V

RT9470-12V

open

12V

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

3.7V

RT9470-5V

open

5.7V

RT9470-12V

open

12V

12.8V

RT9470-24V

open

24V

25.5V

Poe classification programming table .

CLASS

Programming

Min Power

Max Power

Resistance (Ohms)

(W)

Do not fit

0.44

12.95

698

0.44

3.84

383

3.84

6.49

243

6.49

12.95

TBD

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

Item

Requirement and Standard

Resistance to Wave Soldering Heat

max Preheat Temp range & time 120 ℃ / 180S
max soldering temp &time:265 ℃ / 4S

Solder ability

Solder able area shall have minimum of 95% solder coverage.
And then into solder bath,Temperature at 245 ±5 ℃ , for 4-5sec.

Hand Soldering Temperature Resistance

T > =350 ℃ , 3sec at least.

Thermal Shock

subject to follow condition for 5 cycles.1 cycles:
-55 ℃ , 30 minutes
+85 ℃ , 30 minutes

Humidity(Temp Cycling)

less than 95% (non-condensing) ( -20 to 70 ℃)

Temperature Life

temperature life at 85℃ for 96 hours.

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

RT9470

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