A power delivery system is subject to many electric hazards. Along the electrical path, inrush currents due to storage capacitors, reverse currents due to wiring errors or power outages, overvoltages and undervoltages can induce degradation or irreversible damage. There are numerous shortcomings of typical non-integrated protection solutions, including high BOMs and cost, large PCB real estate, high tolerance, and time-consuming qualification. Maxim's highly integrated family of protection ICs with protection features up to 6A and up to ±60V free you from these concerns. And this leaves you time to do what you do best: focus on adding value through your domain knowledge and system design!

Another challenge designers face is to isolate their power supply while still fitting into a small space and perform with high efficiency. Our Rainier portfolio of isolated DC-DC and AC-DC converters and controllers deliver smaller solution sizes with smaller BOMs. Our patented technology eliminates the optocoupler from the feedback path, saving 30% of the typical board space required and up to 50% off the BOM. Check out our No-Opto isolated DC-DC devices.

Complete system power protection

System power protection ICs prevent field failures and unexpected downtime by mitigating the harmful effects of reverse voltage, hot swap, overvoltage, overcurrent, and overtemperature fault conditions frequently encountered in industrial, medical, e-mobility and other environments.

Our complete system protection ICs integrate back-to-back MOSFETs for robust protection with nanosecond response times. Our robust, compact solutions feature:

  • Inrush current limit (Put in bullet format)
  • e-Fuse/overload limit
  • Reverse voltage
  • Power limit
  • Thermally controlled current foldback
  • Current monitoring

Featured products

MAX17525EVKIT

The MAX17525 evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the MAX17525 overvoltage, undervoltage, and overcurrent protection device. The EV kit features an external pMOSFET and LED input and output reading.

Key features

  • 5.5v to 60v operating voltage range
  • External pmosfet installed
  • Proven pcb layout
  • Fully assembled and tested

Applications

  • Control and automation
  • High power applications
  • Human machine interfaces
  • Industrial power systems
  • Motion system drives
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Additional parts

MAX17526A

MAX17612CEVKIT

The MAX17612C evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the MAX17612C 4.5V to 60V, 250mA, current-limiter with reverse protection in a 10-pin TDFN-EP package. The EV kit can be configured to demonstrate different current-limit types, and different current-limit thresholds.

Key features

  • 4.5v to 60v operating voltage range
  • Features a tvs diode across the input and schottky diode across the output terminals
  • Evaluates three current-limit types, and current- limit threshold
  • Internal UVLO set to 4.2V
  • Jumper configurable current-limit (selected as 250ma by default)
  • Current limit mode set to autoretry by default
  • Proven PCB layout
  • Fully assembled and tested

Applications

  • Condition monitoring
  • Factory sensors
  • Industrial applications such as plc, network-control modules, battery-operated modules
  • Process instrumentation
  • Sensor systems
  • Weighing and batching systems
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Additional parts

MAX17612AMAX17612B

Current limiter with ov, uv, and reverse protection

1A Maximum current limit

MAX17523 - 4.5V to 36V, 16-TQFN, 3mm x 3mm

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MAX17608 - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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MAX17609 - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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MAX17610 - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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2A Maximum current limit

MAX14721 - 4.5V to 36V, 16-TQFN, 3mm x 3mm

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MAX14722 - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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MAX14723 - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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3A Maximum current limit

MAX17613A - 4.5V to 36V, 16-TQFN, 3mm x 3mm

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MAX17613B - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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MAX17613C - 4.5V to 60V, 12-TDFN-EP / 3mm x 3mm

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4.2A Maximum current limit

MAX17561 - 4.5V to 36V, 14-TSSOP / 5mm x 6.5mm

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MAX17562 - 4.5V to 36V, 14-TSSOP / 5mm x 6.5mm

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MAX17563 - 4.5V to 36V, 14-TSSOP / 5mm x 6.5mm

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Resources

No-Opto isolated DC-DC

Isolated power supplies transfer power from one circuit to another without a direct connection between the two circuits. Power isolation protects electronic loads and equipment operators from exposure to high voltages. Power isolation also prevents ground loops, which produce parasitic currents that can disrupt the output voltage regulation and can introduce galvanic corrosion of the conducting traces.

In addition to protection, Maxim's patented technology eliminates the optocoupler from the feedback path, saving 30% of the typical board space required and up to 50% off the BOM.

Isolated power supplies are routinely utilized in industrial, consumer, and telecom applications concerned with the protection of sensitive loads and the long-term reliability of the equipment.

Featured products

MAX17691BEVKIT

The MAX17691B evaluation kit (EV kit) provides a proven design to evaluate the performance of the MAX17691B IC. This fully assembled and tested circuit evaluates the MAX17691B, the No-Opto Flyback Converter with an integrated 76V nMOSFET, available in a 12-pin TDFN package with an exposed pad. The IC data sheet provides a complete description of the part and should be read in conjunction with this EV kit data sheet prior to operating the EV kit.

Key features

  • 18v to 36v input range
  • Isolated output: 5v/1.5a dc
  • Compact design with high frequency (150khz) switching
  • $87% peak efficiency
  • Resistor programmable input enable/uvlo protection
  • External loop compensation with design flexibility
  • 5ms internal soft-start time
  • Temperature compensated output voltage over -40°c to +125°c operating temperature
  • Provision to external clock synchronization and frequency dithering
  • VCC overdrive to improve efficiency
  • Minimum number of external components
  • Complies with CISPR22(EN55022) Class B radiated emissions
  • Proven PCB layout
  • Fully assembled and tested

Applications

  • IGBT Gate drive supplies
  • Industrial and telecom applications
  • Isolated power supplies
  • PLC I/O Modules
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Additional parts (4.5V to 60V)

SpecificationsMAX17686MAX17687MAX17690
Input voltage range4.5V to 60V4.5V to 60V4.5V to 60V
Built in FETYesYesNo
Switching frequency200kHz100kHz to 500kHz50kHz to 250kHz
TopologyIso buck (5W)Iso buck (10W)No-Opto Flyback
(no Opto)(no Opto)
Vout accuracy+/-8%+/-8%+/-5%
PGOODYesYesNo
Frequency ditherNoNoNo
SyncNoYesNo
Current senseInternalInternalExternal current sense resistor
Soft startAdjustableAdjustableAdjustable
Over current protectionCycle by cycle/HiccupCycle by cycle/HiccupHiccup
Package10 Ld. 2 x 3 TDFN20 Ld. 4 x 4 TQFN16 Ld. 3 x 3 TQFN
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MAX17682EVKIT

The MAX17682EVKIT is a fully assembled and tested circuit board that demonstrates the performance of the MAX17682 high-efficiency, iso-buck DC-DC Converter. The EV kit operates over a wide input-voltage range of 16V to 42V and uses primary-side feedback to regulate the output voltage. The EV kit has isolated output, programmed to +12V at 750mA, with 10% output voltage regulation.

Key features

  • 16v to 42v input voltage range
  • +12V, 750mA continuous Current
  • EN/UVLO input
  • 200kHz switching frequency
  • 91% peak efficiency
  • Overcurrent protection
  • No optocoupler
  • Delivers up to 10W output power
  • Overtemperature protection
  • Proven PCB layout

Applications

  • Floating power supply generation
  • Industrial process control
  • Isolated power supplies in medical equipment
  • The EV kit comes installed with the MAX17682 in a 20-pin (4mm x 4mm) TDFN package
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Additional parts (4.5V to 42V)

SpecificationsMAX17681
Input voltage range4.5V to 42V
Built in FETYes
Switching frequency200kHz
TopologyIso buck (5W)
(no Opto)
Vout accuracy+/-8%
PGOODYes
Frequency ditherNo
SyncNo
Current senseInternal
Soft startAdjustable
Over current protectionCycle by cycle/Hiccup
Package10 Ld. 2 x 3 TDFN
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Resources

MAX17690EVKITA

The MAX17690A evaluation kit (EV kit) is a fully assembled and tested circuit board that demonstrates the operation of an isolated 5W no-opto flyback DC/DC converter with secondary-side synchronous rectification. This circuit is implemented using the MAX17690, a no-opto, flyback controller in a 16-pin TQFN package with an exposed pad. The synchronous rectification on the secondary side is enabled by replacing the secondary diode with a MOSFET to achieve 89.5% efficiency. The circuit uses the MAX17606, a secondary-side synchronous rectifier driver in a 6-pin SOT23 package for driving the secondary-side MOSFET.

Key features

  • 18V to 36V Input range
  • Isolated output: 5v/1a dc
  • Compact design with high frequency (150khz) switching
  • No optocoupler/third winding required to derive feedback signal
  • 90% peak efficiency
  • Galvanic isolation up to 1875vrms
  • Proven PCB layout
  • Fully assembled and tested
  • Minimum load for ±5% regulation: 1% of full-load

Applications

  • Industrial and telecom applications
  • Isolated flyback converters
  • PLC I/O Modules
  • Wide range dc input isolated power supplies
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