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QBC Series
48VIN, 12V/22A Output High Efficiency, 1/4-Brick Bus Converters
Typical unit
FEATURES
264 Watts total output power 96% Ultra-high effi ciency @ full load 48V Input (40.5 to 57V range) 12V/22A Output for Intermediate Bus Architectures with POL converters Input Over/Under Voltage Shutdown Synchronous-rectifier topology 150kHz fi xed switching frequency Output current sharing Fully isolated, 2250V (BASIC) Low 80mVp-p ripple/noise Standard quarter-brick package Stable no-load condition Thermal shutdown Fully I/O protected IEC/EN/UL/cUL60950-1 certified
The QBC-12/22-L48 DC/DC converter is one of DATEL's new generation, fully isolated, Intermediate Bus Converters, designed and optimized for total on-board solutions in combination with our nonisolated point of load converters of the HEN, LEN, LQN, LSM and LSN series. . PRODUCT OVERVIEW
The QBC's convert the standard 48V (40.5 to 57V limited range) to a nonregulated 12V (9.6 to 13.5V range) bus voltage with a total output power of 264 Watts. Taking full advantage of a synchronous-rectifi er topology, the QBC-series achieve ultra-high effi ciency of 96%, minimizing power losses and enabling full-power operation to ambient temperatures up to +70C with minimal air flow. These highdensity, open-frame DC/DC converters are standard quarter-brick packages with industry-standard footprint and are only 0.42 inches (10.67mm) high, or 0.54 inches (13.72mm) with optional heat sink. Assembled using fully automated, SMT-on-pcb techniques, QBC's provide fixed frequency conversion, output On/Off control with choice of positive (standard) or negative (optional) logic, stable noload operation, current sharing capability, and low output ripple/noise (80mVp-p). The fully functional QBC bus converters feature full I/O fault protection including input overvoltage and undervoltage shutdown, output overvoltage, output current limiting, with choice of "hiccup" (standard) or "latching" (optional), short-circuit protection, and thermal shutdown. All models are IEC/EN/UL60950-1 certified and EMC compliant. Safety, CB, HALT and EMC reports are available upon request. Refer to the DATEL application note, Bus Converters Aim to Boost Efficiency In IBA-Based Power Designs.
ORDERING GUIDE SUMMARY
Output Model
QBC-12/22-L48-C
Input Regulation Line Load Max. Max.
10% 5%
VOUT V
12
IOUT A
22
R/N (mV p-p) Typ.
80
VIN Temp. Max.
2%
Max.
120
Nom. V
48
Range V
40.5-57
Iin mA/A
125/5.7
Efficiency Min.
94.5%
Package/Pinout
C49, C50/P65
Typ.
96%
Typical at TA = +25C under nominal line voltage and nominal-load conditions, unless noted. Ripple/Noise (R/N) is tested/specified over a 20MHz bandwidth. All models are specified with an external 0.1F multi-layer ceramic capacitor installed across their output pins. Devices have no minimum-load requirements and will regulate under no-load conditions. Regulation specifications describe the output-voltage deviation as the line voltage or load is varied from its midpoint value to either extreme. Nominal line voltage, no-load/full-load conditions. IOUT max. at low line is 24 Amps; 20 Amps at high line. (See Performance Curves.)
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Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDC_QBC.A02 Page 1 of 6
QBC Series
48VIN, 12V/22A Output High Efficiency, 1/4-Brick Bus Converters
MECHANICAL SPECIFICATIONS
2.22 (56.4) B 1.860 (47.2) B A
2.30 (58.4) B B
A
A A
1.860 (47.2)
ALUMINUM BASE PLATE
ALUMINUM BASE PLATE
1.45 (36.8)
1.030 (26.2)
#M3 X 0.5-6H THD X 0.175 DP
1.45 (36.8)
1.030 (26.2)
#M3 X 0.5-6H THD X 0.175 DP
0.42 (10.7)
0.54 (13.7)
0.50 (12.7)
2.22 (56.4)
A
0.225 (5.7)
PLASTIC STANDOFFS ARE RELIEVED 0.030 (0.76) IN SOLDER JOINT AREA
0.25 (6.4) 0.13 (3.3) TYP.
0.150 (3.8)
PINS 1-3: 0.040 0.001 (1.016 0.025) PINS 4-5: 0.062 0.001 (1.575 0.025)
COPPER SMT LEADS COPLANAR TO 0.004
B
B
B
B
2.00 (50.8)
A
1
0.600 (15.2)
4
0.600 (15.2)
0.600 (15.2)
0.600 (15.2)
2 3 5
1.45 (36.8)
0.300 (7.6) BOTTOM VIEW
0.300 (7.6)
QBC Surface-Mount Version
BOTTOM VIEW
DIMENSIONS ARE IN INCHES (MM)
Dimensions are in inches (mm shown for ref. only).
QBC Through-Hole Version
INPUT/OUTPUT CONNECTIONS Pin Function P65 1 2 3 4 5 -Input Remote On/Off +Input -Output +Output
Third Angle Projection
Tolerances (unless otherwise specified): .XX 0.02 (0.5) .XXX 0.010 (0.25) Angles 2 Components are shown for reference only.
PART NUMBER STRUCTURE
Q BC - 12 / 22 - L48 N L B M - C
Quarter-Brick Package Bus Converter Nominal Output Voltage: 12 Volts Leave the option letters blank for standard default configuration. Maximum Rated Output: Current in Amps Input Voltage Range: L48 = 40.5 to 57 Volts (48V nominal) RoHS-6 hazardous substance compliant Optional Surface-Mount Package Optional Baseplate Latching over-current protection (optional) (hiccup standard) Note: Optional: Some model number combinations may not be On/Off Control available. Contact Murata Power Solutions for with negative polarity ordering assistance. (standard is positive polarity)
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
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MDC_QBC.A02 Page 2 of 6
B
QBC Series
48VIN, 12V/22A Output High Efficiency, 1/4-Brick Bus Converters
Performance/Functional Specifications
Typical @ TA = +25C under nominal line voltage and full-load conditions unless noted.
Input
Input Voltage Range Overvoltage Shutdown Start-Up Threshold Undervoltage Shutdown Input Current Input Reflected Ripple Current Internal Filter Type Reverse Polarity Protection On/Off Control Positive Logic Negative Logic ("N" Suffix) 40.5-57 Volts (48V nominal) 57.5-59.5 Volts (58V typical) 37-40 Volts (39.5V typical) 36-39.5 Volts (38.5V typical) See Performance Spec 10mVp-p Pi None (see Absolute Max. Ratings) On= open (internal pull-up) Off= 0 to 0.8V (0.8mA max.) On = pulled low to 0-0.8V (0.8mA max.) Off = open (internal pull-up)
All models are tested and specified with no external output and no external input capacitors, and 300 lfm air flow, unless otherwise noted. All models will effectively regulate under no-load conditions (with perhaps a slight increase in output ripple/noise). See Technical Notes/Performance Curves for additional explanations and details. Input Ripple Current is tested/specified over a 5-20MHz bandwidth with an external 33F input capacitor and a simulated source impedance of 220F and 12H. See I/O Filtering, Input Ripple Current and Output Noise for details. The On/Off Control is designed to be driven with open collector or by appropriate voltage levels The Current-Limit-Inception point is the output current level at which the converter's powerlimiting circuitry drops the output voltage 3% from its initial value. See Output Current Limiting and Short-Circuit Protection for more details. For Start-Up-Time specifications, output settling time is defined as the output voltage having reached 1% of its final value and the load current having reached at least 80% of its final value. MTBF is calculated using TELCORDIA SR-332 Method 1 Case 3, ground fixed, +25C ambient air and full-load conditions. Contact DATEL for demonstrated life test data. All models are fully operational and meet all published specifications, including "cold start," at -40C.
Output
VOUT Range: (over line, load and temperature) Minimum Loading Per Spec Ripple/Noise (20MHz BW) Line/Load Regulation Efficiency Isolation Voltage: Input/Output Isolation Resistance Isolation Capacitance Current Limit Inception Short Circuit Current Overvoltage Protection Capacitive Loading (Resistive Load) Temperature Coefficient Dynamic Load Response (50-75% load step to within 1.5% of VOUT) Start up time: VIN to VOUT On/Off to VOUT Switching Frequency, Fixed Calculated MTBF Operating PCB Temperature without Derating Thermal Shutdown Storage Temperature Dimensions Pin Material underplate Weight 9.6 to 13.5V No load See Performance Spec See Performance Spec See Performance Spec 2250Vdc min. (BASIC) 10M 470pF 25-28 Amps @ 98% VOUT TBD 13.85V 10000uF 0.02% /C Output Current
Absolute Maximum Ratings
Input Voltage: Continuous or transient Input Reverse-Polarity Protection
60 Volts None (Input current must be <1.5A all the time) Current limited. Devices can withstand an indefinite output short -55 to +125C +300C
circuit without damage. Storage Temperature Lead Temperature (soldering, 10 sec.)
These are stress ratings. Exposure of devices to any of these conditions may adversely affect long-term reliability. Proper operation under conditions other than those listed in the Performance/Functional Specifications Table is not implied.
Dynamic Characteristics
100sec 30 msec 30 msec 150kHz ( TBD)
Typical Performance Curves
Output Voltage vs. Output Current (Ratio = 4:1, Output Impedance = 20m ) 15 14 Output Voltage (Volts)
Environmental
TBC million hours -40 to +100C +115 to +125C -55 to +125C
VIN = 56V
13 12 11 10 9
0 2 4 6 8 10 12 14 16 18 20 22 24
Physical
See Mechanical Dimensions Copper, solder coated over nickel 1.62 ounces (46 grams)
VIN = 48V VIN = 40.5V
Primary to Secondary Insulation Level Basic
Output Current (Amps)
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MDC_QBC.A02 Page 3 of 6
QBC Series
48VIN, 12V/22A Output High Efficiency, 1/4-Brick Bus Converters
Typical Performance Curves
QBC-12/22-L48 Efficiency vs. Line Voltage and Load Current 98
QBC-12/22-L48 Maximum Output Current vs. Ambient Temperature
96
94
92
VIN = 42V
90
VIN = 48V VIN = 53V
88
86 2 4 6 8 10 12 14 16 18 20
Ambient Temperature (C)
Load Current (Amps)
QBC-12/22-L48 Maximum Output Current vs. Ambient Temperature
Output Current (Amps)
Efficiency (%)
QBC-12/22-L48 Maximum Output Current vs. Ambient Temperature
Output Current (Amps)
Ambient Temperature (C)
Output Current (Amps)
Ambient Temperature (C)
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MDC_QBC.A02 Page 4 of 6
QBC Series
48VIN, 12V/22A Output High Efficiency, 1/4-Brick Bus Converters
Typical Performance Curves
QBC-12/22-L48 Temperature Derating
QBC-12/22-L48 Temperature Derating
Output Current (Amps)
Ambient Temperature (C)
Output Current (Amps)
Ambient Temperature (C)
QBC-12/22-L48 Temperature Derating
Output Current (Amps)
Ambient Temperature (C)
USA: UK: France: Japan:
Mansfield (Ma), Tel: (508) 339-3000, email: sales@murata-ps.com Milton Keynes, Tel: +44 (0)1908 615232, email: mk@murata-ps.com Montigny Le Bretonneux, Tel: +33 (0)1 34 60 01 01, email: france@murata-ps.com Tokyo, Tel: 3-3779-1031, email: sales_tokyo@murata-ps.com Osaka, Tel: 6-6354-2025, email: sales_osaka@murata-ps.com Website: www.murata-ps.jp Shanghai, Tel: +86 215 027 3678, email: shanghai@murata-ps.com Guangzhou, Tel: +86 208 221 8066, email: guangzhou@murata-ps.com
Canada: Toronto, Tel: (866) 740 1232, email: toronto@murata-ps.com
Murata Power Solutions, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A. Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356
www.murata-ps.com email: sales@murata-ps.com ISO 9001 REGISTERED
06/09/08
Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. (c) 2008 Murata Power Solutions, Inc.
Germany: Munchen, Tel: +49 (0)89-544334-0, email: munich@murata-ps.com
China:
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Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
MDC_QBC.A02 Page 5 of 6

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