NCP1012: High Voltage Switching Regulator for Offline SMPS

The NCP101X series integrates a fixed-frequency current-mode controller and a 700 V voltage MOSFET. Housed in a PDIP7 package, the NCP101X offers everything needed to build a rugged and low-cost power supply, including soft-start, frequency jittering, short-circuit protection, skip-cycle, a maximum peak current setpoint and a Dynamic Self-Supply (no need for an auxiliary winding).Unlike other monolithic solutions, the NCP101X is quiet by nature: during nominal load operation, the part switches at one of the available frequencies (65-100-130 kHz). When the current setpoint falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so-called skip cycle mode and provides excellent efficiency at light loads. Because this occurs at typically 1/4 of the maximum peak value, no acoustic noise takes place. As a result, standby power is reduced to the minimum without acoustic noise generation.

Features

Built-in 700V MOSFET with Typical RdsON of 11 or 22 Ohms
Large Creepage Distance between High-Voltage Pins
Current- Mode Fixed Frequency Operation: 65kHz - 100kHz - 130kHz
Skip-Cycle Operation at Low Peak Currents Only: No Acoustic Noise!
Dynamic Self-Supply, No Need of an Auxiliary Winding
Internal 1ms Soft-Start
Auto-Recovery Internal Output Short-Circuit Protection
Latched Overvoltage Protection with Auxiliary Winding Operation
Frequency Jittering for better EMI Signature
Below 100 mW Standby Power if Auxiliary Winding is Used
Internal Temperature Shutdown
Direct Optocoupler Connection
SPICE Models Available for Transient AC analysis
Pb-Free Packages are Available

Applications

Auxiliary Power Supplies

End Products

Low Power AC/DC Adapter for Chargers

Design & Development Tools (1)

Document Title	Document ID/Size	Revision	Revision Date
Flyback Current Mode Loop Compensation Design Worksheet	FLYBACK DWS.XLS.ZIP (3516kB)	10	Dec, 2014

Package Drawings (3)

Document Title	Document ID/Size	Revision
PDIP (8 Minus Pin 6), Gull Wing	626AA (27.5kB)	O
PDIP-7 (PDIP-8 LESS PIN 6)	626A-01 (34.2kB)	C
SOT-223 (TO-261) 4 LEAD	318E-04 (68.4kB)	N

Application Notes (15)

Document Title	Document ID/Size	Revision
A 6 W/12 W Universal Mains Adapter with the NCP101X	AND8142/D (161.0kB)	0
Designing Converters with the NCP101X Family	AND8134/D (140.0kB)	0
Evaluating the Power Capability of NCP101X Members	AND8125/D (57.0kB)	0
Implementing Simple Brown-Out Solution for NCP101X Series	AND8272/D (43.0kB)	0
Increasing the Efficiency of Low Power Converters with Resonant Snubbers	AND8296/D (98.0kB)	1
NCP101x LED Flasher with Luxeon V Star LED	AND8224/D (98.0kB)	0
Non-isolated Negative Output Buck AC/DC Converter	AND8190/D (49.0kB)	0
Non-isolated Positive Output Buck/Boost AC/DC Converter	AND8191/D (58.0kB)	0
Nonisolated Negative Output Buck/Boost AC/DC Convertor	AND8225/D (887.0kB)	1
Nonisolated Positive Output Buck AC/DC Converter	AND8226/D (1563.0kB)	1
Offline Buck Converter with Tapped Inductor Improves Performance	AND8318/D (100.0kB)	1
Performance Improvements to the NCP1012 Evaluation Board	AND8132/D (95.0kB)	0
Simple Secondary Side Vcc Source for Low Power CVCC Power Supplies	AND8395/D (124.0kB)	0
Stability Analysis in Multiple Loop Systems	AND8327/D (213.0kB)	0
Understanding Loop Compensation with Monolithic Switchers	AND8334/D (167.0kB)	0

Evaluation Board Documents (4)

Document Title	Document ID/Size	Revision	Revision Date
NCP1012GEVB Bill of Materials ROHS Compliant	NCP1012GEVB_BOM_ROHS.PDF (181.0kB)	0
NCP1012GEVB Gerber Layout Files (Zip Format)	NCP1012GEVB_GERBER.ZIP (23.0kB)	0
NCP1012GEVB Schematic	NCP1012GEVB_SCHEMATIC.PDF (136.0kB)	0
NCP1012GEVB Test Procedure	NCP1012GEVB_TEST_PROCEDURE.PDF (135.0kB)	0

Simulation Models (2)

Document Title	Document ID/Size	Revision	Revision Date
IsSpice model for NCP101X	NCP101X_ISSPICE (160.0kB)	0
OrCAD model for NCP101X	NCP101X_ORCAD (26.0kB)	0

Data Sheets (1)

Document Title	Document ID/Size	Revision	Revision Date
Self-Supplied Monolithic Switcher for Low Standby-Power Offline SMPS	NCP1010/D (346kB)	24	Oct, 2016

Evaluation/Development Tool Information

Product	Status	Compliance	Short Description
NCP1012GEVB	Active	Pb-free	SMPS Switcher Evaluation Board

Order Information

Product	Status	Compliance	Package		MSL*	Container		Budgetary Price/Unit
NCP1012AP065G	Active	Pb-free Halide free	PDIP-7	626A-01	NA	Tube	50	$0.3
NCP1012AP100G	Active	Pb-free Halide free	PDIP-7	626A-01	NA	Tube	50	$0.4
NCP1012AP133G	Active	Pb-free Halide free	PDIP-7	626A-01	NA	Tube	50	$0.3
NCP1012APL065R2G	Obsolete	Pb-free Halide free	PDIP-7	626AA	3	Tape and Reel	1000
NCP1012APL100R2G	Obsolete	Pb-free Halide free	PDIP-7	626AA	3	Tape and Reel	1000
NCP1012APL130R2G	Consult Sales Office	Pb-free Halide free	PDIP-7	626AA	3	Tape and Reel	1000
NCP1012ST100T3G	Active	Pb-free Halide free	SOT-223-4 / TO-261-4	318E-04	1	Tape and Reel	4000	$0.4667
NCP1012ST130T3G	Active	Pb-free Halide free	SOT-223-4 / TO-261-4	318E-04	1	Tape and Reel	4000	$0.35
NCP1012ST65T3G	Active	Pb-free Halide free	SOT-223-4 / TO-261-4	318E-04	1	Tape and Reel	4000	$0.35

Specifications

Product	Control Mode	fsw Typ (kHz)	fJitter Typ (%)	Stand-by Mode	RDS(ON) Typ (Ω)	V(BR)DSS Max (V)	IPeak (mA)	HV Start-up Min (V)	DSS (mA)	UVLO	Short Circuit Protection	Over Power Compensation	Brown-out	Latch
NCP1012AP065G Design it	Current Mode	65	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes
NCP1012AP100G Design it	Current Mode	100	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes
NCP1012AP133G Design it	Current Mode	133	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes
NCP1012ST100T3G Design it	Current Mode	100	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes
NCP1012ST130T3G Design it	Current Mode	130	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes
NCP1012ST65T3G Design it	Current Mode	65	Yes	Yes	11	700	250	Yes	8	Yes	Yes	No	No	Yes