MCC MIIC-203 Uživatelská příručka stáhnout pdf (Strana 2)

ATC210 Evaluation Board | User Guide 207

. Introduction

The ATC210 Evaluation Board is designed to demonstrate the many

capabilities of Artesyn’s ATC210 converter. The ATC210 converter is

a high density, dual-input, dual-output, 210 W Bus Converter

designed to meet the requirements of the PICMG 3.0 Advanced TCA

Base Specification telecommunication standard. This converter is

designed to greatly simplify the power input requirements of the

ATCA system boards by integrating all the necessary components

(except hold-up capacitors) while operating on either of two isolated

-48 Volt power inputs and providing two low voltage (12 V and 3.3 V)

power outputs. Internally the ATCA converter contains, isolated

ORing diodes, a hot swap controller, a 41.5 V hold-up voltage clamp

to allow the use of small 50 V hold-up capacitors, an input

conducted EMI filter, highly efficient 12 Vdc and 3.3 Vdc converters,

a separate 12 V output switch, and a microcontroller based I

interface circuit.

The ATC210 converter offers a wide input voltage range of –36 Vdc

to -72 Vdc and can operate over an ambient temperature range of

-25 °C to +85 °C. Ultra-high efficiency operation is achieved through

the use of proprietary synchronous rectification and control

techniques. The module is fully protected against overcurrent,

overvoltage and overtemperature conditions. Standard features

include isolated remote ON/OFF, A_OK and B_OK power-good

indicators simplified 3.3 V margining, and I

C power and temperature

monitoring.

2. Evaluation Board Functionality

The evaluation board will function when an ATC210 converter is

either soldered or connected through pin sockets (jacks) to the

Evaluation Board, a voltage between -36 Vdc to –72 Vdc (valid

voltage) is applied to either –48V_A and RTN_A (“A” inputs), -48V_B

and RTN_B (“B” inputs), and both Enable_A and Enable_B are

switched on.

2.1 A_OK# and B_OK# LEDs

When Enable_A and Enable_B are switched on and a valid voltage is

applied to the “A” inputs, the A_OK# LED will light and likewise when

a valid voltage is applied to the ”B” inputs, B_OK# LED will light.

When a valid voltage is applied to both inputs, both LEDs will light.

In practice, the enable pins ar

e the last to make contact. When they

do make contact, they connect to their respective Returns, and are

effectively the ‘green light’ for the ATCA power converter to start-up.

So, with both enables switched to the ‘on’ position, and with either

or both input feeds connected, the unit turns on.

2.2 Converter V

oltage LED

The Converter V

oltage LED will light when power is available to the

internal IBC -48 Vdc to 12 Vdc converter.

2.3 Clamp Voltage LED

When the input voltage on the hold-up capacitors rises to above 41

volts approximately, the Clamp Voltage LED will light to indicate that

the 50 V hold-up capacitors are charged to the minimum

requirement, to give a 5 ms hold-up time at maximum output load of

210 W

atts.

2.4 3.3 Volt LED

The 3.3 V output LED will light when 3.3 V power is available at the

3.3 V output terminals. The 3.3 V output LED will not light if the 3.3 V

output voltage is less than 3.0 Volts. The 3.3 V output can drive up to

a maximum load of 1.8 A.

File Name: an_atc210_evalbd.pdf Rev: 16 Aug 2006

2.5 3.3 Vout Margin Switch

Once the 3.3 V power is available, the 3.3 V output voltage can be

increased or decreased by approximately 5% by switching the

margin switch either HIGH or LOW.

2.5.1 Margin Switch Setting

• High 3.3 V output = 3.47 V

•

ormal

.3 V output = 3.32 V

•

Low 3.3 V output = 3.16 V

2.6 12 V O/P Enable Switch

This switch is effectively the remote control input. It is referenced to

the secondary side, and uses the 3.3 V output to enable/disable the

12 V output.

2.7 12 V LED

The 12 V output LED will light when the 12 V is switched ON and

power is available at the 12 V output terminals. The 12 V output LED

will not light if the 12 V output voltage is less than 11.3 V. The 12 V

output can drive up to a maximum load of 17.5 A including the 1 W

on board fan. The 12 V fan will operate when 12 V is available on the

12 V output. The fan can also be powered by an external 12 V

supply.

2.8 Interrupt LED

This LED will light whenever the interrupt line is active low. An

interrupt occurs whenever an internal parameter limit is violated. The

limits can be changed from the default values via the I

C bus.

3. Connecting Up and Interfacing the I

C Bus

This section describes in detail how to connect and install the

software.

The following list of items are supplied:

• Evaluation Board with ATC210 converter attached

• iPort/AFM RS-232 to I

C Bus Host Adaptor

• I

C Interface Cable

• RS-232 Serial Port Cable, 9F/25M

• Mains Power Supply

Download the ATC210 Evaluation Board Interface Program from

the Artesyn web site via the following link:

http://www.artesyn.com/registration/resource/ResourceProvi

der?target=/media/pdfs/atc210_sw_download.zip

2. Install the downloaded ATC210, there may be a need to load

Microsoft’s .Net Framework version 1.1. This software is

available via the following link:

http://www

.micr

osoft.com/downloads/details.aspx?FamilyID

=262d25e3-f589-4842-8157-034d1e7cf3a3&displaylang=en

3. Connect the RS-232 cable between the iPort and the serial port

of the PC. If there is more than one serial port, the Interface

Program will connect automatically. The ‘pull-ups’ switch on the

iPort must be left in the default ‘off’ position when operating with

this Evaluation board. The iPort is manufactured by MCC, p/n

MIIC-203G, www.mcc-us.com.

4. Connect the I

C Interface Cable between the Evaluation board

and the iPort.

5. Plug the 5 V power supply into the ac outlet using the

appropriate Adaptor. Connect the other end to the iPort.

6. Double click on the A

TC210 I

C icon that is on the desktop to

start the program.

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