DCL04S0A0S12NFA [DELTA]

Non-Isolated Point of Load DC/DC Power Modules: 2.4-5.5Vin 0.6-3.3V/3Aout; 负荷DC / DC电源模块非隔离点： 2.4-5.5Vin 0.6-3.3V / 3Aout


型号：	DCL04S0A0S12NFA
厂家：	DELTA ELECTRONICS, INC.
描述：	Non-Isolated Point of Load DC/DC Power Modules: 2.4-5.5Vin 0.6-3.3V/3Aout 负荷DC / DC电源模块非隔离点： 2.4-5.5Vin 0.6-3.3V / 3Aout 电源电路
文件：	总19页 (文件大小：713K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

DCT04S0A0S03NFA

FEATURES



High efficiency: 96.5% @ 5.0Vin, 3.3V3A out

Small size and low profile:

12.2x 12.2x 7.25mm (0.48”x 0.48”x 0.29”)

Surface mount packaging



Standard footprint

Voltage and resistor-based trim

Pre-bias startup

Output voltage tracking

No minimum load required

Output voltage programmable from

0.6Vdc to 3.3Vdc via external resistor

Fixed frequency operation



Input UVLO, output OCP

Remote on/off

ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing facility

UL/cUL 60950-1 (US & Canada)



Delphi DCT, Non-Isolated Point of Load

DC/DC Power Modules: 2.4-5.5Vin,

0.6-3.3V/3Aout

OPTIONS



Positive on/off logic

The Delphi Series DCT, 2.4-5.5V input, 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. The DCT series

provides a programmable output voltage from 0.6V to 3.3V

using an external resistor and has flexible and

programmable tracking features to enable a variety of startup

voltages as well as tracking between power modules. This

product family is available in surface mount and provides up

to 3A of output current in an industry standard footprint. With

creative design technology and optimization of component

placement, these converters possess outstanding electrical

and thermal performance, as well as extremely high

reliability under highly stressful operating conditions.



Tracking feature

APPLICATIONS



Telecom / DataCom

Distributed power architectures

Servers and workstations

LAN / WAN applications

Data processing applications

DATASHEET

DS_ DCT04S0A0S03NFA _05292012

E-mail: DCDC@delta.com.tw

http://www.deltaww.com/dcdc

TECHNICAL SPECIFICATIONS

PARAMETER

NOTES and CONDITIONS

DCT04S0A0S03NFA

Min.

Typ.

Max.

Units

ABSOLUTE MAXIMUM RATINGS

Input Voltage (Continuous)

Tracking Voltage

Operating Ambient Temperature

Storage Temperature

-0.3

-40

Vin,max

Vdc

°C

-55

125

°C

INPUT CHARACTERISTICS

Operating Input Voltage

Input Under-Voltage Lockout

Turn-On Voltage Threshold

Turn-Off Voltage Threshold

Maximum Input Current

No-Load Input Current

Vo ≦ Vin –0.6

2.4

5.5

2.2

2.0

A2S

Vin=2.4V to 5.5V, Vo=1.8V, Io=Io,max,

Vin=5V

3.25

Off Converter Input Current

Inrush Transient

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 1μH source impedance; VIN =0 to 5.5V, Io= Iomax ;

mAp-p

Input Ripple Rejection (120Hz)

OUTPUT CHARACTERISTICS

with 0.5% tolerance for

external resistor used to set output voltage)

Output Voltage Set Point

-1.5

0.6

Vo,set

+1.5

3.3

% Vo,set

Output Voltage Adjustable Range

Output Voltage Regulation

For Vo>=2.5V

For Vo<2.5V

For Vo>=2.5V

For Vo<2.5V

0.4

% Vo,set

Over Line

Over Load

Ta=-40℃ to 85℃

Over Temperature

0.4

+3.0

% Vo,set

Total Output Voltage Range

Output Voltage Ripple and Noise

Peak-to-Peak

Over sample load, line and temperature

5Hz to 20MHz bandwidth

Full Load, 1µF ceramic, 10µF tantalum

-3.0

RMS

Output Current Range

Output Voltage Over-shoot at Start-up

Output DC Current-Limit Inception

Output Short-Circuit Current (Hiccup Mode)

DYNAMIC CHARACTERISTICS

Vout=3.3V

Hiccup mode,

Io,s/c

% Vo,set

% Io

Adc

250

10µF Tan & 1µF Ceramic load cap,

2.5A/µs,Co=47u,Vin=5V,Vo=1.8V

0-50% Iomax

Dynamic Load Response

Positive Step Change in Output Current

Negative Step Change in Output Current

Settling Time to 10% of Peak Deviation

Turn-On Transient

180

500

µs

50% Iomax-0

Io=Io.max

Start-Up Time, From On/Off Control

Start-Up Time, From Input

Output Voltage Rise Time

Von/off, Vo=10% of Vo,set

Vin=Vin,min, Vo=10% of Vo,set

Time for Vo to rise from 10% to 90% of Vo,set

Full load; ESR ≧0.15mΩ

Full load; ESR ≧10mΩ

µF

Output Capacitive Load

1000

3000

EFFICIENCY

Vo=3.3V

Vo=2.5V

Vo=1.8V

Vo=1.5V

Vo=1.2V

Vo=0.6V

Vin=5V, 100% Load

96.5

95.5

93.5

92.0

90.0

83.0

FEATURE CHARACTERISTICS

Switching Frequency

ON/OFF Control, (Negative logic)

Logic Low Voltage

Logic High Voltage

Logic Low Current

Logic High Current

ON/OFF Control, (Positive Logic)

Logic High Voltage

Logic Low Voltage

Logic Low Current

Logic High Current

0Tracking Slew Rate Capability

Tracking Delay Time

Tracking Accuracy

600

kHz

Module On, Von/off

Module Off, Von/off

Module On, Ion/off

Module Off, Ion/off

-0.2

Vin-0.8

Vin-1.6

Vin,max

200

µA

0.2

Module On, Von/off

Module Off, Von/off

Module On, Ion/off

Module Off, Ion/off

1.6

-0.3

Vin,max

0.3

µA

V/msec

0.1

Delay from Vin.min to application of tracking voltage

Power-up

2V/mS

100

Power-down 1V/mS

GENERAL SPECIFICATIONS

MTBF

Weight

Io=80% of Io, max; Ta=25°C

2.0

M hours

grams

(T_A= 25°C, airflow rate = 300 LFM, V_in=2.4Vdc to 5.5Vdc, nominal Vout unless otherwise noted.)

DS_DCT04S0A0S03NFA_05292012

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ELECTRICAL CHARACTERISTICS CURVES

Figure 1: Converter efficiency vs. output current (0.6V out)

Figure 2: Converter efficiency vs. output current (1.2V out)

Figure 3: Converter efficiency vs. output current (1.5V out)

Figure 4: Converter efficiency vs. output current (1.8V out)

Figure 5: Converter efficiency vs. output current (2.5V out)

Figure 6: Converter efficiency vs. output current (3.3V out)

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ELECTRICAL CHARACTERISTICS CURVES (CON.)

Figure 7: Output ripple & noise at 5Vin, 0.6V/3A out. (2us/div and

Figure 8: Output ripple & noise at 5Vin, 1.2V/3A out. (2us/div and

5mV/div)

Figure 9: Output ripple & noise at 5Vin, 1.8V/3A out. (2us/div and

Figure 10: Output ripple & noise at 5Vin, 3.3V/3A out. (2us/div and

5mV/div)

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Figure 11: Turn on delay time at 5Vin, 0.6V/3A out(2mS/div),Top

Figure 12: Turn on delay time at 5Vin, 1.2V/3A out(2mS/div),Top

trace:Vout 0.2V/div; bottom trace:Vin,5V/div

trace:Vout 0.5V/div; bottom trace:Vin,5V/div

DS_DCT04S0A0S03NFA_05292012

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Electrical Characteristics Curves (con.)

Figure 13: Turn on delay time at 5Vin, 1.8V/3A out(2mS/div),Top

Figure 14: Turn on delay time at 5Vin, 3.3V/3A out(2mS/div),Top

trace:Vout 1V/div; bottom trace:Vin,5V/div

trace:Vout 2V/div; bottom trace:Vin,5V/div

Figure 16: Turn on delay time at remote on/off, 3.3V/3A

out(2mS/div),Top trace:Vout 2V/div; bottom trace: on/off,2V/div

Figure 15: Turn on delay time at remote on/off, 0.6V/3A

out(2mS/div),Top trace:Vout 0.2V/div; bottom trace: on/off,2V/div

Figure 17: Turn on delay time at remote turn on with external

Figure 18: Turn on delay time at remote turn on with external

capacitors (Co= 3000 µF) 5Vin, 3.3V/3A out

capacitors (Co= 3000 µF) 3.3Vin, 2.5V/3A out

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ELECTRICAL CHARACTERISTICS CURVES

Figure 19: Typical transient response to step load change at

2.5A/μS from 100% to 0% of Io, max at 5Vin, 0.6Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 20: Typical transient response to step load change at

2.5A/μS from 0% to 100% of Io, max at 5Vin, 0.6Vout (200uS/div

) (Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 21: Typical transient response to step load change at

2.5A/μS from 100% to 0% of Io, max at 5Vin, 1.2Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 22: Typical transient response to step load change at

2.5A/μS from 0% to 100% of Io, max at 5Vin, 1.2Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

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Electrical Characteristics Curves (con.)

Figure 23: Typical transient response to step load change at

2.5A/μS from 100% to 0% of Io, max at 5Vin, 1.8Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 24: Typical transient response to step load change at

2.5A/μS from 0% to 100% of Io, max at 5Vin, 1.8Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 25: Typical transient response to step load change at

2.5A/μS from 100% to 0% of Io, max at 5Vin, 3.3Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

Figure 26: Typical transient response to step load change at

2.5A/μS from 0% to 100% of Io, max at 5Vin, 3.3Vout (200uS/div)

(Cout = 47uF ceramic).top trace:Vout,0.1V/div;bottom

trace:Iout:2A/div.

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Figure 27: Output short circuit current 5Vin, 3.3Vout（10mS/div）

Figure 28:Tracking at 5Vin, 3.3V/3A out(1mS/div), tracking

Top trace:Vout,0.5V/div;Bottom trace:Iout,5A/div

voltage=4V,top trace:Vseq,1V/div;bottom trace:Vout,1V/div

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DESIGN CONSIDERATIONS

TEST CONFIGURATIONS

Input Source Impedance

To maintain low noise and ripple at the input voltage, it is

critical to use low ESR capacitors at the input to the

module. A highly inductive source can affect the stability

of the module. An input capacitance must be placed close

to the modules input pins to filter ripple current and ensure

module stability in the presence of inductive traces that

supply the input voltage to the module.

Figure 29: Input reflected-ripple test setup

Resistive

Load

1uF

10uF

tantalum ceramic

SCOPE

GND

Note: Use a 10μF tantalum and 1μF capacitor. Scope

measurement should be made using a BNC connector.

Figure 30: Peak-peak output noise and startup transient

measurement test setup.

GND

Figure 31: Output voltage and efficiency measurement test

setup

Note: All measurements are taken at the module terminals.

When the module is not soldered (via socket), place

Kelvin connections at module terminals to avoid

measurement errors due to contact resistance.

Vo  Io

Vi  Ii

  (

)100 %

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P10

DESIGN CONSIDERATIONS (CON.)

FEATURES DESCRIPTIONS

Safety Considerations

Remote On/Off

For safety-agency approval the power module must be

installed in compliance with the spacing and separation

requirements of the end-use safety agency standards.

The DCT series power modules have an On/Off pin for

remote On/Off operation. Both positive and negative

On/Off logic options are available in the DCT series power

modules.

For the converter output to be considered meeting the

requirements of safety extra-low voltage (SELV), the

input must meet SELV requirements. The power module

has extra-low voltage (ELV) outputs when all inputs are

ELV.

For negative logic module, connect an open collector

(NPN) transistor or open drain (N channel) MOSFET

between the On/Off pin and the GND pin (see figure 32).

Negative logic On/Off signal turns the module ON during

the logic high and turns the module OFF during the logic

low. When the negative On/Off function is not used, tie the

pin to GND (module will be On).

The input to these units is to be provided with a

maximum 6A fuse in the ungrounded lead.

For positive logic module, the On/Off pin is pulled high

with an external pull-up 5kΩ resistor (see figure 33).

Positive logic On/Off signal turns the module ON during

logic high and turns the module OFF during logic low. If

the Positive On/Off function is not used, tie the pin to Vin.

(module will be On)

Input Under voltage Lockout

At input voltages below the input under voltage lockout

limit, the module operation is disabled. The module will

begin to operate at an input voltage above the under

voltage lockout turn-on threshold.

Vin

I_ON/OFF

Over-Current Protection

On/Off

To provide protection in an output over load fault

condition, the unit is equipped with internal over-current

protection. When the over-current protection is triggered,

the unit enters hiccup mode. The units operate normally

once the fault condition is removed.

GND

Figure 32: Negaitive remote On/Off implementation

Vin

Rpull-

I_ON/OFF

On/Off

GND

Figure 33: Positive remote On/Off implementation

Over-Current Protection

To provide protection in an output over load fault

condition, the unit is equipped with internal over-current

protection. When the over-current protection is triggered,

the unit enters hiccup mode. The units operate normally

once the fault condition is removed.

DS_DCT04S0A0S03NFA_05292012

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P11

FEATURES DESCRIPTIONS (CON.)

Remote Sense

RLoad

TRIM

Rtrim

The DCT provide Vo remote sensing to achieve proper

regulation at the load points and reduce effects of

distribution losses on output line. In the event of an open

remote sense line, the module shall maintain local sense

regulation through an internal resistor. The module shall

correct for a total of 0.5V of loss. The remote sense line

impedance shall be < 10.

GND

Figure 35: Circuit configuration for programming output voltage

using an external resistor

Table 1 provides Rtrim values required for some common

output voltages, By using a 0.5% tolerance trim resistor, set

point tolerance of ±1.5% can be achieved as specified in

the electrical specification.

Distribution Losses

Vin

Sense

Table 1

Open

0.6V

GND

Distribution

1.2V

1.5V

1.8V

2.5V

3.3V

Figure 34: Effective circuit configuration for remote sense

1.333K

operation

0.632K

0.444K

Output Voltage Programming

The output voltage of the DCT can be programmed to any

voltage between 0.6Vdc and 3.3Vdc by connecting one

resistor (shown as Rtrim in Figure 35) between the TRIM

and GND pins of the module. Without this external

resistor, the output voltage of the module is 0.6 Vdc. To

calculate the value of the resistor Rtrim for a particular

output voltage Vo, please use the following equation:

Certain restrictions apply on the output voltage set point

depending on the input voltage. These are shown in the

Output Voltage vs. Input Voltage Set Point Area plot in

Figure 36. The Upper Limit curve shows that for output

voltages of 3.3V and lower, the input voltage must be lower

than the maximum of 5.5V. The Lower Limit curve shows

that for output voltages of 1.8V and higher, the input voltage

needs to be larger than the minimum of 2.4V.

1.2









Rtrim 

k





Vo  0.6

For example, to program the output voltage of the DCT

module to 1.8Vdc, Rtrim is calculated as follows:

1.2





Rtrim 

k  1K









1.8  0.6

Figure 36: Output Voltage vs. Input Voltage Set Point Area plot

showing limits where the output voltage can be set for different

input voltages.

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P12

FEATURE DESCRIPTIONS (CON.)

When an analog voltage is applied to the SEQ pin, the

output voltage tracks this voltage until the output reaches

the set-point voltage. The final value of the SEQ voltage

must be set higher than the set-point voltage of the

module. The output voltage follows the voltage on the

SEQ pin on a one-to-one basis. By connecting multiple

modules together, multiple modules can track their output

voltages to the voltage applied on the SEQ pin.

Voltage Margining

Output voltage margining can be implemented in the DCT

modules by connecting a resistor, R margin-up, from the Trim

pin to the ground pin for margining-up the output voltage

and by connecting a resistor, Rmargin-down, from the Trim pin

to the output pin for margining-down. Figure 3 shows the

circuit configuration for output voltage margining. If

unused, leave the trim pin unconnected. A calculation tool

is available from the evaluation procedure which

computes the values of Rmargin-up and Rmargin-down for a

specific output voltage and margin percentage.

For proper voltage sequencing, first, input voltage is

applied to the module. The On/Off pin of the module is

left unconnected (or tied to GND for negative logic

modules or tied to VIN for positive logic modules) so that

the module is ON by default. After applying input voltage

to the module, a minimum 10msec delay is required

before applying voltage on the SEQ pin. This delay gives

the module enough time to complete its internal power-up

soft-start cycle. During the delay time, the SEQ pin

should be held close to ground (nominally 50mV ± 20

mV). This is required to keep the internal op-amp out of

saturation thus preventing output overshoot during the

start of the sequencing ramp. By selecting resistor R1

(see Figure. 38) according to the following equation

Vin

Rmargin-down

Trim

GND

On/Off

Rmargin-up

Rtrim

Figure 37: Circuit configuration for output voltage margining

Output Voltage Sequencing

The DCT modules include a sequencing feature,

EZ-SEQUENCE that enables users to implement various

types of output voltage sequencing in their applications.

This is accomplished via an additional sequencing pin.

When not using the sequencing feature, either tie the SEQ

pin to VIN or leave it unconnected.

24950





R1 











Vin  0.05

The voltage at the sequencing pin will be 50mV when the

sequencing signal is at zero.

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P13

FEATURE DESCRIPTIONS (CON.)

Monotonic Start-up and Shutdown

The DCT 3A modules have monotonic start-up and

shutdown behavior for any combination of rated input

voltage, output current and operating temperature range.

After the 10msec delay, an analog voltage is applied to

the SEQ pin and the output voltage of the module will

track this voltage on a one-to-one volt bases until the

output reaches the set-point voltage. To initiate

simultaneous shutdown of the modules, the SEQ pin

voltage is lowered in a controlled manner. The output

voltage of the modules tracks the voltages below their

set-point voltages on a one-to-one basis. A valid input

voltage must be maintained until the tracking and output

voltages reach ground potential.

When using the EZ-SEQUENCETM feature to control

start-up of the module, pre-bias immunity during startup is

disabled. The pre-bias immunity feature of the module

relies on the module being in the diode-mode during

start-up. When using the EZ-SEQUENCETM feature,

modules goes through an internal set-up time of 10msec,

and will be in synchronous rectification mode when the

voltage at the SEQ pin is applied. This will result in the

module sinking current if a pre-bias voltage is present at

the output of the module.

Figure 38: Circuit showing connection of the sequencing signal to

the SEQ pin.

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P14

THERMAL CONSIDERATIONS

THERMAL CURVES

Thermal management is an important part of the system

design. To ensure proper, reliable operation, sufficient

cooling of the power module is needed over the entire

temperature range of the module. Convection cooling is

usually the dominant mode of heat transfer.

Hence, the choice of equipment to characterize the

thermal performance of the power module is a wind

tunnel.

Thermal Testing Setup

Delta’s DC/DC power modules are characterized in

heated vertical wind tunnels that simulate the thermal

environments encountered in most electronics

equipment. This type of equipment commonly uses

vertically mounted circuit cards in cabinet racks in which

the power modules are mounted.

Figure 40: Temperature measurement location

The allowed maximum hot spot temperature is defined at 109℃

DCT04S0A0S03OutputCurrentvs.AmbientTemperature and AirVelocity

OutputCurrent (A)

3.5

@Vin=5V Vout=2.5V~3.3V (EitherOrientation)

The following figure shows the wind tunnel

characterization setup. The power module is mounted

on a test PWB and is vertically positioned within the

wind tunnel.

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Natural

Convection

Thermal Derating

Heat can be removed by increasing airflow over the

module. To enhance system reliability, the power

module should always be operated below the maximum

operating temperature. If the temperature exceeds the

maximum module temperature, reliability of the unit may

be affected.

AmbientTemperature (℃)

Figure 41: Output current vs. ambient temperature and air

velocity@Vin=5V, Vout=2.5V~3.3V(Either Orientation)

DCT04S0A0S03OutputCurrentvs.AmbientTemperature and AirVelocity

PWB

FANCING PWB

MODULE

OutputCurrent (A)

3.5

@Vin=3.3V Vout=0.6V~1.8V(EitherOrientation)

3.0

2.5

2.0

1.5

1.0

0.5

0.0

Natural

Convection

AIR VELOCITY

AND AMBIENT

TEMPERATURE

SURED BELOW

THE MODULE

AIR FLOW

Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)

AmbientTemperature (℃)

Figure 39: Wind tunnel test setup

Figure 42: Output current vs. ambient temperature and air

velocity@Vin=3.3V, Vout=0.6V~1.8V(Either Orientation)

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P15

PICK AND PLACE LOCATION

RECOMMENDED PAD LAYOUT

SURFACE-MOUNT TAPE & REEL

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P16

LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE

Note: The temperature refers to the pin of DCT, measured on the pin Vout joint.

LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE

Temp.

Peak Temp. 240 ~ 245 ℃

220℃

200℃

Ramp down

max. 4℃/sec.

Preheat time

90~120 sec.

150℃

25℃

Time Limited 75 sec.

above 220℃

Ramp up

max. 3℃ /sec.

Time

Note: The temperature refers to the pin of DCT, measured on the pin Vout joint.

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P17

MECHANICAL DRAWING

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P18

PART NUMBERING SYSTEM

0A0

DCT

On/Off

logic

Product

Series

Input

Numbers

Output

Voltage

Package Output

Option Code

Voltage of Outputs

Type

Current

DCT - 3A

DCS- 6A

04 - S - Single

0A0 -

S - SMD

03-3A

N- negative F- RoHS 6/6

P- positive (Lead Free)

A - Standard Function

2.4~5.5V

12 –

Programmable

06 - 6A

12 - 12A

20 - 20A

DCM - 12A

DCL - 20A

4.5~14V

MODEL LIST

Efficiency

5.0Vin, 3.3Vdc @ 3A

Model Name

Packaging

Input Voltage

Output Voltage Output Current

DCT04S0A0S03NFA

SMD

2.4 ~ 5.5Vdc

0.6V~ 3.3Vdc

96.5%

CONTACT: www.deltaww.com/dcdc

USA:

Telephone:

East Coast: (888) 335 8201

West Coast: (888) 335 8208

Fax: (978) 656 3964

Email: DCDC@delta-corp.com

Europe:

Telephone:+31-20-655-0967

Fax: +31-20-655-0999

Asia & the rest of world:

Telephone: +886 3 4526107

Ext. 6220~6224

Fax: +886 3 4513485

Email: DCDC@delta.com.tw

Email: DCDC@delta-es.tw

WARRANTY

Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available

upon request from Delta.

Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by

Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use.

No license is granted by implication or otherwise under any patent or patent rights of Delta. Delta reserves the right

to revise these specifications at any time, without notice.

DS_DCT04S0A0S03NFA_05292012

E-mail: DCDC@delta.com.tw

http://www.deltaww.com/dcdc

P19

DCL04S0A0S12NFA [DELTA]

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