STR-F6624 Datasheet PDF - Allegro Microsystems

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STR-F6624
Allegro Microsystems

Part Number STR-F6624
Description Off-Line Quasi-Resonant Flayback Switching Regulators
Page 16 Pages


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Series STR-F6600
INTERIM DATA SHEET
OFF-LINE QUASI-RESONANT
(Subject to change without notice)
February 22, 2000
FLYBACK SWITCHING REGULATORS
The Series STR-F6600 is specifically designed to satisfy the require-
ments for increased integration and reliability in off-line quasi-resonant
flyback converters. The series incorporates a primary control and drive
circuit with discrete avalanche-rated power MOSFETs.
FDBK
OSC.
LATCH
Covering the power range from below 25 watts up to 300 watts for
100/115/230 VAC inputs, and up to 150 watts for 85 to 265 VAC
universal input, these devices can be used in a range of applications,
from battery chargers and set top boxes, to televisions, monitors, and
UVLO industrial power supply units.
OVP
TSD
Cycle-by-cycle current limiting, under-voltage lockout with hyster-
esis, over-voltage protection, and thermal shutdown protects the power
supply during the normal overload and fault conditions. Over-voltage
protection and thermal shutdown are latched after a short delay. The
latch may be reset by cycling the input supply. Low-current startup and
a low-power standby mode selected from the secondary circuit completes
a comprehensive suite of features. The series is provided in a five-pin
Dwg. PK-011-1
overmolded TO-3P style package, affording dielectric isolation without
compromising thermal characteristics.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Control Supply Voltage, VIN . . . . . . . . 35 V
Drain-Source Voltage, VDS
Series STR-F6620 . . . . . . . . . . . . 450 V
Series STR-F6630 . . . . . . . . . . . . 500 V
Series STR-F6650 . . . . . . . . . . . . 650 V
Series STR-F6670 . . . . . . . . . . . . 900 V
Drain Switching Current, ID . . .
Peak Drain Current, IDM . . . . . .
Avalanche Energy, EAS . . . . . . .
OCP/FB Voltage Range,
See Table
See Table
See Table
VOCP . . . . . . . . . . . . . . . -0.3 V to +6 V
Package Power Dissipation, PD
control (VIN x IIN(ON)) . . . . . . . . . 0.8 W
total . . . . . . . . . . . . . . . . . . . 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,
TS . . . . . . . . . . . . . . . . -40°C to +125°C
FEATURES
s Flyback Operation with Quasi-Resonant Soft Switching
for Low Power Dissipation and EMI
s Rugged Avalanche-Rated MOSFET
s Choice of MOSFET Voltage and rDS(on)
s Full Over-Current Protection (no blanking)
s Under-Voltage Lockout with Hysteresis
s Over-Voltage Protection
s Direct Voltage Feedback
s Low Start-up Current (<400 µA)
s Low-Frequency, Low-Power Standby Operation
s Overmolded 5-Pin Package
Always order by complete part number, e.g., STR-F6652 .
TM



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Series STR-F6600
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
V IN
4
UVLO
REF.
FUNCTIONAL BLOCK DIAGRAM
OVER-VOLT.
PROTECT
DRIVE
REG.
R
FAULT
LATCH
SQ
TSD
OSC
3 DRAIN
2 SOURCE
1.0
0.8
0.6
0.4
0.2
0
25
2
rSS + 1.45 V
c SS
+ 0.73 V
FEEDBACK &
1 OVER-CURRENT
PROTECTION
GROUND
Dwg. FK-002-6
Allowable package power dissipation curves
are shown on page 10.
50 75 100
STARTING CHANNEL TEMPERATURE in °C
125
Dwg.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 2000 Allegro MicroSystems, Inc.
TM



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Series STR-F6600
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
OUTPUT MAXIMUM RATINGS at TA = +25°C
Part Number
STR-F6624
VDSS (V)
450
rDS(on) ()
0.92
EAS (mJ)*
204
ID (A)†
16
STR-F6626
450 0.58
327 16
STR-F6628
450 0.35
647 22
STR-F6632 500 2.54
7.4 9.0
STR-F6652 650 2.8
126 7.9
STR-F6653
650 1.95
260 5.6
STR-F6654
650 1.15
399 9.7
STR-F6656
650 0.71
521 16
STR-F6672 900 7.7
163 4.6
STR-F6674
900 4.49
242 6.0
STR-F6676
900 2.81
275 7.8
* Derate per graph, page 2
† Derate per graph, page 12
IDM (A)
19
26
36
11.2
10
14
18
25
6.4
9.2
12
POUT (W) at VIN (V rms)
98
130
145
190
225
290
36
50
40
86
58
120
92
190
150
300
25 (no heatsink)
50 (with heat sink)
28
76
44
115
100
120
100
120
100
120
100
120
85-265
220
85-265
220
85-265
220
85-265
220
220
220
85-265
220
85-265
220
3



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Series STR-F6600
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
ELECTRICAL CHARACTERISTICS at TA = +25°C, VIN = 18 V (unless otherwise specified).
Limits
Characteristic
Symbol Test Conditions
Min. Typ. Max. Units
On-State Voltage
Under-Voltage Lockout
Over-Voltage Threshold
Drain-Source Breakdown Voltage
Drain Leakage Current
On-State Resistance
Maximum Off Time
Minimum Pulse Duration for Input of
Quasi-Resonant Signals
Minimum Off Time
Feedback Threshold Voltage
VINT
VINQ
VOVP(th)
VBR(DSS)
IDSS
rDS(ON)
toff
tw(th)
toff
VFDBK
Turn-on, increasing VIN
Turn-off, decreasing VIN
Turn-off, increasing VIN
ID = 300 µA
At VDS max
VS = 10 V, ID = 0.9 A, TJ = +25°C
Drain waveform high
14.4 16 17.6
9.0 10 11
20.5 22.5 24.5
VDS max –
––
300
– – see table
45 – 55
V
V
V
V
µA
µs
Drain waveform high1
Drain waveform high1
Drain waveform low to high1
Oscillation synchronized2
– – 1.0
– – 1.5
0.68 0.73 0.78
1.3 1.45 1.6
µs
µs
V
V
Over-Current Protection/Feedback
Sink Current
Latch Holding Current
Latch Release Voltage
Switching Time
Supply Current
Insulation RMS Voltage
IOCP/FB
IIN(OVP)
VIN
tf
IIN(ON)
IIN(OFF)
VWM(RMS)
VOCP/FB = 1.0 V
1.2 1.35 1.5 mA
VIN reduced from 24.5 V to 8.5 V
– 400 µA
IIN 20 µA, VIN reduced from 24.5 V 6.6 – 8.4 V
VDD = 200 V, ID = 0.9 A
– – 250 ns
Operating3
– – 30 mA
Increasing VIN prior to oscillation
All terminals simultaneous refer-
ence to a metal plate against
the backside
2000
100 µA
–V
Thermal Resistance
Thermal Shutdown
RθJM
TJ
Output channel to mounting frame
140
Notes: Typical Data is for design information only.
1. Feedback is square wave, VIM = 2.2 V, th = 1 µs, tl = 35 µs.
2. For quasi-resonant operation, the input signal must be longer than tw(th) and greater than VFDBK.
3. Feedback is square wave, VIM = 2.2 V, th = 4 µs, tl = 1 µs.
1.75 °C/W
°C
4
115 Northeast Cutoff, Box 15036
TM
Worcester, Massachusetts 01615-0036 (508) 853-5000



STR-F6624 datasheet pdf
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