STR-W6723N SANKEN [Sanken electric], STR-W6723N Datasheet
STR-W6723N
Manufacturer Part Number
STR-W6723N
Description
Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency
Manufacturer
SANKEN [Sanken electric]
Datasheet
1.STR-W6723N.pdf
(2 pages)
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■ ■ ■ ■
■ ■ ■ ■
■ ■ ■ ■
The STR-W6700 series products are power ICs for quasi-resonant type switching power
supplies, incorporating a power MOSFET and a controller IC, The product achieves high
efficiency and low noise power supply systems by the quasi-resonant operation and the
bottom-skip quasi-resonant operation.
The STR-X6700 series products are the different package (TO-3PF) versions.
General Descriptions
Features
Applications
Switching Power Supplies for
Product Lineup
Y: Including the function
Digital Consumer Equipment; LCD-TVs, PDP-TVs, CRT-TVs, etc., Home Appliances, OA Equipments,
Industry Machines, Communication Devices, Others
STR-W6723N
STR-W6734
STR-W6735
STR-W6735N
STR-W6753
STR-W6754
Multi-Mode Control
The operation mode switching with three steps according to load conditions achieves the
optimal high efficiency and low noise power supply systems across the full load range.
(The confirmation of product number is necessary because some functions are different
in each product.)
Current-Mode Control
Built-in PWM Oscillator
The PWM operates with the minimum frequency of around 22 kHz, until the quasi-resonant signal becomes
valid, reduces the stress on components at startup and load-shorted.
Soft-Start Function
Step-Drive Function, reducing switching noise
Built-in Maximum ON Time Limitation Circuit
The function limits the maximum ON time of power MOSFET, during the transitions at low input voltage,
power ON/OFF.
Input Compensation at Overcurrent
The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three
components.
Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
Various Protections
Product No.
Power IC for Quasi-Resonant Type Switching Power Supply
Overload Protection (OLP)-------------------------------------- Latch Shutdown
Overvoltage Protection (OVP) -------------------------------- Latch Shutdown
・In Standby (Under Standby Load Conditions):
・Under Low to Middle Load Conditions: Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR)
・Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR)
Overcurrent Protection (OCP) -------------------------------- Pulse-by-Pulse
－UVLO Intermittent Oscillation by lowering output voltage --- Switched by Standby Signal, or
－Auto Burst-Oscillation --- Switched Automatically
with High Efficiency and Low Noise in Full Load Range
MOSFET
V
DSS
450
500
500
500
650
650
(V)
M
IN
STR-W6700 Series
N: Excluding the function
R
MAX
DS
( )
1.4
1.0
0.57
0.57
1.7
0.96
(
ON
)
Oscillation
Burst-
N
Y
Y
N
Y
Y
Bottom-
Skip QR
Y
Y
Y
Y
Y
Y
STR-W6750F
STR-W6756
STR-W6756N
STR-W6765
STR-W6765N
Product No.
MOSFET
V
DSS
650
650
800
800
650
(V)
M
IN
R
0.73
0.73
0.73
1.8
1.8
MAX
( )
DS
(
ON
)
Oscillation
Burst-
Y
Y
N
Y
N
TO-220F-6
Bottom-
Skip QR
N
Y
Y
Y
Y
2010/08
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STR-W6723N Summary of contents
Page 1
... Switching Power Supplies for Digital Consumer Equipment; LCD-TVs, PDP-TVs, CRT-TVs, etc., Home Appliances, OA Equipments, Industry Machines, Communication Devices, Others ■ ■ ■ ■ Product Lineup MOSFET Product No MAX DSS ( STR-W6723N 450 1.4 STR-W6734 500 1.0 STR-W6735 500 0.57 STR-W6735N 500 0.57 STR-W6753 650 1.7 STR-W6754 650 0.96 ...
Page 2
... Make sure that this is the latest version of the document before use. The operation and circuit examples in this document are provided for reference purposes only. Sanken assumes no liability for violation of industrial property, intellectual property, or other rights of Sanken or third parties, that stem from these examples. ...