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Q-Class Converters
QHS12-120 Model
Features:
9
12 Volt / 12 Amp output
9
Greater than 92% Efficient
9
Industry Standard ¼ Brick package
9
Full 144 Watt capability to more than 70 °C
9
Output voltage trim capability
9
Thermal and overload protection
9
Microprocessor controlled supervisory functions
OBSOLETE PRODUCT
9 Out-gassing feature ensures reliable pin soldering
9 RoHS Compliant
Table 1
Input Characteristics
Input Voltage Operating Range
Input Voltage Transient Protection
Input Undervoltage Lockout
Input Overvoltage Lockout
Input Current
No-Load Input Current
Disabled Input Current
Input Reflected Ripple Current (2)
Inrush Current Transient
Enable Characteristics
Enable – Negative Logic Version
Enable – Positive Logic Version
Notes & Conditions (1)
Turn-on Threshold
Turn-off Threshold
Hysteresis Voltage
Turn-on Threshold
Turn-off Threshold
Hysteresis Voltage
Steady-State
Enabled state
Disabled state
Min
Typ.
36
48
32
31
Max
75
100
35
34
1
76
75
80
79
1
3.3
150
25
0.1
Internal pull-up voltage, ref. to Vi(-)
Input Impedance, internal pull-up
On State range
Off State range
5
100
-0.1
-0.1
0.8
0.8
Units
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
Vdc
A
mA
mA
mA p-p
A2s
Vdc
kOhms
Vdc
Vdc
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QHS12-6201001509_D01_21/04/08
Murata Power Solutions
Q-Class Converters
QHS12-120 Model
Table 2
Output Characteristics
Notes & Conditions (1)
Output Voltage Set Point
Output Line Regulation
Output Load Regulation
Output Voltage Total Regulation
Trim feature not used
Output Ripple Voltage & Noise (3)
Output Current Operating Range
Efficiency
Turn-On Time
Start-up Inhibit Time
20 MHz Bandwidth
Transient Response (4)
Remote Sense Compensation Range
(5), (6)
Output Voltage Trim Range (6)
Maximium Output Capacitance
Min
11.88
Typ.
12
11.8
1
50
0
100% Load
Vin present: Enable to 90% Vout
Enabled: Vin applied to 90% Vout
12.12
0.2
0.2
12.1
9
100
12
93
13
15
25% step, 0.1A/μs, ΔVo
Recovery Time
Of Output Voltage Set Point, typ.
Of Output Voltage Set Point, typ.
Max
-20
Units
Vdc
%
%
Vdc
mV p-p
A
%
ms
ms
200
300
+10
mV
μs
%
+10
%
μF
3,900
Table 3
Protection Characteristics
Output Over-Current Shutdown
Over Voltage Shutdown
Over Temperature Shutdown (7)
Notes & Conditions (1)
Non-Latching
Re-start rate
Latching
Non-Latching
Min
Typ.
Max
14
3
14
15.2
125
Units
A
s
Vdc
°C
Table 4
General Specifications
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Storage Temperature Range
Thermal Measurement Location
(TML) Temperature (9)
Operating Temperature Range
Semiconductor Junction Tempature
Material Flammability
MTBF
Switching Frequency
Dimension (LxWxH)
Notes & Conditions (1)
Min
Typ.
Max
Units
Input to Output
Input to Output
1500
10
Non-condensing
See mechanical drawing for location
-40
125
Vdc
Mohm
pF
°C
Measured at TML
Package Rating
UL 94V-0
Calculated (Bellcore TR-332)
Demonstrated
-40
120
150
°C
°C
6800
1.2
tbd
350
106 Hrs
106 Hrs
kHz
2.28”L x 1.45” W x 0.47”H
(57.91 x 36.83 x 11.8 mm)
Weight
grams
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QHS12-6201001509_D01_21/04/08
Murata Power Solutions
Q-Class Converters
QHS12-120 Model
Table 5
Standards Compliance
Notes & Conditions (8)
UL/CSA 60950
TUV
c-UL-us recognized (basic Insulation), UL File# E165113
(Bauart) certified
Notes:
(1)
Vin = 48Vdc, Ta = 25 °C, Airflow = 200 LFM unless otherwise noted.
(2)
Input Reflected Ripple Current is specified when measured with the filter shown in Figure 7.
(3)
Output Ripple Voltage and noise is specified when measured with a 10uF tantalum and a 1uF ceramic capacitor at the converter
output pins.
(4)
Transient response is specified without a capacitor at the output of the converter.
(5)
If remote sense is not required or used, the Sense(+) and Sense(-) pins must be connected to Vo(+) and Vo(-) respectively.
(6)
See ‘Remote Sense’ and ‘Trim Feature’ details regarding output voltage range limitations.
(7)
Thermal shutdown is monitored at the ‘Thermal Measurement Location” (TML). See ‘Mechanical Information’ on page 4 for the
thermal measurement location.
(8)
See ‘Safety Considerations’.
(9)
De-rating curves are conducted in a controlled environment. End application testing is required to ensure the Thermal Measurement
Location temperature is below the maximum specified.
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QHS12-6201001509_D01_21/04/08
Murata Power Solutions
Q-Class Converters
QHS12-120 Model
Mechanical Information
Figure 1
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Pin Assignment
Table 6
Pin #
Pin Name
Function
Notes & Conditions
1
2
Vi(+)
En
Positive Input Voltage
Input Enable / Disable
3
4
5
6
7
8
Vi(-)
Vo(-)
Sense(-)
Trim
Sense(+)
Vo(+)
Negative Input Voltage
Negative Output Voltage
Negative Remote Sense
Output Voltage Trim
Positive Remote Sense
Positive Output Voltage
Referenced to Vo(-).
No external source required.
Positive Logic: Floating = Enabled
Negative Logic: Floating = Disabled
Must be connected to Vo(-)
See ‘Trim Feature’ below
Must be connected to Vo(+)
Remote Sense
The remote sense regulates the output voltage across the sensing connections, and should be connected at the point on the board where
regulation is desired. It is used to compensate for contact and distribution losses to the load. Efforts should be made to minimize these
losses to help reduce noise and improve efficiency of the system.
Rcontact Rdistribution
Vo(+)
Sense(+)
Rtrim_up
or
Rtrim_down
Trim
Cload
Sense(-)
Iload
Vo(-)
Rcontact Rdistribution
Figure 2
The voltage between remote sense pins and the output terminals must not exceed the output voltage sense range as specified in Table 2.
[Vo(+) – Vo(-)] - [Sense(+) – Sense(-)]
≤
Sense Range % x set point
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Trim-up Feature
Trim-down Feature
The Trim-up configuration is used to increase the level of the
nominal output voltage.
This is achieved by connecting a resistor between Trim and
Sense(+) pins:
The Trim-down configuration is used to reduce the level of the
nominal output voltage.
Trim-down is achieved by connecting a resistor between Trim
and Sense(-) pins:
Vo(+)
Vo(+)
Sense(+)
Sense(+)
Rtrim_up
Trim
Cload
Trim
Iload
Sense(-)
Sense(-)
Vo(-)
Cload
Rtrim_down
Vo(-)
Figure 3
Figure 4
The value of the trim-up resistor is determined by the following
equation:
The value of the trim-down resistor is determined by the
following equation:
QHS12-120 Trim-up and Trim-down Resistance
Resistance (kOhms)
10000
The voltage between the Vo(+) and Vo(-) terminals must not
exceed the minimum output over voltage shut-down value
indicated in
Table 3. This limit includes any increase in voltage due to
remote-sense compensation and output voltage set-point
adjustment (trim).
Rup
Rdow n
1000
The amount of power delivered by the module is defined as the
voltage at the output terminals multiplied by the output current.
(Output Voltage Set Point, typ x Output Current, Max) When
using remote sense and/or trim, the output voltage of the module
can be increased, and may result in an increase of output
power. Care should be taken to ensure that the maximum output
power of the module remains at or below the maximum rated
power.
100
10
0
Figure 5
2
4
Delta (%)
6
8
10
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QHS12-6201001509_D01_21/04/08
Iload
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Efficiency Curves
Efficiency at 25 Degrees C
Figure 6 QHS12-120
Efficiency
Test Setup
Input Reflected Ripple
Input Reflected Ripple Test Circuit
is
ic
Vin
Vi(+)
12uH
220uF,
ESR<0.1 ohms
@ 100kHz
33uF,
ESR<0.7 ohms
@ 100kHz
RTN
DC-DC
Converter
Vi(-)
Figure 8 Input
Current at full load, 48Vdc input.
5 mA/div, 500 uS /div.
Figure 7 Test
circuit used for input ripple current
measurement
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Output Ripple/Noise
Figure 9 Output
ripple: Vin=48 Vdc, Iout=12 Amps.
Vert: 50 mV/div. Horiz: 2 uS/div
Load Transient +ve Step
Load Transient –ve Step
Figure 11 Top Trace: Load Current, 25% step,
5 A/div. Bottom Trace: Vout, 50 mV/div.
Horiz: 200 uS/div.
Figure 10 Top Trace: Load Current, 25% step,
5 A/div. Bottom Trace: Vout, 50 mV/div.
Horiz: 200 uS/div.
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Thermal Derating (Parallel) TTML=110C
Thermal Derating (Transverse) TTML=110C
12
12
Output Current [A]
15
Output Current [A]
15
9
0 LFM
6
100 LFM
9
0 LFM
6
100 LFM
200 LFM
200 LFM
300 LFM
3
300 LFM
3
400 LFM
400 LFM
Poly. (100 LFM)
Poly. (100 LFM)
0
0
25
35
45
55
65
75
25
85
35
45
Figure 12
15
12
12
Output Current [A]
Output Current [A]
75
85
Thermal Derating (Transverse) TTML=120C
15
9
0 LFM
100 LFM
9
0 LFM
6
100 LFM
200 LFM
200 LFM
300 LFM
3
65
Figure 13
Thermal Derating (Parallel) TTML=120C
6
55
Ambient Temperature [ºC]
Ambient Temperature [ºC]
300 LFM
3
400 LFM
400 LFM
Poly. (100 LFM)
Poly. (100 LFM)
0
0
25
35
45
55
65
75
25
85
35
45
55
65
75
Ambient Temperature [ºC]
Ambient Temperature [ºC]
Figure 14
Figure 15
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QHS12-6201001509_D01_21/04/08
85
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
Thermal Image, 300 LFM, Output to Input
71.4°C
70
E: 61.6
60
E: 61.6
D: 71.3
C: 71.7 F: 65.6
D: 71.3
C: 71.7G: 62.8
H: 64.2
F: 65.6
50
A: 61.8B: 64.6
A: 61.8B: 64.6
40
H: 64.2
G: 62.8
30
25.4°C
Figure 20 Parallel Airflow at 300 LFM, from output to input (right to left).
Ambient Temperature 25 °C. Vin = 48 V, and load current of 12 amps.
Turn-on (Vout vs Vin)
Turn-on (Enable)
Figure 17 Vin: 48 Vdc, load =
top trace (2): Vout, bottom
12 Adc plus 3,900 uf,
trace (1): Enable Signal,
transition from disable to enable.
Figure 16Figure
Converter
pre-enabled,
load = 12 Adcof test
18 include
description/condition
plus 3,900 uf, top trace(2): Vout, bottom trace (1):
Vin from 0 to 48 Vdc.
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
Murata Power Solutions
QHS12-120 Model
EMI Signature
Figure 19 Quasi-Peak
Measurement of positive input at 48Vdc and full load, with EMI filter as shown in Fig. 27.
External EMI Test Filter
1
+48v
2
10 nF
1
2
UUT
1 uF
RTN
100 uF
100v
3
Pulse
P0351
1.470 mH
4
3
10 nF
4
1 uF
Figure 20 EMI Filter as used for EMI measurement of Fig. 26
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QHS12-6201001509_D01_21/04/08
Q-Class Converters
QHS12-120 Model
Safety Considerations
This Product is certified to the standards listed in the ‘Standards Compliance’ section in the table above. If this product is built into
information technology equipment, the installation must comply with the above standard.
An external input fuse of 30 A maximum must be used to meet the above requirements.
The output of the converter [Vo(+)/Vo(-)] is considered to remain within SELV limits when the input to the converter meets SELV or TNV2 requirements.
The converters and materials meet UL 94V-0 flammability ratings.
Part Number Designations
RoHS Compliant
The QHS12-120 series of converters is in compliance with the European Union Directive 2002/95/EC (RoHS) with respect to the following
sustances: lead (Pb), mercury (Hg), cadmium (Cd), hexavalent chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers
(PBDE).
This product is subject to the following operating requirements
and the Life and Safety Critical Application Sales Policy:
Refer to: http://www.murata-ps.com/requirements/
Murata Power Solutions, Inc.
11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.
ISO 9001 and 14001 REGISTERED
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.
© 2012 Murata Power Solutions, Inc.
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QHS12-6201001509_D01_21/04/08