str-a6251d Allegro MicroSystems, Inc., str-a6251d Datasheet - Page 2

• Manufacturer Part Number: str-a6251d
• Description: Universal-input / 15 Or 20 W Flyback Switching Regulators | Str-a6251d And Str-a6252d
• Manufacturer: Allegro MicroSystems, Inc.

Features and Benefits (continued)
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2
Selection Guide
ABSOLUTE MAXIMUM RATINGSat T
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, T
*Contact Allegro for additional packing options
Control Supply Voltage
Drain-Source Voltage
Drain Switching Current*
Peak Drain Switching Current
Single-Pulse Avalanche Energy
S/OCP Voltage Range
FB/CC/OLP Voltage Range
FM Voltage Range
Package Power Dissipation
MOSFET Channel Temperature
Internal Frame Temperature
Storage Temperature Range
* Drain switching current is limited by temperature (page 2) and safe operating area (page 4).
Automatic Burst Stand-By (intermittent operation)
Input Power <0.1 W at No Load
Auto-Bias Function
Stable Burst Operation Without Generating Interference
Internal Off-Timer Circuit
Built-In Constant-Voltage/Constant Current
Multiple Protections:
Pulse-by-Pulse Overcurrent Protection (OCP)
Overload Protection (OLP) with Auto Restart
Latching Overvoltage Protection (OVP)
Undervoltage Lockout (UVLO) with Hysteresis
Latching Thermal Shutdown (TSD)
Molded Small-Size 8-Pin Package
For Low-Height SMPS
STR-A6251D and STR-A6252D
Universal-Input/15 W 50 kHz
Flyback Switching Regulators
Part Number
STR-A6251D
STR-A6252D
Characteristic
A
, of 25°C, unless oth er wise stated.
Symbol
V
V
V
FB/OLP
V
E
V
I
P
T
T
T
DSS
I
DM
OCP
CC
FM
D
AS
S
D
J
F
Package
7-pin DIP
7-pin DIP
A
STR-A6251D
STR-A6252D
STR-A6251D
STR-A6252D
STR-A6251D
STR-A6252D
Control (V
MOSFET (V
Total
= +25°C
CC
DSS
× I
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036
CC(ON)
× I
D
)
)
Notes
conditions. Overvoltage protection and thermal shutdown are
latched after a short delay. The latch may be reset by cycling the
input supply. Low start-up current and a low-power Standby mode
selected from the secondary circuit completes a comprehensive
suite of features. Both devices are provided in an 8-pin mini-DIP
plastic package with pin 6 removed.
Description (continued)
R
3.95
DS(on)
(Ω)
2.8
–40 to 125
–0.3 to 12
–0.3 to 6
–0.3 to 6
Rating
0.15
1.35
650
123
150
125
2.5
3.0
2.5
3.0
1.5
36
72
Units
mJ
mJ
°C
°C
°C
W
W
W
V
V
A
A
A
A
V
V
V