STR-A6251 ALLEGRO [Allegro MicroSystems], STR-A6251 Datasheet - Page 3

• Manufacturer Part Number: STR-A6251
• Description: Universal-Input/15 W 50 kHz Flyback Switching Regulators
• Manufacturer: ALLEGRO [Allegro MicroSystems]

Typical values are given for circuit design information only.
Negative current is defined as coming out of (sourcing) the specified terminal.
ELECTRICAL CHARACTERISTICS at T
Characteristic
Drain-to-Source Breakdown Volt.
Drain Leakage Current
On-State Resistance
MOSFET Switching Time
Operation-Start Voltage
Operation-Stop Voltage
Maximum Switching Frequency
Frequency-Jitter Deviation
Maximum ON Duty Cycle
Circuit Current in Operation
Circuit Current in Non-Operation
FM Voltage
FM Current
OCP Threshold Voltage
Leading Edge Blanking Time
Burst Threshold Voltage
OLP Threshold Voltage
Current at OLP Operation
OLP Delay Time
Maximum FB Current
CC Set Voltage
CC Reset Voltage
Start-Up Current
OVP Operation Voltage
OVP/TSD Latch Sustaining Current
OVP/TSD Latch Release Voltage
Thermal Shutdown
Thermal Resistance
www.allegromicro.com
8 - 1
8 - 1
8 - 3
5 - 3
5 - 3
8 - 3
8 - 3
8 - 3
2 - 3
1 - 3
8 - 3
4 - 3
4 - 3
4 - 3
4 - 3
4 - 3
5 - 3
5 - 3
No.
Pin
8
5
5
2
4
4
5
5
-
-
A
Symbol
V
V
V
V
V
V
f
I
I
D max
I
r
osc(max)
CC(OFF)
= 25°C, V
FB(MAX)
I
CC(OVP)
I
(BR)DSS
CC(OFF)
CC(ON)
V
V
SET(CC)
RES(CC)
Δf
V
V
V
R
DS(on)
CC(ON)
startup
I
I
CC(H)
I
I
t
V
DSS
FMH
t
FML
OLP
OLP
burst
T
FMH
OCP
FML
OLP
bw
t
θ
CC
osc
f
J
JF
CC
Test Conditions
I
V
V
V
STR-A6251, I
STR-A6252, I
-
V
V
-
-
-
-
V
fosc = f
fosc < f
-
-
-
-
-
-
-
-
V
V
V
V
V
-
-
D
1
DS
1
CC
CC
CC
CC
CC
CC
CC
CC
= 18 V (unless otherwise specified).
= 300 µA,
– V
– V
= 12 V
= 650 V,
= 0
= 15.7
= 25 V
= 13 V
= 18
=35.2
=35.2
3
3
osc(max)
osc(max)
= 0 V (short)
= 0 V (short)
15.7 V
35.2 V
Flyback Switching Regulators
8.6 V
5.9 V
Universal-Input/15 W 50 kHz
D
D
9 V
STR-A6251 and STR-A6252
= 0.4 A
= 0.4 A
12.9
0.67
1.00
0.84
0.77
28.8
Min
650
-7.7
220
220
125
-12
9.0
3.0
4.0
3.2
7.7
7.3
4.9
3.5
5.9
45
70
-
-
-
-
-
-
-
-
Ratings
-11.0
14.3
11.0
1.10
32.0
0.74
1.12
1.20
Typ
320
310
140
5.0
4.5
3.6
8.6
-17
5.8
3.9
7.2
10
50
76
14
-
-
-
-
-
-
-
-
-14.3
3.95
15.7
14.3
0.81
1.24
1.56
1.43
35.2
Max
300
250
420
400
270
2.8
7.0
4.0
5.0
4.0
9.9
-22
6.7
4.3
8.6
11
55
82
25
52
-
-
°C/W
Units
kHz
kHz
°C
mA
µA
µA
mA
V
µA
µA
µA
%
ns
ns
Ω
V
µA
µA
V
V
Ω
V
V
V
V
V
V
s
V
V
3