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STR-A6169
Universal-Input/5 W
Flyback Switching Regulator
The STR-A6169 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 800 V power MOSFET.
Covering the power range from below 8 watts for a 230 VAC input,
or 5 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. Devices with an increased output power
rating are the STR-A6151 and STR-A6159.
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-A6169 is provided in an 8-
pin mini-DIP plastic package.
FEATURES
AND
BENEFITS
鈻?/div>
Rugged 800 V Avalanche-Rated MOSFET
Simplified Surge Absorption
No V
DSS
Derating Required
鈻?/div>
19.2
鈩?/div>
r
DS(on)
鈻?/div>
Two Operational Modes by Automatic Switching:
PRC Mode for Normal Operation
Burst Mode for Stand-By Operation or Light Loads
鈻?/div>
Built-In Leading Edge Blanking
鈻?/div>
Low Start-Up Current
Start-Up Circuit Disabled in Operation
鈻?/div>
Low Operating Current (1.5 mA typ)
鈻?/div>
Automatic Burst Stand-By (intermittent operation)
Input Power <0.1 W at No Load
鈥?continued
Always order by complete part number, e.g.,
STR-A6169
.
Data Sheet
28102.24
ABSOLUTE MAXIMUM RATINGS
at T
A
= +25擄C
Control Supply Voltage, V
CC
. . . .
35 V
Drain-Source Voltage, V
DSS . . . . . .
800 V
Drain Switching Current, I
D
. . . .
1.2 A*
Peak Drain Switching Current,
I
DM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 A
Single-Pulse Avalanche Energy,
E
AS
. . . . . . . . . . . . . . . . . . . . .
7 mJ
Start-Up Pin Voltage Range,
V
startup
. . . . . . . . .
鈥?.3 V to +600 V
OCP Voltage Range,
V
OCP
. . . . . . . . . . . .
鈥?.5 V to +6 V
FB/OLP Voltage Range,
V
FB/OLP
. . . . . . . . . .
鈥?.5 V to +10 V
Package Power Dissipation, P
D
control (V
CC
脳 I
CC(ON)
) . . . . .
0.15 W
MOSFET (V
DSS
脳 I
D
) . . . . . .
1.35 W
total . . . . . . . . . . . . . . . . . . . .
1.5 W
MOSFET Channel Temp., T
J
.
+150擄C
Internal Frame Temp., T
F
. . . .
+125擄C
Operating Temperature Range,
T
A
. . . . . . . . . . .
-20擄C to +125擄C鈥?/div>
Storage Temperature Range,
T
S
. . . . . . . . . . . .
-40擄C to +125擄C
* Drain switching current is limited by temperature
(page 2) and safe operating area (page 4).
鈥燜or the availability of parts meeting -40擄C
requirements, contact Allegro鈥檚 Sales Represen-
tative.
Sanken Power Devices
from Allegro MicroSystems
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