
Series STR-F6600
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATORS
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
TM
4
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C, V
IN
= 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
μ
A
V
DS
max
–
–
V
Drain Leakage Current
I
DSS
At V
DS
max
–
–
300
μ
A
On-State Resistance
r
DS(ON)
V
S
= 10 V, I
D
= 0.9 A, T
J
= +25
°
C
–
–
see table
Maximum Off Time
t
off
Drain waveform high
45
–
55
μ
s
Minimum Pulse Duration for Input of
Quasi-Resonant Signals
t
w(th)
Drain waveform high
1
–
–
1.0
μ
s
Minimum Off Time
t
off
Drain waveform high
1
–
–
1.5
μ
s
Feedback Threshold Voltage
V
FDBK
Drain waveform low to high
1
0.68
0.73
0.78
V
Oscillation synchronized
2
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
μ
A
Latch Release Voltage
V
IN
I
IN
≤
20
μ
A, V
IN
reduced from 24.5 V
6.6
–
8.4
V
Switching Time
t
f
V
DD
= 200 V, I
D
= 0.9 A
–
–
250
ns
Supply Current
I
IN(ON)
Operating
3
–
–
30
mA
I
IN(OFF)
Increasing V
IN
prior to oscillation
–
–
100
μ
A
Insulation RMS Voltage
V
WM(RMS)
All terminals simultaneous refer-
ence to a metal plate against
the backside
2000
–
–
V
Thermal Resistance
R
θ
JM
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, t
h
= 1
μ
s, t
l
= 35
μ
s.
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
μ
s, t
l
= 1
μ
s.