Product Overview

Product Overview
NCP1071: High-Voltage Switcher for Low Power Offline SMPS
For complete documentation, see the data sheet
Product Description
The NCP1071 integrate a fixed frequency current mode controller with a 700 V MOSFET. Available in a PDIP-7 or SOT-223
package, the 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 NCP1071 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 22Ω
• Current-Mode Fixed Frequency Operation (65/100/130 kHz)
• Peak Current: NCP1071 = 350mA
• Skip-Cycle Operation at Low Peak Current
• Dynamic Self-Supply (DSS)
• Auto-Recovery Output Short Circuit Protection with TimerBased Detection
• Frequency Foldback Operation
• 300µA No Load Power Consumption
• Frequency Jittering (including during frequency foldback
mode)
• AC Input Voltage Line Detection
For more features, see the data sheet
Applications
•
•
•
•
•
Auxiliary
Standby Isolated Power Supplies
White Goods
Smart Meter
E-Meter
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
End Products
•
•
•
•
•
Auxiliary
Standby Isolated Power Supplies
White Goods
Smart Meter
E-Meter
Part Electrical Specifications
Product
Compliance
Status
Contr fsw
fJitter
ol
Typ
Typ
Mode (kHz) (%)
Stan RDS(O V(BR)
DSS
d-by N)
Max
Mode Typ
(Ω)
(V)
IPeak
(mA)
HV
DSS
Start- (mA)
up
Min
(V)
UVL
O
Short
Circu
it
Prote
ction
Over Brow
Powe n-out
r
Com
pens
ation
Latch Pack
age
Type
NCP1071P065G
Pb-free
Active
Curre 65
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
PDIP
-7
Active
Curre 100
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
PDIP
-7
Active
Curre 130
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
PDIP
-7
Active
Curre 65
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
SOT2234/
TO2614
Active
Curre 100
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
SOT2234/
TO2614
Active
Curre 130
nt
Mode
6
Yes
22
700
350
Yes
8
6.3
Yes
No
No
No
SOT2234/
TO2614
Halide free
NCP1071P100G
Pb-free
Halide free
NCP1071P130G
Pb-free
Halide free
NCP1071STAT3G
Pb-free
Halide free
NCP1071STBT3G
Pb-free
Halide free
NCP1071STCT3G
Pb-free
Halide free
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016