LI
FE
The QMS Series of converters provide a single, isolated step-down
voltage (3.3, 5 or 12 VDC nominal) from a wide-input voltage range (18
– 60 VDC). The QMS is an excellent choice in applications where
multiple input voltage options are required. The designer can use a
single QMS converter to cover both 24Vin and 48Vin input ranges,
eliminating the need to specify multiple circuit packs to handle each
input range. This is particularly useful in wireless base station
applications where the power plants tend to vary and could provide
nominal 24 or 48 V input.
EN
D
O
F
The QMS converters are highly efficient over the entire wide-input
voltage range, cost-effective, and offer a low profile, industry-standard
quarter-brick footprint. The standard feature set includes remote
on/off, remote output voltage sensing, industry-standard output trim,
input undervoltage lockout, and overtemperature shutdown with
hysteresis.
RoHS lead free solder and lead solder exempted products are available
Ultra-wide input range: 18 to 60 VDC
Cost-effective, single board construction
High efficiency
Low profile
Input-to-output isolation: 1500 VDC
Basic Insulation
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Input undervoltage lockout
Overtemperature protection
Approved to UL 60950-1/ CAN/CSA-C22.2 No. 60950-1, and TUV
approved to EN 60950-1, IEC 60950-1
QMS Series
2
1.
MODEL
INPUT
VOLTAGE VDC
INPUT
CURRENT, MAX
ADC 1
OUTPUT
VOLTAGE
VDC
OUTPUT RATED
CURRENT, IRATED ADC
OUTPUT RIPPLE/NOISE,
MVP-P2
TYPICAL EFFICIENCY
@ IRATED & 36VIN
QMS25DE
18 - 60
6.0
3.3
25
50
90%
QMS14DG
18 - 60
4.3
5.0
14
50
92%
QMS07DH
18 - 60
5.0
12.0
6.75
120
92%
This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should
be followed.
FE
Model numbers highlighted in yellow are not recommended for new designs.
2.
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect long-term reliability, and
cause permanent damage to the converter.
CONDITIONS/DESCRIPTION
Continuous
0
Input Voltage
Transient Withstand (100 ms)
3
Hot Spot Monitor Location (Tc)
Operating Temperature
Ambient
ON/OFF Control Voltage
Referenced to -Vin
QMS25DE
QMS14DG
CONDITIONS/DESCRIPTION
EN
D
PARAMETER
VDC
VDC
-40
125
C
-40
85
C
-40
125
C
-0.7
20
VDC
82.5
W
70
W
81
W
MIN
Operating Humidity
Relative Humidity, Non-cond.
Storage Humidity
Relative Humidity, Non-cond.
Shock
(Half-sinewave, 6 ms), 3 axes
50
Sinusoidal Vibration
GR-63-CORE, Section 5.4.2
1
Weight
Water Washing
Standard process
MTBF (Calculated)
Per Telcordia SR-332 Issue 1, (method 1, case 2, GB, 40OC)
Dimensions
(Overall)
Markings & Labeling
Includes P/N, Logo, Date Code, Country of Manufacture
UNITS
60
QMS07DH
3.
MAX
100
O
Output Power
4
F
Ambient
Storage Temperature
MIN
LI
PARAMETER
NOM
MAX
UNITS
95
%
95
%
g
g
1.2/35
Oz/g
Yes
1,750
kHrs
2.28 (57.9) x 1.45 (36.8)
x 0.43 (11)
In. (mm)
1
@ VIN minimum.
Nominal, (DC to 500 kHz)
3 See temperature probe location TC, Figure 36. [Ref.V09 case]
4 With appropriate power derating, see Figures 37 – 42.
2
tech.support@psbel.com
QMS Series
3
4.
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
PARAMETER
CONDITIONS/DESCRIPTION
MIN
NOM
Insulation Safety Rating
MAX
UNITS
Basic
Isolation Voltage
Input to Output
1500
VDC
Isolation Resistance
Input to Output
10
MΩ
Isolation Capacitance
Input to Output
SAFETY AGENCY
STANDARD APPROVED TO:
UL
UL60950-1 / CSA C22.2 No. 60950-1-03
TUV product service
TUV EN60950-1/A11:2004
CB report
IEC60950-1:2001
Declaration of Conformity
DIR 73/23/EEC Low Voltage Directive
5.
MARKING
cURus
TUV PS Baurt mark
N/A
(with external EMI filter)
LI
Conducted Emissions
5
pF
FE
4700
CE
CISPR 22 class A
6.
F
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
CONDITIONS/DESCRIPTION
MIN
Input Voltage
Continuous
18
Turn-On Input Voltage
(UVLO)6
Turn-Off Input Voltage
6
Turn-Off Hysteresis
O
PARAMETER
NOM
MAX
UNITS
60
VDC
Ramping Up
16
17
18
VDC
Ramping Down
13
15
16.5
VDC
2
VDC
@ IRATED, 12µH source inductance
BW=20MHz7
10
72
mAP-P
No-load Input Current
18VDC < Vin < 60VDCc
90
150
mA
5
W
50
mA
1.4
µF
EN
D
Input Reflected Ripple
Current
No-load Power Dissipation
Vin = 36VDC
Disabled Input Current
18VDC < Vin < 60VDC
25
Input Capacitance (internal)
Minimum Input
Capacitance (external)
(ESR >>
O
Output Power
8
0.3
%
25
mV
FE
Line Regulation
Slew = 0.1A/s >>>
0.75
%
0.02
%/C
3.48
VDC
+/- 5.5
%
82.5
W
25
A
150
%Iomax
50
100
mVP-P
1.5
3.0
%
17
35
mVRMS
+/-165
500
+/-330
1,000
mV
s
+/-165
500
+/-330
1,000
mV
s
Vin NOM, IO = IRATED
90
Turn-on Overshoot12
Overall input voltage, load,
and temperature conditions
5
10
%Vout
10
150
ms
50
250
ms
1
2
ms
8,220
F
EN
D
Efficiency11
(TAMB=40C)
Turn-On Time
f (VIN)12
f (On/Off)13
Turn-On Time
Rise Time12
Admissible Load
Capacitance14
Switching Frequency
8 see
Time from Vin=UVLO to
90% of VoutNOM
Time from enable to
2
90% of VoutNOM
From 10 to 90% of VoutNOM
Irated, Nom Vin
330
300
%
kHz
Figures 37 and 40
9
see Figure 18 for ripple waveform and Figure 46 for measurement method
see Figures 12 and 15
11 see Figure 3
12 see Figure 6
13 see Figure 9
14 A minimum 330 µF (AVX, TPSD337K006R0045) is recommended for operation over full load, line and temperature range
10
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QMS Series
5
PARAMETER
CONDITIONS/DESCRIPTION
MIN
NOM
MAX
UNITS
Output Voltage (Set-point)
Vi = 36 V, Io =14 A
4.925
5.0
5.075
VDC
Line Regulation
Vi =18 V to 60 V, Io =50% Io.max
Load Regulation
mV
%
25
mV
0.5
%
0.02
%/C
Vi =36V, Io.min to Io.max
FE
-40 C < TAMB < +85 C
Temperature Coefficient
4.76
Total Error Band
Output Power
15
0.3
(Line, Load, Temperature, Ripple, Life)
15
w/ proper thermal derating
Output Current15
w/ proper thermal derating
Output Current Limit Threshold
Vin = 36 V, Vo < 90%Vonom
0
%
70
W
14
A
%Iomax
120
mVP-P
1.0
2.4
%
17
42
mVrms
75-100-75% load step change,
to 1% error band, Co=0 µF
Slew = 1.0A/s >>>
+/250
500
+/-500
1,000
mV
s
Slew = 0.1A/s >>>
+/250
500
+/-500
1,000
mV
s
-40 C < TAMB < +85 C
F
O
Dynamic Regulation17
Peak Deviation
Settling Time
Peak Deviation
Settling Time
+/- 4.8
160
Over line and load,
(DC to 20 MHz)
Output Ripple16
VDC
50
LI
120
5.24
Efficiency 18
(TAMB=40C)
VinNOM, IO = IRATED
92
Turn-on Overshoot19
Overall input voltage, load,
and temperature conditions
5
10
%Vout
10
150
ms
50
250
ms
3
6
ms
Turn-On Time
Time from Vin=UVLO to
90% of VoutNOM
Time from enable to
Rise Time19
Admissible Load Capacitance
2
90% of VoutNOM
EN
D
Turn-On Time
f (VIN)19
f (On/Off)20
From 10 to 90% of VoutNOM
21
IRATED, Nom Vin
220
Switching Frequency
%
4,600
330
F
kHz
15
see Figures 38 and 41
see Figure 19 for ripple waveform and Figure 46 for measurement method.
17 see Figures 13 and 16
18 see Figure 4
19 see Figure 7
20 see Figure 10
16
21
A minimum 220 µF (AVX, TPSD227K010R0050) is recommended for operation over full load, line and temperature range.
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QMS Series
6
7.3
PARAMETER
CONDITIONS/DESCRIPTION
MIN
NOM
MAX
UNITS
Output Voltage (Set-point)
Vi = 36 V, Io =6.75 A
11.82
12.0
12.18
VDC
Line Regulation
Vi =18V to 60 V, Io =50% Io.max
Load Regulation
Temperature Coefficient
Output Current
22
Output Current Limit Threshold
-40 C < TAMB < +85 C
(Line, Load, Temperature, Ripple, Life)
w/ proper thermal derating
w/ proper thermal derating
mV
%
0.02
%/C
12.56
VDC
+/4.7
%
81
W
0
6.75
A
170
%Iomax
200
mVP-P
1.0
1.67
%
42
70
mVRMS
75-100-75% load step change,
to 1% error band, Co=0 µF
Slew = 1.0A/s >>>
+/600
500
+/1,200
1,000
mV
s
Slew = 0.1A/s >>>
+/600
500
+/1,200
1,000
LI
-40 C < TAMB < +85 C
F
Over line and load,
(DC to 20 MHz)
O
Dynamic Regulation24
Peak Deviation
Settling Time
Peak Deviation
Settling Time
60
0.5
130
Vin = 36 V, Vo < 90%Vonom
120
Output Ripple23
%
FE
Output Power22
mV
Vi =36 V, Io.min to Io.max
11.44
Total Error Band
60
0.5
mV
s
Efficiency25
(TAMB=40 C)
VinNOM, IO = IRATED
92
Turn-on Overshoot26
Overall input voltage, load,
and temperature conditions
5
10
%Vout
50
150
ms
50
250
ms
8
ms
2,200
F
Turn-On Time
Time from Vin=UVLO to
Rise Time
26
Admissible Load Capacitance28
90% of VoutNOM
Time from enable to
EN
D
Turn-On Time
f (VIN)26
f (On/Off)27
90% of VoutNOM
From 10 to 90% of VoutNOM
Irated, Nom Vin
Switching Frequency
22
23
24
25
2
4
68
330
%
kHz
see Figures 39 and 42
see Figure 20 for ripple waveform and Figure 46 for measurement method.
see Figures 14 and 17
see Figure 5
26
see Figure 8
see Figure 11
28 A minimum 68 µF (AVX, TPSD686K020R0070) is recommended for operation over full load, line and temperature range.
27
tech.support@psbel.com
QMS Series
7
8.
All specifications apply over specified input voltage, output load, and @ 40 OC ambient temperature, unless otherwise noted.
PARAMETER
CONDITIONS/DESCRIPTION
MIN
NOM
MAX
UNITS
Overcurrent Protection
Type
Non-latching – auto-recovery, hiccup type.
Threshold
QMS25DE
31.2
37.5
ADC
QMS14DG
16.8
22.4
ADC
QMS07DH
8.8
11.5
ADC
FE
Vin = Vin NOM
Short Circuit29
QMS25DE
Hiccup Mode
QMS14DG
QMS07DH
Overvoltage Protection30
30
ARMS
17
22
ARMS
12
15
ARMS
140
%Vo
Clamp, non-latching, hiccup mode. Independent control loop, auto-reset.
Threshold
LI
Type
17
115
Overtemperature Protection
Non-latching, auto-recovery
Threshold
Temperature node: TC31
C
135
F
Type
9.
PARAMETER
On/Off32
Negative Logic (-N suffix)
CONDITIONS/DESCRIPTION
MIN
Positive Logic (-P suffix)
On/Off (pin 2)
(Primary side ref. to -Vin)
NOM
MAX
UNITS
-0.7
0.8
1.0
VDC
mADC
3.5
7
20
18
VDC
VDC
3.5
7
20
18
VDC
VDC
-0.7
0.8
1.0
VDC
mADC
10
%Vo
10
%Vo
(On/Off signal is low – converter is ON)
Converter ON
Sink current
Converter OFF
Open circuit voltage
(On/Off signal is low – converter is OFF)
EN
D
On/Off (pin 2)
(Primary side ref. to -Vin)
O
All specifications apply over specified input voltage, output load, and @ 40 OC ambient temperature, unless otherwise noted.
Converter ON
Open Circuit Voltage
Converter OFF
Sink current
Remote Sense
Remote Sense Headroom
Output Voltage Trim33
Trim Up
Trim Down
-10
%Vo
29
Refer to Figures 21, 22, 23.
Refer to Figures 24 – 29
31 Refer to Figure 36.
32 See Figure 30.
33 The output voltage of the units can be increased to a maximum of 10%. This is comprised of a combination of the remotesense and trim adjustment. Do not exceed 10% of Vonom between +Vout and –Vout terminals. Also refer to ”Output Voltage
Adjust” section and Figures 31 – 35 for clarification.)
30
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BCD.00837_AA
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QMS Series
8
10.
QMS25DE
100
80
70
60
50
40
FE
Efficiency (%)
90
18
36
60
2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0
Load (A)
Figure 1. QMS25DE, Input Reflected Riple Current (typ.)
f
(Line & load)
LI
Figure 3. Efficiency,
QMS14DG
100
80
F
Efficiency (%)
90
Conditions: Output current = 25 ADC (82.5 W).
Input voltage = 36 VDC.
Waveform: InputRRC < 10 mAP-P (measured)
Scale: 5mA/10mV or 5mA/division.
70
60
18
O
50
60
40
1.4 2.8 4.2 5.6 7.0 8.4 9.8 11.2 12.6 14.0
Load (A)
Figure 4. Efficiency,
f
(Line & load)
QMS07DH
100
90
Efficiency (%)
EN
D
36
80
70
60
18
50
36
60
40
0.7 1.4 2.1 2.8 3.5 4.2 4.9 5.6 6.3 7.0
Load (A)
Figure 5. Efficiency,
f
(Line & load)
Figure 2. UVLO Input Characteristics
tech.support@psbel.com
QMS Series
f
(VIN)
Vo Turn-on Characteristics,
Figure 6. QMS25DE, Turn-On @ Power-up (typ)
Output current: 25 ADC
Scale : 10V/div., 1ms/div.
Scale : 1V/div.
(ON/OFF)
Figure 1. QMS25DE, Turn-On via On/Off Ctrl (typ)
Conditions: Vin = 36 VDC, Cext=0 µF
Channel 1 - On/Off signal
Channel 2 - Output voltage
Time base = 20 ms/div.
Output current: 25 ADC
Scale : 2V/div.
Amplitude = 1V/div.
Delay time = 90ms (typ.)
O
F
LI
Conditions: Vin max., Cext = 0 µF
Channel 1 - Input voltage = 36 VDC
Channel 2 – Vout, TRISE = 1 ms
f
FE
Vo Turn-on Characteristics,
9
Figure 2. QMS14DG, Turn-On @ Power-up (typ)
Output current: 14 ADC
Scale : 20V/div., 1ms/div.
Scale : 1V/div.
EN
D
Conditions: Vin max., Cext = 0 µF
Channel 1 - Input voltage = 36 VDC
Channel 2 - Vout, TRISE = 3 ms
Figure 4. QMS07DH, Turn-On @ Power-up (typ)
Conditions: Vin max., Cext = 0 µF
Channel 1 - Input voltage = 36 VDC
Channel 2 - Vout, TRISE = 4 ms
Output current: 6.75 ADC
Scale : 10V/div., 2ms/div.
Scale : 2V/div.
Figure 3. QMS14DG, Turn-On via On/Off Ctrl (typ)
Conditions: Vin = 36 VDC, Cext = 0 µF
Channel 1 - On/Off signal
Channel 2 - Output voltage
Time base = 50 ms/div.
Output current: 14 ADC
Scale : 2V/div.
Amplitude = 1V/div.
Delay time = 200 ms (typ.)
Figure 5. QMS07DH, Turn-On via On/Off Ctrl (typ)
Conditions: Vin = 36 VDC, Cext = 0 µF
Channel 1 - On/Off signal
Channel 2 - Output voltage
Time base = 50 ms/div.
Output current: 6.75 ADC
Scale : 2V/div.
Amplitude = 2V/div.
Delay time = 200 ms (typ.
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QMS Series
10
Conditions: Vin = 36 VDC, Cext = 0 µF
Scale: 500 mV/div, 200 µs/div.
Scale: 500 mV/div, 200 µs/div.
Load: (25% load ∆) with slew rate: 1.0A/s
Load: (25% load ∆) with slew rate: 1.0A/s
Figure 6. QMS25DE Load Response (typ)
Figure 7. QMS25DE, Load Response (typ)
Channel 1- Voltage deviation: ~ 250 mVP (measured)
Channel 3 - Load switched from 18.75 A to 25 A
O
F
Channel 1- Voltage deviation: ~ 250 mVP (measured)
Channel 3 – Load switched from 18.75 A to 25 A
LI
FE
Conditions: Vin = 36 VDC, Cext = 0 µF
EN
D
Figure 8. QMS14DG, Load Response (typ)
Channel 1- Voltage deviation: ~ 175 mVP (measured)
Channel 3 - Load switched from 10.5 A to 14 A
Figure 10. QMS07DH, Load Response (typ)
Channel 1- Voltage deviation: ~ 225 mVP (measured)
Channel 3 - Load switched from 5.0 A to 6.75 A
Figure 9. QMS14DG, Load Response (typ)
Channel 1- Voltage deviation: ~ 200 mVP (measured)
Channel 3 - Load switched from 10.5 A to 14 A
Figure 11. QMS07DH, Load Response (typ)
Channel 1- Voltage deviation: ~ 225 mVP (measured)
Channel 3 - Load switched from 5.0 A to 6.75 A
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QMS Series
11
Conditions: Vin = 60 V and Iout = 14 A.
Channel 1 - Vo, (AC coupled), ~35 mVP-P (measured)
O
F
Conditions: Vin = 60 V and Iout = 25 A.
Channel 1 - Vo, (AC coupled), ~50 mVP-P (measured)
Figure 13. QMS14 Output Ripple & Noise (typ.)
LI
Figure 12. QMS25DE Output Ripple & Noise (typ.)
FE
EN
D
Figure 14. QMS07 Output Ripple & Noise (typ.)
Conditions: Vin = 60 V and Iout = 6.75 A.
Channel 1 - Vo, (AC coupled), ~50 mVP-P (measured)
When the output is loaded above the maximum output current rating, the voltage of the converter will reduce to maintain the
output power at a safe level. In the case of a high overload or short circuit condition where the output voltage is pulled below
50% of Vo-nom, the unit will enter into a “Hiccup” mode of operation. Under this condition, the converter will attempt to restart,
typically every 250 ms, until the overload has cleared. Because of very low duty cycle, the RMS value of output current is kept
low. Once the output current is reduced to within its rated range, the converter automatically exits the hiccup mode and
continues normal operation.
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QMS Series
12
QMS14DG
Figure 15, Short Circuit Behavior (typ.)
Figure 16, Short Circuit Behavior (typ.)
Condition: Vin=60VDC
ISC < 22 ARMS
Scale: 10 Amp/div.
Figure 17, Short Circuit Behavior (typ.)
Condition: Vin=60VDC
ISC < 15 ARMS
Scale: 10 Amp/div.
LI
Condition: Vin=60VDC
ISC < 30 ARMS
Scale: 10 Amp/div.
QMS07DH
FE
QMS25DE
The QMS converters will start-up into a pre-bias voltage of 50% VoNOM without damage.
EN
D
O
F
The output overvoltage protection consists of a separate control loop, independent of the primary control loop. This secondary
control loop has a higher voltage set point than the primary loop. In a fault condition, the converter enters a “Hiccup” mode of
operation, and ensures that the output voltage does not exceed Vovp max.
Figure 18. QMS25DE, Induced OVP Behavior (typ.)
Figure 19. QMS25DE, Induced OVP Behavior (typ.)
Conditions: Vin = 36 V,
Channel 1- Vo,
Conditions: Vin = 36 V,
Channel 1- Vo,
Iout = 75% load.
Scale: 1 V/div., 1 sec.div.
Iout = minimum load.
Scale: 1 V/div., 1 sec.div.
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QMS Series
13
Figure 20. QMS14DG, Induced OVP Behavior (typ.)
Figure 21. QMS14DG, Induced OVP Behavior (typ.)
Conditions: Vin = 36 V,
Channel 1- Vo,
Conditions: Vin = 36V,
Channel 1- Vo,
Iout = minimum load.
Scale: 1 V/div., 1 sec.div.
F
LI
FE
Iout = 75% load.
Scale: 1 V/div., 1 sec.div.
Figure 22. QMS07DH, Induced OVP Behavior (typ.)
Figure 23. QMS07DH, Induced OVP Behavior (typ.)
Conditions: Vin = 36 V,
Channel 1- Vo,
Conditions: Vin = 36 V,
Channel 1- Vo,
O
11.
Iout = 75% load.
Scale: 1 V/div., 1 sec.div.
Iout = minimum load.
Scale: 1 V/div., 1 sec.div.
EN
D
The QMS-Series has been designed for stability without external capacitance when used in low inductance input and output
circuits. In many applications, the inductance associated with the distribution of the power source to the input of the power
converter can negatively affect a converter’s stability. The addition of a 33 µF electrolytic capacitor with an ESR < 100 m,
across the input helps to ensure stability of the converter. This capacitor should be of suitably high quality and rated for effective
use at low temperatures as needed.
Refer to the “Inrush Current Control Application Note” on www.power-one.com for suggestions on how to limit the magnitude
of the inrush current.
Additionally, see the EMC section further below in this datasheet for discussion for other external component which may be
required for reduction of conducted emissions.
The QMS can support high amounts of output capacitance. Refer to “Output Specification” tables for details.
11.2
Refer to the “Inrush Current Control Application Note”: (http://www.power-one.com/technical/articles/dc-dc_1-app.pdf) for
suggestions on how to limit the magnitude of the inrush current.
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QMS Series
14
12.
(-x) “no suffix” model
With the positive logic model, when the ON/OFF pin is pulled low, the output is turned off and the unit draws less than 25 mA
of input current. If the ON/OFF pin is not used, it can be left floating
(-N) suffix model
LI
FE
With negative logic, when the ON/OFF pin is pulled low, the unit is turned on. If the ON/OFF pin is not used, it can be connected
to the -Vin pin.
Figure 30. On/Off Control
F
(Common to –x & –N models)
O
The ON/OFF pin in the QMS converter functions as a normal soft shutdown. The ON/OFF pin is pulled up internally, so no
external voltage source is required or recommended. The user should avoid connecting a resistor between the ON/OFF pin and
the +Vin pin. The ON/OFF pin is internally referenced to the –Vin pin. An open collector switch is recommended to control the
voltage between these two points.
The controlling signal must not be referenced ahead of EMI filtering, or remotely from the unit. Optical coupling the control
signal and locating the opto-coupler directly at the converter, is recommended for trouble-free operation.
The industry-standard trim feature allows the user to adjust the output voltage from its nominal value. This can be used to
accommodate production margin testing.
EN
D
13.
Output voltage adjustment is accomplished by connecting an external resistor between the Trim pin and to either the +VOUT or –
VOUT pins. That below defines the two versions as well as trim equations used to determine a trim resistor value for a certain trim
voltage.
Figure 31. QMS Trim Schematic
With an external resistor (RUP) connected between the Trim pin and +VOUT pin, the output voltage set-point (Vo) increases. The
following equation determines the required external resistor value to obtain an adjusted output voltage:
tech.support@psbel.com
QMS Series
15
511
5.11 Vout (100 V %)
RUP
10.22
1.225V %
V %
FE
Where Δ% is the percentage change from VoNOM.
Figure 32. QMS Trim Schematic
LI
With an external resistor (RDOWN) between the Trim pin and –VOUT pin the output voltage set-point (Vo) decreases. The following
equation determines the required external resistor value to obtain an adjusted output voltage:
F
511
RDOWN
10.22
Vo
%
Vo INCREASE
R-UP
(KΩ)
New Vo
(VDC)
1
869
3.33
Vo DECREASE
RΔVo%
DOWN
(KΩ)
1
501
EN
D
ΔVo%
O
QMS25DE Trim Values:
New Vo
(VDC)
3.27
2
436
3.37
2
245
3.23
3
292
3.40
3
160
3.20
4
220
3.43
4
118
3.17
5
177
3.47
5
92
3.14
6
148
3.50
6
75
3.10
7
127
3.53
7
63
3.07
8
112
3.56
8
54
3.04
9
100
3.60
9
47
3.00
10
90
3.63
10
41
2.97
Figure 24. QMS25DE Trim Characteristics
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QMS Series
16
QMS14DG Trim Values
ΔVo%
R-UP
(KΩ)
New Vo
(VDC)
ΔVo%
RDOWN
(KΩ)
New Vo
(VDC)
1
1585
5.05
1
501
4.95
2
798
5.10
2
245
4.90
3
536
5.15
3
160
4.85
4
404
5.20
4
118
4.80
5
326
5.25
5
92
4.75
6
273
5.30
6
75
4.70
7
236
5.35
7
63
4.65
8
207
5.40
8
54
4.60
9
186
5.45
9
47
4.55
10
168
5.50
10
41
4.50
FE
Vo DECREASE
Figure 25. QMS14DG Trim Characteristics
LI
Vo INCREASE
Vo DECREASE
ΔVo%
R-UP
(KΩ)
New Vo
(VDC)
1
4535
12.12
2
2287
12.24
3
1538
12.36
4
1164
12.48
5
939
12.60
6
789
7
682
8
9
10
ΔVo%
RDOWN
(KΩ)
New Vo
(VDC)
O
Vo INCREASE
F
QMS07DH Trim Values
501
11.88
2
245
11.76
3
160
11.64
4
118
11.52
5
92
11.40
12.72
6
75
11.28
12.84
7
63
11.16
602
12.96
8
54
11.04
539
13.08
9
47
10.92
489
13.20
10
41
10.80
EN
D
1
Figure 26. QMS07DH Trim Characteristics
Notes:
1. When the output voltage is trimmed up, the output power from the converter must not exceed its maximum rating. The power is
determined by measuring the output voltage on the output pins, and multiplying it by the output current.
2. In order to avoid creating apparent load regulation degradation, it is important that the trim resistors be connected directly to the
remote sense pins, and not to the load or to traces going to the load.
3. The output voltage increase can be accomplished either by the trim or by the remote sense or by the combination of both. In any
case, the absolute maximum output voltage increase shall not exceed the limits defined in the Features Specification section above.
4. Either Rup or Rdown should be used to adjust the output voltage according to the equations above. If both Rup and Rdown are used
simultaneously, they will form a resistive divider and the equations above will not apply.
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QMS Series
17
14.
QMS converters are designed for both natural and forced convection cooling. To achieve long term reliability, the recommended
power derating curves below, were established by comparing measured junction and hot spot temperatures against those allowed
per Power-One’s component derating guidelines
The graphs in Figures 37 thru 42 show the maximum recommended output current of each QMS converter at various ambient
temperatures under both natural and forced convection cooling (longitudinal airflow direction, from pin 1 to pin 3). Vin for both 24
VDC and 48 VDC conditions are shown.
15.
FE
Measurements requiring airflow were made in Power-One’s vertical wind tunnel equipment using both Infrared (IR) thermography as
well as the traditional thermocouple method. The converter was soldered to a test board consisting of a 0.060” thick printed wiring
board (PWB) with four layers. The top and bottom layers were not metalized. The two inner layers, comprised of two-ounce copper,
were used to provide traces for connectivity to the converter. The lack of metalization on the outer layers as well as the limited thermal
connection ensured that heat transfer from the converter to the PWB was minimized. This provides a worst-case but consistent
scenario for thermal derating purposes.
LI
With the converter installed into the host application, customer verification that all components are at or below their safe operating
temperatures may be performed similarly. However, for a more simplified testing method, monitoring the converter’s designated
thermal reference point (TC) will yield effective results.
The recommended location of the measuring thermocouple is shown below. This reference point should be maintained at < 125 OC.
EN
D
O
F
It is recommended to use a 32AWG to 40AWG thermocouple wire probe on the location identified below; labeled TC
Figure 27. Thermal Reference, TC.
(QMS25DE shown)
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QMS Series
18
16.
Direction of airflow: from –VIN (Pin 1) to +VIN (Pin 3)
25
15
NC (35 - 75 LFM)
100 LFM
200 LFM
10
5
20
15
NC (35 - 75 LFM)
10
200 LFM
300 LFM
400 LFM
5
0
40
55
70
Ambient Temperature (Deg C)
85
25
40
55
70
Ambient Temperature (Deg C)
85
LI
25
Figure 28. QMS25DE, Vin = 24 VDC
Figure 29. QMS25DE, Vin = 48 VDC
16
16
14
14
NC (25 - 35 LFM)
6
100 LFM
4
200 LFM
300 LFM
2
400 LFM
0
25
12
F
10
8
Load Current (A)
12
10
O
Load Current (A)
300 LFM
400 LFM
0
NC (25 - 35 LFM)
6
100 LFM
200 LFM
4
300 LFM
2
400 LFM
0
25
85
8
7
7
6
6
Load Current (A)
8
5
4
NC (25 - 35 LFM)
3
100 LFM
2
200 LFM
1
300 LFM
Figure 32. QMS07DH, Vin = 24 VDC
4
NC (25 - 35 LFM)
3
100 LFM
200 LFM
300 LFM
1
0
40
55
70
Ambient Temperature (Deg C)
85
5
2
400 LFM
25
40
55
70
Ambient Temperature (Deg C)
Figure 31. QMS14DG, Vin = 48 VDC
EN
D
40
55
70
Ambient Temperature (Deg C)
8
Figure 30. QMS14DG, Vin = 24 VDC
Load Current (A)
100 LFM
FE
20
Load Current (A)
Load Current (A)
25
400 LFM
0
85
25
40
55
70
85
Ambient Temperature (Deg C)
Figure 33. QMS07DH, Vin = 48 VDC
tech.support@psbel.com
QMS Series
19
17.
The QMS converters feature 1500 VDC isolation from the input-to-output. The input-to-output resistance is greater than 10 MΩ.
These converters are provided with Basic insulation between input and output circuits according to all IEC60950 based standards.
Nevertheless, if the system using the converter needs to receive safety agency approval, certain rules must be followed in the design
of the system. In particular, all of the creepage and clearance requirements of the end-use safety requirements must be observed.
These documents include UL60950 - CSA60950-00 and EN60950, although other or additional requirements may be needed for
specific applications.The QMS converter has no internal fuse. The external fuse must be provided to protect the system from
catastrophic failure. Refer to the “Input Fuse Selection for DC/DC converters” application note on www.power-one.com for proper
selection of the input fuse. Both input traces and the chassis ground trace (if applicable) must be capable of conducting a current of
1.5 times the value of the fuse without opening. The fuse must not be placed in the grounded input line, if any.
If the voltage source feeding the module is SELV or TNV-2, the output of the converter may be grounded or ungrounded.
If the voltage source feeding the module is ELV, the output of the converter may be considered SELV only if the output is
grounded per the requirements of the standard.
If the voltage source feeding the module is a Hazardous Voltage Secondary Circuit, the voltage source feeding the module
must be provided with at least Basic insulation between the source to the converter and any hazardous voltages. The entire
system, including the QMS converter, must pass a dielectric withstand test for Reinforced insulation. Design of this type
of system requires expert engineering and understanding of the overall safety requirements and should be performed by
qualified personnel.
LI
FE
In order for the output of the QMS converter to be considered as SELV (Safety Extra Low Voltage) or TNV-1, according to all IEC60950
based standards, one of the following requirements must be met in the system design:
Note: This information is provided for guidance only and the user is responsible for any design considerations regarding safety.
18.
F
The following conducted EMI filter configuration and component values are offered as a guideline to assist in designing an effective
filter solution in the actual application. Many factors can affect overall EMI performance; such as layout, wire routing and load
characteristics, among others. As a result, the final circuit configuration and component values may require adjustment.
PUPS
O
Vin+
F1
+Vin
+Vout
-Vin
-Vout
C1
C2
C4
C4
Case
EN
D
Vin-
Figure 34. EMI Filter Configuration
REF.
DES
DESCRIPTION
C1, C2
1 µF @100V MLC
AVX or Equivalent
100 µF @ 100V Alum.
Electrolytic
FC100V10A Input Filter
Module
Panasonic NGH Series
or Equiv.
C3, C4
F1
MANUFACTURER
Power-One
Figure 35. Conducted EMI Scan of the QMS25DE
(w/ Input Filter Components Designated in Table Above.)
Test conditions: Vin = 36 VDC, Io = 100% rated (82.5 W)
Test Specification: (CISPR-22) NE55022 Class A (Peak Detect)
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QMS Series
20
Alternate - Minimum Margin Filter Design
REF.
DES
DESCRIPTION
MANUFACTURER
Not Used
N/A
F1
FC100V10A Input Filter
Module
Power-One
FE
C1 – C4
Figure 36. Conducted EMI Scan of the QMS25DE
(w/ Input Filter Components Designated in Table Above.)
LI
Test conditions: Vin = 36 VDC, Io = 100% rated (82.5 W)
Test Specification: (CISPR-22) NE55022 Class A (Peak Detect)
19.
DUT
+Vin
F
To improve the accuracy and repeatability of ripple and noise measurements, Power-One utilizes the test setups shown in Figure 37
& 47 below.
Copper Plane (3 to 4 inches)
O
+Vo1
0.1uf
ceramic
10uF @ 35V
ESR=0.3
Tantalum
SCOPE
LOAD1
-Vo1
+Vin
EN
D
Figure 37. Output Ripple and Noise Set-up.
A BNC connector is used for measurements to eliminate noise pickup associated with long ground leads of conventional scope
probes. The load is located 3” to 4” away from the converter.
For output decoupling, we recommend using a 10μF low ESR tantalum (AVX TPSC106M025R0500 is used in Power-One test setup)
and a 0.1 μF ceramic capacitor. Note that the capacitors do not substitute for filtering required by the load.
TO OSCILLOSCOPE
BATTERY
Vi(+)
Ltest
12 uH
Cs 220 uF
ESR < 0.1 OHM
@ 20 ºC, 100 kHz
33 uF
ESR < 0.7 OHM
@ 20 ºC, 100 kHz
Vi(-)
Figure 38. Input Reflected Ripple Current Set-up
Note: Measure input reflected-ripple current with a simulated inductance (Ltest) of 12 µH. Capacitor CS offsets possible battery
impedance. Measure current as shown above.
tech.support@psbel.com
QMS Series
21
O
F
LI
FE
20.
MECHANICAL TOLERANCES & FINISHES:
Inches
X.X = ±0.5
X.XX = ±0.020
X.XX ±0.50
X.XXX = ±0.020
0.25 MIN
0.010 MIN
±0.05
±0.002
4.6mm [0.180”] (suffix -n/a)
±0.5
±.020
3.68mm [0.145”] (suffix -7)
±0.5
±.020
2.79mm [0.110”] (suffix -8)
±0.5
±.020
Location
Dimension
Pins 1-3 & 5-7
1.80mm dia.
Pins 4 & 8
2.1mm dia
EN
D
Millimeters
General Dimensions
Distance from tallest converter component to host board
Pins
Diameter
Length
Pin Shoulder
Material & Finish
PIN
FUNCTION
1
-Vin
2
On/Off
3
+Vin
4
-Vout
5
-Sense
6
Trim
7
+Sense
8
+Vout
Copper with Tin/Lead over Nickel
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QMS Series
22
21.
Example: QMS at 12 V with negative logic, and 3.68mm [0.145”] length pins = QMS07DH-N7
OPTIONS (Suffixes)
SERIES
# OUTPUTS
Io
Vin
RANGE
Vout
-
On/Off
Logic
Pin Length
QM
S
25
D
E, G, H
-
None, N
None, 7, 8
S = Single
Output
ADC
18 to 60
VDC
E = 3.3
G = 5.0
H = 12.0
-
None = Pos.
N = Nef
None (Standard) = 4.6mm [0.18”]
7 = 7.68mm [0.145’]
8 = 2.79mm [0.110’]
On/Off (pin 2)
(Primary side ref. to -Vin)
FE
Negative Logic (-N suffix)
RoHS Ordering Information
OPTIONS
SUFFIXES TO ADD TO PART NUMBER
RoHS lead solder exemption
No RoHS character required
Add “G” as the character of the part number
EN
D
O
F
LI
RoHS compliand for all 6 substances
NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems, equipment
used in hazardous environments, or nuclear control systems.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on the date
manufactured. Specifications are subject to change without notice.
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