NCP1031: Integrated DC-DC Converter for PoE and Telecom

The NCP1030 and NCP1031 are a family of miniature high-voltage monolithic dc-dc converters with on-chip power switch and start-up circuits. The NCP103x family incorporates in a single IC all the active power, control logic and protection circuitry required to implement, with minimal external components, several switching regulator applications, such as a secondary side bias supply or a low power dc-dc converter.This controller family is ideally suited for 48 V telecom, 42 V automotive, 12 V input and Power Over Ethernet (PoE) applications. The NCP103x can be configured in any single-ended topology such as forward or flyback. The NCP1030 is targeted for applications requiring up to 3 W, and the NCP1031 is targeted for applications requiring up to 6 W.The internal error amplifier allows the NCP103x family to be easily configured for secondary or primary side regulation operation in isolated and non-isolated configurations. The fixed frequency oscillator is optimized for operation up to 1 MHz and is capable of external frequency synchronization, providing additional design flexibility. In addition, the NCP103x incorporates individual line undervoltage and overvoltage detectors, cycle by cycle current limit and thermal shutdown to protect the controller under fault conditions. The preset current limit thresholds eliminate the need for external sensing components.

Features
  • On Chip High 200 V Power Switch Circuit and Startup Circuit
  • External Frequency Synchronization up to 1 MHz
  • Internal Startup Regulator with Auxiliary Winding Override
  • Trimmed 2% Internal Reference
  • Line Under/Over Voltage Lockout
  • Cycle by Cycle Current Limit
  • Over Temperature Protection
  • Internal Error Amplifier
  • Primary or Secondary Regulation
  • Excel Based Design Tool Available
Benefits
  • No external circuitry needed for high voltage start up
  • Optimization of switching frequency for size and efficiency
  • Smaller PCB footprint
  • Accurate output voltage
  • System level protection
  • System level protection
  • System level protection
  • Smaller PCB footprint
  • Flexibility in implementation
Applications
  • Stand Alone Low Power dc−dc Converter
  • Low Power Bias Supply
  • Low Power Boost Converter
End Products
  • POE (Power Over Ethernet)/PD. Refer to Application Note AND8247.
  • Secondary Side Bias Supply for Isolated dc-dc Converters
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP103x Design WorksheetNCP103X DWS.XLS (330.0kB)2
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Integrated DC-DC Converter for Power over Ethernet & Telecom DC-DCNCP1030/D (186kB)11Sep, 2014
Package Drawings (2)
Document TitleDocument ID/SizeRevision
8 PIN DFN, 4x4488AF (61.3kB)C
SOIC-8 Narrow Body751-07 (62.6kB)AK
Application Notes (2)
Document TitleDocument ID/SizeRevisionRevision Date
Application Note for a 5.0 W to 6.5 W Power Over Ethernet (PoE) DC-DC ConverterAND8247/D (151.0kB)2
Design of an Isolated 2 W Bias Supply for Telecom Systems Using the NCP1030AND8119/D (1581.0kB)0
Simulation Models (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1031 OrCAD TemplateNCP1031 ORCAD TEMPLATE (38.0kB)1
Evaluation Board Documents (5)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1031POEEVB Bill of MaterialsNCP1031POEEVB_BOM.PDF (143.0kB)1
NCP1031POEEVB Gerber Layout Files (Zip Format)NCP1031POEEVB_GERBERS.ZIP (66.0kB)0
NCP1031POEEVB ManualEVBUM2142/D (598.0kB)2
NCP1031POEEVB SchematicNCP1031POEEVB_SCHEMATIC.PDF (42.0kB)0
NCP1031POEEVB Test ProcedureNCP1031POEEVB_TEST_PROCEDURE.PDF (33.0kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1031POEEVBActive6.5 W PoE DC-DC Converter Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1031DR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.7
NCP1031MNTXGActivePb-free Halide freeDFN-8488AF1Tape and Reel4000$0.74
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP1031DR2GFlyback Step-Down Step-UpVoltage Mode820012185Up to 1000
NCP1031MNTXGStep-Up Step-Down FlybackVoltage Mode820012185Up to 1000
Integrated DC-DC Converter for Power over Ethernet & Telecom DC-DC (186kB) NCP1031
NCP103x Design Worksheet NCP1031
Application Note for a 5.0 W to 6.5 W Power Over Ethernet (PoE) DC-DC Converter NVD6416AN
Design of an Isolated 2 W Bias Supply for Telecom Systems Using the NCP1030 NCP1031
NCP1031 OrCAD Template NCP1031
NCP1031POEEVB BOM NCP1031POEEVB
NCP1031POEEVB GERBERS NCP1031POEEVB
EVBUM2142/D - 598 NCP1031POEEVB
NCP1031POEEVB SCHEMATIC NCP1031POEEVB
NCP1031POEEVB TEST PROCEDURE NCP1031POEEVB
SOIC-8 Narrow Body CM1216
8 PIN DFN, 4x4 NCP43080
NCP1031