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Sanken - Off-Line PWM Controllers

Numéro de référence STR3A451
Description Off-Line PWM Controllers
Fabricant Sanken 
Logo Sanken 





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STR3A451 fiche technique
Off-Line PWM Controllers with Integrated Power MOSFET
STR3A400 Series
Data Sheet
Description
The STR3A400 series are power ICs for switching
power supplies, incorporating a MOSFET and a current
mode PWM controller IC.
The low standby power is accomplished by the
automatic switching between the PWM operation in
normal operation and the burst-oscillation under light
load conditions. The product achieves high
cost-performance power supply systems with few
external components.
Features
Low Thermal Resistance Package
Improving circuit efficiency (Since the step drive
control can keep VRM of secondary rectification
diodes low, the circuit efficiency can be improved by
low VF)
Current Mode Type PWM Control
Soft Start Function
Automatic Standby Function
No Load Power Consumption < 15mW
Operation Mode
Normal Operation -----------------------------PWM Mode
Light Load Operation ------------------------ Green-Mode
Standby ---------------------------- Burst Oscillation Mode
Random Switching Function
Slope Compensation Function
Leading Edge Blanking Function
Bias Assist Function
Protections
Two Types of Overcurrent Protection (OCP):
Pulse-by-Pulse, built-in compensation circuit to
minimize OCP point variation on AC input voltage
Overload Protection (OLP): Auto-restart
Overvoltage Protection (OVP): Latched shutdown or
auto-restart
Thermal Shutdown (TSD): Latched shutdown or
auto-restart with hysteresis
Typical Application
VAC
BR1
C1
C4
T1 D51
C5 R1
P
D1
C51
S
8 76 5
D/ST D/ST DN/SCT D/ST
U1
STR3A400
S/OCP VCC GND FB/OLP
1234
D2 R2
C2 D
L51
R54
PC1 R51
R55
R52
C52 R53
U51
R56
VOUT
C53
GND
ROCP
C3
PC1
CY
TC_STR3A400_1_R2
Package
DIP8
Not to Scale
Lineup
Electrical Characteristics
fOSC(AVG)(typ.) = 65 kHz
VDSS(min.) = 650 V
Products
STR3A45×
STR3A45×D
OVP, TSD Operation
Latched shutdown
Auto-restart
MOSFET ON Resistance and Output Power, POUT*
POUT
POUT
Products
RDS(ON)
(Adapter)
(Open frame)
(max.) AC230V
AC85
~265V
AC230V
AC85
~265V
STR3A451
4.0 Ω 29.5 W 19.5 W 37 W
STR3A451D
23 W
STR3A453
1.9 Ω
STR3A453D
37 W
27.5 W
53 W
35 W
STR3A455
1.1 Ω
STR3A455D
45 W
35 W
65 W
44 W
* The output power is actual continues power that is measured
at 50 °C ambient. The peak output power can be 120 to
140 % of the value stated here. Core size, ON Duty, and
thermal design affect the output power. It may be less than
the value stated here.
Applications
AC/DC adapter
White goods
Other SMPS
STR3A400-DSE Rev.2.1
SANKEN ELECTRIC CO.,LTD.
Sept. 18, 2015
http://www.sanken-ele.co.jp/en/
© SANKEN ELECTRIC CO.,LTD. 2014
1

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