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