NCP3065: Buck / Boost / Inverting Regulator, Switching, Constant Current, 1.5 A, for HB-LEDs

The NCP3065 is a monolithic Buck Boost Inverting Switching Regulator designed to deliver constant current for powering high brightness LEDs (HBLED). The device has a very low feedback voltage of 235 mV (nominal) which is used to regulate the average current of the LED string. In addition, the NCP3065 has a wide input voltage up to 40 V to allow it to operate from 12 Vac or 12 Vdc supplies commonly used for lighting applications as well as unregulated supplies such as Lead Acid batteries. The device can be configured in a controller topology with the addition of an external transistor to support higher LED currents beyond the 1.5 A rated switch current of the internal transistor. The NCP3065 switching regulator can be configured in Step-Down (Buck), Step-Up (boost) or SEPIC topologies with a minimum number of external components. Available with ENABLE feature under part number NCP3066.

Features
  • Integrated 1.5 A Switch
  • Input Voltage Range from 3 V to 40 V
  • Low Feedback Voltage of 235 mV
  • Cycle-by-Cycle Current Limit
  • No Control Loop Compensation Required
  • Frequency of Operation Adjustable up to 250 kHz
  • Operation With All Ceramic Output Capacitors or No Output Capacitance
  • Analog and Digital PWM Dimming Capability
  • Internal Thermal Shutdown with Hysteresis
Benefits
  • Integrated switch provides for small footprint
  • Flexibility to operate from 12Vac or 12Vdc supplies commonly used for lighting applications
  • Allows the use of small / low cost sense resistor
  • Enhanced protection features
  • Easy design-in
  • Optimization of efficiency and size
  • Reduce size and cost by eliminating output capacitor
  • Flexibiliy in application to select method of dimming
  • Enhanced protection features
Applications
  • Constant Current Source
  • High Power LED Driver
  • High Brightness LED (HB-LED)
End Products
  • Automotive and Marine Lighting (LED)
  • Low Voltage LED Landscape Lighting
  • MR-16 Replacement
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP3065 Design WorksheetNCP3065 DWS.XLS (134.0kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDsNCP3065 (278.0kB)3
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDs with EnableNCP3066/D (1139.0kB)3
Package Drawings (3)
Document TitleDocument ID/SizeRevision
8 LEAD PDIP626-05 (35.0kB)P
8 PIN DFN, 4x4488AF (61.3kB)C
SOIC-8 Narrow Body751-07 (62.6kB)AK
Application Notes (1)
Document TitleDocument ID/SizeRevisionRevision Date
High Intensity LED Drivers Using NCP3065/NCV3065AND8298/D (1204.0kB)1
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP3065DR2GActivePb-free Halide freeSOIC-8751-071Tape and Reel2500$0.45
NCP3065MNTXGActivePb-free Halide freeDFN-8488AF1Tape and Reel4000$0.47
NCP3065PGLast ShipmentsPb-free Halide freePDIP-8626-05NATube50
NCV3065DR2GActiveAEC Qualified PPAP Capable Pb-free Halide freeSOIC-8751-071Tape and Reel2500$0.48
NCV3065MNTXGActiveAEC Qualified PPAP Capable Pb-free Halide freeDFN-8488AF1Tape and Reel4000$0.5
NCV3065PGLast ShipmentsAEC Qualified PPAP Capable Pb-free Halide freePDIP-8626-05NATube50
Specifications
ProductTopologyControl ModeVCC Min (V)VCC Max (V)VO Typ (V)IO Typ (A)Efficiency (%)fSW Typ (kHz)
NCP3065DR2G Design itStep-Down Step-Up/Step-Down Step-UpHysteretic3401.25 to 401.585250
NCP3065MNTXG Design itStep-Up/Step-Down Step-Down Step-UpHysteretic3401.25 to 401.585250
NCV3065DR2G Design itStep-Up Step-Up/Step-Down Step-DownHysteretic3401.25 to 401.585250
NCV3065MNTXG Design itStep-Down Step-Up/Step-Down Step-UpHysteretic3401.25 to 401.585250
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDs (278.0kB) NCP3065
1.5 A Constant Current Buck Boost Inverting Switching Regulator for HB-LEDs with Enable (1139.0kB) NCP3066
NCP3065 Design Worksheet NCP3065
High Intensity LED Drivers Using NCP3065/NCV3065 NCP3065
SOIC-8 Narrow Body CM1216
8 PIN DFN, 4x4 NCP43080
8 LEAD PDIP NE592
NCP3065