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
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 M 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
400 600
±120 ±360
mV
mV
mV
mV
| 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
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ELECTRICAL CHARACTERISTICS CURVES
90
87
84
81
78
75
72
69
EFFICIENCY (%) 1
66
63
60
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
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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.
4
ELECTRICAL CHARACTERISTICS CURVES
ELECTRICAL CHARACTERISTICS CURVES
90
87
84
81
78
75
72
69
EFFICIENCY (%) 1
66
63
60
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
Figure 8: Output voltage response to step-change in load
maximum input voltage at 25
current Iout1 (75%-50%-75% of Io, max; di/dt = 0.1A/µs, 200uS/DIV)). Vin=48V. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div),
2.5
Bottom trace: Iout (1A/div). Scope measurement should be
2.3
made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from
2.1
the module.
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)
Figure 2: Power dissipation vs. load current for minimum,
Figure 9: Output voltage response to step-change in load
nominal, and maximum input voltage at 25
current Iout2 (75%-50%-75% of Io, max; di/dt = 0.1A/µs, 200uS/DIV). Vin=48V. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top trace: Vout (100mV/div), Bottom trace: Iout (1A/div). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module.
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
°C. Io1=Io2.
36Vin
Figure 3: Typical input characteristics at room temperature (Io=full load).
DS_Q48DC12003_03112008
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ELECTRICAL CHARACTERISTICS CURVES
Figure 10: Test set-up diagram showing measurement points for Input Terminal Ripple Current and Input Reflected Ripple
Current. Note: Measured input reflected-ripple current with a simulated source Inductance (L possible battery impedance. Measure current as shown above.
Figure 12: Input reflected ripple current, i source inductor at nominal input voltage and rated load current
(20 mA/div).
) of 12 μH. Capacitor Cs offset
TEST
, through a 12µH
s
Figure 1 1: Input Terminal Ripple Current, i current and nominal input voltage with 12
and 33
µF electrolytic capacitor (500 mA/div).
, at full rated output
c
µH source impedance
DS_Q48DC12003_03112008
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ELECTRICAL CHARACTERISTICS CURVES
V
Copper Strip
Vo(+)
10u 1u
SCOPE RESISTI
LOAD
Vo(-)
Figure 13: Output voltage noise and ripple measurement
test setup.
13
12
11
10
9
8 7
6 5
4 3
OUTPUT VOLTAG E(V) 1
2 1
0
0123456789
LOAD CURRENT( A )
Figure 14: Output voltage ripple at nominal input voltage (Vin=48V) and rated load current (Io1=Io2=2.7A,20 mV/div). Load
capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. (See Figure 13). Scope measurement should be made using a BNC cable (length short than 20 inch). Position the load between 51 mm and 76 mm (2inch and 3 inch) from the module.
Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points.
DS_Q48DC12003_03112008
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DESIGN CONSIDERATIONS
Input Source Impedance
The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few μH, we advise adding a 10 to 100 μF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to
the input of the module to improve the stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate in a wide variety of systems and applications. For design assistance with EMC compliance and related PWB layout issues, please contact Delta’s technical support team. An external input filter module is available for easier EMC compliance design. Application notes to assist designers in addressing these issues are pending release.
Safety Considerations
The power module must be installed in compliance with the spacing and separation requirements of the end-user’s safety agency standard, i.e., UL60950, CAN/CSA-C22.2 No. 60950-00 and EN60950:2000 and IEC60950-1999, if the system in which the power module is to be used must meet safety agency requirements.
When the input source is 60 Vdc or below, the power module meets SELV (safety extra-low voltage) requirements. If the input source is a hazardous voltage which is greater than 60 Vdc and less than or equal to 75 Vdc, for the module’s output to meet SELV requirements, all of the following must be met:
The input source must be insulate from any
hazardous voltage, including the ac mains, with reinforced insulation.
One Vi pin and one Vo pin are grounder, or all the
input and output pins are kept floating.
The input terminals of the module are not operator
accessible.
If the metal baseplate is grounded the output must
be also grounded.
A SELV reliability test is conducted on the system
where the module is used to ensure that under a single fault, hazardous voltage does not appear at the module’s output.
DS_Q48DC12003_03112008
Do not ground one of the input pins without grounding one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin and ground.
The power module has extra-low voltage (ELV) outputs when all inputs are ELV.
This power module is not internally fused. To achieve optimum safety and system protection, an input line fuse is highly recommended. The safety agencies require a normal-blow fuse with 7A maximum rating to be installed in the ungrounded lead. A lower rated fuse can be used based on the maximum inrush transient energy and maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly process before the board or system undergoes electrical testing. Inadequate cleaning and/or drying may lower the reliability of a power module and severely affect the finished circuit board assembly test. Adequate cleaning and/or drying is especially important for un-encapsulated and/or open frame type power modules. For assistance on appropriate soldering and cleaning procedures, please contact Delta’s technical support team.
8
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode).
The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected.
Over-Voltage Protection
The modules include an internal output over-voltage protection circuit, which monitors the voltage on the output terminals. If this voltage exceeds the over-voltage set point, the module will shut down and latch off. The over-voltage latch is reset by either cycling the input power or by toggling the on/off signal for one second.
Over-Temperature Protection
The over-temperature protection consists of circuitry that provides protection from thermal damage. If the temperature exceeds the over-temperature threshold the module will shut down.
The module will try to restart after shutdown. If the over-temperature condition still exists during restart, the module will shut down again. This restart trial will continue until the temperature is within specification.
Remote On/Off
The remote on/off feature on the module can be either negative or positive logic. Negative logic turns the module on during a logic low and off during a logic high. Positive logic turns the modules on during a logic high and off during a logic low.
Remote on/off can be controlled by an external switch between the on/off terminal and the Vi(-) terminal. The switch can be an open collector or open drain.
For negative logic if the remote on/off feature is not used, please short the on/off pin to Vi(-). For positive logic if the remote on/off feature is not used, please leave the on/off pin to floating.
Vi(+)
ON/OFF
Vi(-)
Figure 16: Remote on/off implementation
Vo(+)
Trim
Rtn
Vo(-)
DS_Q48DC12003_03112008
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FEATURES DESCRIPTIONS (CON.)
Δ
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point, the modules may be connected with an external resistor between the TRIM pin and either the Vo(+) or Vo(-). The TRIM pin should be left open if this feature is not used.
Vo(+)
R
trim-down
Trim
Rtn
Vo(-)
Figure 17: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM and Vo(+) pins, the output voltage set point decreases (Fig.17). The external resistor value required to obtain a percentage of output voltage change % is defined
as:
If the external resistor is connected between the TRIM and Rtn the output voltage set point increases (Fig.18). The external resistor value required to obtain a percentage output voltage change % is defined as:
197
= KupRtrim
Ex. When Trim-up +5%(12 .1V×1.05=12.71V)
197
5
When using trim, the output voltage of the module is usually increased, which increases the power output of the module with the same output current.
Care should be taken to ensure that the maximum output power of the module remains at or below the maximum rated power.
()
Ω
()
Ω== KupRtrim 4.39
749
= KdownRtrim 46.9
Δ
Ex. When Trim-down -25%(12.1V×0.75=9.08V)
749
⎡ ⎢
25
= KKdownRtrim 5.2046.9
()
Ω
⎥ ⎦
() ()
⎥ ⎦
Ω=Ω
Vo(+)
Trim
R
trim-up
Rtn
Vo(-)
Figure 18: Circuit configuration for trim-up (increase output
voltage)
DS_Q48DC12003_03112008
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THERMAL CONSIDERATIONS
A
Y
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.
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. The space between the neighboring PWB and the top of the power module is constantly kept at 6.35mm (0.25’’).
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.
FACING PWB
PWB
MODULE
THERMAL CURVES
Figure 20: Temperature measurement location
* The allowed maximum hot spot temperature is defined at 124
Output Current(A)
3.0
2.5
2.0
1.5
1.0
0.5
0.0 25 30 35 40 45 50 55 60 65 70 75 80 85
Q48DC12003(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Natural
Convection
100LFM
200LFM
Ambient Temperature (℃)
Figure 21: Output current vs. ambient temperature and air velocity
= 48V(Transverse Orientation)
@V
in
AIR VELOCIT AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 19: Wind Tunnel Test Setup
DS_Q48DC12003_03112008
50.8 (2.0”)
IR FLOW
12.7 (0.5”)
11
MECHANICAL DRAWING
Pin No. Name Function
1 2 3 4 5 6 7
DS_Q48DC12003_03112008
+Vin ON/OFF
-Vin
-Vout GND Trim +Vout
Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Ground Output voltage trim Positive output voltage
12
PART NUMBERING SYSTEM
Q 48 D C 120 03 N R
Product
Type
Q - Quarter
Brick
Input
Voltage
48V D - Dual
Number of
Outputs
Output
Product
Series
C - 2nd
generation of
bipolar dual
output
Output
Voltage
120 - 12.1V 03 - 2.7A N - Negative
Output
Current
ON/OFF
Logic
P - Positive
Length
R - 0.150”
Pin
F A
Option Code
F- RoHS 6/6
(Lead Free)
A - Standard
Functions
MODEL LIST
MODEL NAME INPUT OUTPUT EFF @ 100% LOAD
Q48DC12003NR A 36V~75V 2.4A
CONTACT
USA:
Telephone: East Coast: (888) 335 8201 West Coast: (888) 335 8208 Fax: (978) 656 3964 Email: DCDC@delta-corp.com
: www.delta.com.tw/dcdc
Europe:
Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.com
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
.
±12.1V
2.7A 88%
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220 Fax: +886 3 4513485 Email: DCDC@delta.com.tw
DS_Q48DC12003_03112008
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