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PDF STR-A6252 Data sheet ( Hoja de datos )
| Número de pieza | STR-A6252 | |
| Descripción | (STR-A6251/-A6252) Universal-Input/15 W 50 kHz Flyback Switching Regulators | |
| Fabricantes | Allegro MicroSystems | |
| Logotipo |  |
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 1. Flyback Switching Regulator - Allegro  Hay una vista previa y un enlace de descarga de STR-A6252 (archivo pdf) en la parte inferior de esta página. Total 7 Páginas | ||
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ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Control Supply Voltage, VCC . . . . 36 V
Drain-Source Voltage, VDSS . . . . . . 650 V
Drain Switching Current, ID
STR-A6251 . . . . . . . . . . . . . . 2.5 A*
STR-A6252 . . . . . . . . . . . . . . 3.0 A*
Peak Drain Switching Current, IDM
STR-A6251 . . . . . . . . . . . . . . . 2.5 A
STR-A6252 . . . . . . . . . . . . . . . 3.0 A
Single-Pulse Avalanche Energy, EAS
STR-A6251 . . . . . . . . . . . . . . 72 mJ
STR-A6252 . . . . . . . . . . . . . 123 mJ
S/OCP Voltage Range,
VOCP . . . . . . . . . . . . –0.3 V to +6 V
FB/CC/OLP Voltage Range,
VFB/OLP . . . . . . . . . . –0.3 V to +12 V
FM Voltage Range,
VFM . . . . . . . . . . . . . –0.3 V to +6 V
Package Power Dissipation, PD
control (VCC × ICC(ON)) . . . . . 0.15 W
MOSFET (VDSS × ID) . . . . . . 1.35 W
total . . . . . . . . . . . . . . . . . . . . 1.5 W
MOSFET Channel Temp., TJ . +150°C
Internal Frame Temp., TF . . . . +125°C
Storage Temperature Range,
TS . . . . . . . . . . . . -40°C to +125°C
* Drain switching current is limited by tem-
perature (page 2) and safe operating area
(page 4).
STR-A6251 AND
STR-A6252
Universal-Input/15 W 50 kHz
Flyback Switching Regulators
The STR-A6251 and STR-A6252 are 50 kHz PWM topology (with
±5% frequency jittering for minimum EMI) regulators specifically
designed to satisfy the requirements for increased integration and
reliability in flyback converters. They incorporate a primary control and
drive circuit with avalanche-rated power MOSFETs. The STR-A6252
features higher allowable switching current and lower on-resistance.
The STR-A6251 is also available for 67 kHz operation.
Covering the power range from below 21 watts or 24 watts for a
230 VAC input, or to 15 or 20 watts for a universal (85 to 264 VAC)
input, these devices can be used in a wide range of applications, from
DVD players and VCR player/recorders to ac adapters for cellular
phones and digital cameras. An auto-burst standby function reduces
power consumption at light load, while multiple protections, including
the avalanche-energy guaranteed MOSFET, provide high reliability of
system design.
wCwwy.DcatalSeh-eebt4yU.-cocmycle current limiting, undervoltage lockout with hyster-
esis, overvoltage protection, and thermal shutdown protect the power
supply during the normal overload and fault 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.
FEATURES AND BENEFITS
■ 50 kHz PWM with ±5% Frequency Jittering
Cost Reduction of EMI Noise Filtering
■ Rugged 650 V Avalanche-Rated MOSFET
Simplified Surge Absorption
No VDSS Derating Required
■ Choice of rDS(on) (2.8 Ω or 3.95 Ω maximum)
■ Auto-Burst Mode for Stand-By Operation or Light Loads
Less Transformer Audible Noise
■ Built-In Leading Edge Blanking
■ Soft Start and Low Start-Up Current
Start-Up Circuit Disabled in Operation
■ Low Operating Current (4 mA max)
continued
Always order by complete part number, e.g., STR-A6251 .
Sanken Power Devices
from Allegro MicroSystems
1 page  
SwRitecghuinlagtors
STR-A6251 and STR-A6252
Universal-Input/15 W 50 kHz
Flyback Switching Regulators
MOSFET TYPICAL CHARACTERISTICS (cont’d)
STR-A6251
STR-A6252
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. Precautions 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.
www.allegromicro.com
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet STR-A6252.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| STR-A6251 | (STR-A6251/-A6252) Universal-Input/15 W 50 kHz Flyback Switching Regulators | Allegro MicroSystems |
| STR-A6251M | Universal-Input/15 W 67 kHz Flyback Switching Regulator | Allegro MicroSystems |
| STR-A6252 | (STR-A6251/-A6252) Universal-Input/15 W 50 kHz Flyback Switching Regulators | Allegro MicroSystems |
| STR-A6252M | Universal-Input 20 W 67 kHz Flyback Switching Regulators |  Sanken Electric |
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