Delta Electronics IPM- C Series Manual de usuario

Delta Electronics, Inc.

1.0Purpose

This document guides the user in performing

electronic measurements on an IPM POL (point

of load) DC/DC converter using the Delta

Evaluation Board.

2.0 Relevant Documentation

The documentation and background information

listed below is relevant to this evaluation

procedure:

․Applicative date sheets for IPM Series unit

under evaluation.

․Power Module Evaluation Board Schematic.

․Power Module Evaluation Board Layout.

․General Test and Safety Procedures.

IPM Series

Evaluation Procedure

EP_IPMC_04292005

Evaluation Procedure

(DEP-003)

The IPM- C Series POL converters

The IPM Series, single output, non-isolated

point of load DC/DC converters, are the latest

offering from a world leader in power systems

technology and manufacturing ―Delta

Electronics, Inc. They operate from a

3V~5.5V (IPM04C) or an 8V~14V (IPM12C)

source and provide a programmable output

voltage of 0.8V to 3.3V(IPM04C) or 0.8V to

5V(IPM12C). With creative design technology

and optimization of component placement,

these converters possess outstanding

electrical and thermal performance, as well

as offering extremely high reliability under

highly stressful operating conditions. All

models are protected against abnormal

input/output voltage and current conditions.

This document guides the user through the

evaluation procedure to qualify a POL module.

The data shown in this Evaluation Procedure

is for the SIP and SMT Package Type PO

evaluation board. Please refer to the

appropriate technical data sheet for detailed

performance and technical information for the

specific POL units.

3.0 Equipment Required

․DC Power Supply 0 - 20 V @ 0 - 20A (Agilent 6574A 0 -60V/0 - 35A or equivalent).

․Oscilloscope (Tektronix TDS 460A or equivalent) 4 Channel 400 MHz, equipped with a

x1 scope probe, a x10 scope probe, and two BNC cables (length less than 20

inches/500mm)

․Digital multimeters, one with 20A range and ideally all with 4 1/2 digit resolution

(DVM1, DVM2 and DVM3) (Zentech 2041 or equivalent).

․Electronic load (Chroma 63030 or equivalent), 300W approx rating, or a suitable

resistive load.

․DC power supply (GW GPC-3060D or equivalent).

4.0 Equipment Set-Up and Description

Please refer to the Power Module Evaluation Board Layout (see page 15) for reference designators

cited in this document and Figure 1 is the Set-up Diagram.

Figure 1. Set-up Diagram

4.1 Connect one lead from the “+” lead of the power supply to the “20A” terminal of the first

4.2 Connect one wire from the “-” lead of the power supply (Item 3.1) to the “Vin-“ pin of the

4.3 Connect the plus “+” and minus “-“ connection leads from a second multimeter to the “SVin+”

4.4 Connect the plus “+” and minus “-“ connection leads from the third multimeter to the “SVout+”

4.5 Connect a BNC cable (length less than 20 inches/500mm) from BNC1 of the Evaluation Board

4.6 Connect a BNC cable (length less than 20 inches/500mm) from BNC2 of the Evaluation Board

4.7 Connect the positive and negative power leads of the electronic load (ensuring correct polarity),

.8 For IPM04C series: Open J2 on the Evaluation Board. Connect one lead from the “+” lead of the

.0 Thermal Management of the Converter

o the converter at all times during all

multimeter DMM1. Then connect one lead from the “Common” of the DMM1 to the “Vin” pin of

the Evaluation Board. Set function of DMM1 to DCA to measure the input current.

Evaluation Board. Note: Use stranded leads at least equivalent to 14 AWG for all connections

in sections 4.1 and 4.2.

and “SVin-” Pins on the Evaluation Board. This multimeter is designated DMM2 to measure the

input voltage.

and “SVout-” Pin on the Evaluation Board. The multimeter is designated DMM3. DMM3 is used

to measure the output voltage.

to Channel 1 of the oscilloscope (item 3.2). This cable is used to measure the input voltage

(between SVin+ and SVin-).

to Channel 2 of the oscilloscope. This cable is used to measure the output voltage (between

SVout+ and SVout-).

or an appropriate resistive load, to the Evaluation Board output terminal pin (“+Vout” for positive

power lead and “-Vout” for the negative power lead).

power supply to the “12Vcc” on the Evaluation Board. Then connect one lead from the “-” of

the power supply to the “12VGND” on the Evaluation Board. For IPM12C: short J2 on the

Evaluation Board.

It is imperative that sufficient airflow should be provided t

portions of testing. Please refer to the applicative data sheet for the proper cooling and derating

necessary to achieve accurate results when testing the converter.

6.0 Tests Performed

performed at room temperature (+25 C).

6.1  Input Voltage Range.

ut.

6.2 O

 Line Regulation.

t-Point Adjustment Range.

6.3 D Maximum Output Voltage Deviation (due to step change in load).

6.4

Efficiency

part number of the power module to determine that the correct module is

being evaluated. Note: IPM12C0A0S04A and IPM04C0A0S06A would denote the SMT

2) t multimeters DMM2 and DMM3

to DC voltage, auto ranging.

Turn on the Electronic Load (or resistive load) and adjust the current level. The maximum

nt is 4A for the model IPM12C0A0R04A series and 6A for the model

4) ble or disable the converter. Turn SW1 to the OFF position to enable

e converter, and turn SW1 to the ON position to disable the converter.

5) position if this

nction is not being used. Turn SW2 to the ON position if the Transient function test is

The following tests are

Input Characteristics

 Under-Voltage Locko

 No Load Input Current

utput Characteristics

 Load Regulation.

 Output Regulation

 Output Voltage Se

ynamic Characteristics



 Turn on Response time.

Thermal Characteristic



7.0 T

st Set-Up

7.1 Initial Set-Up

1) Examine the

package, while IPM12C0A0R04A and IPM04C0A0R06A would denote the SIP package.

This Evaluation Board can be used for both packages.

Set multimeter DMM1 to the DC current 20A range. Se

Electronic Load

rated output curre

IPM04C0A0R06A series. Ensure the output load does not exceed the recommended

maximum current.

SW1 is used to ena

SW2 is used for On/Off Transient function test. Turn SW2 to the OFF

required.

6) ed for the trim-down or trim-up setting of the Output Voltage. For IPM, if the

converter requires a trim up, set SW3 to the Trim-up position. If the converter requires a

7) l

resistors. For IPM12C0A0R04A, if the converter requires a trim-up to 5V, set the SW4_1

8) rim-up, set the SW4_2 to

ON position and SW3 to trim-up position. If the converter requires a trim-down, set the

Subdivide switch NO. For adjustable output

module

For constant output

module

trim down, set SW3 to the Trim-down position. For normal operating, turn off the SW3.

SW4 and SW5 are used for the Output Voltage Set-Point Adjustment by externa

to ON position and SW3 to trim-up position. If the converter requires a trim-down to 0.8V,

set the SW5_8 to ON position and SW3 to trim-down position.

For constant output voltage module, if the converter requires a t

SW5_8 to ON position and SW3 to trim-down position. Please refer to the Function

Tables below for the setting details.

SW4 Function Table

SW4_1 5.0V setting 5.0V trim up

SW4_2 3.3V setting 3.3V trim up

SW4_3 2.5V setting 2.5V trim up

SW4_4 1.8V setting 1.8V trim up

SW4_5 1.5V setting 1.5V trim up

SW4_6 1.2V setting 1.2V trim up

SW4_7 1.0V setting 1.0V trim up

SW4_8 0.95V setting 0.9V trim up

Note: Settings of SW4_1 and SW4_7 are for IPM12C se

Subdivide switch NO. For adjustable output

module

For constant output

module

ries only

SW5 Function Table

SW5_1 - 5.0V trim down

SW5_2 - 3.3V trim down

SW5_3 - 2.5V trim down

SW5_4 - 1.8V trim down

SW5_5 - 1.5V trim down

SW5_6 - 1.2V trim down

SW5_7 - 1.0V trim down

SW5_8 0.80V setting 0.9V trim down

SW3 is us

7.2 Initial Power Up

supply ON, set the current limit on power supply (refer to specification of

either converter) and increase the input voltage (use DMM2 to monitor the voltage) until it

3) ing, which can be verified by observing the DMM3 (appropriate

ope (appropriate value

8.0 Tests and Evaluation

nge and Under-Voltage Lockout

d from 3.0Vin to 5.5Vin. For

e output of 3.3V, the input voltage range is from 4.0Vin to 5.5Vin. The IPM12C Series

) Turn on the fan.

t the input voltage to the desired operating point while monitoring DMM2.

1 to the “OFF” position to enable the converter.

nnel 1 of the

onverter reaches the

8.1.

) Set the input voltage to the desired operating point while monitoring DMM2.

1 to the “OFF” position to enable the converter.

ter.

round 20 to 85mA for the IPM12C series and around

nder evaluation. (Please

1) Turn the power

reaches the desired value.

Set the switch SW1 to “OFF” position to enable the power module.

The converter is now operat

value for the nominal output voltage) and channel 2 of the oscillosc

for the nominal output voltage).

Set the switch SW1 to the “ON” position after performing each test.

8.1 Input Characteristics

8.1.1 Input Voltage Ra

The IPM04C Series of DC/DC converters will operate at full loa

DC/DC converters will operate at full load from 8Vin to 14Vin for 12Vin (nominal) types. The

converters feature input under-voltage protection, which will not allow the converter to start

up unless the input voltage exceeds the turn-on voltage threshold.

Test

2) Se

3) Set the switch SW

4) Test the input under voltage function while observing DMM2, DMM3 and cha

oscilloscope. Increase the input voltage until the output of the c

appropriate value. This will occur between 2.40 and 2.70 volts for IPM04C modules and

between 7.6 to 8.0 volts for IPM12C modules. Please refer to the appropriate converter

data sheet for the detailed specification.

2 No Load Input Current Test

1) Turn on the fan.

3) Set the switch SW

4) Remove/disable the output electronic load or resistive load.

5) Note the input current from DMM1.

6) The result is the No-Load Input current of the DC/DC conver

The No-Load Input Current will be a

20 to 70mA for the IPM04C series depending on the model u

refer to the data sheet for the detailed specification).

8.2 Output Characteristics

Line Regulation Deviation is defined as the change in output voltage caused by varying the

ied range while the output load and temperature remain constant.

2 Set the output power to the desired operating point.

t the switch SW1 to the “OFF” position to enable the converter.

8.2.1 Line Regulation

input voltage over a specif

Test

1) Turn on the fan.

)

3) Se

djust the input voltage across the converter’s input range (refer to specified range) while

full range of the input

Load Regulation Deviation is defined as the changes in output voltage caused by varying the

e specified range (no load to full load) while the input voltage and

mperature remain constant.

) Set the input voltage to the desired operating level while monitoring DMM2.

t the switch SW1 to the “OFF” position to enable the converter.

load across the converter’s operating load range.

the operating

ion).

Output Ripple is defined as the periodic AC component on the DC/DC converter’s output

le is measured in terms of peak to peak and RMS values, both done

ith a specific bandwidth.

) Set the switch SW1 to the “OFF” position to enable the converter.

just the input voltage while monitoring DMM2 and set the output load to the full rated

nd 10mV/Div using the

5) ple of the DC/DC converter is measured at full load operating power.

monitoring DMM2.

5) Note the maximum +/- deviation of the output voltage over the

operating voltage (please refer to the data sheet for the detailed specification).

8.2.2 Load Regulation

output load current over th

Test

1) Turn on the fan.

3) Se

4) Adjust the output

5) Note the maximum +/- deviation of the output voltage over the full range of

load range (please refer to the data sheet for the detailed specificat

8.2.3 Output Ripple

voltage. The output ripp

Test

1) Turn on the fan.

3) Ad

load current.

4) Adjust channel 2 on the oscilloscope to be AC coupled at 1µS/Div a

20 MHz bandwidth-limit option on the scope.

The output rip

.2.4 Output Voltage Set-Point Adjustment Range (Trim)

utput Voltage Set-Point Adjustment can be carried out by using an external resistor or

e set-point (please refer to

ments to Item 7.1-6,

ries

between the

TRIM pin and ground. For IPM12C0A0R04A, Please refer to the IPMR table for the desired

trim-up can be calculated by the following equation and the datasheet can

external voltage source to increase or decrease the output voltag

e data sheet for the detailed specification). Refer all trim voltage requireth

7.1-7, 7.1.8, and refer all the design numbers to Evaluation Board Schematic.

(1) Output Voltage Set-Point Adjustment by using an external resistor

For IPM12C se

To implement Trim-up by using an external resistor, Rtrim-up must be connected

Vout. The value of R

also be referred for further information.

Ω−

−

−k

Ruptrim 261.0

9.0

752.3

out

To implement Trim-down by using an external resistor, Rtrim-down must be connected between

the TRIM pin and Vout. For IPM12C0A0R04A, Please refer to the IPMR table for the desired

out. The value of R can be calculated by the following equation and the datasheet

Vtrim-down

can also be referred for further information.

Ω−

−

−k

Rdowntrim 621.5

9.0

072.1

out

IPMR: Rtrim values versus some commonly used Vout for IPM12C0A0R04A.

Vout Rtrim (Ω)

0.800 5.09K

0.900 Open

1.0 37.2K

1.2 12.2K

1.5 5.98K

1.8 3.90K

2.5 2.08K

3.3 1.30K

5.0 653

For I M04C series

o implement Trim-up by using an external resistor, Rtrim-up must be connected between the

d. For IPM04C0A0R06A, Please refer to the IPMR table for the desired

TRIM pin and groun

Vout. The value of Rtrim-up can be calculated by the following equation and the datasheet can

also be referred for further information.

Ω−

−k

out

uptrim 187.0

9.0

0.7

To implement Trim-down by using an external resistor, Rtrim-down must be connected between

e TRIM pin and Vout. For IPM04C0A0R06A, Please refer to the IPMR table for the desired

−

Vout. The value of Rtrim-down can be calculated by the following equation and the datasheet

can also be referred for further information.

Ω−

−

−k

out

downtrim 187.10

9.0

0.2

IPMR: Rtrim values versus some commonly used Vout for IPM04C0A0R06A.

Vout Rtrim (Ω)

0.8 9.813K

0.9 Open

1.2 23.146K

1.5 11.479K

1.8 7.590K

2.5 4.188K

3.3 2.729K

Test

1) Turn on the fan.

just the input voltage while monitoring DMM2 and with output load set to the desired

2) Ad

operating point.

3) Set the enable switch SW1 to the “OFF” position to enable converter.

4) Use SW3, SW4 and SW5 (refer to Item 7.1_7) for Trim setup.

5) Note the voltage by observing DMM3.

6) Test the Load Regulation (refer to Item 8.2.2).

(2) Output Voltage Set-Point Adjustment by using an external voltage source

For IPM12C series

Output voltage of IPM12C is programmable while applying a voltage between the TRIM

and GND pins. The following equation can be used to determine the value of Vtrim

needed for a desired output voltage Vo:

Vtrim = 0.7439 – 0.0488Vo

Vtrim is the external voltage in V

Vo is the desired output voltage

For example, to program the output voltage of a IPM

module to 3.3 Vdc, Vtrim is calculated as follows:

Vtrim = 0.7439 – 0.0488 x 3.3

= 0.5829V

For IPM04C series

Output voltage of IPM04C is programmable while applying a voltage between the TRIM

and GND pins. The following equation can be used to determine the value of Vtrim

needed for a desired output voltage Vo:

Vtrim = 0.7168 – 0.0187Vo

Vtrim is the external voltage in V

Vo is the desired output voltage

For example, to program the output voltage of a IPM

module to 3.3 Vdc, Vtrim is calculated as follows:

Vtrim = 0.7168 – 0.0187 x 3.3

= 0.655V

Figure 2. Configuration for programming output voltage using an external voltage source

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