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NCP1072: High Voltage Switching Regulator for Offline SMPS

Datasheet: High-Voltage Switcher for Low Power Offline SMPS
Rev. 9 (788kB)
Product Overview
»View Reliability Data
»View Material Composition
» Product Change Notification
The NCP1072 / NCP1075 products integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP-7 or SOT-223 package, the NCP1072/5 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 NCP1072/5 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   Benefits
     
  • Integrated 700 V MOSFET with RDS(on) of 11 Ω
 
  • Up to 20W output SMPS design capability
  • Current-Mode Fixed Frequency Operation (65/100/130 kHz)
 
  • Ability to scale for efficiency or size
  • Peak Current: NCP1072 = 250mA / NCP1075 = 450 mA
 
  • Adjust output current protection based on output power demand
  • Skip-Cycle Operation at Low Peak Current
 
  • Eliminate acoustic noise
  • Dynamic Self-Supply (DSS)
 
  • Eliminate Aux winding
  • Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
 
  • Provides more robust protection without worrying about the coupling of the aux winding
  • Frequency Foldback Operation
 
  • Improved efficiency at light load / Improved EMI over the entire load
  • 300µA No Load Power Consumption
 
  • <50mW no Load Power Consumption
  • Frequency Jittering (including during frequency foldback mode)
 
  • Better EMI Signature Over the Entire Operating Range
  • AC Input Voltage Line Detection
 
  • Enhanced Protection Against Faults With Low Input Voltage
Applications   End Products
  • Auxiliary Supply
  • Isolated Standby Power Supply
 
  • White Goods
  • Smart Meter / E-Meter
Evaluation/Development Tool Information
Product Status Compliance Short Description Action
NCP1072DIPGEVB Active
Pb-free
6 W SMPS Evaluation Board
Availability & Samples
Specifications
Application Diagram
Product
Status
Compliance
Description
Package
MSL
Container
Budgetary Price/Unit
Type
Case Outline
Type
Temperature
Type
Qty.
NCP1072P065G Active
Pb-free
Halide free
NCP1072 PDIP-7 626A-01 NA Tube 50 $0.518
NCP1072P100BG Active
Pb-free
Halide free
NCP1072 PDIP-7 626A-01 NA Tube 50 $0.4933
NCP1072P100G Active
Pb-free
Halide free
NCP1072 PDIP-7 626A-01 NA Tube 50 $0.518
NCP1072STAT3G Active
Pb-free
Halide free
NCP1072 SOT-223-4 / TO-261-4D 0.0318 1 260 Tape and Reel 4000 $0.4933
NCP1072STBT3G Active
Pb-free
Halide free
NCP1072 SOT-223-4 / TO-261-4D 0.0318 1 260 Tape and Reel 4000 $0.4933
Market Leadtime (weeks) : 2 to 4
ON Semiconductor   (2020-09-02 00:00) : 11,050
Market Leadtime (weeks) : 13 to 16
Market Leadtime (weeks) : 2 to 4
Market Leadtime (weeks) : Contact Factory
Market Leadtime (weeks) : 17 to 20

Product
Description
Pricing ($/Unit)
Compliance
Status
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
Package Type
NCP1072P065G  
 $0.518 
Pb
H
 Active   
Current Mode
65
Yes
Yes
11
700
250
Yes
8
6.4
Yes
No
No
No
PDIP-7
NCP1072P100BG  
 $0.4933 
Pb
H
 Active   
Current Mode
100
Yes
Yes
11
700
250
Yes
8
6.4
Yes
No
No
No
PDIP-7
NCP1072P100G  
 $0.518 
Pb
H
 Active   
Current Mode
100
Yes
Yes
11
700
250
Yes
8
6.4
Yes
No
No
No
PDIP-7
NCP1072STAT3G  
 $0.4933 
Pb
H
 Active   
Current Mode
65
Yes
Yes
11
700
250
Yes
8
6.4
Yes
No
No
No
SOT-223-4 / TO-261-4D
NCP1072STBT3G  
 $0.4933 
Pb
H
 Active   
Current Mode
100
Yes
Yes
11
700
250
Yes
8
6.4
Yes
No
No
No
SOT-223-4 / TO-261-4D
Case Outlines
626A-01    0.0318   
NCP1072: High Voltage Switching Regulator for Offline SMPS
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Featured Video
6 W Switched-Mode Power Supply Evaluation Board - NCP1072DIPGEVB
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