QHS12ZH-NT9 [BEL]
1-OUTPUT DC-DC REG PWR SUPPLY MODULE;
| 型号： | QHS12ZH-NT9 |
| 厂家： | 
BEL FUSE INC. |
| 描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE 输出元件 |
| 文件： | 总10页 (文件大小：378K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Features
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•
Low profile – 12.7 mm height
Input/output isolation: 1500VDC, Basic
insulation
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•
•
•
•
•
•
•
•
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
Applications
Remote on/off (primary referenced), positive or
negative logic
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•
•
•
Distributed power architectures
Telecommunications equipment
LAN/WAN
•
•
Output voltage trim adjust
UL1950 recognition, CSA 22.2 No. 950-95
certification, TUV IEC950
Data processing
Description
The QHS is a series of high efficiency, high-density, single output dc-dc converters for onboard 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
metallic substrate PCB provides superior thermal management for power components resulting in enhanced
product reliability. A heat sink can be conveniently and effectively attached to the IMS base plate for operations in
elevated ambient conditions or where airflow is minimal.
Model Selection
Model
Input
Voltage
VDC
Input
Current, Max
ADC
Output
Voltage
Vout,
Output Rated
Current
I rated,
Output
Ripple/Noise,
mV p-p
Typical
Efficiency @
I rated,
%
VDC
ADC
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
12
25
40
40
40
50
50
150
150
150
100
100
100
100
91
92
89
88
85
79
76
REV. JUN 04, 2004
Page 1 of 10
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.
Table 1. Absolute Maximum Ratings
Parameter
Input voltage
Conditions/Description
Continuous
Min
Max
75
80
Units
VDC
VDC
Transient
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
Base Plate Temperature
-40
-40
100
°C
°C
VDC
125
20
Referenced to -Vin
Environmental and Mechanical Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Table 2. Environmental and Mechanical Specifications
Parameter
Shock
Conditions/Description
Halfsine wave, 3 axes
Min
50
1
Nom
Max
Units
g
Sinusoidal Vibration
Weight
GR-63-Core, Section 5.4.2
g
1.2/35
Yes
Oz/g
Water Washing
MTBF
Standard process
Per Bellcore TR-NWT-000332
1,980
kHrs
REV. JUN 04, 2004
Page 2 of 10
Isolation Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Table 3. Isolation Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
Insulation Safety Rating
Isolation Voltage
Basic
Input to output, input to base plate
Output to base plate
1500
500
10
VDC
VDC
MOhm
pF
Isolation Voltage
Isolation Resistance
Isolation Capacitance
1000
Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Table 4. Input Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
Input Voltage
Continuous
36
48
75
VDC
Turn-On Input Voltage
Turn-Off Input Voltage
Input over voltage protection
Turn-On Time
Ramping Up
Ramping Down
34
33
VDC
VDC
VDC
ms
Ramping up
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. JUN 04, 2004
Page 3 of 10
Output Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Table 5. Output Specifications
Parameter
Conditions/Description
Min
Nom
Max
Units
Output Voltage Setpoint Accuracy
Vin=Vin.nom, Full Load
1.8V
2.5V
-1.67
-2.00
-1.5
-2.0
0
1.67
2.00
1.5
%Vout
%Vout
%Vout
%Vout
%Irated
%Vout
%Vout
%Vout
3.3V
12V
2.0
Output Current*
Line Regulation
Load Regulation
Total output voltage regulation
See selection chart for Irated
Vin.min to Vin.max, Irated
100
0.2
Vin=Vin.nom, 10% to 100%Irated
0.75
3
Over all input voltage, load, and
temperature conditions
-3
Remote Sense Headroom***
Dynamic Regulation
Peak Deviation
10%
%Vout
50-75% load step change
5
%Vout
µs
Settling Time
to 1% error band
Irated, Nom Vin
12V
250
Admissible Load Capacitance
27,000
8,000
150
µF
µF
%Irated
kHz
Output Current Limit Threshold**
Switching Frequency
Vout≤0.97Vout.nom
2.5V and 1.8V
3.3V
110
300
450
400
kHz
12V
kHz
Overvoltage Protection,
Non Latching
Over all input voltage and load
conditions
120
90
140
110
%Vout
Trim Range
Irated, Vin=Vnom
%Vout
* 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
REV. JUN 04, 2004
Page 4 of 10
Feature Specifications
All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted.
Table 6. Feature Specifications
Parameter
Shutdown (ON/OFF)
Negative Logic
Conditions/Description
On/Off signal is low – converter is ON
ON/OFF pin is connected to -Vin
Min
Nom
Max
Units
Converter ON
Source Current
Converter OFF
-0.5
3.5
1.8
1
20
5
VDC
mADC
VDC
Open Circuit Voltage
Positive Logic
ON/OFF pin is floating
On/Off signal is low–converter is OFF
VDC
Converter ON
Open Circuit Voltage
Converter OFF
3.5
20
5
1.8
1
VDC
VDC
VDC
mADC
°C
ON/OFF pin is floating
-0.5
Source Current
Overtemperature Protection
ON/OFF pin is connected to -Vin
Average board temperature
105
Characteristic Curves
95
90
85
80
75
70
65
60
95
90
85
80
75
70
65
60
EFF.(35V)
EFF.(48V)
EFF.(75V)
EFF.(36V)
EFF.(48V)
EFF.(75V)
10 20 30 40 50 60 70 80 90 100
10 20 30 40 50 60 70 80 90 100
LOAD %
LOAD %
Figure 1. QHS12ZH Efficiency vs. Output Load
Figure 3. QHS40ZD Efficiency vs. Output Load
95
90
90
85
80
75
70
65
60
85
80
75
70
65
60
55
EFF.(36V)
EFF.(48V)
EFF.(75V)
EFF.(36V)
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 2. QHS40ZE Efficiency vs. Output Load
Figure 4. QHS40ZB Efficiency vs. Output Load
REV. JUN 04, 2004
Page 5 of 10
4
3.5
3
5
4.5
4
3.5
3
2.5
2
1.5
1
0.5
0
2.5
2
1.5
1
0.5
0
0
10
20
30
40
50
60
70
Input Voltage (V)
0
10
20
30
40
50
60
70
Input Voltage (V)
Figure 7. QHS40ZD Input Characteristics
Figure 5. QHS12ZH Input Characteristics
3
2.5
2
5
4.5
4
3.5
3
1.5
1
2.5
2
1.5
1
0.5
0
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 6. QHS40ZE Input Characteristics
Figure 8. QHS40ZB Input Characteristics
REV. JUN 04, 2004
Page 6 of 10
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 shows the recommended connections for the
QHS Series converter.
QHS40ZX
Note:
Fuse
If the ON/OFF pin is not used, it can be left floating (positive
logic), or connected to the -Vin pin (negative logic).
+Vo
+Vi
+Sense
C1
C2 C3
Trim
On/Off
-Vi
Output Voltage Trim
-Sense
-Vo
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
Figure 10.
Figure 9. Typical Application of the QHS Series
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.
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 using 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.
Figure 10. QHS Series Positive Trim Schematic
Shutdown Feature Description
The ON/OFF pin in the QHS Series converters
functions as a normal soft shutdown. It is 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 ∆V change in the
output voltage.
5.1Vo(100 + ∆%) 510
⎛
⎜
⎞
Radj − up =
−
−10.2) kΩ
⎟
With negative logic, when the ON/OFF pin is pulled low,
the unit is turned on.
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
⎟
∆%
⎝
where ∆V% is the output voltage change
expressed in percents of the nominal output
voltage, Vout.
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
REV. JUN 04, 2004
Page 7 of 10
Notes:
•
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
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 are connected directly to the
remote sense pins, and not to the load or to traces going to the
load.
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 expert engineering and under-
standing of the overall safety requirements
and should be performed by qualified
personnel.
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.
Safety Considerations
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 graphs in Figures 11-14 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.
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.
For example, from Figure 11, the QHS40ZE
operating at 55°C can deliver up to 18A reliably
with 100LFM forced air, while up to 25A reliably
with 400LFM forced air.
12
10
8
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:
6
0
4
100LFM
200LFM
2
•
If the voltage source feeding the module is SELV or
TNV-2, the output of the converter may be
grounded or ungrounded.
300LFM
400LFM
0
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
•
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.
Figure 11. QHS12ZH (12V) Derating Curves
REV. JUN 04, 2004
Page 8 of 10
40
35
30
25
20
15
10
5
40
35
30
25
20
0
15
10
5
0
100LFM
200LFM
300LFM
400LFM
100LFM
200LFM
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 12. QHS40ZE (3.3V) Derating Curves
Figure 14. QHS40ZB (1.8V) Derating Curves
40
35
30
25
20
15
10
5
0
100LFM
200LFM
300LFM
400LFM
0
25 30 35 40 45 50 55 60 65 70 75 80 85
Ambient Temperature (C)
Figure 13. QHS40ZD (2.5V) Derating Curves
REV. JUN 04, 2004
Page 9 of 10
Mechanical Drawing
Figure 15. Mechanical Drawing
Table 7. Pinout/Functions
Pin
1
Function
-Vin
2
3
On/off
+Vin
Mechanical Tolerances
Inches
4
5
6
7
-Vout
-Sense
Trim
+Sense
+Vout
Millimeters
X.X 0.5
X.XX 0.25
X.XX
0.020
X.XXX 0.010
8
Pin
0.002
0.05
Ordering:
Table 8. Ordering Information
Suffixes to add to part number
Options
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:
Consult factory for the complete list of available options.
NUCLEAR AND MEDICAL APPLICATIONS - 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.
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.
REV. JUN 04, 2004
Page 10 of 10
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