STR-A6153E Datasheet, PDF (1/7 Pages) Allegro MicroSystems – Universal-Input/20 W Flyback Switching Regulator

SwRitecghuinlagtors
ABSOLUTE MAXIMUM RATINGS
at T_A = +25°C
Control Supply Voltage, V_CC . . . . 35 V
Drain-Source Voltage, V_DSS . . . . . . 650 V
Drain Switching Current, I_D . . . . 3.4 A*
Peak Drain Switching Current,
I_DM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.8 A
Single-Pulse Avalanche Energy,
E_AS . . . . . . . . . . . . . . . . . . . 136 mJ
Start-Up-Pin Voltage Range,
V_startup . . . . . . . . . –0.3 V to +600 V
OCP Voltage Range,
V_OCP . . . . . . . . . . . . –0.5 V to +6 V
FB/OLP Voltage Range,
V_FB/OLP . . . . . . . . . . –0.5 V to +10 V
Package Power Dissipation, P_D
control (V_CC × I_CC(ON)) . . . . . 0.46 W
MOSFET (V_DSS × I_D) . . . . . . 1.81 W
total . . . . . . . . . . . . . . . . . . . 2.27 W
MOSFET Channel Temp., T_J . +150°C
Internal Frame Temp., T_F . . . . +125°C
Operating Temperature Range,
T_A . . . . . . . . . . . -20°C to +125°C†
Storage Temperature Range,
T_S . . . . . . . . . . . . -40°C to +125°C
* Drain switching current is limited by tem-
perature (page 2) and safe operating area
(page 4).
†For the availability of parts meeting -40°C
requirements, contact Allegro’s Sales Represen-
tative.
STR-A6153E
Universal-Input/20 W
Flyback Switching Regulator
The STR-A6153E is a PRC topology (fixed off-time) regulator
specifically designed to satisfy the requirements for increased integration
and reliability in flyback converters. It incorporates a primary control
and drive circuit with avalanche-rated power MOSFET. The STR-
A6153E features high switching current and avalanche-energy ratings
and low on-resistance.
Covering the power range from below 24 watts for a 230 VAC
input, or 20 watts for a universal (85 to 264 VAC) input, this device can
be used in a range of applications, from DVD and VCR players to ac
adapters for cellular phones and digital cameras. An auto-standby
function 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 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. The STR-A6153E is provided in an
8-pin mini-DIP plastic package.
FEATURES AND BENEFITS
■ Rugged 650 V Avalanche-Rated MOSFET
Simplified Surge Absorption
No V_DSS Derating Required
■ r 1.9 Ω _DS(on)
■ Two Operational Modes by Automatic Switching:
PRC Mode for Normal Operation
Burst Mode for Stand-By Operation or Light Loads
■ Built-In Leading Edge Blanking
■ Low Start-Up Current
Start-Up Circuit Disabled in Operation
■ Low Operating Current (1.5 mA typ)
■ Automatic Burst Stand-By (intermittent operation)
Input Power <0.1 W at No Load
— continued
Always order by complete part number, e.g., STR-A6153E .
Sanken Power Devices
from Allegro MicroSystems