Delta Electronics Q48DC User Manual

FEATURES

 High efficiency: 88%@ ±12.1V/2.7A

 Size: 57.9mm x 36.8mm x 9.7mm

(2.28”×1.45”×0.38”)

 Industry standard pin out

 Fixed frequency operation

 Input UVLO, Output OCP, OVP, OTP

 2250V isolation

 No minimum load required

 Adjustable output voltage

 ISO 9001, TL 9000, ISO 14001, QS9000,

OHSAS18001 certified manufacturing

facility

 UL/cUL 60950-1 (US & Canada), and TUV

(EN60950-1) - pending

Delphi Series Q48DC, 65W Quarter Brick Dual Output DC/DC Power Modules: 48V in, ±12.1V, 2.7A Output

The Delphi Series Q48DC second generation Quarter Brick, 48V

input, positive and negative bipolar dual output, and isolated DC/DC

converters are the latest offering from a world leader in power system

and technology and manufacturing ― Delta Electronics, Inc. The

Q48DC product family is the second generation in the bipolar dual

output series and it provides even more cost effective solution of

positive and negative bipolar output (output voltage is 12.1V) and up

to 65 watts of power in an industry standard quarter brick package

size. Both output channels can be used independently. 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.

voltage, current, and temperature conditions. The Delphi Series

converters meet all safety requirements with basic insulation.

All models are fully protected from abnormal input/output

OPTIONS

 Positive On/Off logic

 Output OVP hiccup available

APPLICATIONS

 Telecom / DataCom

 Wireless Networks

 Optical Network Equipment  Server and Data Storage

 Industrial / Test Equipment

PRELIMINARY DATASHEET DS_ Q48DC12003_03112008

TECHNICAL SPECIFICATIONS

(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)

PARAMETER NOTES and CONDITIONS Q48DC12003NR A

ABSOLUTE MAXIMUM RATINGS

Input Voltage

Continuous 80 Vdc Transient 100ms 100 Vdc Operating Temperature Refer to Figure 20 for measuring point -40 124 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc

INPUT CHARACTERISTICS

Operating Input Voltage 36 48 75 Vdc Input Under-Voltage Lockout

Turn-On Voltage Threshold 32 33.5 35 Vdc

Turn-Off Voltage Threshold 29 30.5 32 Vdc

Lockout Hysteresis Voltage 2 3 4 Vdc

Maximum Input Current 100% Load, 36Vin 2.4 A No-Load Input Current 50 mA Off Converter Input Current 10 mA Inrush Current(I2t) 1 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 20 mA

Input Voltage Ripple Rejection 120Hz 66 dB

OUTPUT CHARACTERISTICS

Output Voltage Set Point Vin=48V, lo=lo. Max, Tc=25℃ Vout 1,2 Output Voltage Regulation

Over Load lo1=lo2=lo, min to lo, max Vout 1,2 ±20 ±180 mV

Over Line Vin=36V to 75V,Io1=Io2=full load Vout 1,2

Cross Regulation

Over Temperature Tc=-40℃ to 129℃, Io1=Io2= Io, min to Io, max ±120 mV Total Output Voltage Range Over all load, line and temperature ±11.74 ±12.46 V Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth

Peak-to-Peak Io1, Io2 Full Load, 1µF ceramic, 10µFtantalum Vout 1, 2 40 80 mV

RMS Io1, Io2 Full Load, 1µF ceramic, 10µF tantalum Vout 1, 2 10 30 mV

Operating Output Current Range Vout 1, 2 0 2.7 A Output DC Current-Limit Inception Iout 1＋ lout 2 7.1 9 A

DYNAMIC CHARACTERISTICS

Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs

Positive Step Change in Output Current

Negative Step Change in Output Current

Cross dynamic

Settling Time (within 1% Vout nominal) 100 us

Turn-On Transient Delay Time, From On/Off Control 2 ms Delay Time, From Input 2 ms

Start-up Time, From On/Off Control 20 30 ms Start-up Time, From Input 20 30 ms Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 5000 µF

EFFICIENCY

100% Load Iout1, Iout2 full load 88 % 60% Load Iout1, Iout2 60% of full load 86.5 %

ISOLATION CHAR ACTERISTICS

Input to Output <1 minute 2250 Vdc Isolation Resistance 10 MΩ Isolation Capacitance 1500 pF

FEATURE CHARACTERISTICS

Switching Frequency 330 kHz ON/OFF Control, (Logic Low-Module ON)

Logic Low Von/off at Ion/off=1.0mA -0.7 1.8 V

Logic High Von/off at Ion/off=0.0 µA 3.5 12 V

ON/OFF Current Ion/off at Von/off=0.0V 1 mA

Leakage Current Logic High, Von/off=15V 300 uA Output Voltage Trim Range

Output Over-Voltage Protection Over full temp range; %of nominal Vout 124 130 150 %

GENERAL SPECIFICATIONS

MTBF Io=80% of Io, max; Ta=40°C TBD M hours Weight 31 grams Over-Temperature Shutdown Refer to Figure 20 for measuring point 129 °C

Min. Typ. Max. Units

±12.10 ±12.22 V

±360 mV

±20 ±120

400 600

±120 ±360

| Io1-Io2| <20% Io,max

Iout1 or Iout2 from50% Io, max

to 75% Io, max

Iout2 or Iout1 from 75% Io,max

to 50% Io, max

Pout ≦ max rated power (65W)

Iout ≦ max 120% rated Iout

±11.98

Vout 1 400 600

Vout 2

Vout 1 400 600

Vout 2

-17 +5 %

-25 -17 %

DS_Q48DC12003_03112008

ELECTRICAL CHARACTERISTICS CURVES

EFFICIENCY (%) 1

0.3 0.7 1.1 1.5 1.9 2.3 2.7

48Vin

36Vin

OUTPUT CURRENT( A )

75Vin

Figure 1: Efficiency vs. load current for minimum, nominal, and

maximum input voltage at 25

2.5

2.3

2.1

1.9

1.7

1.5

1.3

1.1

INPUT CURRENT (A) 1

0.9

0.7

0.5 25 30 35 40 45 50 55 60 65 70 75

°C. Io1=Io2.

INPUT V OL TA GE ( V)

10.2

9.4

8.6

7.8

7.0

6.2

5.4

4.6

POWER DISSIPATION( W) 1

3.8

3.0

0.3 0.7 1.1 1.5 1.9 2.3 2.7

75Vin

OUTPUT CURRENT( A )

48Vin

36Vin

Figure 2: Power dissipation vs. load current for minimum,

nominal, and maximum input voltage at 25

°C. Io1=Io2.

Figure 3: Typical input characteristics at room temperature (Io=full load).

DS_Q48DC12003_03112008

ELECTRICAL CHARACTERISTICS CURVES

Figure 4: Turn-on transient at zero load current (10ms/div). Vin=48V. Top Trace: Vout: 5V/div; Bottom Trace: ON/OFF input:

5V/div.

Figure 5: Turn-on transient at full rated load current (resistive load) (10 ms/div). Vin=48V. Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF input: 5V/div.

Figure 6: Turn-on transient at zero load current (10ms/div). Vin=48V. Top Trace: Vout: 5V/div; Bottom Trace: Vin input: 50V/div.

DS_Q48DC12003_03112008

Figure 7: Turn-on transient at full rated load current (resistive load) (10 ms/div). Vin=48V. Top Trace: Vout; 5V/div; Bottom

Trace: Vin input: 50V/div.

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