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Q-ClassConverters
QHS50-015 Model
OBSOLETE PRODUCT
Model
Parameter
1.5V
Units
Output Voltage Setpoint
1.48 – 1.52
Vdc
Line/Load Regulation
0.1%, 0.2%
% Vo
1.45 – 1.55
Vdc
90-110
%Vo,nom
Remote-sense Comp.
10%
V
Output Ripple & Noise (note 2)
Max
100
Output Current
Min
0.1
A
Max
50
A
Typ
86%
%
Max
10,000
μF
ΔVo
165
Ts
300
μs
1.86 – 2.01
V
60
A
Max
Output total regulation
Output adjust
Efficiency (48V, Full load, 25C)
External Capacitance
Transient Response (typ) (note3)
25% step, 1A/μs
Over-voltage trip point
Over-current trip point
Static
Typ
mVp-p
mV
All specifications at Ta=25C, Vin=48V, 300 LFM unless otherwise specified
For full details go to
www.murata-ps.com/rohs
www.murata-ps.com/support
Technical enquiries email: sales@murata-ps.com, tel: +508 339 3000
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QHS50-6201041525_C01_21/04/08
Q-ClassConverters
Murata Power Solutions
QHS50-015 Model
Parameter
Conditions
Input
Input Voltage (Vin)
Reflected Ripple Current (see note 1)
Input Current
Inrush Transient
Input Voltage Transient 100mS 10% duty cycle
Undervoltage Lockout
Turn-on
Turn-off
Over-voltage lockout
Turn-off
Turn-on
Input-Output
Resistance; input-output
Operating Ambient
Storage
Isolation
Temperature
Protection
Over-Temperature
Measured on PCB
Physical Information Dimensions
MTBF(Bellcore)
Typ.
Max.
Units
36
--
48
--
32
31
76
75
1500
10
-40
-40
75
10
3.3
0.2
100
35
34
80
79
---
85
125
Vdc
mA p-p
A
A2s
V
Vdc
Vdc
Vdc
Vdc
Vdc
Mohm
°C
°C
--
120
--
Deg C
2.28”L x 1.45” W x 0.47”H (57.91 x 36.83 x 11.8 mm)
Calculated at 40C ambient, 100% Iomax:
1,000,000 Hrs
The QHS50-012 Complies with IEC/EN/CSA/UL 60950, provides basic insulation, input to
output. c-UL-us (US and Canada) recognized. TUV (Bauart) approved.
Safety
QHS50-015 Thermal Derating
QHS50-015 Thermal Derating
Ver. Orientation (for 0LFM) and Hor. Orientation (for 50LFM,
Vin to Vout Airflow)
Airflow Parallel To Vin to Vout Tj = 120ºC
55
50
50
45
45
40
35
Output Current [A]
40
Output Current [A]
Min.
35
100 LFM
30
200 LFM
25
0 LFM
20
50 LFM
Poly. (50
LFM)
10
400 LFM
15
25
15
300 LFM
20
30
Poly. (100 LFM)
5
0
10
25
35
45
55
65
75
20
85
30
40
50
60
70
80
90
Ambient Temperature [ºC]
Ambient Temperature [ºC]
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QHS50-6201041525_C01_21/04/08
Q-ClassConverters
Murata Power Solutions
QHS50-015 Model
x
Pin Assignments
Pin #
1
2
3
Description
Vin (+)
Enable
Vin(-)
Pin #
4
5
6
Description
Vout(-)
Sense Vo adj
Pin #
7
8
Description
Sense +
Vo (+)
Notes:
1. Input Reflected Ripple is specified when measured with the filter shown below.
is
ic
L2
12uF
Vin
220uF,
ESR<0.1 Ohms
@ 100kHz
33uF,
ESR<0.7 Ohms
@ 100kHz
DC-DC
Converter
2. Output RTN
Ripple and noise is specified when measured with a 10uF tantalum and a 1uF ceramic
capacitor at the converter output pins.
3. Transient response is specified without a capacitor at the output of the converter.
4. The Enable signal is Logic Low. It is referenced to Vi-. The pin should be tied to Vi- if it is not
used. Isink = 1mA max, Voff = 15V max.
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3
QHS50-6201041525_C01_21/04/08
Q-ClassConverters
Murata Power Solutions
QHS50-015 Model
Q H S50-1.5V E fficiency
90
88
86
efficiency
84
82
80
36V
48V
75V
78
76
74
72
70
10
20
30
Iout
40
50
60
Output Ripple and Noise
(Vin=48V, Io=50A, 100Mz BW)
Output Voltage Response to Step Load (27A, -13.5A
load step, di/dt = 1A/us, Tamb=25C, Vin=48V)
Output Voltage Response to Step Load (27A, +13.5A
load step, di/dt = 1A/us, Tamb=25C, Vin=48V)
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4
QHS50-6201041525_C01_21/04/08
Q-ClassConverters
Murata Power Solutions
QHS50-015 Model
Input Reflected Ripple (Vin=48V, Iout=50A, 2mA/div., 100uS & 10uS/div.)
Startup Characteristics
Vin = 48V Iout = 0A Local O/P Sensing
Vin = 48V Iout = 55A Local O/P Sensing
Turn-Off Characteristic
Pre-Bias Startup Characteristic
Vin = 48V Iout = 55A 10mF output capacitance
Vin = 48V Pre-bias of 0.9V
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5
QHS50-6201041525_C01_21/04/08
Q-ClassConverters
Murata Power Solutions
QHS50-015 Model
Peak Noise @ Iout = 50 Amps
Conducted EMI Characteristic with
external filter as specified
QHS50-015 Trim-up and Trim-down Resistance
1000
Resistance (kOhms)
Rup
Rdown
100
10
0
2
4 Delta (%) 6
8
10
Safety considerations
The QHS series of converters comply with IEC/EN/CSA/UL 60950, providing basic insulation, input to output. c-UL-us
(US & Canada) and TUV approved. If this product is built into information technology equipment, the installation must
comply with the above standard. An external input fuse (5A to 30A recommended) 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 TNV-2 requirements.
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6
QHS50-6201041525_C01_21/04/08
Murata Power Solutions
Q-ClassConverters
QHS50-015 Model
Part Number Designations
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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QHS50-6201041525_C01_21/04/08