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STR3A154

Description
SWITCHING REGULATOR
Categorysemiconductor    Analog mixed-signal IC   
File Size262KB,14 Pages
ManufacturerAllegro
Websitehttp://www.allegromicro.com/
Download Datasheet Parametric Compare View All

STR3A154 Overview

SWITCHING REGULATOR

STR3A154 Parametric

Parameter NameAttribute value
stateActive
Analog IC other typesSWITCHING REGULATOR
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)
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
Continued on the next page…
Package: DIP8
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
Not to scale
Typical Application
C9
CRD Snubber Circuit
D1
VAC
C5
C1
D3
R3
P
S
PC1
R5
C6
C7
8
7
6
5
D/ST D/ST D/ST D/ST
NC
T1
D4
L2
VOUT
R9
R4
R8
C8
R6
R7
D2
R2
U2
C4
U1
STR3A100
C2
D
GND
S/OCP VCC GND FB/OLP
C, RC
Damper
Snubber
Circuit
R
OCP
1
2
3
4
C3
PC1
STR3A150-DS
SANKEN ELECTRIC CO., LTD.
July 20, 2012

STR3A154 Related Products

STR3A154 STR3A153 STR3A155 STR3A151 STR3A152
Description SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR SWITCHING REGULATOR
state Active Active Active Active Active
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