STR3A400 Datasheet, PDF (1/26 Pages) Sanken electric – Off-Line PWM Controllers with Integrated Power MOSFET

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 V_RM of secondary rectification
diodes low, the circuit efficiency can be improved by
low V_F)
● 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
Lineup
● Electrical Characteristics
f_OSC(AVG)(typ.) = 65 kHz
V_DSS(min.) = 650 V
Products
STR3A45×
STR3A45×D
Not to Scale
OVP, TSD Operation
Latched shutdown
Auto-restart
● MOSFET ON Resistance and Output Power, P_OUT*
P_OUT
P_OUT
Products
R_DS(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.
1
Sept. 18, 2015
http://www.sanken-ele.co.jp/en/
© SANKEN ELECTRIC CO.,LTD. 2014