Product Overview

Product Overview
NCP1027: High Voltage Switching Regulator for Offline SMPS
For complete documentation, see the data sheet
Product Description
The NCP1027 offers a new solution targeting output power levels from a few watts up to 15W in a universal mains flyback
application. Our proprietary high-voltage technology lets us include a power MOSFET together with a startup current source, all
directly connected to the bulk capacitor. To prevent lethal runaway in low input voltage conditions, an adjustable brown-out circuitry
blocks the activity until sufficient input level is reached.
Current-mode operation together with an adjustable ramp compensation offers superior performance in universal mains applications.
Protection wise, a timer detects an overload or a short-circuit and stops all operations, ensuring a safe auto-recovery, low duty cycle
burst operation. An integrated, auto-recovery, Overvoltage Protection permanently monitors the VCC level and temporarily shuts
down the driving pulses in case of an unexpected feedback loop runaway.
Finally, a great RDS(on) figure makes the circuit an excellent choice for standby/auxiliary offline power supplies or applications
requiring higher output power levels.
Features
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Built-in 700 V MOSFET with Typical RDS(on) of 5.8 , Tj = 25C
Current-Mode Fixed Frequency Operation: 65 & 100 kHz
Fixed Peak Current of 800 mA
Proprietary Skip-Cycle Operation at Low Peak Currents
Internal Current Source for Clean and Lossless Startup Sequence
Auto-Recovery Output Short Circuit Protection with Timer-Based Detection
Auto-Recovery Overvoltage Protection with Auxiliary Winding Operation
Programmable Brown-Out Input for Low Input Voltage Detection
Input to Permanently Latchoff the Part
Internal Frequency Jittering for Improved EMI Signature
For more features, see the data sheet
Applications
End Products
• Medium Power AC-DC Adapters for Chargers
• Auxiliary power supply
• Medium Power AC-DC power supply for CE apparatus
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Mpeg3 players
Flat Tvs: LCD and Plasma
Deskop PC, Server
DVD, Set Top Box
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
NCP1027P065G
Pb-free
Active
Curre 65
nt
Mode
Yes
Yes
5.6
700
800
Yes
N/A
Yes
Yes
Yes
Yes
Yes
PDIP
-7
Active
Curre 100
nt
Mode
Yes
Yes
5.6
700
800
Yes
N/A
Yes
Yes
Yes
Yes
Yes
PDIP
-7
Halide free
NCP1027P100G
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016