STR-A6259H Datasheet, PDF (1/13 Pages) Allegro MicroSystems – Universal-Input 13 W 100 kHz Flyback Switching Regulators

Sanken Power Devices
from Allegro MicroSystems
SwRitecghuilnagtors
Approximate Scale 1:1
Package DIP-8
FEATURES AND BENEFITS
100 kHz PWM with ±5% frequency jittering for EMI noise
filtering cost reduction
Rugged 650 V avalanche-rated MOSFET:
• Simplified surge absorption
• No V_DSS derating required
Low R_DS(on) : 6 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
Auto-burst stand-by (intermittent operation) input power
<0.1 W at no load
Built-in constant-voltage/constant current (CV/CC)
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)
STR-A6259H
Universal-Input 13 W 100 kHz
Flyback Switching Regulators
The STR-A6259H is a 100 kHz PWM topology (with ±5% freq-
uency jittering for minimum EMI) regulator specifically designed
to satisfy the requirements for increased integration and reliability
in flyback converters. It incorporates a primary control and drive
circuit with an avalanche-rated power MOSFET.
Covering the power range from below 17 watts for a
230 VAC input, or to 13 watts for a universal (85 to 264 VAC)
input, this device 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 func-
tion reduces power consumption at light load, while multiple
protections, including the avalanche-energy guaranteed MOSFET,
provide high reliability of system design.
Cycle-by-cycle current limiting, undervoltage lockout with
hysteresis, 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.
It is provided in an 8-pin mini-DIP plastic package with pin
6 removed. The leadframe plating is pure Sb, and the package
complies with RoHS.
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and Always order by complete part number, e.g.: STR-A6259H
an ambient temperature of +25°C, unless otherwise stated.
Datasheet 28103.44-6b