900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






Allegro MicroSystems

STRX6769 Datasheet Preview

STRX6769 Datasheet

Off-Line Quasi-Resonant Switching Regulators

No Preview Available !

STR-X6769
www.DataSheet4U.com
Off-Line Quasi-Resonant Switching Regulators
Features and Benefits
Quasi-resonant topology IC Low EMI noise and soft
switching
Bottom-skip mode Improved system efficiency over
the entire output load by avoiding increase of switching
frequency
Auto-Standby mode Lowers input power at very light
output load condition
Avalanche-guaranteed MOSFET Improves system-level
reliability and does not require VDSS derating
800 VDSS / 0.66 Ω RDS(on)
Various protections Improved system-level reliability
Pulse-by-pulse drain overcurrent limiting
Overvoltage Protection (bias winding voltage sensing),
with latch
Overload Protection with latch
Maximum on-time limit
Package: 7-Pin TO-3P
Description
The STR-X6769 is a quasi-resonant topology IC designed for
SMPS applications. It shows lower EMI noise characteristics
than conventional PWM solutions, especially at greater than
2 MHz. It also provides a soft-switching mode to turn on the
internal MOSFET at close to zero voltage (VDS bottom point)
by use of the resonant characteristic of primary inductance
and a resonant capacitor.
The package is a fully molded TO-3P, which contains the
controller chip (MIC) and MOSFET, enabling output power
up to 310 W at 230 VAC and 210 W at universal input. The
bottom-skip mode skips the first bottom of VDS and turns on the
MOSFET at the second bottom point, to minimize an increase
of operating frequency at light output load, improving system-
level efficiency over the entire load range.
There are two standby functions available to reduce the input
power under very light load conditions.The first isAuto-Standby
mode, which is internally triggered by periodic sensing, and
the other is a manual standby mode, which is executed by
clamping the secondary output. In general applications, the
manual standby mode reduces the input power further compared
to Auto-Standby mode.
Not to scale
Continued on the next page…
Typical Application
28103.30-12




Allegro MicroSystems

STRX6769 Datasheet Preview

STRX6769 Datasheet

Off-Line Quasi-Resonant Switching Regulators

No Preview Available !

STR-X6769
Off-Line Quasi-Resonant Switchiwnwgw.DRataeShgeeut4lU.acotmors
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-X6769
Package
TO-3P
Absolute Maximum Ratings at TA = 25°C
Parameter
Symbol
Conditions
Drain Current1
Maximum Switching Current2
Single Pulse Avalanche Energy3
IDpeak
IDmax
EAS
Single pulse
TA = –20°C to 125°C
Single pulse, VDD = 30 V, L = 50 mH, ILpeak = 3.9 A
Input Voltage for Controller (MIC)
VCC
SS/OLP Terminal Voltage
VSSOLP
FB Terminal Inflow Current
FB Terminal Voltage
IFB
VFB IFB within the limits of IFB
OCP/BD Terminal Voltage
VOCPBD
MOSFET Power Dissipation4
PD1
With infinite heatsink
Without heatsink
Controller (MIC) Power Dissipation
PD2 VCC × ICC
Operating Internal Leadframe Temperature
TF Recommended operation temperature, see cautions
Operating Ambient Temperature
TOP
Storage Temperature
Channel Temperature
1Refer to MOSFET ASO curve
Tstg
Tch
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
22
22
395
35
–0.5 to 6.0
10
–0.5 to 9.0
–1.5 to 5.0
46
2.8
0.8
–20 to 125
–20 to 125
–40 to 125
150
Unit
A
A
mJ
V
V
mA
V
V
W
W
W
°C
°C
°C
°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.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2


Part Number STRX6769
Description Off-Line Quasi-Resonant Switching Regulators
Maker Allegro MicroSystems
Total Page 11 Pages
PDF Download

STRX6769 Datasheet PDF

View PDF for Mobile








Similar Datasheet

1 STRX6768N Off-Line Quasi-Resonant Switching Regulators
Sanken
2 STRX6769 Off-Line Quasi-Resonant Switching Regulators
Allegro MicroSystems
3 STRX6769B Power IC for Quasi-Resonant Type Switching Power Supply
Sanken





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy