Product Overview

Product Overview
NCP1380: Controller, Quasi-Resonant Current Mode
For complete documentation, see the data sheet
Product Description
The NCP1380 is a high performance device aimed at powering quasi-resonant converters. Capitalizing on a proprietary valley
lockout system, the controller shifts gears and reduces the switching frequency as the power loading becomes lighter. This results in
a stable operation despite switching events always triggering in the drain-source valley. This system works down to the 4th valley
and toggles to a variable frequency mode beyond, ensuring an excellent standby power performance. To improve the safety in the
overload situations, the controller includes an Over Power Protection (OPP) circuit which clamps the delivered power at high-line.
Safety-wise, a fixed internal timer relies on the feedback voltage to detect a fault. Once the timer elapses, the controller stops and
stays latched for option A and C or enters auto-recovery mode for option B and D. Particularly well suited for adapter applications,
the controller features a pin to implement either a combined overvoltage / overtemperature protection (version A and B) or a
combined brownout / overvoltage protection (version C and D).
Features
•
•
•
•
•
•
•
•
•
Benefits
Quasi-resonant peak current mode control operation
Valley switching operation with valley lockout
Frequency foldback at light load
Adjustable overpower protection
Auto-recovery or latched internal output short circuit
protection
Fixed internal 80 ms timer for short circuit protection
Combined overvoltage and overtemperature protection (A
and B versions)
Combined overvoltage protection and brownout (C and D
versions)
VCC range operation up to 28 V
Applications
• High efficiency operation
• Provides for noise-immune operation
• Improves light load efficiency
End Products
• AC-DC adapters for notebooks
• Power AC-DC converters for adapters, TVs and set top
boxes
• Offline battery chargers
• Auxiliary power supplies (flat TV, appliances)
Part Electrical Specifications
Product
Compliance
Status
Topolog
y
Control
Mode
fsw Typ
(kHz)
StandUVLO
by Mode (V)
Short
Circuit
Protecti
on
Latch
Soft
Start
VCC Max Drive
(V)
Cap.
(mA)
Packag
e Type
NCP1380ADR2G
Pb-free
Active
Flyback
Current
Mode
Variable
Yes
9
Yes
Yes
Yes
28
500 /
800
SOIC-8
Active
Flyback
Current
Mode
Variable
Yes
9
Yes
No
Yes
28
500 /
800
SOIC-8
Active
Flyback
Current
Mode
Variable
Yes
9
Yes
Yes
Yes
28
500 /
800
SOIC-8
Active
Flyback
Current
Mode
Variable
Yes
9
Yes
No
Yes
28
500 /
800
SOIC-8
Halide free
NCP1380BDR2G
Pb-free
Halide free
NCP1380CDR2G
Pb-free
Halide free
NCP1380DDR2G
Pb-free
Halide free
Application Diagram
For more information please contact your local sales support at www.onsemi.com
Created on: 6/30/2016