JSM25 Series DC-DC Converter
xxx Series
www.xppower.com
1
Notes
1. Input currents measured at nominal input voltage.
2. Input current is typically 3 mA at nominal input voltage when output is turned
off with remote on/off.
3. Maximum capacitive load is per output.
4. Add suffix “-HK” for optional heatsink.
• Regulated Single & Dual Output
• 2:1 Input Range
• 1” x 1” Package
• 1500 VDC Isolation
• Operating Temperature -40 °C to +105 °C
• ITE Safety Approvals
• Remote On/Off
• High Power Density
• Optional Heatsink
• Six-sided Metal Case
• 3 Year Warranty
Dimensions:
JSM25:
1.00 x 1.00 x 0.40” (25.4 x 25.4 x 10.16 mm)
25 Watts
Models & Ratings
Input voltage Output voltage Output current Input current(1,2) Overvoltage
Protection
Maximum
capacitive load(3) Efficiency Model number(4)
No load Full load
9-18V
3V3 6.00 A 75 mA 1.90 A 3.9 V 10300 µF 87% JSM2512S3V3
5 V 5.00 A 85 mA 2.34 A 6.2 V 6800 µF 89% JSM2512S05
12 V 2.09 A 80 mA 2.35 A 15.0 V 1200 µF 89% JSM2512S12
15 V 1.67 A 80 mA 2.35 A 18.0 V 750 µF 89% JSM2512S15
±12 V ±1.04 A 75 mA 2.34 A ±15.0 V ±680 µF 89% JSM2512D12
±15 V ±0.84 A 75 mA 2.36 A ±18.0 V ±380 µF 89% JSM2512D15
18-36V
3V3 6.00 A 55 mA 0.94 A 3.9 V 10300 µF 88% JSM2524S3V3
5 V 5.00 A 69 mA 1.16 A 6.2 V 6800 µF 90% JSM2524S05
12 V 2.09 A 55 mA 1.16 A 15.0 V 1200 µF 90% JSM2524S12
15 V 1.67 A 55 mA 1.16 A 18.0 V 750 µF 90% JSM2524S15
±12 V ±1.04 A 50 mA 1.17 A ±15.0 V ±680 µF 89% JSM2524D12
±15 V ±0.84 A 50 mA 1.18 A ±18.0 V ±380 µF 89% JSM2524D15
36-75V
3V3 6.00 A 35 mA 0.47 A 3.9 V 10300 µF 88% JSM2548S3V3
5 V 5.00 A 40 mA 0.58 A 6.2 V 6800 µF 90% JSM2548S05
12 V 2.09 A 35 mA 0.58 A 15.0 V 1200 µF 90% JSM2548S12
15 V 1.67 A 35 mA 0.58 A 18.0 V 750 µF 90% JSM2548S15
±12 V ±1.04 A 40 mA 0.59 A ±15.0 V ±680 µF 89% JSM2548D12
±15 V ±0.84 A 40 mA 0.59 A ±18.0 V ±380 µF 89% JSM2548D15
1.00 (25.4)
0.80 (20.3)
1.00 (25.4)
0.40 (10.16) 0.40 (10.16) 0.10
(2.54)
ø 0.04
(1.00)
0.24
(6.0)
0.40 ±0.02
(10.16 ±0.5)
0.10
(2.54)
0.20
(5.08)
0.30
(7.62)
126
345
Bottom View 0.69 (17.46) Max.
1.22 (31.0) Max.
0.64 (16.3) Max.
Heat-Sink
Thermal Pad
Clamp
Converter
0.77 (19.50) Max.
1. All dimensions are in inches (mm)
2. Weight: 0.04 lbs (16.5g) 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 Single Dual
1 +Vin +Vin
2 -Vin -Vin
3 +Vout +Vout
4 Trim Common
5 -Vout -Vout
6 Remote On/Off Remote On/Off
Mechanical Details
Optional Heatsink (-HK)
JSM25 Series
www.xppower.com 2
DC-DC Converter
Input
Output
Characteristic Minimum Typical Maximum Units Notes & Conditions
Output Voltage 3.3 30 VDC See Models and Ratings table
Initial Set Accuracy ±1.0 % At full load
Output Trim ±10 % See Application Notes
Output Voltage Balance ±2.0 % For dual output with balanced laods
Minimum Load A No minimum load required
Line Regulation ±0.2 ±0.8 % From minimum to maximum input at full load
Load Regulation ±0.2/±1.0 % Single / Dual output, 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 300 µs for a 25% load
change.
Ripple & Noise 100/150 mV pk-pk 3.3 & 5V output / other models. 20 MHz bandwidth.
Measured using 0.47 µF ceramic 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
Characteristic Minimum Typical Maximum Units Notes & Conditions
Input Voltage Range
9.0 18 VDC 12 V nominal
18.0 36 VDC 24 V nominal
36.0 75 VDC 48 V nominal
Input Filter Internal Pi type
Input Surge
25
VDC for 1 s
12 V models
50 24 V models
100 48 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 6
General
Characteristic Minimum Typical Maximum Units Notes & Conditions
Efficiency 89 % See Models and Ratings table
Isolation: Input to Output 1500/1800 VDC 60 s/1 s
Isolation Resistance 109ΩAt 500 VDC
Isolation Capacitance 2000 pF
Switching Frequency 285 kHz
Power Density 62.5 W/in3
Mean Time Between Failure 310 kHrs MIL-HDBK-217F, +25 °C GB
Weight 0.04 (16.5) lb (g)
Environmental
Characteristic Minimum Typical Maximum Units Notes & Conditions
Operating Temperature -40 +105 °C See Derating Curve.
Storage Temperature -50 +125 °C
Case Temperature +105 °C
Humidity 95 %RH Non-condensing
Cooling Natural convection
Thermal Impedance to Air 17.6/14.8 °C/W No heatsink / with heatsink
EMC: Emissions
Phenomenon Standard Test Level Notes & Conditions
Conducted EN55022 Class A/B See Application Notes
JSM25 Series
www.xppower.com
DC-DC Converter
3
1.00 (25.4)
0.80 (20.3)
1.00 (25.4)
0.40 (10.16) 0.40 (10.16) 0.10
(2.54)
ø 0.04
(1.00)
0.24
(6.0)
0.40 ±0.02
(10.16 ±0.5)
0.10
(2.54)
0.20
(5.08)
0.30
(7.62)
126
345
Bottom View 0.69 (17.46) Max.
1.22 (31.0) Max.
0.64 (16.3) Max.
Heat-Sink
Thermal Pad
Clamp
Converter
0.77 (19.50) Max.
1. All dimensions are in inches (mm)
2. Weight: 0.04 lbs (16.5g) 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 Single Dual
1 +Vin +Vin
2 -Vin -Vin
3 +Vout +Vout
4 Trim Common
5 -Vout -Vout
6 Remote On/Off Remote On/Off
Models - JSM25 Max Ambient Temperature
No Heatsink (A) With Heatsink (B)
24S3V3, 48S3V3 57°C 65°C
24S05, 24S12, 24S15, 48S05, 48S12, 48S15 56°C 64°C
12S3V3 53°C 61°C
12S05, 12S12, 12S15, 12D12, 12D15,
24D12, 24D15, 48D12, 48D15 50°C 59°C
Mechanical Details
Application Notes
-40
0
Ambient Temperature (°C)
100
Output Power (%)
105
With optional heatsink (-HK)
A B
Derating Curve
EMC: Immunity
Phenomenon Standard Test Level Criteria Notes & Conditions
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 220µF/100V
Surge EN61000-4-5 ±1 kV A With external capacitor,
suggested part is CHEMI-CON KY 220µF/100V
Conducted EN61000-4-6 10 V rms A
Optional Heatsink (-HK)
Safety Approvals
Safety Agency Safety Standard Notes & Conditions
CB Report IEC60950-1 Information Technology
UL UL/cUL60950-1 Information Technology
JSM25
-Vin
L1
C1 C2 C3
C5
C4
+Vin
12 6
345
JSM25 JSM25
Bottom View
Trim Up
126
345
Bottom View
Rd
Trim Down
Ru
JSM25 Series
www.xppower.com 30
DC-DC Converter
Application Notes
Class Model C1 C2 C3 C4 & C5 L1
Class A
12V
None
3.3µF/25V 1210 MLCC
None None
1µH
24V 3.3µF/50V 1210 MLCC 2.2µH
48V 3.3µF/100V 1210 MLCC 4.7µH
Class B
12V 3.3µF/25V 1210 MLCC 3.3µF/25V 1210 MLCC 3.3µF/25V 1210 MLCC 1800 pF/2kV 1206 MLCC 1µH
24V 3.3µF/50V 1210 MLCC 3.3µF/50V 1210 MLCC 3.3µF/50V 1210 MLCC 1800 pF/2kV 1206 MLCC 2.2µH
48V 3.3µF/100V 1210 MLCC 3.3µF/100V 1210 MLCC 3.3µF/100V 1210 MLCC 1800 pF/2kV 1206 MLCC 4.7µH
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
3V3 72.61 k 32.55 k 19.20 k 12.52 k 8.51 k 5.84 k 3.94 k 2.51 k 1.39 k 0.50 k
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
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
3V3 60.84 k 27.40 k 16.25 k 10.68 k 7.34 k 5.11 k 3.51 k 2.32 k 1.39 k 0.65 k
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
Trim Up Resistor Values (Ru)
