NCP1070: High-Voltage Switcher Regulator for Low Power Offline SMPS

The NCP1070 / NCP1071 integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP−7 or SOT−223 package, the NCP1070 /NCP1071 offers 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 NCP1070 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.NCP1070 = 250mA peak current limitNCP1071 = 350mA peak current limit

Features
  • Integrated 700 V MOSFET with RDS(on) of 22 Ω
  • Current-Mode Fixed Frequency Operation (65/100/130 kHz)
  • Peak Current: NCP1070 = 250mA
  • Skip-Cycle Operation at Low Peak Current
  • Dynamic Self-Supply (DSS)
  • Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
  • Frequency Foldback Operation
  • 300µA No Load Power Consumption
  • Frequency Jittering (including during frequency foldback mode)
  • AC Input Voltage Line Detection
Benefits
  • Up to 20W 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
  • Auxilary
  • Standby Isolated Power Supplies
  • White Goods
  • Smart Meters
  • E-Meter
End Products
  • Auxiliary
  • Standby Isolated Power Supplies
  • White Goods
  • Smart Meter
  • E-Meter
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
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
High-Voltage Switcher for Low Power Offline SMPSNCP1070/D (790kB)7Apr, 2016
Evaluation Board Documents (4)
Document TitleDocument ID/SizeRevisionRevision Date
NCP1070SOTGEVB Bill of Materials ROHS CompliantNCP1070SOTGEVB_BOM_ROHS (33kB)0
NCP1070SOTGEVB Gerber Layout Files (Zip Format)NCP1070SOTGEVB_GERBER (55kB)0
NCP1070SOTGEVB SchematicNCP1070SOTGEVB_SCHEMATIC (24kB)0
NCP1070SOTGEVB Test ProcedureNCP1070SOTGEVB_TEST_PROCEDURE (93kB)0
Evaluation/Development Tool Information
ProductStatusComplianceShort Description
NCP1070SOTGEVBActivePb-freeLow Power Offline SMPS High-Voltage Switcher Regulator Evaluation Board
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1070P065GActivePb-free Halide freePDIP-7626A-01NATube50$0.34
NCP1070P100GActivePb-free Halide freePDIP-7626A-01NATube50$0.34
NCP1070P130GActivePb-free Halide freePDIP-7626A-01NATube50$0.34
NCP1070STAT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.33
NCP1070STBT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.33
NCP1070STCT3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.33
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
NCP1070P065GCurrent Mode656Yes22700250Yes86.3YesNoNoNo
NCP1070P100GCurrent Mode1006Yes22700250Yes86.3YesNoNoNo
NCP1070P130GCurrent Mode1306Yes22700250Yes86.3YesNoNoNo
NCP1070STAT3GCurrent Mode656Yes22700250Yes86.3YesNoNoNo
NCP1070STBT3GCurrent Mode1006Yes22700250Yes86.3YesNoNoNo
NCP1070STCT3GCurrent Mode1306Yes22700250Yes86.3YesNoNoNo
High-Voltage Switcher for Low Power Offline SMPS (790kB) NCP1077
NCP1070SOTGEVB BOM ROHS - 33 KB NCP1070SOTGEVB
NCP1070SOTGEVB GERBER - 55 KB NCP1070SOTGEVB
NCP1070SOTGEVB SCHEMATIC - 24 KB NCP1070SOTGEVB
NCP1070SOTGEVB TEST PROCEDURE - 93 KB NCP1070SOTGEVB
PDIP-7 (PDIP-8 LESS PIN 6) NCP1077
SOT-223 (TO-261) 4 LEAD NCV8452