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PDF STR-S6525 Data sheet ( Hoja de datos )
| Número de pieza | STR-S6525 | |
| Descripción | OFF-LINE SWITCHING REGULATOR | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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STR-S6525
OFF-LINE SWITCHING REGULATOR
– WITH POWER MOSFET OUTPUT
The STR-S6525 is specifically designed to meet the requirement
for increased integration and reliability in off-line flyback converters
DRAIN 1
operating in a constant OFF-time mode. The device incorporates the
SOURCE 2
COMMON 3
TSYNC 4
CVIN 5
UFDBK 6
SOFT START 7
D YFAULT-LATCH
O LTRIGGER
8
OVER-CURRENT
PROTECTION
9
OSC.
FAULT
LATCH
RS
FAULT
UVLO
REF.
PR ONDwg.PK-002-1
ABSOLUTE MAXIMUM RATINGS
D ESupply Voltage, VIN ........................... 35 V
E CDrain-Source Voltage, VDS .............. 600 V
NContinuous Drain Current, ID ............ 6.0 A
U E1 ms Single-Pulse Drain Current,
IN RIDM ................................................. 24 A
Single-Pulse Avalanche Energy,
T EEA .............................................. 400 mJ
FFeedback Input Current, IFDBK ........ 20 mA
N EFault-Latch Trig. Input Current, IFL 1.0 mA
dc ≤ 25%, IFLM ........................... -50 mA
O RSoft-Start Output Current, ISS ....... -3.0 mA
C ROver-Current Protection Voltage,
SVOCP ............................................. 3.5 V
I OInsulation Voltage,VWM(RMS) ........... 2000 V
D FPackage Power Diss., PD ........ See Graph
FET Junction Temperature, TJ ...... +150°C
—Internal Frame Temperature, TF ... +125°C
primary control and drive circuit with a discrete avalanche-rated high-
voltage power MOSFET.
Crucial system parameters such as maximum ON time and OFF
time are fixed during manufacture. Local control circuit decoupling and
layout are optimized within the device.
Cycle-by-cycle current limiting, soft start, under-voltage lock-out
with hysteresis, over-voltage protection, and thermal shutdown protect
the device during all normal and overload conditions. Over-voltage
protection, thermal shutdown, or an external fault signal be latched.
The dual requirements of dielectric isolation and low transient thermal
impedance and steady-state thermal resistance are satisfied in an over-
molded single-in-line power package.
Proven in substantial volumes, this device and its fixed-frequency
counterparts represents a significant advance in off-line SMPS reliability
growth and integration.
FEATURES
s Constant OFF-Time Converter Operating Mode
s Avalanche-Rated Power MOSFET Switch
s Pulse-by-Pulse Current Limiting
s Latched Over-Voltage and Thermal Protection
s Maximum ON Time and OFF Time Set During Manufacture
s Internal Under-Voltage Lockout with Hysteresis
s Over-Molded SIP with Integral Isolated Heat Spreader
Operating Temperature Range,
TA ............................... -20°C to +125°C
s External Synchronization Capability
Storage Temperature Range,
Tstg ............................. -30°C to +125°C
Always order by complete part number: STR-S6525 .
™
1 page  
STR-S6525
OFF-LINE
SWITCHING REGULATOR
TYPICAL APPLICATION
WARNING: lethal potentials are present. See text.
7
+
8
5
STR-S6525
R
SQ
1
2
+
64
150 Ω
+9
3
TURN ON
+
5
TO PIN 6
TO PIN 8
+ OUTPUT
VOLTAGE
SENSE
– OUTPUT
Dwg. EK-001
APPLICATIONS INFORMATION
WARNING — These devices are designed to be operated at lethal voltages and energy levels. Circuit
designs that embody these components must conform with applicable safety requirements. Precau-
tions must be taken to prevent accidental contact with power-line potentials. Do not connect
grounded test equipment.
The use of an isolation transformer is recommended during circuit development and breadboarding.
The power MOSFET outputs of these devices are similar to the International Rectifier type IRFBC40. These devices
feature an excellent combination of fast switching, ruggedized device design, low on-resistance, and cost effectiveness.
Recommended mounting hardware torque:
4.34 – 5.79 lbf•ft (6 – 8 kg•cm or 0.588 – 0.784 Nm).
Recommended metal-oxide-filled, alkyl-degenerated oil base, silicone grease:
Dow Corning 340, or equivalent
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet STR-S6525.PDF ] | |
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