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STR-W6765 Datasheet(PDF) 5 Page - Allegro MicroSystems

Part No. STR-W6765
Description  Quasi-Resonant Topology Primary Switching Regulators
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Maker  ALLEGRO [Allegro MicroSystems]
Homepage  http://www.allegromicro.com
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STR-W6765 Datasheet(HTML) 5 Page - Allegro MicroSystems

 
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Quasi-Resonant Topology
Primary Switching Regulators
STR-W6765
5
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Terminals
Min.
Typ.
Max.
Units
ELECTRICAL CHARACTERISTICS for Controller (MIC)1
, valid at TA = 25°C, VCC = 20 V, unless otherwise specified
Power Supply Start-up Operation
Operation Start Voltage
VCC(ON)
4 - 3
16.3
18.2
19.9
V
Operation Stop Voltage
VCC(OFF)
4 - 3
8.8
9.7
10.6
V
Circuit Current In Operation
ICC(ON)
4 - 3
6
mA
Circuit Current In Non-Operation
ICC(OFF)
4 - 3
100
μA
Oscillation Frequency
fosc
1 - 3
19
22
25
kHz
Soft Start Operation Stop Voltage
VSSOLP(SS)
5 - 3
1.1
1.2
1.4
V
Soft Start Operation Charging Current
ISSOLP(SS)
5 - 3
–710
–550
–390
μA
Normal Operation
Bottom-Skip Operation Threshold Voltage 1
VOCPBD(BS1)
7 - 3
–0.720
–0.665
–0.605
V
Bottom-Skip Operation Threshold Voltage 2
VOCPBD(BS2)
7 - 3
–0.485
–0.435
–0.385
V
Overcurrent Detection Threshold Voltage
VOCPBD(LIM)
7 - 3
–0.995
–0.940
–0.895
V
OCP/BDOCP/BD Terminal Outflow Current
IOCPBD
7 - 3
–250
–100
–40
μA
Quasi-Resonant Operation Threshold Voltage 1
VOCPBD(TH1)
7 - 3
0.28
0.40
0.52
V
Quasi-Resonant Operation Threshold Voltage 2
VOCPBD(TH2)
7 - 3
0.67
0.80
0.93
V
FB Terminal Threshold Voltage
VFB(OFF)
6 - 3
1.32
1.45
1.58
V
FB Terminal Inflow Current (Normal Operation)
IFB(ON)
6 - 3
600
1000
1400
μA
Standby Operation
Standby Operation Start Voltage
VCC(S)
4 - 3
10.3
11.1
12.1
V
Standby Operation Start Voltage Interval
VCC(SK)
4 - 3
1.10
1.35
1.65
V
Standby Non-Operation Circuit Current
ICC(S)
4 - 3
20
56
μA
FB Terminal Inflow Current, Standby Operation
IFB(S)
6 - 3
4
14
μA
FB Terminal Threshold Voltage, Standby Operation
VFB(S)
6 - 3
0.55
1.10
1.50
V
Minimum On Time
tON(MIN)
1 - 3
0.40
0.82
1.25
μs
Maximum On Time
tON(MAX)
1 - 3
27.5
32.5
39.0
μs
Protection Operation
Overload Protection Operation Threshold Voltage
VSSOLP(OLP)
5 - 3
4.0
4.9
5.8
V
Overload Protection Operation Charging Current
ISSOLP(OLP)
5 - 3
–16
–11
–6
μA
Overvoltage Protection Operation Voltage
VCC(OVP)
4 - 3
25.5
27.7
29.9
V
Latch Circuit Holding Current2
ICC(H)
4 - 3
45
140
μA
Latch Circuit Release Voltage2
VCC(La.OFF)
4 - 3
6.0
7.2
8.5
V
ELECTRICAL CHARACTERISTICS for MOSFET
, valid at TA = 25°C, unless otherwise specified
Drain-to-Source Breakdown Voltage
VDSS
1 - 3
800
V
Drain Leakage Current
IDSS
1 - 3
300
μA
On Resistance
RDS(on)
1 - 3
1.8
Ω
Switching Time
tf
1 - 3
400
ns
Thermal Resistance
RθJA
Junction to Internal
Frame
1.55
°C/W
1
Current polarity with respect to the IC: positive current indicates current sink at the terminal named, negative current indicates source at the
terminal named.
2
Latch circuit refers to operation during Overload Protection or Overvoltage Protection.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com


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