NCP1052: Monolithic High Voltage Gated Oscillator Power Switching Regulator

The NCP1050 through NCP1055 are monolithic high voltage regulators that enable end product equipment to be compliant with low standby power requirements. This device series combines the required converter functions allowing a simple and economical power system solution for office automation, consumer, and industrial products. These devices are designed to operate directly from a rectified AC line source. In flyback converter applications they are capable of providing an output power that ranges from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V, and 3.0 W to 20 W with a variable AC input that ranges from 85 V to 265 V. This device series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer, fault logic with a programmable timer for converter overload protection, unique gated oscillator configuration for extremely fast loop response with double pulse suppression, power switch current limiting, input undervoltage lockout with hysteresis, thermal shutdown, and auto restart fault detection. These devices are available in an economical 8-pin dual-in-line package.

Features
  • Startup Circuit Eliminates the Need for Transformer Auxiliary Bias Winding
  • Optional Auxiliary Bias Winding Override for Lowest Standby Power Applications
  • Converter Output Overload and Open Loop Protection
  • Auto Restart Fault Protection
  • IC Thermal Fault Protection
  • Unique, Dual Edge, Gated Oscillator Configuration for Extremely Fast Loop Response
  • Oscillator Frequency Dithering with Controlled Slew Rate Driver for Reduced EMI
  • Low Power Consumption Allowing European Blue Angel Compliance
  • On–Chip 700 V Power Switch Circuit and Active Startup Circuit
  • Rectified AC Line Source Operation from 85 V to 265 V
  • Input Undervoltage Lockout with Hysteresis
  • Oscillator Frequency Options of 44 kHz, 100 kHz, 136 kHz
  • Pb-Free Packages are Available
Applications
  • AC–DC Converters
  • Wall Adapters
  • Portable Electronic Chargers
  • Low Power Standby and Keep–Alive Supplies
Design & Development Tools (1)
Document TitleDocument ID/SizeRevisionRevision Date
NCP105x Design WorksheetNCP105X DWS.XLS (354.0kB)2
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
Monolithic High Voltage Gated Oscillator Power Switching RegulatorNCP1050/D (275kB)14Apr, 2015
Application Notes (5)
Document TitleDocument ID/SizeRevisionRevision Date
5.0 V, 2.0 A Flyback ConverterAND8099/D (204.0kB)2
How to Choose Switching Controller for DesignAND8205/D (78kB)2Jan, 2014
Low-Cost 100 mA High-Voltage Buck and Buck-Boost Using NCP1052AND8098/D (93.0kB)1
Offline Buck Converter with Tapped Inductor Improves PerformanceAND8318/D (100.0kB)1
Stability Analysis in Multiple Loop SystemsAND8327/D (213.0kB)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
Simulation Models (3)
Document TitleDocument ID/SizeRevisionRevision Date
IsSpice Model for NCP105xNCP105X_FLYBACK.DWG (117.0kB)0
IsSpice Model for NCP105xNCP105X_BUCK.DWG (33.0kB)0
PSpice models for NCP105xNCP105X_ORCAD.ZIP (36.0kB)0
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
NCP1052P100GLast ShipmentsPb-free Halide freePDIP-7626A-01NATube50
NCP1052P136GLast ShipmentsPb-free Halide freePDIP-7626A-01NATube50
NCP1052P44GLast ShipmentsPb-free Halide freePDIP-7626A-01NATube50
NCP1052ST100T3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.58
NCP1052ST136T3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.58
NCP1052ST44T3GActivePb-free Halide freeSOT-223-4 / TO-261-4318E-041Tape and Reel4000$0.58
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
NCP1052ST100T3GCurrent Mode100YesYes30700300Yes6.3YesYesNoNoYes
NCP1052ST136T3GCurrent Mode136YesYes30700300Yes6.3YesYesNoNoYes
NCP1052ST44T3GCurrent Mode44YesYes30700300Yes6.3YesYesNoNoYes
Monolithic High Voltage Gated Oscillator Power Switching Regulator (275kB) NCP1055
NCP105x Design Worksheet NCP1055
5.0 V, 2.0 A Flyback Converter 1N5822
How to Choose Switching Controller for Design NCP1052
Low-Cost 100 mA High-Voltage Buck and Buck-Boost Using NCP1052 NCP1055
Offline Buck Converter with Tapped Inductor Improves Performance NCP1055
Stability Analysis in Multiple Loop Systems NCP1055
IsSpice Model for NCP105x NCP1055
IsSpice Model for NCP105x NCP1055
PSpice models for NCP105x NCP1055
PDIP-7 (PDIP-8 LESS PIN 6) NCP1077
SOT-223 (TO-261) 4 LEAD NCV8452
NCP1055