© Semiconductor Components Industries, LLC, 2016
February, 2017 − Rev. 0
1 Publication Order Number:
NCP43080/D
NCP43080
Synchronous Rectifier
Controller
The NCP43080 is a synchronous rectifier controller for switch
mode power supplies. The controller enables high efficiency designs
for flyback and quasi resonant flyback topologies.
Externally adjustable minimum off−time and on−time blanking
periods provides flexibility to drive various MOSFET package types
and PCB layout. A reliable and noise less operation of the SR system is
insured due to the Self Synchronization feature. The NCP43080 also
utilizes Kelvin connection of the driver to the MOSFET to achieve high
efficiency operation at full load and utilizes a light load detection
architecture to achieve high efficiency at light load.
The precise turn−off threshold, extremely low turn−off delay time
and high sink current capability of the driver allow the maximum
synchronous rectification MOSFET conduction time. The high
accuracy driver and 5 V gate clamp make it ideally suited for directly
driving GaN devices.
Features
Self−Contained Control of Synchronous Rectifier in CCM, DCM and
QR for Flyback, Forward or LLC Applications
Precise True Secondary Zero Current Detection
Rugged Current Sense Pin (up to 150 V)
Adjustable Minimum ON−Time
Adjustable Minimum OFF-Time with Ringing Detection
Adjustable Maximum ON−Time for CCM Controlling of Primary
QR Controller
Improved Robust Self Synchronization Capability
8 A / 4 A Peak Current Sink / Source Drive Capability
Operating Voltage Range up to V
CC
= 35 V
Automatic Light−load & Disable Mode
Adaptive Gate Drive Clamp
GaN Transistor Driving Capability (options A and C)
Low Startup and Disable Current Consumption
Maximum Operation Frequency up to 1 MHz
SOIC-8 and DFN−8 (4x4) and WDFN8 (2x2) Packages
These are Pb−Free Devices
Typical Applications
Notebook Adapters
High Power Density AC/DC Power Supplies (Cell Phone Chargers)
LCD TVs
All SMPS with High Efficiency Requirements
SOIC−8
D SUFFIX
CASE 751
MARKING
DIAGRAMS
43080x = Specific Device Code
x = A, B, C, D or Q
Fx = Specific Device Code
x = A or D
A = Assembly Location
L = Wafer Lot
Y = Year
W = Work Week
M = Date Code
G = Pb−Free Package
1
8
43080x
ALYW G
G
1
8
(Note: Microdot may be in either location)
43080x
ALYWG
G
1
DFN8
MN SUFFIX
CASE 488AF
www.onsemi.com
See detailed ordering and shipping information on page 33 o
f
this data sheet.
ORDERING INFORMATION
FxMG
G
1
WDFN8
MT SUFFIX
CASE 511AT
NCP43080
www.onsemi.com
2
Figure 1. Typical Application Example − LLC Converter with Optional LLD
D1
OK1
RTN
MIN_TON
MIN_TOFF
MIN_TON
MIN_TOFF
Figure 2. Typical Application Example − DCM, CCM or QR Flyback Converter with optional LLD
+
+
+
Vbulk
FLYBACK
CONTROL
CIRCUITRY
+Vout
GND
OK1
R1
R2
R8
R4
C1
C2
C3
C4
C5
D3
D4
D5
TR1
M1
M2
R5
R6
C6
D6
R7
R3
C7
VCC
DRV
FB CS
NCP43080
www.onsemi.com
3
Figure 3. Typical Application Example − Primary Side Flyback Converter with optional LLD
+
+
+
Vbulk
FLYBACK
SIDE
CONTROLLER
+Vout
GND
R1
R2
R7
R6
C1
C2
C3
C7
C10
D3
D4
TR1
M1
M2
R9
R10
C8
D6
R11
PRIMARY
C4
C5
C6
R3
R4
R5
C9
R8
VCC
DRV
COMP CS
ZCD
Figure 4. Typical Application Example − QR Converter − Capability to Force Primary into CCM Under Heavy
Loads utilizing MAX−TON
+
+
+
Vbulk
QR
CONTROL
CIRCUITRY
+Vout
GND
OK1
R5
R6
R7
R9
R10
C1
C4
C7
D3
D4
D5
TR1
TR2
M1
M3
NCP43080Q
R11
R12
R13
D6
D7
D1
R1
R14
R15
R16
M2
D8
R17
R18
R19
C2
C8 C9
C5
C6
C3
VCC
DRV
FB CSZCD

NCP43080DMNTWG

Mfr. #:
Manufacturer:
ON Semiconductor
Description:
Switching Controllers SYNC-RECTIFER CONTROLLER
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet