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  ON Semiconductor Electronic Components Datasheet  

NCP1612A1 Datasheet

High-Efficiency Power Factor Controller

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NCP1612A1 pdf
NCP1612A, NCP1612B,
NCP1612A1, NCP1612A2,
NCP1612A3, NCP1612B2
Enhanced, High‐Efficiency
Power Factor Controller
The NCP1612 is designed to drive PFC boost stages based on an
innovative Current Controlled Frequency Foldback (CCFF)
method. In this mode, the circuit classically operates in Critical
conduction Mode (CrM) when the inductor current exceeds a
programmable value. When the current is below this preset level, the
NCP1612 linearly decays the frequency down to about 20 kHz when
the current is null. CCFF maximizes the efficiency at both nominal
and light load. In particular, the stand-by losses are reduced to a
minimum.
Like in FCCrM controllers, an internal circuitry allows near-unity
power factor even when the switching frequency is reduced. Housed in
a SO10 package, the circuit also incorporates the features necessary
for robust and compact PFC stages, with few external components.
General Features
Near-unity Power Factor
Critical Conduction Mode (CrM)
Current Controlled Frequency Fold-back (CCFF): Low Frequency
Operation is Forced at Low Current Levels
On-time Modulation to Maintain a Proper Current Shaping in CCFF
Mode
Skip Mode Near the Line Zero Crossing
Fast Line/Load Transient Compensation
(Dynamic Response Enhancer)
Valley Turn On
High Drive Capability: 500 mA/+800 mA
VCC Range: from 9.5 V to 35 V
Low Start-up Consumption
Six Versions: NCP1612A, B, A1, A2, A3 and B2 (see Table 1)
Line Range Detection
pfcOK Signal
This is a Pb-Free Device
www.onsemi.com
SOIC10
CASE 751BQ
MARKING DIAGRAM
10
1612x
ALYW
G
1
1612x
A
L
Y
W
G
= Specific Device Code
x = A, A1, A2, A3, B or B2
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb-Free Package
PIN CONNECTIONS
FOVP
Feedback
Vcontrol
Vsense
FFcontrol
1
(Top View)
pfcOK
VCC
DRV
GND
CS/ZCD
ORDERING INFORMATION
See detailed ordering and shipping information on page 32 of
this data sheet.
Safety Features
Separate Pin for Fast Over-voltage Protection (FOVP)
for Redundancy
Soft Over-voltage Protection
Brown-out Detection
Soft-start for Smooth Start-up Operation
(A, A1, A2 and A3 Versions)
Over Current Limitation
Disable Protection if the Feedback is Not Connected
Thermal Shutdown
Latched Off Capability
Low Duty-cycle Operation if the Bypass Diode is
shorted
Open Ground Pin Fault Monitoring
Saturated Inductor Protection
Detailed Safety Testing Analysis
(Refer to Application Note AND9079/D)
© Semiconductor Components Industries, LLC, 2016
May, 2016 Rev. 9
1
Publication Order Number:
NCP1612/D


  ON Semiconductor Electronic Components Datasheet  

NCP1612A1 Datasheet

High-Efficiency Power Factor Controller

No Preview Available !

NCP1612A1 pdf
NCP1612A, NCP1612B, NCP1612A1, NCP1612A2, NCP1612A3, NCP1612B2
Typical Applications
PC Power Supplies
All Off Line Appliances Requiring Power Factor
Correction
Figure 1. Typical Application Schematic
www.onsemi.com
2


Part Number NCP1612A1
Description High-Efficiency Power Factor Controller
Maker ON Semiconductor
Total Page 30 Pages
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