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參數(shù)資料
| 型號： | STR-G6624 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | OFF-LINE QUASI-RESONANT FLYBACK SWITCHING REGULATOR |
| 中文描述： | 離線式準諧振反激式開關穩(wěn)壓器 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 175K |
| 代理商： | STR-G6624 |
STR-G6651
OFF-LINE
QUASI-RESONANT FLYBACK
SWITCHING REGULATOR
www.allegromicro.com
ELECTRICAL CHARACTERISTICS at T
A
= +25
°
C, V
IN
= 18 V, V
DD
= 10 V, V
S
= 0, voltage mea-
surements are referenced to ground terminal (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
650
–
–
V
Drain Leakage Current
I
DSS
V
DS
= 650 V
–
–
300
μ
A
On-State Resistance
r
DS(on)
V
S
= 10 V, I
D
= 0.9 A, T
J
= +25
°
C
–
–
3.95
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
mA
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 metal plate against backside
2000
–
–
V
Thermal Shutdown
T
J
140
–
–
°
C
Thermal Resistance
R
θ
JM
Output junction-to-mounting frame
–
–
1.63
°
C/W
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
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