STR-S6401 Datasheet, PDF (1/8 Pages) Allegro MicroSystems – OFF-LINE SWITCHING REGULATORS WITH POWER MOSFET OUTPUT

STR-S6401 AND
STR-S6401F
OFF-LINE SWITCHING REGULATORS
– WITH POWER MOSFET OUTPUT
These devices are specifically designed to meet the requirements
for increased integration and reliability in off-line flyback (STR-S6401)
DRAIN 1
and forward (STR-S6401F) converters operating in a fixed-frequency
SOURCE 2
GATE ₃
T _POWER
GROUND ⁴
C _SOFT
START ⁵
U OVER-CURRENT
PROTECTION
6
D Y _{VIN 7}
O ^{L SIGNAL}
GROUND
8
R ^{N FDBK 9}
LATCH
OSC.
PWM
UVLO
REF.
P ^O _Dwg.PK-003
D _{CE ABSOLUTE MAXIMUM RATINGS}
E _{N Supply Voltage, VIN ............................ 35 V}
U ^{Drain-Source Voltage, V}_DS ^{............... 500 V}
E _{Drain Current, ID}
IN ^{R continuous ................................... ±10 A}
single pulse, t_w ≤1 ms .................. ±40 A
T ^{E Avalanche Energy, E}A
F single pulse ............................... 500 mJ
N _E Gate-Source Voltage, V_GS ................ ±20 V
Gate-Drive Current Range,
O R _{IG ................................. -0.7 A to +1.5 A}
Over-Current Protection Voltage Range,
C _{R VOCP ............................. -0.3 V to +4.0 V}
S _{Insulation RMS Voltage,}
I ^O _{VWM(RMS) ..................................... 2000 V}
D ^{F Package Power Dissipation,}
P_D ........................................ See Graph
— ^{FET Channel Temperature, TJ ...... +150°C}
PWM mode. Each device incorporates the primary control and drive
circuits with an avalanche-rated power MOSFET. Crucial system
parameters such as switching frequency and maximum duty cycle are
fixed during manufacture. The STR-S6401 and STR-S6401F differ only
in their maximum duty cycle. Control circuit decoupling and layout are
optimized within each device.
Cycle-by-cycle and average-current limiting, soft start, under-
voltage lockout with hysteresis, and thermal shutdown protect the
device during all normal and overload conditions. The performance and
reliability of these devices, and their variable-frequency counterparts,
has been proven in substantial volume production.
The requirements of high dielectric isolation and low transient
thermal impedance and steady-state thermal resistance are satisfied in
an over-molded, 9-pin single in-line power package. Similar off-line
switching regulators, with output ratings to 800 V at 5 A, are also
available.
FEATURES
s PWM Flyback Conversion or Forward Conversion
s Output Power to 250 W
s Pulse-by-Pulse Current Limiting
s Fixed-Frequency 100 kHz PWM
s Avalanche-Rated Power MOSFET Switch
s Soft Start
s Internal Under-Voltage Lockout and Thermal Shutdown
s Low External Component Count
s Over-Molded SIP with Isolated Heat Spreader
Internal Frame Temperature, T_F ... +125°C
Operating Temperature Range,
T_A ............................... -20°C to +125°C
Storage Temperature Range,
Always order by complete part number:
T_stg ............................. -30°C to +125°C
STR-S6401 or STR-S6401F .
™