Isolated power, 36-V, H-bridge transformer driver enables simple and flexible isolated DC-DC designs
Users can choose their own transformer winding ratio which defines the output voltage, thus allowing the selection of virtually any isolated output voltage. This robust supply range eliminates external voltage regulation. Integrated protection features prevent system-level failures. By eliminating 16 discrete components, the MAX13256 simplifies BOM complexity and reduces footprint with high integration in a tiny TDFN package. With all these capabilities, the MAX13256 driver is a simple way to create isolated power supplies in smart grid metering applications, and industrial and medical equipment.
Smart grid applications utilizing wired interface communications require isolated power to protect against high-voltage mains that can damage both the installer and power meter’s internal electronics. The isolated power is typically generated with a transformer and discrete components which increase the solution size and add cost. The MAX13256 drives the transformer that acts as the additional form of isolation from high-voltage mains.
A smart grid has different requirements for input voltage and output power that vary based on the type of interface used to communicate with the smart meter. The MAX13256’s wide 8 V to 36 V input voltage range addresses these diverse power-supply input requirements. The device also eliminates external voltage regulation, and enables flexible transformer options to satisfy a wide range of power output requirements.
The MAX13256 also integrates protection features that prevent system-level failures. Adjustable current limiting allows indirect limiting of secondary-side load currents. An overcurrent limit is set by an external resistor over the 215 mA to 650 mA (typ) range. An active-low FAULT output asserts when the device detects an overtemperature or overcurrent condition. This integrated thermal and short-circuit protection ensures safe operation and reduces both cost and PCB space over discrete solutions.
Highly integrated H-bridge and transformer modules are typically more expensive solutions that are limited to providing customers with system optimized isolated output voltages. For applications requiring a simple low-cost approach for non-regulated DC-DC isolation, the MAX13256 is an ideal fit.
The high efficiency of the MAX13256 (up to 90%) helps reduce heat in applications where space is premium. In addition, the device features a low-power mode to reduce the overall supply current to 0.65 mA (typ) when the driver is not in use.
Availability and Pricing
The MAX13256 is available in a 10-pin TDFN and is specified over the -40 to +125 degrees Celsius automotive temperature range. Pricing starts at $2.85 (1000-up).
An evaluation (EV) kit is also available.
More information at www.maxim-ic.com/smartergrid
- Imec and Renesas collaborate on ultra-low power short range radios
- PIN power diodes combine low recovery losses and softness for efficiency and low EMI
- sureCore receives £250 000 SMART Award to prototype low power SRAM technology
- Miniature 30-V MOSFETs claim industry-leading RDS(ON) performance
- Highest power GaN in Plastic transistors target radar and communications systems
- Amantys partners Fuji Electric to launch IGBT gate drivers for wind and solar markets
- Ultra-low noise, high PSRR linear voltage regulators reduce jitter, simplify power design
- 2-kVA frequency converter delivers clean sine-wave output from generator voltage
- Altera acquires power technology innovator Enpirion
- Non-contact current probes target advanced power designs
- KTH The Royal Institute of Technology develops world's first water-activated charging device for mobile phones
- Volvo evaluates flywheel hybrid drive - fuel savings of up to 25%
- PV storage market is set to grow to USD19bn by 2017
- Energy harvesting wireless switch transmits on-off data over a 300m range at 868MHz
- Accutronics offers new custom battery service
- Nordic Semiconductor releases world's smallest Bluetooth low energy and ANT+ ICs
- Power-One enters into patent license agreement with Microchip
- Quad-MOSFET solution boosts efficiency and eliminates heat sinking in active bridge applications
- Advanced microcontroller combines floating point and low leakage technology to achieve longest battery lifetime in portable applications
- Best-in-class MOSFET solution focuses on Power over Ethernet applications
- High Voltage Surge Stoppers Ensure Reliable Operation During Power Surges
- Motor-Drive Design made Simple
- Adaptive Cell Converter Topology Enables Constant Efficiency in PFC Applications
- Micropower Isolated Flyback Converter with Input Voltage Range from 6V to 100V
- Derating of Schottky Diodes
- Heatsink Optimization
- High Performance ZVS Buck Regulator Removes Barriers To Increased Power Throughput
- Waste heat replaces batteries
- Stepper Motor Control IC
- 50Ω Gain Block IF Amplifier