PHV150-48-24
150W high-voltage isolated DC-DC converter with 36-75V input, 24V output, and 2250V isolation for industrial systems.
Product Overview
Description
The PHV150-48-24 from TDK-Lambda is a high-power 150W isolated DC-DC converter designed for demanding industrial and telecommunications applications. With a 36-75V input range optimized for 48V nominal systems, this converter delivers a regulated 24V output at up to 6.25A. The 2250V DC isolation provides reinforced safety isolation for industrial equipment. Featuring efficiency up to 93%, the PHV150-48-24 minimizes heat generation even at full load. The quarter-brick package with industry-standard pinout allows easy integration and thermal management through baseplate cooling. Advanced features include remote on/off control, output voltage trim, and comprehensive protection against overcurrent, overvoltage, and overtemperature conditions.
Product Series
PHV
Primary Application
Telecommunications infrastructure
Key Features
- 150W output power with 24V at 6.25A
- 36-75V input optimized for 48V systems
- 2250V DC reinforced isolation
- High efficiency 93%
- Quarter-brick industry standard package
- Baseplate cooling for high power density
- Remote on/off and output trim
- Comprehensive protection features
Specifications
| outputPower | 150W |
|---|---|
| inputVoltage | 36-75V DC |
| outputVoltage | 24V DC |
| outputCurrent | 6.25A |
| efficiency | 93% |
| isolation | 2250V DC |
| operatingTemperature | -40°C to +85°C |
| package | Quarter-brick |
| mtbf | 1,500,000 hours |
Applications
Telecommunications infrastructure
Communication and interface
Data center power distribution
Electronic system design
Industrial automation
Industrial automation and control
Power over Ethernet systems
Communication and interface
Battery backup systems
Battery and charging management
Distributed power architectures
Electronic system design
Railway and transportation
Electronic system design
Renewable energy systems
Renewable energy systems
FAE Expert Insights
"The PHV150-48-24 is an excellent choice for telecom and data center applications requiring high power from a 48V bus. The quarter-brick form factor is industry-standard, making it easy to integrate into existing designs or replace competitive products. The 93% efficiency is impressive for a 150W converter - I've measured actual efficiency above 92% at full load in my tests. The baseplate cooling is a key feature for high-density applications; with proper heatsinking, you can achieve full power at 85°C ambient. The 2250V isolation is sufficient for most industrial applications, though medical applications may require higher isolation. One thing to note is the input range starts at 36V, so it's not suitable for 24V systems. For 48V distributed power applications, this converter delivers excellent performance and reliability."
High-efficiency quarter-brick converter optimized for 48V telecom and data center applications
— James Thompson, BeiLuo
Frequently Asked Questions
What heatsinking is required for the PHV150-48-24?
The PHV150-48-24 requires baseplate cooling to achieve full 150W output at elevated temperatures. Without a heatsink, the converter can typically deliver 50-75W depending on ambient temperature and airflow. For full 150W operation: Natural convection requires a heatsink with thermal resistance of 2-3°C/W; Forced air cooling (200 LFM) allows a smaller heatsink with 4-5°C/W thermal resistance; The baseplate temperature should not exceed 100°C under any operating condition. When selecting a heatsink, consider the thermal interface material between the converter baseplate and heatsink - thermal pads or thermal grease improve heat transfer. The converter includes an internal temperature sensor that reduces output power if the baseplate exceeds safe limits. For high-reliability applications, design for a maximum baseplate temperature of 85°C to provide margin.
For full 150W output, provide adequate baseplate cooling with thermal resistance of 2-5°C/W depending on airflow conditions.
What is the output voltage adjustment range?
The PHV150-48-24 features an output voltage trim range of approximately ±10% of nominal (21.6V to 26.4V for the 24V model). The adjustment is made via a trim pin that can be connected to a resistor divider or potentiometer. To increase output voltage above nominal, connect a resistor from the trim pin to the -Sense pin; to decrease output voltage, connect a resistor from the trim pin to the +Sense pin. The trim circuit allows fine-tuning for: Compensating for voltage drop in long output cables; Matching output voltage to battery charging requirements; Adjusting for load-specific needs. Note that adjusting the output voltage affects the overvoltage protection threshold and may slightly impact efficiency. The trim range is sufficient for cable compensation and fine-tuning but not for wide-range voltage adjustment.
Use the output trim for fine-tuning or cable compensation within the ±10% range. For wider adjustment, consider programmable power supplies.
Can the PHV150-48-24 be synchronized to an external clock?
The PHV150-48-24 includes a sync pin that allows synchronization to an external clock frequency. This feature is useful for: Eliminating beat frequencies when multiple converters operate in the same system; Synchronizing to a system clock for EMI management; Parallel operation where phase interleaving reduces input ripple current. The sync input accepts a 5V logic-level clock signal at the converter's switching frequency (typically 200-300 kHz). When synchronized, the converter aligns its switching to the external clock. If the sync signal is lost, the converter automatically reverts to internal oscillator operation. The sync feature is optional - the converter operates normally without an external sync signal. For systems with multiple converters, synchronizing all units to a common clock can reduce EMI and input filter requirements.
Use the sync feature for multi-converter systems to reduce EMI and eliminate beat frequencies.
What is the input ripple current of the PHV150-48-24?
The PHV150-48-24 draws pulsating input current due to its switching operation, resulting in input ripple current. The RMS ripple current is typically 20-30% of the DC input current at full load. For example, at 150W output with 48V input and 93% efficiency, input current is approximately 3.35A DC, with RMS ripple current of 0.7-1.0A. This ripple current must be considered when: Selecting input capacitors - they must handle the ripple current without excessive heating; Designing input filters - the filter must attenuate switching noise; Sizing input wiring - conductors must handle the RMS current, not just average. TDK-Lambda recommends 100-470uF of low-ESR input capacitance close to the converter pins. Additional bulk capacitance may be needed depending on the impedance of the input power source and cable length.
Provide adequate input capacitance (100-470uF low-ESR) close to the converter to handle ripple current and ensure stable operation.
How does the remote sense feature work?
The PHV150-48-24 includes remote sense pins (+Sense and -Sense) that allow the converter to regulate voltage at the load rather than at the output terminals. This compensates for voltage drop in the output cables between the converter and load. To use remote sense: Connect the main output pins to the load through the power cables; Connect the sense pins directly to the load terminals using separate sense wires; The sense wires carry negligible current, so voltage drop is minimal. The converter will regulate output voltage to maintain the programmed voltage at the sense point. Remote sense can compensate for 0.5V or more of cable drop, depending on the converter model. If remote sense is not needed, simply connect the +Sense pin to +Vout and -Sense pin to -Vout locally at the converter. Never leave sense pins unconnected as this will cause improper operation.
Use remote sense for applications with long output cables or where precise voltage at the load is critical.