RCQ75 Series DC-DC Converter
xxx Series
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1
Notes
1. Input currents measured at nominal input voltage.
2. Input current is typically 2.5 mA at nominal input voltage when output is turned off using remote on/off.
3. Add suffix “-HK” for optional heatsink.
• Regulated Single Output
• 72 & 110 VDC for Rail Applications
• Baseplate-cooled
• 3000 VAC Isolation
• Operating Temperature -40 °C to +105 °C
• Remote On/Off & Remote Sense
• Complies with EN50155 and IEC60571
• Meets EMC Standard EN50121-3-2
• Optional Heatsink
• 3 Year Warranty
Dimensions:
RCQ75:
2.28 x 1.45 x 0.50” (57.9 x 36.8 x 12.7 mm)
75 Watts
Models & Ratings
Input voltage Output voltage Output current Input current(1,2) Overvoltage
Protection
Maximum
capacitive load Efficiency Model number(3)
No load Full load
43-101V
5 V 15.00 A 50 mA 1770 mA 6.2 V 25500 µF 89% RCQ7572S05
12 V 6.25 A 45 mA 1130 mA 15.0 V 4400 µF 92% RCQ7572S12
15 V 5.00 A 45 mA 1130 mA 18.0 V 2800 µF 92% RCQ7572S15
24 V 3.125 A 55 mA 1145 mA 30.0 V 1100 µF 91% RCQ7572S24
66-160V
5 V 15.00 A 40 mA 765 mA 6.2 V 25500 µF 89% RCQ75110S05
12 V 6.25 A 35 mA 750 mA 15.0 V 4400 µF 91% RCQ75110S12
15 V 5.00 A 35 mA 750 mA 18.0 V 2800 µF 91% RCQ75110S15
24 V 3.125 A 50 mA 760 mA 30.0 V 1100 µF 90% RCQ75110S24
2.00 (50.8)
2.28 (57.9)
0.60 (15.24)
0.60 (15.24)
1.03 (26.2)
1.45 (36.8)
0.16
(4.1) min
0.30 (7.62)
1.86 (47.2)
0.50 (12.5)
0.04 (1.00) DIA 6PLACES 0.06 (1.50) DIA 2PLACES
Mounting Inserts
M3x0.5 Through 4pl.
1
2
34
5
6
7
8
BOTTOM VIEW
Pin Connections
Pin Function
1 +Vin
2 Remote On/Off
3 -Vin
4 -Vout
5 -Sense*
6 Trim
7 +Sense*
8 +Vout
Mechanical Details
* If remote sense not used the +sense should be
connected to +output and –sense should be
connected to –output. Maximum output deviation
is 10% inclusive of trim.
RCQ75 Series
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DC-DC Converter
Input
Output
Characteristic Minimum Typical Maximum Units Notes & Conditions
Output Voltage 5 24 VDC See Models and Ratings table
Initial Set Accuracy ±1.0 % At full load
Output Trim ±10 % See Application Notes
Minimum Load A No minimum load required
Line Regulation ±0.2 % From minimum to maximum input at full load
Load Regulation ±0.3 % From 0 to full load
Cross Regulation ±5.0 % On dual output models when one load is varied between
25% and 100% and other is fixed at 100%
Transient Response 35% deviation Recovery within 1% in less than 250 µs for a 25% load
change.
Ripple & Noise 150/100 mV pk-pk 24 output / other models. 20 MHz bandwidth.
Measured using 1µF MLCC & 10µF tantalum capacitor.
Overload Protection 150 %
Short Circuit Protection Continuous Trip & Restart (Hiccup mode), with auto recovery
Maximum Capacitive Load See Models and Ratings table
Temperature Coefficient 0.02 %/ ˚C
Remote Sense Compensates up to 10% of Vout nominal plus output trim. If remote sense is not used, connect +S to +Vo and -S to -Vo.
Characteristic Minimum Typical Maximum Units Notes & Conditions
Input Voltage Range 43 101 VDC 72 V nominal
66 160 VDC 110 V nominal
Input Filter Internal Pi type
Input Surge 165 VDC for 100 ms 72 V models
250 110 V models
Remote On/Off ON: Logic high (3.5-12 V) or open circuit
OFF: Logic low (<1.2 V) or short pin 2 to pin 3
Undervoltage Lockout ON >43 V, OFF at <40 V 72 V models
ON >66 V, OFF at <63 V 110 V models
General
Characteristic Minimum Typical Maximum Units Notes & Conditions
Efficiency 91 % See Models and Ratings table
Isolation: Input to Output 3000 VAC 60 s
Isolation: Output to Case 1500 VDC
Isolation Resistance 109ΩAt 500 VDC
Isolation Capacitance 3000 pF
Switching Frequency 320 kHz
Power Density 45.3 W/in3
Mean Time Between Failure 140 kHrs MIL-HDBK-217F, +25 °C GB
Weight 0.13 (61.0) lb (g)
RCQ75 Series
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DC-DC Converter
3
Safety Approvals
Safety Agency Safety Standard Notes & Conditions
CB Report IEC60950-1 Information Technology
UL UL/cUL60950-1 Information Technology
Safety Agency Safety Standard Notes & Conditions
CB Report IEC60571 Railway Applications
EN EN50155 Railway Applications, Electronic Equipment used on Rolling Stock
Environmental
Characteristic Minimum Typical Maximum Units Notes & Conditions
Baseplate Temperature -40 +105 °C See Derating Curve.
Storage Temperature -50 +125 °C
Overtemperature Protection +110 °C
Humidity 95 %RH Non-condensing
Cooling IEC/EN 60068-2-1
Dry Heat IEC/EN 60068-2-2
Damp Heat IEC/EN 60068-2-30
Shock IEC/EN 61373
Vibration EN 45545-2
Thermal Impedance to Air 7.5/6.8 °C/W No heatsink / with heatsink
EMC: Immunity
Phenomenon Standard Test Level Criteria Notes & Conditions
IT Equipment EN55024 High severity, as below
Railway Equipment EN50121-3-2 Electomagnetic compatibility for rolling stock
apparatus
ESD EN61000-4-2 ±8 kV air discharge, ±6 kV contact A
Radiated EN61000-4-3 10 V/m A
EFT/Burst EN61000-4-4 ±2 kV A With external capacitor,
suggested part is CHEMI-CON KY 470µF/100V
Surge EN61000-4-5 ±1 kV A With external capacitor,
suggested part is CHEMI-CON KY 470µF/100V
Conducted EN61000-4-6 10 V rms A
EMC: Emissions
Phenomenon Standard Test Level Notes & Conditions
IT Equipment EN55022 A Conducted & Radiated, see Application Notes
Railway Equipment EN50121-3-2 Conducted & Radiated
RCQ75 Series
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DC-DC Converter
2.00 (50.8)
2.28 (57.9)
0.60 (15.24)
0.60 (15.24)
1.03 (26.2)
1.45 (36.8)
0.16
(4.1) min
0.30 (7.62)
1.86 (47.2)
0.50 (12.5)
0.04 (1.00) DIA 6PLACES 0.06 (1.50) DIA 2PLACES
Mounting Inserts
M3x0.5 Through 4pl.
1
2
34
5
6
7
8
BOTTOM VIEW
Thermal pad
Heat-sink
Converter
0.78 (20.0) Max
1. All dimensions are in inches (mm)
2. Weight: 0.13 lbs (61.0g) approx.
3. Tolerance: X.XX±0.01 (X.X±0.25)
X.XXX±0.005 (X.XX±0.13)
4. Pin Tolerance: ±0.002 (±0.05)
Notes
Pin Connections
Pin Function
1 +Vin
2 Remote On/Off
3 -Vin
4 -Vout
5 -Sense*
6 Trim
7 +Sense*
8 +Vout
Models - RCQ75 Max Ambient Temperature
No Heatsink (A) With Heatsink (B)
72S12, 72S15 56°C 61°C
110S12, 110S15 49°C 55°C
11S024 43°C 48°C
72S05, 110S05 36°C 42°C
Mechanical Details
Application Notes
-40
0
Ambient Temperature (°C)
100
Output Power (%)
105
With optional heatsink (-HK)
A B
Derating Curve with standard optional heatsink
Optional Heatsink (-HK)
* If remote sense not used the +sense should be
connected to +output and –sense should be
connected to –output. Maximum output deviation
is 10% inclusive of trim.
RCQ75 Series
www.xppower.com
DC-DC Converter
5
RCQ75
-Vin
L1
C1
C4
C6
+Vin
+Vout
C3
C5
TRIM DOWN
TRIM UP
+SENSE
-SENSE
TRIM
+SENSE
-SENSE
TRIM 10 kOhms
TRIMPOT
Application Notes
Class C1 C3 C4 C5 C6 L1
Class A CHEMI-CON KXG Series
68µF/200V 2200pF/3kV 2200pF/3kV 2200pF/3kV 2200pF/3kV 450µH
Models 1% 2% 3% 4% 5% 6% 7% 8% 9% 10%
Voutx0.99 Voutx0.98 Voutx0.97 Voutx0.96 Voutx0.95 Voutx0.94 Voutx0.93 Voutx0.92 Voutx0.91 Voutx0.90
5V 138.88 k 62.41 k 36.92 k 24.18 k 16.53 k 11.44 k 7.79 k 5.06 k 2.94 k 1.24 k
12V 413.55 k 184.55 k 108.22 k 70.05 k 47.15 k 31.88 k 20.98 k 12.80 k 6.44 k 1.35 k
15V 530.73 k 238.61 k 141.24 k 92.56 k 63.35 k 43.87 k 29.96 k 19.53 k 11.41 k 4.92 k
24V 598.66 k 267.78 k 157.49 k 102.34 k 69.25 k 47.19 k 31.44 k 19.62 k 10.43 k 3.08 k
External Output Trimming
EMI Filter for Conducted Emissions
Trim Down Resistor Values (Rd)
Models 1% 2% 3% 4% 5% 6% 7% 8% 9% 10%
Voutx1.01 Voutx1.02 Voutx1.03 Voutx1.04 Voutx1.05 Voutx1.06 Voutx1.07 Voutx1.08 Voutx1.09 Voutx1.10
5V 106.87 k 47.76 k 28.06 k 18.21 k 12.30 k 8.36 k 5.55 k 3.44 k 1.79 k 0.48 k
12V 351.00 k 157.50 k 93.00 k 60.75 k 41.40 k 28.50 k 19.29 k 12.37 k 7.00 k 2.70 k
15V 422.77 k 189.89 k 112.26 k 73.44 k 50.15 k 34.63 k 23.54 k 15.22 k 8.75 k 3.58 k
24V 487.14 k 218.02 k 128.31 k 83.46 k 56.55 k 38.61 k 25.79 k 16.18 k 8.70 k 2.72 k
Trim Down Resistor Values (Ru)
15 Feb 16
