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50W DC-DC Converter 12V

50W DC-DC Converter 12V

50W DC-DC Converter 12V

পণ্যের বিবরণ:

Place of Origin: China
পরিচিতিমুলক নাম: Enargy
Model Number: XD50-48S12-POC

প্রদান:

Minimum Order Quantity: 1pcs
মূল্য: Negotiation
Delivery Time: 1-8 Weeks
Payment Terms: Negotiation
Supply Ability: 1000Pcs/week
এখন যোগাযোগ
বিস্তারিত পণ্যের বর্ণনা

DC-DC Converters 50W Output 12V XD50-48S12-POC

 

 

Features

Output power: 50W

Wide input range: 36-72VDC

High conversion efficiency:88%

Line regulation to ±1%

Load regulation to ±1%

Fixed operating frequency

Isolation Voltage :1500V

Enable (On/Off) Control

Output over-voltage protection

Output over-load protection

Hiccup mode short circuit protection

Over-temperature protection

Input under-voltage lock-out

 

Product Overview

These DC-DC converter modules use advanced power

processing, control and packaging technologies to provide

the performance, flexibility, reliability and cost effectiveness

of a mature power component. High frequency Active Clamp

switching provides high power density with low noise and

high efficiency.

 

1. Electric Characteristics

Electrical characteristics apply over the full operating range of input voltage, output load (resistive) and base plate

temperature, unless otherwise specified. All temperatures refer to the operating temperature at the center of the base plate.

1.1 Absolute maximum ratings

Parameter

Min

Typ

Max

Units

Notes

Input Voltage

 

 

78

Vdc

Continuous, non-operating

 

 

75

Vdc

Continuous, operating

 

 

78

Vdc

Operating transient protection

Isolation voltage

 

 

2000

Vdc

IIn to out

Operating Temperature

-55

 

100

 

Storage Temperature

-55

 

125

 

Enable to -Vin Voltage

-2

 

15

Vdc

 

 

1.2 Input Characteristics

Parameter

Min

Typ

Max

Units

Notes

Operating input voltage

36

48

72

Vdc

Continuous

Input Surge Withstand

 

 

78

Vdc

<100mS

Under-Voltage Lockout

 

35.5

36.0

Vdc

Turn - On Threshold

32.5

33.5

 

Vdc

Turn - Off Threshold

Maximum Input Current

 

1.6

 

A

Full Load;36Vdc Input

Efficiency

 

91

 

%

Figures 1-2

Dissipation, Standby

 

2.0

3.5

W

No Load

Disabled Input Current

 

 

5

mA

Enable pin low

Recommend External Input

Capacitance

 

100

 

uF

Typical ESR 0.1-0.2W

 

1.3 Output Characteristics

Parameter

Min

Typ

Max

Units

Notes

Output Voltage Set point

11.88

12.00

12.12

V

Nominal input; No load;25℃

Output Current Range

0.1

 

10

A

Subject to thermal derating;

Line Regulation

 

±0.2

±1

%

Low line to high line; full load

Load Regulation

 

±0.2

±1

%

No load to full load; nominal input

Temperature Regulation

 

±0.02

 

% / °C

Over operating temperature range

Current limit

 

13

 

A

Output voltage 90% of nominal

Short circuit current

0

10

25

A

Output voltage <250 mV

RMS

 

 

50

mVp-p

Nominal input; full load; 20 MHz

bandwidth; See Figures 7

Peak-to-Peak

 

 

75

mVp-p

Maximum Output Cap.

220

 

3300

μF

Nominal input; full load

Output Voltage Trim

-8

 

+10

%

Nominal input; full load; 25°C

 

1.4 Dynamic Response Characteristics

Parameter

Min

Typ

Max

Units

Notes

Change in Output Current

(di/dt= 0.1A/us)

 

 

380

mV

50% to 75% to 50% Iout max at nominal

ambient air temperature; Figure 5

Change in Output Current

(di/dt= 1.5A/us)

 

 

400

mV

50% to 75% to 50% Iout max at nominal

ambient air temperature; Figure 6

Settling Time

 

 

300

uS

To within 1% Vout nom.

Turn-on Time

 

5

 

mS

Full load; Vout=90% nom.

Shut-down fall time

 

2

 

mS

Full load; Vout=10% nom.

Output voltage overshoot

 

 

5

%

 

 

1.5 Functional Characteristics

Parameter

Min

Typ

Max

Units

Notes

Switching Frequency

180

200

230

KHz

Regulation stage and Isolation stage

Trim(Pin6)

See part 6.2 Voltage Trim(Pin6)

Output Voltage Trim

 

 

10

%

Trim Up, Trim Pin to (-) Vout.

8

 

 

%

Trim Down, Trim Pin to (+) Vout.

Enable(ON/OFF)Control(Pin1)

See part 6.1

Enable Voltage

Enable Source Current

 

 

15

Vdc

Enable pin floating

 

 

1

mA

 

Enable (On - Off Control)

Positive Logic

1.0

 

15

%

On–Control, Logic high or floating

-0.5

 

0.3

%

Off–Control, Logic low

 

1.6 Isolation Characteristics

Parameter

Min

Typ

Max

Units

Notes

Over-Voltage Protection

 

120

 

%

Type: Voltage-Limit Mode

Minimum load at rated input voltage

Over-Load Protection

 

120

 

%

Current–Mode, Pulse by Pulse Current

Limit Threshold,(%Rated Load)

Short – Circuit Protection

 

 

65

Type: Hiccup Mode, Non–Latching,

Auto–Recovery,Threshold,Short–Circuit

Resistance

Over–Temperature

Protection

 

125

 

Type: Non–Latching, Auto-Recovery;

Threshold, PCB Temperature

 

25

 

Hysteresis

 

1.7 Safety Standard

Parameter

Min

Typ

Max

Units

Notes

Isolation Voltage

1500

 

 

Vdc

In to Out

Isolation Resistance

10

 

 

At 500VDC to test it when atmospheric

pressure and R.H. is 90%

Isolation Capacitance

 

1000

 

pF

 

 

 

2. General Characteristics

Parameter

Min

Typ

Max

Units

Notes

Operating Temperature

-55

 

+100

Extended, base PCB temperature

Storage Temperature

-55

 

+125

Ambient

Temperature Coefficient

 

 

±0.02

%/℃

 

Humidity

10

 

95

%R.H.

Relative Humidity, Non - Condensing

Weight

 

0.88(25)

 

Oz (g)

Open Frame

MTBF ( calculated )

1

 

 

MHrs

TR-NWT-000332; 80% load,300LFM,

40℃ Ta

 

3.Standards Compliance

Parameter

Notes

UL/cUl60950

 

EN60950

 

72/23/EEC

 

93/68/EEC

 

Needle Flame Test (IEC 695-2-2)

test on entire assembly; board & plastic components UL94V-0 compliant

IEC 61000-4-2

ESD test, 8kV - NP, 15kV air - NP (Normal Performance)

GR-1089-CORE

Section 7 - electrical safety, Section 9 - bonding/grounding

Telcordia (Bell core) GR-513

 

An external input fuse must always be used to meet these safety requirements. Contact Ours for official safety

certificates on new releases or download from the ENARGY CORP. website.

 

4. QUALIFICATION TESTING

Parameter.

# Units

Conditions

Life Test

32

95% rated Vin and load, units at derating point, 1000 hours

Vibration

5

10-55Hz sweep, 0.060” total excursion,1 min./sweep, 120 sweeps for 3

axis

Mechanical Shock

5

100g minimum, 2 drops in x and y axis, 1 drop in z axis

Temperature Cycling

10

-40°C to 100°C, unit temp. ramp 15°C/min., 500 cycles

Power/Thermal Cycling

5

Tolerating = min to max, Vin = min to max, full load, 100 cycles

Design Marginality

5

Tmin-10°C to Tmax+10°C, 5°C steps, Vin = min to max, 0-105% load

Humidity

5

85°C, 85% RH, 1000 hours, 2 minutes on and 6 hours off

Solderability

15 pins

MIL-STD-883, method 2003

· Extensive characterization testing of all ENARGY CORP. Products and manufacturing processes is performed to

ensure that we supply robust, reliable product. Contact factory for official product family qualification document.

· OPTIONS

ENARGY CORP. provides various options for Logic Sense, Pin Length and Feature Set for this family of DC/DC

converters. Please consult the page 10 of this specification sheet for information on available options.

 

5. WORK CURVE&WAVE

50W DC-DC Converter 12V50W DC-DC Converter 12V

Figure 1: Efficiency at nominal output voltage vs. load
current for minimum, nominal, and maximum input voltage
at 25°C.

Figure 2: Efficiency at nominal output voltage and 60%
rated power vs. airflow rate for ambient air temperatures of
25°C, 40°C, and 55°C (nominal Vin).

 

50W DC-DC Converter 12V50W DC-DC Converter 12V

Figure 3: Turn-on transient at full load (resistive load) (2
ms/div).Input voltage pre-applied.
Ch 1: Vout (5V/div).
Ch 2: ON/OFF input(500mV/div)

Figure 4: Shut-down fall time at full load (2 ms/div).
Ch 1: Vout (5V/div)
Ch 2: ON/OFF input (500mV/div)

 

50W DC-DC Converter 12V50W DC-DC Converter 12V

Figure 5: Output voltage response to step-change in load
current (50%-75%-50% of Iout(max); dI/dt = 0.1A/μs). Load
cap: 220μF, 45m Ω ESR tantalum capacitor and 1μF
ceramic capacitor. Ch 1: Vout (100mV/div, 400uS /div)

Figure6: Output voltage response to step-change in load
current (50%-75%-50% of Iout(max): dI/dt = 2.5A/μs). Load
cap: 220μF, 45m Ω ESR tantalum capacitor and 1μF
ceramic cap. Ch 1: Vout (100mV/div, 400uS /div)

 

50W DC-DC Converter 12V

Figure 7: Output voltage ripple at nominal input voltage and
rated load current (20mV/div). Load capacitance: 1μF
ceramic capacitor and 10μF tantalum capacitor. Bandwidth:
20 MHz.

 

6. Pin Function Description
6.1 Enable (ON/OFF) Control (Pin 1)

The Enable pin allows the power module to be switched on and off electronically. The Enable (On/Off) function is
useful for conserving battery power, for pulsed power application or for power up sequencing.
The Enable pin is referenced to the -Vin. It is pulled up internally, so no external voltage source is required. An open
collector (or open drain) switch is recommended for the control of the Enable pin.
When using the Enable pin, make sure that the reference is really the -Vin pin, not ahead of EMI filtering or
remotely from the unit. Optically coupling the control signal and locating the opto coupler directly at the module will
avoid any of these problems. If the Enable pin is not used, it can be left floating (positive logic) or connected to the -Vin
pin (negative logic).Figure A details five possible circuits for driving the ON/OFF pin. Figure B is a detailed look of
the internal ON/OFF circuitry.

50W DC-DC Converter 12V50W DC-DC Converter 12V

Figure A: Various circuits for driving the ON/OFF pin.

Figure B: Internal ON/OFF pin circuitry.

 

6.2 Voltage Trim (Pin 6)
Output voltage can be adjusted up or down with an external resistor. There are positive trim logic and negative
trim logic available. For positive logic, the output voltage will increase when an external trimming resistor is connected
between the Trim and Vout(+) pin. The output voltage will decrease when an external trimming resistor is connected
between Trim and Com pin. A multi-turn 20Ký trim pot can also be used to adjust the output voltage up or down.(Figure
C & D).

Output Trim

Trim-Up

Trim Pin to Com

Trim-Down

Trim Pin to Vout(+)

 

50W DC-DC Converter 12V50W DC-DC Converter 12V

Figure C: Output-voltage Trim external circuit

Figure D:Trim Pot Connection.

 

7. Basic Operation and Features Application
7.1 Output Ripple & Noise Test

The output ripple is composed of fundamental frequency ripple and high frequency switching noise spikes. The
fundamental switching frequency ripple (or basic ripple) is in the 100KHz to 1MHz range; the high frequency switching
noise spike (or switching noise) is in the 10 MHz to 50MHz range. The switching noise is normally specified with 20
MHz bandwidth to include all significant harmonics for the noise spikes.
The easiest way to measure the output ripple and noise is to use an oscilloscope probe tip and ground ring pressed
directly against the power converter output pins, as shown below. This makes the shortest possible connection across
the output terminals.The oscilloscope probe ground clip should never be used in the ripple and noise measurement. The
ground clip will not only act as an antenna and pickup the radiated high frequency energy, but it will introduce the
common-mode noise to the measurement as well.
The standard test setup for ripple & noise measurements is shown in Figure E. A probe socket (Tektronix, P.N.
131.0258-00) is used for the measurements to eliminate noise pickup associated with long ground clip of scope probes.

 

50W DC-DC Converter 12V

Figure E: Ripple & Noise Standard Testing Means.

 

7.2 Typical Application Circuit

50W DC-DC Converter 12V

Figure F: Typical application circuit (negative logic unit, permanently enabled).

Application Circuits: Figure F below provides a typical circuit diagram which details the input filtering and
voltage trimming.

 

7.3 Input Filtering 

DC-DC converters, by nature, generate significant levels of both conducted and radiated noise. There are two types of conducted noise: common mode and differential mode noise. The common mode noise is directly related to the effective parasitic capacitance between the power module input conductors and chassis ground. The differential mode noise is across the input conductors. It is recommended to have some level of EMI suppression to the power module.
Conducted noise on the input power lines can occur as either differential or common-mode noise currents. The
required standard for conducted emissions is EN55022 Class A (FCC Part15). (See Figure G)

50W DC-DC Converter 12V

Figure G: Input Filtering

 

7.4 Input Reflected Ripple Current

The converter is drawing current from input power
source only when the input switch is on. This creates a
pulsation current flow from the input source. The reflected
ripple current is measured as a peak-to-peak current with a
current probe over 0 to 20MHz bandwidth. Ripple current
can be suppressed by an external Π (pi) filter as shown
below. see Figure H.

50W DC-DC Converter 12V

Figure H: Input Reflected Ripple Current.

 

7.5 Protection Features
· Input Under-Voltage Lockout: The converter is designed to turn off when the input voltage is too low, helping avoid an input system instability problem, The lockout circuitry is a comparator with DC hysteresis. When the input voltage is rising, it must exceed the typical Turn-On Voltage Threshold value(listed on the specification page) before the converter will turn on. Once the converter is on, the input voltage must fall below the typical Turn-Off Voltage Threshold value
before the converter will turn off.
· Output Current Limit: The maximum current limit remains constant as the output voltage drops. However, once the impedance of the short across the output is small enough to make the output voltage drop below the specified Output DC Current-Limit Shutdown Voltage, the converter into hiccup mode indefinite short circuit protection state until the short circuit condition is removed. This prevents excessive heating of the converter or the load board.
· Over-Temperature Shutdown: A temperature sensor on the converter senses the average temperature of the module.The thermal shutdown circuit is designed to turn the converter off when the temperature at the sensed location reaches the Over-Temperature Shutdown value. It will allow the converter to turn on again when the temperature of the sensed location falls by the amount of the Over-Temperature Shutdown Restart Hysteresis value.

 

8. MECHANICAL DIAGRAM

50W DC-DC Converter 12V

 

NOTES:
1. All pins are 0.040” (1.02mm)
dia. with 0.09” (2.2mm) dia.
standoff shoulders.

 

8.1 Pin Designations

Pin No.

Name

Function

1

Enable

TTL input to turn converter on and off, referenced to Vin(-), with internal pull up.

2

Vin(-)

Negative input voltage

3

Vin(+)

Positive input voltage

4

Vout(+)

Positive output voltage

5

Com

Ground

6

Vout(-)

Negative output voltage

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