STR3A151 Datasheet, PDF (1/14 Pages) Sanken electric – PWM Off-Line Switching Regulator ICs

STR3A151, STR3A152, STR3A153,
STR3A154, STR3A155
PWM Off-Line Switching Regulator ICs
Features and Benefits
• Current mode PWM control
• Built-in Random Switching function: reduces
EMI noise, simplifies EMI filters, and cuts cost by
external part reduction
• Built-in Slope Compensation function: avoids
subharmonic oscillation
• Built-in Leading Edge Blanking (LEB) function
• Auto Standby function:
▫ Input power, P_IN < 10 mW at no load with low power
consumption shunt regulator
▫ Normal load operation: PWM switching
▫ Light load operation: Standby mode (Burst oscillation)
Continued on the next page…
Package: DIP8
Not to scale
Description
STR3A100 series are power ICs for switching power supplies,
incorporating a power MOSFET and a current mode PWM
controller IC in one package.
Including a startup circuit and a standby function in the
controller, the product achieves low power consumption, low
standby power, and high cost-effectiveness in power supply
systems, while reducing external components.
The products are provided in an industry standard DIP8
package.
Applications
Switching power supplies for electronic devices such as:
• Stand-by power supply for LCD/PDP television,
desktop PC, multi-function printer, audio equipment,
and so forth
• Small switched-mode power supply (SMPS) for printer,
BD/DVD player, set-top box, and so forth
• Auxiliary power supply for air conditioner, refrigerator,
washer, dishwasher, and so forth
D1
VAC
C1
Typical Application
CRD Snubber Circuit
C9
D4
T1
C5
R3
P
D3
S
C6
C, RC
Damper
Snubber
Circuit
8 76 5
D/ST D/ST DN/SCT D/ST
C4
U1
STR3A100
S/OCP VCC GND FB/OLP
1234
D2 R2
C2
D
R_OCP
C3
PC1
L2
R9
PC1 ^R4
R8
R5
C7 R6
U2
R7
VOUT
C8
GND
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
July 20, 2012