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| STR-A6000M Datasheet, PDF (1/13 Pages) Allegro MicroSystems – PWM Off-Line Switching Regulator ICs | |||
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STR-A6000M Series
PWM Off-Line Switching Regulator ICs
Features and Benefits
⪠Current mode PWM control
⪠Brown-In and Brown-Out function: auto-restart, prevents
excess input current and heat rise at low input voltage
⪠Auto Standby function: improves efficiency by Burst
mode operation in light load
â« Normal load operation: PWM mode
â« Light load operation: Burst mode
⪠No load power consumption < 25 mW
⪠Operating frequency, fOSC(AVG)(typ) = 67 kHz
⪠Random Switching function: reduces EMI noise, and
simplifies EMI filters
⪠Slope Compensation function: avoids subharmonic
oscillation
⪠Leading Edge Blanking function
Continued on the next pageâ¦
Package: DIP8
Not to scale
Description
The STR-A6051M, STR-A6052M, STR-A6053M, and
STR-A6079M are power ICs for switching power supplies,
incorporating a power MOSFET and a current mode PWM
controller IC in one package.
To achieve low power consumption, these products include
a startup circuit and a standby function in the controller. The
switching modes are automatically changed according to load
conditions: in normal operation, PWM mode, and in light load
conditions, burst mode. The rich set of protection features
helps to realize low component counts, and high performance-
to-cost power supply.
Applications:
Switching power supplies for electronic devices such as:
⢠Battery charger
⢠Standby power supply
⢠Small switch-mode power supply (SMPS)
⢠Auxiliary power supply for controller
BR1
VAC
C1
Cï¼CRï¼
Dumper snubber
Typical Application Circuit
RA
RB
C4
RC
CRD clamp snubber
T1
D51
C5
R1
P
D1
C51
S
87
5
D/ST D/ST NC VCC
U1
STR-A6000
S/OCP BR GND FB/OLP
123 4
D2 R2
C2
D
PC 1
C10 C3
ROCP
C9
L51
R54
PC1 R51
R55
R52
C52 R53
U51
R56
VOUT
C53
GND
STR-A6000HD-DS
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
January 8, 2013
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