DC-DC Converters Bus Converter . Power Module Type
Low Profile Isolated
Safety
Approvals
OCP
OVP
Remote
ON/OFF
CQHS-series
Feature
5-year warranty
Compact DC-DC Converter, ” BRICK SIZE” which has been
standard size for Telecommunication Market
High efficiency (synchronous rectifier circuit)
High density
High reliability : not built-in aluminum and tantalum electrolytic
capacitor
Built-in overcurrent, overvoltage and thermal protection circuits
Built-in remote ON/OFF
Mounting hole (M3 tapped)
Optional parts
Heat sink (optional parts : CQHS300/CQHS350)
CE marking
Low Voltage Directive
RoHS Directive
UKCA marking
Electrical Equipment Safety Regulations
RoHS Regulations
Safety agency approvals
UL60950-1, C-UL, EN62368-1
www.cosel.co.jp/en/
December 27, 2022
CQHS-1
DC-DC Converters Bus Converter . Power Module Type
CQHS250
Ordering information
CQH
1
S
2
250
3
48
4
50
5
-O
6
1 Series name
2 Single output
3 Output wattage
4 Input voltage
48:DC36 - 76V
5 Output voltage
6 Optional
R : with Remote ON/OFF
Positive logic control
N :Auto restart in protection
circuit working
B : Base plate option with
Mounting hole M3
L2 :Pin length 5.3mm
R
MODEL
CQHS2504832
CQHS2504850
MAX OUTPUT WATTAGE[W]
252.8
250
DC OUTPUT
32V 7.9A
50V 5.0A
MODEL
CQHS2504832
CQHS2504850
VOLTAGE[V]
DC36 - 76
SPECIFICATIONS
INPUT
CURRENT[A]
*1
5.60typ
5.54typ
EFFICIENCY[%]
*1
94typ
94typ
START-UP VOLTAGE[V]
DC32 - 36
HYSTERESIS VOLTAGE[V]
DC2 min
VOLTAGE[V]
32
50
CURRENT[A]
7.9
5.0
LINE REGULATION[mV]
64max
100max
LOAD REGULATION[mV]
64max
100max
RIPPLE[mVp-p]
OUTPUT
RIPPLE NOISE[mVp-p]
-20 to +85C
Vin=36-60V *2 255max
-20 to +85C
Vin=60-76V *2 320max
400max
500max
-40 to -20C *2 320max
500max
-20 to +85C *2 320max
500max
-40 to -20C *2 410max
650max
TEMPERATURE REGULATION[mV] -40 to +85C 640max
1000max
DRIFT[mV]
185max
*3
START-UP TIME[ms]
120max
200max (DCIN 48V, Io=100%)
OUTPUT VOLTAGE ADJUSTMENT RANGE[V] *4
Fixed (TRM pin open), adjustable by external resistor
26.88 - 35.20
45.0 - 55.0
OUTPUT VOLTAGE SETTING[V] *1 31.68 - 32.32
49.50 - 50.50
OVERCURRENT PROTECTION Works over 105% of rating, low voltage protection (shut down) function is built-in.
PROTECTION OVERVOLTAGE PROTECTION[V] 36.80 - 44.80
CIRCUIT AND
REMOTE SENSING
Provided
OTHERS
REMOTE ON/OFF
Provided (Negative Logic L : ON, H :OFF)
INPUT-OUTPUT
ISOLATION
56.50 - 67.50
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
INPUT-BASE PLATE
*5
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
OUTPUT-BASE PLATE
*5
AC500V 1minute, Cutoff current = 100mA, DC500V 50MW min (20±15C)
OPERATING TEMP.,HUMID.AND ALTITUDE -40 to +85C, 20 - 95%RH (Non condensing) (Refer to “Derating”), 3,000m (10,000 feet) max
ENVIRONMENT
SAFETY
OTHERS
STORAGE TEMP.,HUMID.AND ALTITUDE
-40 to +100C, 20 - 95%RH (Non condensing), 9,000m (30,000 feet) max
VIBRATION
10 - 55Hz, 49.0m/s2 (5G), 3minutes period, 60minutes each along X, Y and Z axis
IMPACT
196.1m/s2 (20G), 11ms, once each along X, Y and Z axis
AGENCY APPROVALS
UL60950-1, C-UL (CSA60950-1), EN62368-1
CASE SIZE/WEIGHT
COOLING METHOD
57.9X10.5X22.76mm [2.28X0.41X0.9 inches] (WXHXD) / 30g max
58.4X12.7X23.26mm [2.3X0.5X0.92 inches] (WXHXD) / 45g max
*5
Convection / Forced air / Conduction
*1 At rated input(DC48V), rated load. Ta= 25C, 2m/s.
*2 Ripple and ripple noise is measured by using measuring board. Refer to the manual.
*3 Drift is the change in DC output for an eight hour period after a half-hour warm-up at 25C, with the input voltage held constant at the rated input/output.
*4 When the input voltage is in the range of DC36-40V, output voltage is limited. Refer to the manual.
*5 Base Plate Option.
CQHS-2
December 27, 2022
www.cosel.co.jp/en/
CQHS250
External view
Tolerance : ±0.5 [±0.02]
Weight : 30g max(DIP)
45g max(Base Plate)
Dimensions in mm, [ ]=inches
57.9
3.68 ±0.25
10.5max
[0.14]
[0.41]
[0.6]
RC
−VIN
3.81 ±0.2
[0.9]
+VOUT
+S
TRM
−S
−VOUT
+VIN
22.76
[0.3]
[2.0]
15.24
50.8
[0.15]
[2.28]
Model
[0.6]
15.24
7.62 ±0.2
1. DIP
±VOUT Pin
[0.14]
1.7
3.68 ±0.25
±VIN/RC/TRM/±S Pin
1 ±0.1
1.5 ±0.1
2. Base Plate (option B)
[0.6]
3.81±0.2
[0.15]
15.24
[0.92]
[0.6]
15.24
23.26
[2.0]
[0.3]
2-M3
Mounting Hole
12.7
[0.5]
Recommended size for processing PCB
(TOP VIEW)
RC
+VIN
−VOUT
−S
TRM
+S
+VOUT
6-
1.5
50.8
[2.0]
2-
Outline
Dimensions in mm, [
Div.:0.5inch
www.cosel.co.jp/en/
2
15.24
[0.6]
−VIN
3.81
[0.15]
7.62
[0.3]
3.68 ±0.25
[0.14]
[2.3]
50.8
[0.6]
15.24
7.62 ±0.2
58.4
Model
December 27, 2022
]=inches
CQHS-3
DC-DC Converters Bus Converter . Power Module Type
CQHS300
Ordering information
CQH
1
S
300
2
3
48
4
*Providing heat sink
as option
R
MODEL
CQHS3004832
CQHS3004850
MAX OUTPUT WATTAGE[W]
300.8
300
DC OUTPUT
32V 9.4A
50V 6A
MODEL
CQHS3004832
CQHS3004850
VOLTAGE[V]
DC36 - 76
50
5
-O
6
1 Series name
2 Single output
3 Output wattage
4 Input voltage
48:DC36 - 76V
5 Output voltage
6 Optional
R : with Remote ON/OFF
Positive logic control
T : with Mounting hole
f3.4 thru
SPECIFICATIONS
INPUT
CURRENT[A]
*1
6.67typ
6.65typ
EFFICIENCY[%]
*1
94typ
94typ
START-UP VOLTAGE[V]
DC32 - 36
HYSTERESIS VOLTAGE[V]
DC2 min
VOLTAGE[V]
32
50
CURRENT[A]
9.4
6.0
LINE REGULATION[mV]
64max
100max
LOAD REGULATION[mV]
64max
100max
RIPPLE[mVp-p]
OUTPUT
RIPPLE NOISE[mVp-p]
TEMPERATURE REGULATION[mV]
-20 to +100C *2 255max
-40 to -20C *2
320max
Vin=36-60V
400max
500max
-40 to -20C *2
400max
Vin=60-76V
500max
-20 to +100C *2 320max
500max
-40 to -20C *2 410max
650max
0 to +65C 320max
500max
-40 to +100C 640max
DRIFT[mV]
*3
START-UP TIME[ms]
OUTPUT VOLTAGE ADJUSTMENT RANGE[V] *4
1000max
120max
185max
200max (DCIN 48V, Io=100%)
Fixed (TRM pin open), adjustable by external resistor
27.2 - 35.2
45.0 - 55.0
OUTPUT VOLTAGE SETTING[V]* 1 31.68 - 32.32
49.50 - 50.50
OVERCURRENT PROTECTION Works over 105% of rating, low voltage protection (shut down) function is built-in.
PROTECTION OVERVOLTAGE PROTECTION[V] 36.80 - 44.80
CIRCUIT AND
REMOTE SENSING
Provided
OTHERS
REMOTE ON/OFF
Provided (Negative Logic L : ON, H :OFF)
ISOLATION
56.50 - 67.50
INPUT-OUTPUT
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
INPUT-BASE PLATE
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
OUTPUT-BASE PLATE
AC500V 1minute, Cutoff current = 100mA, DC500V 50MW min (20±15C)
OPERATING TEMP.,HUMID.AND ALTITUDE -40 to +100C (On aluminum base plate), 20 - 95%RH (Non condensing) (Refer to “Derating”), 3,000m (10,000 feet) max
ENVIRONMENT
SAFETY
OTHERS
STORAGE TEMP.,HUMID.AND ALTITUDE
-40 to +100C, 20 - 95%RH (Non condensing), 9,000m (30,000 feet) max
VIBRATION
10 - 55Hz, 49.0m/s2 (5G), 3minutes period, 60minutes each along X, Y and Z axis
IMPACT
196.1m/s2 (20G), 11ms, once each along X, Y and Z axis
AGENCY APPROVALS
UL60950-1, C-UL (CSA60950-1), EN62368-1
CASE SIZE/WEIGHT
57.9X12.7X36.8mm [2.28X0.5X1.45 inches] (WXHXD) / 75g max
COOLING METHOD
Conduction cooling (e.g. heat radiation from the aluminum base plate to the attached heat sink)
*1 At rated input(DC48V), rated load, and aluminum base plate temperature 25C.
*2 Ripple and ripple noise is measured by using measuring board with recommended capacitor Co & the film capacitor 0.1mF.
*3 Drift is the change in DC output for an eight hour period after a half-hour warm-up at 25C, with the input voltage held constant at the rated input/output.
*4 When the input voltage is in the range of DC36-40V, output voltage is limited. Refer to the manual.
CQHS-4
December 27, 2022
www.cosel.co.jp/en/
CQHS300
External view
±0.5
2-M3
[2.28]
50.8 ±0.5
Mounting Hole
[2.0]
47.24 ±0.5
[0.3]
[0.6]
7.62
+S
15.24
TRM
36.8 ±0.5
[0.3]
-S
RC
[0.3]
7.62 7.62
-VOUT
-VIN
[1.45]
2-º1.5 ±0.1
[1.86]
26.16 ±0.5
6-º1 ±0.1
[1.03]
57.9
+VOUT
+VIN
12.7±0.5
[0.15]
Lot No.
¶ Tolerance : ±0.3 [±0.012]
¶ Weight : 75g max
[0.5]
3.68 ±0.5
Name Plate
¶ Base Plate : Aluminum
¶ Dimensions in mm, [
]=inches
¶ Mounting hole screwing torque : 0.49N-m (5.0kgf-cm) max
Base plate (Aluminum)
¶ Recommended size for processing PCB
(TOP VIEW)
2-º2
26.16
[1.03]
7.62
[0.3]
15.24
[0.6]
3.81
[0.15]
6-º1.5
2-º3.5
47.24
[1.86]
50.8
[2.0]
www.cosel.co.jp/en/
¶ Dimensions in mm, [
]=inches
¶ Div.:0.5inch
December 27, 2022
CQHS-5
DC-DC Converters Bus Converter . Power Module Type
CQHS350
Ordering information
CQH
1
S
350
2
3
48
4
*Providing heat sink
as option
R
MODEL
CQHS3504832
CQHS3504850
MAX OUTPUT WATTAGE[W]
352
350
DC OUTPUT
32V 11A
50V 7A
MODEL
CQHS3504832
CQHS3504850
VOLTAGE[V]
DC36 - 65
50
5
-O
6
1 Series name
2 Single output
3 Output wattage
4 Input voltage
48:DC36 - 65V
5 Output voltage
6 Optional
R : with Remote ON/OFF
Positive logic control
T : with Mounting hole
f3.4 thru
SPECIFICATIONS
INPUT
CURRENT[A]
*1
7.8typ
7.76typ
EFFICIENCY[%]
*1
94typ
94typ
START-UP VOLTAGE[V]
DC32 - 36
HYSTERESIS VOLTAGE[V]
DC2 min
VOLTAGE[V]
32
50
CURRENT[A]
11.0 *5
7.0
LINE REGULATION[mV]
64max
100max
LOAD REGULATION[mV]
64max
RIPPLE[mVp-p]
OUTPUT
RIPPLE NOISE[mVp-p]
TEMPERATURE REGULATION[mV]
100max
-20 to +100C *2 255max
-40 to -20C *2
320max
Vin=36-60V
400max
500max
-40 to -20C *2
400max
Vin=60-65V
500max
-20 to +100C *2 320max
500max
-40 to -20C *2 410max
650max
0 to +65C 320max
500max
-40 to +100C 640max
DRIFT[mV]
*3
START-UP TIME[ms]
OUTPUT VOLTAGE ADJUSTMENT RANGE[V] *4
1000max
120max
185max
200max (DCIN 48V, Io=100%)
Fixed (TRM pin open), adjustable by external resistor
26.88 - 35.20
45.0 - 55.0
OUTPUT VOLTAGE SETTING[V]* 1 31.68 - 32.32
49.50 - 50.50
OVERCURRENT PROTECTION Works over 105% of rating, low voltage protection (shut down) function is built-in.
PROTECTION OVERVOLTAGE PROTECTION[V] 36.80 - 44.80
CIRCUIT AND
REMOTE SENSING
Provided
OTHERS
REMOTE ON/OFF
Provided (Negative Logic L : ON, H :OFF)
ISOLATION
56.50 - 67.50
INPUT-OUTPUT
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
INPUT-BASE PLATE
DC1,500V or AC500V 1minute, Cutoff current = 10mA, DC500V 50MW min (20±15C)
OUTPUT-BASE PLATE
AC500V 1minute, Cutoff current = 100mA, DC500V 50MW min (20±15C)
OPERATING TEMP.,HUMID.AND ALTITUDE -40 to +100C (On aluminum base plate), 20 - 95%RH (Non condensing) (Refer to “Derating”), 3,000m (10,000 feet) max
ENVIRONMENT
SAFETY
OTHERS
STORAGE TEMP.,HUMID.AND ALTITUDE
-40 to +100C, 20 - 95%RH (Non condensing), 9,000m (30,000 feet) max
VIBRATION
10 - 55Hz, 49.0m/s2 (5G), 3minutes period, 60minutes each along X, Y and Z axis
IMPACT
196.1m/s2 (20G), 11ms, once each along X, Y and Z axis
AGENCY APPROVALS
UL60950-1, C-UL (CSA60950-1), EN62368-1
CASE SIZE/WEIGHT
57.9X12.7X36.8mm [2.28X0.5X1.45 inches] (WXHXD) / 75g max
COOLING METHOD
Conduction cooling (e.g. heat radiation from the aluminum base plate to the attached heat sink)
*1 At rated input(DC48V), rated load, and aluminum base plate temperature 25C.
*2 Ripple and ripple noise is measured by using measuring board with recommended capacitor Co & the film capacitor 0.1mF.
*3 Drift is the change in DC output for an eight hour period after a half-hour warm-up at 25C, with the input voltage held constant at the rated input/output.
*4 When the input voltage is in the range of DC36-40V, output voltage is limited. Refer to the manual.
*5 Rated current is increased adjusting output voltage to lower than rated output voltage. Refer to the manual.
CQHS-6
December 27, 2022
www.cosel.co.jp/en/
CQHS350
External view
±0.5
2-M3
[2.28]
50.8 ±0.5
Mounting Hole
[2.0]
47.24 ±0.5
[0.3]
[0.6]
7.62
+S
15.24
TRM
36.8 ±0.5
[0.3]
-S
RC
[0.3]
7.62 7.62
-VOUT
-VIN
[1.45]
2-º1.5 ±0.1
[1.86]
26.16 ±0.5
6-º1 ±0.1
[1.03]
57.9
+VOUT
+VIN
12.7±0.5
[0.15]
Lot No.
¶ Tolerance : ±0.3 [±0.012]
¶ Weight : 75g max
[0.5]
3.68 ±0.5
Name Plate
¶ Base Plate : Aluminum
¶ Dimensions in mm, [
]=inches
¶ Mounting hole screwing torque : 0.49N-m (5.0kgf-cm) max
Base plate (Aluminum)
¶ Recommended size for processing PCB
(TOP VIEW)
2-º2
26.16
[1.03]
7.62
[0.3]
15.24
[0.6]
3.81
[0.15]
6-º1.5
2-º3.5
47.24
[1.86]
50.8
[2.0]
www.cosel.co.jp/en/
¶ Dimensions in mm, [
]=inches
¶ Div.:0.5inch
December 27, 2022
CQHS-7
CQHS-series
Pin Configuration
¿CQHS250
8
7
6
5
4
-VIN 3
RC 2
+VIN 1
-VOUT
-S
TRM
+S
+VOUT
*bottom view
No.
1
2
3
4
5
6
7
8
-
Pin Name
+VIN
RC
-VIN
+VOUT
+S
TRM
-S
-VOUT
Mounting hole
Function
+DC input
Remote ON/OFF
-DC input
+DC output
+Remote sensing
Adjustment of output voltage
-Remote sensing
-DC output
Mounting hole
¿CQHS300/CQHS350
2-Mounting hole
8
7
6
5
4
-VIN 3
RC 2
+VIN 1
-VOUT
-S
TRM
+S
+VOUT
*bottom view
Implementation・Mounting Method
Mounting method
¡When multiple power modules are used side by side, position them with sufficient spaces to allow adequate air ventilation so that the temperature of each power module will remain within the temperature range shown in the “Derating”.
¡Do not pass the DC input pattern underneath the power module as this will increase conducted noise. Place the DC input pattern away
from the power module.Do not pass the DC output pattern underneath the power module as this will increase output noise. Place the DC
output pattern away from the power module.
¡High frequency noise is radiated from the power module. When mounting the power module on a PCB, leave a copper pattern on the PCB
to let it act as a shield and connect this pattern to the mounting hole.
¡Avoid placing pattern layout in hatched area shown in right figure to insulate
between pattern and power supply.
5.0
48.5
+VOUT
+S
TRM
-S
-VOUT
+VIN
RC
-VIN
¿CQHS300/CQHS350
¡Soldering CQHS series with printed board must be done under the flat condition by using the mounting hole and fixing with the screw.
If CQHS series is inclined and it’s mounted, the insulation of the internal com-
Standard
Optional : -T
Mounting hole
M3 tapped
f3.4 thru
ponents and printed board might not be kept.
¡When a heat sink cannot be fixed on the base plate side, order the power
module with “-T” option. A heat sink can be mounted by affixing a M3 tap on
the heat sink.
Please make sure a mounting hole will be connected to a grounding capacitor
CY.
CQHS-8
December 27, 2022
www.cosel.co.jp/en/
CQHS-series
Implementation・Mounting Method
Stress onto the pins
¡Applying excessive stress to the input or output pins of the power module may damage internal connections. Avoid applying stressin excess of that shown in below.
¡Input and output pins are soldered onto the internal PCB. Do not bend or pull the leads with excessive force.
¿CQHS250
¿CQHS300/CQHS350
-VOUT
-S
TRM
+S
+VOUT
-VIN
RC
+VIN
+VOUT, -VOUT
Less than
19.6N(2kgf)
RC
+VIN
Others
Less than
19.6N
Less than
19.6N(2kgf)
Less than
19.6N
Less than
39.2N
Less than
39.2N(4kgf)
-VOUT
-S
TRM
+S
+VOUT
-VIN
+VOUT, -VOUT
Less than
19.6N(2kgf)
Less than
19.6N(2kgf)
Less than
39.2N(4kgf)
Others
Less than
9.8N(1kgf)
Less than
9.8N(1kgf)
Less than
19.6N(2kgf)
¿CQHS300/CQHS350
¡As unexpected stress may be applied to the pins, set the diameter of the PCB mounting hole at 3.5mm.
¡As unexpected stress may be applied to the pins from vibration or shock, fix the power module by using the mounting holes screws to reduce stress.
¡Fix the power module to the PCB with the screws before soldering the input and output pins to prevent the PCB pattern being damaged.
Soldering temperature
¡Flow soldering
: 260C for up to 15 seconds.
¡Soldering iron (26W)
: 450C for up to 5 seconds.
Derating
¡It is necessary to note the thermal fatigue life by power cycle.Please reduce the temperature fluctuation range as much as possible when
the up and down of the temperature are frequently generated. Contact us for more information on cooling methods.
¿CQHS250
¡Use with the convection cooling or the forced air cooling. Make sure the temperatures at temperature measurement locations shown below
are on or under the derating curve. Ambient temperature must be kept at 85℃ or under.
Load factor[%]
100
80
60
40
20
0
-40
-20
0
20
40
60
80
100
120
Temperature of measurement location
Temperature of measurement location[C]
¡For option “B” which is used with the convection cooling, forced air cooling or conduction cooling, use the temperature measurement location as shown in below.
www.cosel.co.jp/en/
December 27, 2022
CQHS-9
CQHS-series
Derating
1Vin=DC36-60V
CQHS2504850
Load factor[%]
100
80
CQHS2504832
60
40
Aluminum base plate
Vin : 36 - 60V
20
0
-40
-20
0
20
40
60 (75)80(85)
Aluminum base plate temperature Tc [ C ]
Tc : Measuring point
100
2Vin=DC60-76V
Load factor[%]
100
80
60
Vin : 60 - 76V
40
(25)
20
0
-40
-20
20
40
60(65) 80 (95)100
0
Aluminum base plate temperature Tc [ C ]
¿CQHS300/CQHS350
¡Use the power modules with conduction cooling (e.g. heat dissipation from the aluminum base plate to the attached heat sink).
Below figure shows the derating curves with respect to the aluminum base plate temperature. Note that operation within the hatched areas
will cause a significant level of ripple and ripple noise. Contact us for more information on cooling methods.
¡Please measure the temperature on the aluminum base plate edge side when you cannot measure the temperature of the center part of
the aluminum base plate. In this case, please take 5deg temperature margin from the derating characteristic of below figure .
2CQHS300 : Vin=DC60 - 76V CQHS350 : Vin=DC60 - 65V
100
100
80
80
Load factor [%]
Load factor [%]
1Vin=DC36-60V
Vin=DC36 - 60V
Vin=36-60V
50
0
-40
-20
0
20
40
60
CQHS300
: Vin=DC60 - 76V
Vin=60-76V
CQHS350 : Vin=DC60 - 65V
50
0
(85)
80
100
-40
Aluminum base plate temperature Tc [C]
-20
0
20
40
60
80
(95)
100
Aluminum base plate temperature Tc [C]
Tc : Measuring point
Aluminum base plate
Instruction Manual
◆ It is neccessary to read the “Instruction Manual” and “Before using our product” before you use our product.
Instruction Manual
https://www.cosel.co.jp/redirect/catalog/en/CQHS/
Before using our product
https://en.cosel.co.jp/technical/caution/index.html
CQHS-10
December 27, 2022
CQHS
NOTICE
www.cosel.co.jp/en/
CQHS-series
Basic Characteristics Data
Model
Circuit method
CQHS250 Full-bridge converter
Switching
frequency
[kHz]
Input
current
Rated
input fuse
Inrush
current
protection
Material
140
*1
-
-
glass fabric base, epoxy resin
*1
-
-
Aluminum
*1
-
-
Aluminum
CQHS300
Forward converter
250
CQHS350
Forward converter
250
Series/Redundancy
operation availability
PCB/Pattern
Single
sided
Double
sided
Series
operation
Redundancy
operation
Multilayer
Yes
*2
Yes
Yes
*2
Yes
Yes
*2
*1 R
efer to Specification.
efer to Instruction Manual.
*2 R
www.cosel.co.jp/en/
December 27, 2022
CQHS-11
工商网监
湘ICP备2023018690号
