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STRF6626 Datasheet(PDF) 4 Page - Allegro MicroSystems

Part No. STRF6626
Description  OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATORS
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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STRF6626 Datasheet(HTML) 4 Page - Allegro MicroSystems

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


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