Product Overview

Product Overview
NCP1050: Monolithic High Voltage Gated Oscillator Power Switching
Regulator
For complete documentation, see the data sheet
Product Description
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
For more features, see the data sheet
Applications
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AC–DC Converters
Wall Adapters
Portable Electronic Chargers
Low Power Standby and Keep–Alive Supplies
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
NCP1050ST100T3G
Pb-free
Active
Curre 100
nt
Mode
Yes
Yes
30
700
100
Yes
6.3
Yes
Yes
No
No
Yes
SOT2234/
TO2614
Active
Curre 136
nt
Mode
Yes
Yes
30
700
100
Yes
6.3
Yes
Yes
No
No
Yes
SOT2234/
TO2614
Active
Curre 44
nt
Mode
Yes
Yes
30
700
100
Yes
6.3
Yes
Yes
No
No
Yes
SOT2234/
TO2614
Halide free
NCP1050ST136T3G
Pb-free
Halide free
NCP1050ST44T3G
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016