STR-X6757 Просмотр технического описания (PDF) - Allegro MicroSystems
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STR-X6757 Datasheet PDF : 11 Pages
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STR-X6757
Off-Line Quasi-Resonant Switching Regulators
Description (continued)
The soft-start mode minimizes surge voltage and reduces power stress
to the MOSFET and to the secondary rectifying diodes during the
start-up sequence. Various protections such as overvoltage, overload,
overcurrent, maximum on-time protections and avalanche-energy-
guaranteed MOSFET secure good system-level reliability.
Applications include the following:
▪ Set Top Box
▪ LCD PC monitor, LCD TV
▪ Printer, Scanner
▪ SMPS power supplies
Selection Guide
Part Number
STR-X6757
Package
TO-3P
Absolute Maximum Ratings at TA = 25°C
Parameter
Symbol
Conditions
Drain Current1
Maximum Switching Current2
Single Pulse Avalanche Energy3
Input Voltage for Controller (MIC)
IDpeak
IDmax
EAS
VCC
Single pulse
TA = –20°C to 125°C
Single pulse, VDD = 30 V, L = 50 mH, ILpeak = 3.53 A
SS/OLP Terminal Voltage
VSSOLP
FB Terminal Inflow Current
IFB
FB Terminal Voltage
OCP/BD Terminal Voltage
VFB IFB within the limits of IFB
VOCPBD
MOSFET Power Dissipation4
PD1
With infinite heatsink
Without heatsink
Controller (MIC) Power Dissipation
Operating Internal Leadframe Temperature
Operating Ambient Temperature
PD2
VCC × ICC
TF Recommended operation temperature, see cautions
TOP
Storage Temperature
Tstg
Channel Temperature
Tch
1Refer to MOSFET ASO curve
2IDMAX is the drain current determined by the drive voltage of the IC and the threshold voltage, Vth, of the MOSFET
3Refer to Avalanche Energy Derating curve
4Refer to MOSFET Ta-PD1 curve
Rating
Unit
18
A
18
A
326
mJ
35
V
–0.5 to 6.0 V
10
mA
–0.5 to 9.0 V
–1.5 to 5.0 V
44
W
2.8
W
0.8
W
–20 to 125 °C
–20 to 125 °C
–40 to 125 °C
150
°C
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, TA, of 25°C, unless otherwise stated.
Allegro MicroSystems, Inc.
2
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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