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STR-S6411 AND STR-S6411F
OFF-LINE SWITCHING REGULATORS – WITH POWER MOSFET OUTPUT
DRAIN 1
LATCH OSC.
Data Sheet 28101.1
SOURCE
2
GATE POWER GROUND SOFT START OVER-CURRENT PROTECTION
V IN
3
PWM +
4
+
These devices are specifically designed to meet the requirements for increased integration and reliability in off-line flyback (STR-S6411) and forward (STR-S6411F) converters operating in a fixed-frequency PWM mode. Each device incorporates the primary control and drive circuits with an avalanche-rated high-voltage power MOSFET. Crucial system parameters such as switching frequency and maximum duty cycle are fixed during manufacture. The STR-S6411 and STR-S6411F 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, undervoltage 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.
Dwg. PK-003
5
6
7
UVLO
REF.
SIGNAL GROUND FDBK
8
9
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, VIN ............................ 35 V Drain-Source Voltage, VDS ............... 800 V Drain Current, ID continuous ..................................... ±5 A single pulse, tw ≤1 ms .................. ±20 A Avalanche Energy, EA single pulse ............................... 400 mJ Gate-Source Voltage, VGS ................ ±20 V Gate-Drive Current Range, IG ................................. -0.7 A to +1.5 A Over-Current Protection Voltage Range, VOCP ............................. -0.3 V to +4.0 V Insulation RMS Voltage, VWM(RMS) ..................................... 2000 V Package Power Dissipation, PD ........................................ See Graph FET Channel Temperature, TJ ...... +150 °C Internal Frame Temperature, TF ... +125 °C Operating Temperature Range, TA ............................... -20°C to +125°C Storage Temperature Range, www.DataSheet4U.com T ............................. -30°C to +125°C stg
I D
C S
N O
F
I T
U N
FEATURES
D E
R P
N E
U Y D L O
N O
T C
E C
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
R O
R
F E
R E
s Internal Under-Voltage Lockout and Thermal Shutdown s Low External Component Count s Over-Molded SIP with Isolated Heat Spreader
—
Always order by complete part number: STR-S6411 or STR-S6411F .
™
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STR-S6411 AND STR-S6411F OFF-LINE SWITCHING REGULATORS
FUNCTIONAL BLOCK DIAGRAM
V IN 7 FDBK 9 GATE 3
UVLO
REF.
1
DRAIN
Rton PWM + Rtoff OSC.
R LATCH S
Q
2
SOURCE
+ 0.2 V
6
OVER-CURRENT PROTECTION
5 SOFT START
8 SIGNAL GROUND
4 POWER GROUND
Dwg. FK-003
ALLOWABLE PACKAGE POWER DISSIPATION
62 W 60
ALLOWABLE PACKAGE POWER DISSIPATION in WATTS
MAXIMUM SAFE OPERATING AREA
100
MOUNTING SURFACE TEMPERATURE
30
40
RECOMMENDED MAX. FRAME TEMP. = +100°C
DRAIN CURRENT in AMPERES
10
LIMITED BY r DS(on)
3.0
LIMITED BY FRAME TEMP. = +125°C MAX. 20
1.0 NO HEAT SINK NATURAL COOLING TA = +25°C 0.3
FREE AIR 3.2 W 0 20 60 100 TEMPERATURE in °C 140
Dwg. GK-003
0.1 3.0 10 30 100 300 1000
Dwg. GK-004-1
DRAIN-TO-SOURCE VOLTAGE in VOLTS
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115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1994 Allegro MicroSystems, Inc.
™
LIMITED BY V DS max
t w = 1m t w = sS 10 ING ms LE SIN PU GL LS EP E UL SE
t w = 0.1 ms SIN GL EP UL SE
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STR-S6411 AND STR-S6411F OFF-LINE SWITCHING REGULATORS
600
ALLOWABLE AVALANCHE ENERGY in mJ
500 SINGLE PULSE DRAIN CURRENT = 5 A SUPPLY VOLTAGE = 50 V
400
ALLOWABLE AVALANCHE ENERGY
300
200
100
0 0 60 100 20 40 80 120 STARTING CHANNEL TEMPERATURE in °C 140 160
Dwg. GK-009-1
ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 17 V, voltage measurements are referenced to
Signal Ground (pin 8) (unless otherwise noted). Limits Characteristic On-State Voltage Under-Voltage Lockout FET Leakage Current FET ON Resistance Forward Transconductance FET Input Capacitance Propagation Delay Time Oscillator Frequency Maximum ON Time Over-Current Threshold OCP Current Feedback Current Soft Start Threshold Voltage Soft Start Current Power Ground Current Supply Current Insulation RMS Voltage Thermal Resistance Symbol V INT V INQ IDSS rDS(on) gfs Ciss tphl tplh fosc ton VOCP(th) IOCP IFDBK V SS(th) ISS IPG IIN(ON) IIN(OFF) VWM(RMS) RθJM VSS = 0 V tw = 200 ns Operating Start up, VIN = 12 V All terminals simultaneous reference metal plate against backside FET channel to mounting surface STR-S6411 STR-S6411F Test Conditio.