Products Description
The 1/32 Brick Isolated Power Converter redefines miniaturization with its industry-smallest 26.19×21.7×12.7mm footprint, delivering 50W output at 91% peak efficiency. Engineered for space-critical applications, this DC-DC converter features 1500Vdc reinforced isolation and integrated protection circuits, making it the optimal solution for portable medical devices, IoT edge nodes, and drone avionics where every cubic millimeter counts.
World Record: 50W in 7.2cm³ volume • 16-40V wide input • -55°C to 105°C operation • 20g ultralight design
Products Specification
|
Model number |
Input Range Vdc |
Output Voltage Vdc |
Output Current @Full Load A |
Efficiency % |
Ripple and noise mV p-p |
Maximum Capacitor Load uF |
|
LM28S3R3D30-NNMG |
16-40 |
3.3 |
9.1 |
86 |
30 |
5000 |
|
LM28S5D50-NNMG |
16-40 |
5.0 |
10 |
88 |
50 |
5000 |
|
LM28S12D50-NNMG |
16-40 |
12 |
4.2 |
88 |
50 |
3000 |
|
LM28S28D50-NNMG |
16-40 |
28 |
1.8 |
89 |
100 |
2200 |
|
LM28S48D50-NNMG |
16-40 |
48 |
1.1 |
88 |
100 |
1000 |
|
Parameter |
Min |
Typical |
Max |
Unit |
Conditions |
|
Input voltage range |
16 |
28 |
40 |
Vdc |
All models |
|
Isolation voltage |
- |
- |
1500 |
Vdc |
Input-output/case |
|
Switching frequency |
- |
360 |
- |
kHz |
Nominal input |
|
Operating temperature |
-55 |
- |
105 |
°C |
H.Ex. external temperature |
|
MTBF |
2 |
- |
- |
Mhrs |
MIL-HDBK-217F |
|
Weight |
- |
20 |
- |
g |
- |
Design Details
Mechanical Dimensions:26.19(L) × 21.7(W) × 12.7(H) mm (industry-standard 1/32-brick)
Pin Configuration:
|
Pin |
Designation |
Function |
|
1 |
Vin+ |
Positive input voltage |
|
2 |
ON/OFF |
Remote control terminal |
|
3 |
Vin- |
Negative input voltage |
|
4 |
Vout- |
Negative output voltage |
|
5 |
Sense- |
Remote voltage sensing negative |
|
6 |
Trim |
Output voltage adjustment |
|
7 |
Sense+ |
Remote voltage sensing positive |
|
8 |
Vout+ |
Positive output voltage |
Thermal Innovation: Aluminum alloy baseplate with 10°C/W thermal resistance (natural convection)
Mounting: Standard through-hole soldering with 1.5mm pin diameter
Products feature
Ultra-Compact Design – Delivers 50W output power in a space-saving 1/32-brick package (26.19×21.7×12.7mm), ideal for high-density systems.
Advanced Protection Features – Built-in input undervoltage lockout (13.0V cutoff) and automatic short-circuit recovery ensure reliable performance.
High-Precision Regulation – Maintains ±1% output voltage stability across a wide operating range from -55°C to +105°C.
Flexible Control Interface – ON/OFF pin compatible with 3.5V to 25V logic signals for seamless integration.
Remote Sensing Capability – Sense+/- pins provide accurate ±2% load regulation even at distances up to 1 meter.
Enhanced Thermal Reliability – Designed to operate up to 105°C baseplate temperature with derating for demanding environments.
Advantages
High Safety Assurance – Successfully passed 1500Vdc isolation test in compliance with IEC 62368-1.
Exceptional Power Efficiency – Achieves up to 91% conversion efficiency at 28V/1.8A output.
Automotive-Grade Reliability – Fully compliant with ISO 7637-2 transient standards, ensuring stable operation in harsh automotive environments.
Proven Environmental Durability – Withstands 500 hours of continuous operation at 95% relative humidity and 60°C.
Superior Thermal Endurance – Qualified through 500 thermal cycles ranging from -55°C to +125°C.
Outstanding Mechanical Robustness – Maintains only 0.1% output deviation under extreme 50g vibration tests (SGS certified).
Products application
service
Rapid Customization
48hr turnaround for special voltages
Free Thermal Modeling
CFD simulations for compact designs
3-Year Warranty
Extended coverage for industrial use
Proto Kits
Include evaluation board + GUI software
EMC Consulting
Pre-compliance testing services
Lifecycle Guarantee
10-year continuous supply
FAQ
Q: How does size compare to 1/16 brick isolated power converter?
A: 50% smaller footprint while delivering 50% power density increase.
Q: What is the turn-on delay with ON/OFF control?
A: 15ms typical at 25°C when pin 2 >3.5V.
Q: Can Sense pins be left unconnected?
A: Yes, internal sensing activates when pins are open.
Q: How to achieve ±10% output adjustment?
A: Connect 20kΩ resistor between Trim (pin6) and Sense- (pin5).
Q: What automotive transients can it withstand?
A: Complies with ISO 7637-2 pulses 1,2,3a/3b up to 40V.
Q: Is baseplate electrically isolated?
A: Yes, 1500Vdc isolation between case and circuits.
Q: What's the minimum load requirement?
A: 5% load for all models except 3.3V versions (require 10%).
Q: Can it operate without heatsink?
A: Yes, up to 50°C ambient at full load with natural convection.
Q: Are radiation-hardened versions available?
A: Yes, RHA Level III versions for aerospace applications.
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