NCP1076: High Voltage Switching Regulator for Offline SMPS

The NCP1076 / NCP1077 products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP-7 or SOT-223 package, the NCP1076/7 offer a high level of integration, including soft-start, frequency-jittering, short-circuit protection, skip-cycle, a maximum peak current set point, ramp compensation, and a Dynamic Self-Supply (eliminating the need for an auxiliary winding). Unlike other monolithic solutions, the NCP1076/7 is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65, 100 or 130 kHz). When the output power demand diminishes, the IC automatically enters frequency foldback mode and provides excellent efficiency at light loads. When the power demand reduces further, it enters into a skip mode to reduce the standby consumption down to a no load condition. Protection features include: a timer to detect an overload or a short-circuit event, Overvoltage Protection with auto-recovery and AC input line voltage detection. For improved standby performance, the connection of an auxiliary winding stops the DSS operation and helps to reduce input power consumption below 50 mW at high line.

Features
  • Integrated 700 V MOSFET with RDS(on) of 4 Ω
  • Current-Mode Fixed Frequency Operation (65/100/130 kHz)
  • Peak Current: NCP1076 = 650mA / NCP1077 = 800 mA
  • Skip-Cycle Operation at Low Peak Current
  • Dynamic Self-Supply (DSS)
  • Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
  • Frequency Foldback Operation
  • 300 µA No Load Power Consumption
  • Frequency Jittering (including during frequency foldback mode)
  • AC Input Voltage Line Detection
Benefits
  • Up to 30W output SMPS design capability
  • Ability to scale for efficiency or size
  • Adjust output current protection based on output power demand
  • Eliminate acoustic noise
  • Eliminate Aux winding
  • Provides more robust protection without worrying about the coupling of the aux winding
  • Improved efficiency at light load / Improved EMI over the entire load
  • <50mW no Load Power Consumption
  • Better EMI Signature Over the Entire Operating Range
  • Enhanced Protection Against Faults With Low Input Voltage
Applications
  • Auxiliary Supply
  • Isolated Standby Power Supply
End Products
  • White Goods
  • E-Meters
  • Industrial
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
Flyback Transformer Design ToolFLYBACK TRANSFORMER DESIGN TOOL (21.0kB)0
Package Drawings (2)
Document TitleDocument ID/SizeRevision
PDIP-7 (PDIP-8 LESS PIN 6)626A-01 (34.2kB)C
SOT-223 (TO-261) 4 LEAD318E-04 (68.4kB)N
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1076DIPGEVB Bill of Materials ROHS CompliantNCP1076DIPGEVB_BOM_ROHS (86kB)0
NCP1076DIPGEVB Gerber Layout Files (Zip Format)NCP1076DIPGEVB_GERBER (88kB)0
NCP1076DIPGEVB SchematicNCP1076DIPGEVB_SCHEMATIC (204kB)0
NCP1076DIPGEVB Test ProcedureNCP1076DIPGEVB_TEST_PROCEDURE (90kB)0
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
High-Voltage Switcher for Low Power Offline SMPSNCP1070/D (790kB)7Apr, 2016
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1076DIPGEVBActivePb-free20W High Voltage Switching Regulator for Offline SMPS Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1076P065GActivePb-free Halide freePDIP-7626A-01NATube50$0.36
NCP1076P100GActivePb-free Halide freePDIP-7626A-01NATube50$0.36
NCP1076P130GActivePb-free Halide freePDIP-7626A-01NATube50$0.36
NCP1076STAT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.36
NCP1076STBT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.36
NCP1076STCT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.36
Specifications
ProductControl Modefsw Typ (kHz)fJitter Typ (%)Stand-by ModeRDS(ON) Typ (Ω)V(BR)DSS Max (V)IPeak (mA)HV Start-up Min (V)DSS (mA)UVLOShort Circuit ProtectionOver Power CompensationBrown-outLatch
NCP1076P065GCurrent Mode65YesYes4700650Yes86.4YesNoNoNo
NCP1076P100GCurrent Mode100YesYes4700650Yes86.4YesNoNoNo
NCP1076P130GCurrent Mode130YesYes4700650Yes86.4YesNoNoNo
NCP1076STAT3GCurrent Mode65YesYes4700650Yes86.4YesNoNoNo
NCP1076STBT3GCurrent Mode100YesYes4700650Yes86.4YesNoNoNo
NCP1076STCT3GCurrent Mode130YesYes4700650Yes86.4YesNoNoNo
High-Voltage Switcher for Low Power Offline SMPS (790kB) NCP1077
Flyback Transformer Design Tool NCP1129
NCP1076DIPGEVB BOM ROHS - 86 KB NCP1076DIPGEVB
NCP1076DIPGEVB GERBER - 88 KB NCP1076DIPGEVB
NCP1076DIPGEVB SCHEMATIC - 204 KB NCP1076DIPGEVB
NCP1076DIPGEVB TEST PROCEDURE - 90 KB NCP1076DIPGEVB
PDIP-7 (PDIP-8 LESS PIN 6) NCP1077
SOT-223 (TO-261) 4 LEAD NCV8452