QHS25ZG-7 [BEL]
DC-DC Regulated Power Supply Module, 1 Output, Hybrid, QUARTER BRICK PACKAGE-8;
| 型号： | QHS25ZG-7 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | DC-DC Regulated Power Supply Module, 1 Output, Hybrid, QUARTER BRICK PACKAGE-8 |
| 文件： | 总9页 (文件大小：158K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
Features
•
•
Low profile – 12.7 mm height
Input/output isolation: 1500VDC, basic
insulation
•
•
•
•
•
•
•
•
•
High efficiency - up to 92% at full load
Start-up into high capacitive load
Low conducted and radiated EMI
Output overcurrent protection
Output overvoltage protection
Back drive protection
Overtemperature protection
Remote sense
Remote on/off (primary referenced), positive
or negative logic
Applications
• Distributed power architectures
• Telecommunications equipment
• LAN/WAN applications
•
•
Output voltage trim adjust
UL 1950 Recognition, CSA 22.2 No. 950-95
certification, TUV IEC950
• Data processing applications
Description
The QHS is a series of high efficiency, high-density, single output DC/DC converters for on-board conversion
of standard telecom and datacom input voltages into isolated low voltage outputs in a through-hole mounting
package. The two-board construction provides a cool environment for control components and the integrated
metalic substrate PCB provides superior thermal management for power components resulting in enhanced
product reliability. A heatsink can be conveniently and effectively attached to the IMS base plate for
operations in elevated ambient conditions or where airflow is minimal.
Selection Chart
Model
Input
Voltage
VDC
Input
Current,
Max
Output
Voltage
Vout,
Output Rated
Output
Ripple/Noise,
mV p-p
Typical
Efficiency
Current
I rated,
ADC
12
@ I rated,
%
ADC
VDC
QHS12ZH
QHS25ZG
QHS40ZE
QHS40ZD
QHS40ZB
QHS50ZA
QHS50ZY
36-75
36-75
36-75
36-75
36-75
36-75
36-75
4.5
4.3
4.5
3.3
2.5
2.7
2.3
12.0
5.0
3.3
2.5
1.8
1.5
1.2
150
150
150
100
100
100
100
91
92
89
88
85
79
76
25
40
40
40
50
50
REV. AUG 28, 2002
Page 1 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect
long-term reliability and cause permanent damage to the converter.
Parameter
Input voltage
Conditions/Description
Continuous
Transient
Base Plate Temperature
Min
Max
75
80
100
125
20
Units
VDC
VDC
°C
°C
VDC
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
-40
-40
Referenced to -Vin
Environmental and Mechanical Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Shock
Sinusoidal Vibration
Weight
Conditions/Description
Halfsine wave, 3 axes
GR-63-Core, Section 5.4.2
Min
50
1
Nom
Max
Units
g
g
1.2/35
Yes
1,980
Oz/g
Water Washing
MTBF
Standard process
Per Bellcore TR-NWT-000332
kHrs
Isolation Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
Insulation Safety Rating
Isolation Voltage
Isolation Voltage
Isolation Resistance
Isolation Capacitance
Basic
Input to output, input to base plate 1500
VDC
VDC
MOhm
pF
Output to base plate
500
10
1000
Input Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Input Voltage
Turn-On Input Voltage
Turn-Off Input Voltage
Input over voltage protection
Turn-On Time
Conditions/Description
Continuous
Min
36
Nom
48
34
Max
75
Units
VDC
VDC
VDC
VDC
ms
Ramping Up
Ramping Down
Ramping up
33
76
84
5
To Output Regulation Band
100% Resistive Load
Full Load, 12uH source
inductance
Input Reflected Ripple Current
Inrush Transient
60
mA p-p
A2s
Vin=Vin.max
0.1
REV. AUG 28, 2002
Page 2 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
Output Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
Output Voltage Setpoint Accuracy
Vin=Vin.nom, Full Load
1.8V
2.5V
3.3V
-1.67
-2.00
-1.5
-2.0
0
1.67
2.00
1.5
2.0
100
%Vout
%Vout
%Vout
%Vout
12V
Output Current*
See selection chart for Irated
%Irated
%Vout
Line Regulation
Load Regulation
0.2
Vin.min to Vin.max, Irated
Vin=Vin.nom, 10% to
0.75
%Vout
100%Irated
Total output voltage regulation
Over all input voltage, load,
and temperature conditions
-3
3
%Vout
%Vout
Remote Sense Headroom***
Dynamic Regulation
Peak Deviation
10%
50-75% load step change
to 1% error band
5
250
%Vout
µs
Settling Time
Admissible Load Capacitance
27,000
8,000
150
µF
I
rated, Nom Vin
12V
µF
Output Current Limit Threshold**
Switching Frequency
Vout≤0.97Vout.nom
110
%Irated
kHz
kHz
2.5V and 1.8V
3.3V
300
450
400
12V
kHz
Overvoltage Protection,
Non Latching
Over all input voltage and
load conditions
120
90
140
110
%Vout
Trim Range
%Vout
Irated, Vin=Vnom
* At Iout<Iout.min, the output may contain low frequency component that exceeds ripple specifications.
** Overcurrent protection is non-latching with auto recovery.
*** Vout can be increased up to 10% via the sense leads or up to 10% via the trim function, however total
output voltage trim from all sources should not exceed 10% of Vout
Feature Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise
noted.
Parameter
Shutdown (ON/OFF)
Negative Logic
Converter ON
Source Current
Converter OFF
Open Circuit Voltage
Positive Logic
Conditions/Description
On/Off signal is low – converter is ON
ON/OFF pin is connected to -Vin
Min
Nom
Max
Units
-0.5
3.5
1.8
1
20
5
VDC
mADC
VDC
ON/OFF pin is floating
On/Off signal is low–converter is OFF
VDC
Converter ON
3.5
20
5
1.8
1
VDC
VDC
VDC
mADC
°C
Open Circuit Voltage
Converter OFF
Source Current
Overtemperature
Protection
ON/OFF pin is floating
-0.5
ON/OFF pin is connected to -Vin
Average board temperature
105
REV. AUG 28, 2002
Page 3 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
Characteristic curves
90
85
80
75
70
65
60
55
95
90
85
80
EFF.(36V)
EFF.(48V)
EFF.(75V)
75
EFF.(35V)
70
65
60
EFF.(48V)
EFF.(75V)
10 20 30 40 50 60 70 80 90 100
LOAD %
10 20 30 40 50 60 70 80 90 100
LOAD %
Figure 1. QHS12ZH Efficiency vs. Output Load
Figure 4. QHS40ZB Efficiency vs. Output Load
95
90
85
80
75
EFF.(36V)
70
65
60
EFF.(48V)
EFF.(75V)
10 20 30 40 50 60 70 80 90 100
LOAD %
Figure 2. QHS40ZE Efficiency vs. Output Load
95
90
85
80
75
EFF.(36V)
70
EFF.(48V)
EFF.(75V)
65
60
10 20 30 40 50 60 70 80 90 100
LOAD %
Figure 3. QHS40ZD Efficiency vs. Output Load
REV. AUG 28, 2002
Page 4 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
3
2.5
2
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
1.5
1
0.5
0
0
10
20
30
40
50
60
70
0
10
20
30
40
50
60
70
Input Voltage (V)
Input Voltage (V)
Figure 5. QHS12ZH Input Characteristic
Figure 8. QHS40ZB Input Characteristic
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
0
10
20
30
40
50
60
70
Input Voltage (V)
Figure 6. QHS40ZE Input Characteristic
4
3.5
3
2.5
2
1.5
1
0.5
0
0
10
20
30
40
50
60
70
Input Voltage (V)
Figure 7. QHS40ZD Input Characteristic
REV. AUG 28, 2002
Page 5 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
When the ON/OFF pin is used to achieve remote
control, the user must take care to insure that the
pin reference for the control is really the -Vin pin.
The control signal must not be referenced ahead
of EMI filtering, or remotely from the unit.
Optically coupling the information and locating the
optical coupler directly at the module will solve
any of these problems.
Typical Application
Figure
9
below shows the recommended
connections for the QHS series converter.
QHS40ZX
Fuse
+Vo
+Vi
+Sense
C1
C2 C3
Trim
Note:
On/Off
-Vi
If the ON/OFF pin is not used, it can be left
floating (positive logic), or connected to the -Vin
pin (negative logic).
-Sense
-Vo
Figure 9. Typical application of QHS series
Output Voltage Trim
The QHS series converters do not require any
external components for proper operation.
However, if the distribution of the input voltage to
the converter contains significant inductance, the
capacitor C1 may be required to enhance
performance of the converter. A minimum of a
33μF electrolytic capacitor with the ESR<0.7Ω is
recommended for the QHS series.
Industry Standard Trim
The units trim up with a resistor from the TRIM pin
to the +Sense pin and trim down with a resistor
from the TRIM pin to the –Sense pin as shown in
the Figure 10.
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.
For output decoupling we recommend to use a
10μF tantalum and a 1μF ceramic capacitors
connected directly across the output pins of the
converter.
Note, that the capacitors do not
substitute the filtering required by the load.
Shutdown Feature Description
The ON/OFF pin in the QHS series converters
functions as a normal soft shutdown.
It is
Figure 10. QHS series positive trim schematic
referenced to the –Vin pin (see Figure 7). With
the positive logic, when the ON/OFF pin is pulled
low, the output is turned off and the unit goes into
a very low input power mode.
The equations below determine the trim resistor
value required to achieve a ΔV change in the
output voltage.
With negative logic, when the ON/OFF pin is
pulled low, the unit is turned on.
5.1Vo(100 + ∆%) 510
Radj − up =
−
−10.2) kΩ
1.225 %
%
∆
∆
An open collector switch is recommended to
control the voltage between the ON/OFF pin and
the -Vin pin of the converter. The ON/OFF pin is
pulled up internally, so no external voltage source
is required. The user should avoid connecting a
resistor between the ON/OFF pin and the +Vin
pin.
510
Radj − down =
−10.2) kΩ
%
∆
REV. AUG 28, 2002
Page 6 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
where ΔV% is the output voltage change
expressed in percents of the nominal output
voltage, Vout.
In order for the output of the QHS series 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:
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.
•
•
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
2. In order to avoid creating apparent load
regulation degradation, it is important that the
trim resistors are connected directly to the
remote sense pins, and not to the load or to
traces going to the load.
•
3. The QHS series converters will trim down
further than the 10% limit. In general, this is
permissible. The user must confirm that the
results are acceptable in the application.
hazardous voltages.
The entire system,
including the QHS converter, must pass a
dielectric withstand test for Reinforced
insulation. Design of this type of systems
requires
understanding
expert
of
engineering
the overall
and
safety
Safety Considerations
requirements and should be performed by
qualified personnel.
The QHS series converters feature 1500 Volt DC
isolation from input to output. The input to output
resistance is greater than 10MOhm.
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.
Thermal Considerations
The QHS series converters are designed for
natural or forced convection cooling.
The
maximum allowable output current of the
converters is determined by meeting the derating
criteria for all components used in the converters.
For example, the maximum semiconductor
junction temperature is not allowed to exceed
120°C to ensure reliable long-term operation of
the converters.
Contact Power-One for the
complete list of the derating criteria.
The QHS series converters have no internal fuse.
The external fuse must be provided to protect the
system from catastrophic failure as shown in
Figure 7. The user can select a fuse based upon
the highest inrush transient at the maximum input
voltage and the maximum input current of the
converter, which occurs at the minimum input
voltage. 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.
The graphs in Figures 10-12 show the maximum
output current of the QHS series converters at
different ambient temperatures under both natural
and forced (longitudinal airflow direction, from pin
1 to pin 3) convection.
For example, from Figure 11, the QHS40ZE
operating at 55C can deliver up to 18A reliably
with 100LFM forced air, while up to 25A reliably
with 400LFM forced air.
REV. AUG 28, 2002
Page 7 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
12
10
8
40
35
30
25
20
15
10
5
6
0
0
100LFM
200LFM
300LFM
400LFM
4
100LFM
200LFM
2
300LFM
400LFM
0
0
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
Figure 13. QHS40ZD (2.5V) derating curves
Figure 11. QHS12ZH (12V) derating curves
40
35
30
25
20
40
35
30
25
20
15
10
5
0
15
0
100LFM
200LFM
300LFM
400LFM
100LFM
10
200LFM
300LFM
5
400LFM
0
0
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
Figure 12. QHS40ZE (3.3V) derating curves
Figure 14. QHS40ZB (1.8V) derating curves
REV. AUG 28, 2002
Page 8 of 9
QHS Series – Quarter-Brick DC/DC Converter
48V Input
Data Sheet
12V, 5V, 3.3V, 2.5V, 1.8V, 1.5V, 1.2V Output
Mechanical Drawing
Pin
1
2
Function
-Vin
On/off
+Vin
Mechanical Tolerances
Inches
Millimeters
X.X +/-0.5
X.XX +/-0.020
X.XXX +/-0.010
3
X.XX +/-0.25
4
5
6
-Vout
-Sense
Trim
Pin
+/-0.002
+/-0.05
7
8
+Sense
+Vout
Ordering Information
Options
Suffixes to add to part number
Remote ON/OFF
Positive- Standard, no suffix required
Negative- Add “NT” suffix
0.18”- Standard, no suffix required
0.11”- Add “8” suffix
Pin Length
0.15”- Add “9” suffix
Notes
1. Consult factory for the complete list of available options.
2. Power-One products are not authorized for use as critical components in life support systems, equipment used in hazardous
environments, or nuclear control systems without the express written consent of the respective divisional President of
Power-One, Inc.
3. Specifications are subject to change without notice.
REV. AUG 28, 2002
Page 9 of 9
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