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STR-X6737 の電気的特性と機能

STR-X6737のメーカーはSankenです、この部品の機能は「Off-Line Quasi-Resonant Switching Regulators」です。


製品の詳細 ( Datasheet PDF )

部品番号 STR-X6737
部品説明 Off-Line Quasi-Resonant Switching Regulators
メーカ Sanken
ロゴ Sanken ロゴ 




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STR-X6737 Datasheet, STR-X6737 PDF,ピン配置, 機能
STR-X6737
Off-Line Quasi-Resonant Switching Regulators
Features and Benefits
Quasi-resonant topology IC Low EMI noise and soft
switching
Bottom-skip mode Improved system efficiency over
the entire output load by avoiding increase of switching
frequency
Auto-Standby mode Lowers input power at very light
output load condition
Avalanche-guaranteed MOSFET Improves system-level
reliability and does not require VDSS derating
500 VDSS / 0.36 Ω RDS(on)
Various protections Improved system-level reliability
Pulse-by-pulse drain overcurrent limiting
Overvoltage Protection (bias winding voltage sensing),
with latch
Overload Protection with latch
Maximum on-time limit
Package: 7-Pin TO-3P
Description
The STR-X6737 is a quasi-resonant topology IC designed for
SMPS applications. It shows lower EMI noise characteristics
than conventional PWM solutions, especially at greater than
2 MHz. It also provides a soft-switching mode to turn on the
internal MOSFET at close to zero voltage (VDS bottom point)
by use of the resonant characteristic of primary inductance
and a resonant capacitor.
The package is a fully molded TO-3P, which contains the
controller chip (MIC) and MOSFET, enabling output power
up to 280 W at 120 VAC input. The bottom-skip mode skips
the first bottom of VDS and turns on the MOSFET at the second
bottom point, to minimize an increase of operating frequency
at light output load, improving system-level efficiency over
the entire load range.
There are two standby modes available to reduce the input power
under very light load conditions. The first is Auto-Standby
mode, which is internally triggered by periodic sensing, and
the other is a manual standby mode, which is executed by
clamping the secondary output. In general applications, the
manual standby mode reduces the input power further compared
to Auto-Standby mode.
Not to scale
Continued on the next page…
Typical Application
28103.30-9

1 Page





STR-X6737 pdf, ピン配列
STR-X6737
Off-Line Quasi-Resonant Switching Regulators
Functional
Block Diagram
Terminal List Table
Number
1
Name
D
Drain
Description
2 S Source
3
GND
Ground terminal
4
VCC
Power supply terminal
5 SS/OLP Soft Start/Overload Protection terminal
6 FB Feedback terminal
7 OCP/BD Overcurrent Protection/Bottom Detection
Functions
MOSFET drain
MOSFET source
Ground
Input of power supply for control circuit
Input to set delay for Overload Protection and Soft Start operation
Input for Constant Voltage Control and Burst (intermittent) Mode
oscillation control signals
Input for Overcurrent Detection and Bottom Detection signals
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
3


3Pages


STR-X6737 電子部品, 半導体
STR-X6737
Off-Line Quasi-Resonant Switching Regulators
ELECTRICAL CHARACTERISTICS
Characteristic
Symbol
Test Conditions
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
Operation Stop Voltage
Circuit Current In Operation
Circuit Current In Non-Operation
Oscillation Frequency
Soft Start Operation Stop Voltage
Soft Start Operation Charging Current
VCC(ON)
VCC(OFF)
ICC(ON)
ICC(OFF)
fosc
VSSOLP(SS)
ISSOLP(SS)
VCC = 020 V
VCC = 208.8 V
VCC = 15 V
VSS/OLP increasing
VSS/OLP = 0 V
16.3
8.8
19
1.1
–710
18.2
9.7
22
1.2
–550
19.9
10.6
6
100
25
1.4
–390
V
V
mA
μA
kHz
V
μA
Normal Operation
Bottom-Skip Operation Threshold Voltage 1
Bottom-Skip Operation Threshold Voltage 2
Overcurrent Detection Threshold Voltage
OCP/BD Terminal Outflow Current
Quasi-Resonant Operation Threshold Voltage 1
Quasi-Resonant Operation Threshold Voltage 2
FB Terminal Threshold Voltage
FB Terminal Inflow Current (Normal Operation)
VOCPBD(BS1)
VOCPBD(BS2)
VOCPBD(LIM) VOCP/BD falling
IOCPBD VOCP/BD = –0.95 V
VOCPBD(TH1) VOCP/BD falling
VOCPBD(TH2) VOCP/BD rising
VFB(OFF) VFB rising
IFB(ON) VFB = 1.6 V
–0.720
–0.485
–0.995
–250
0.28
0.67
1.32
600
–0.665
–0.435
–0.940
–100
0.40
0.80
1.45
1000
–0.605
–0.385
–0.895
–40
0.52
0.93
1.58
1400
V
V
V
μA
V
V
V
μA
Standby Operation
Standby Operation Start Voltage
Standby Operation Start Voltage Interval
Standby Non-Operation Circuit Current
FB Terminal Inflow Current, Standby Operation
FB Terminal Threshold Voltage, Standby Operation
Minimum On Time
VCC(S)
VCC(SK)
ICC(S)
IFB(S)
VFB(S)
tON(MIN)
VCC = 015 V, VFB = 1.6 V
VCC(SK) = VCC(S) – VCC(OFF)
VCC = 10.2 V, VFB = 1.6 V
VCC = 10.2 V, VFB = 1.6 V
VCC = 15 V, VFB rising
10.3 11.2 12.1
V
1.10 1.35 1.65
V
– 20 56 μA
– 4 14 μA
0.55 1.10 1.50
V
0.75 1.10 1.50 μs
Protection Operation
Maximum On Time
tON(MAX)
27.5 32.5 39.0 μs
Overload Protection Operation Threshold Voltage
VSSOLP(OLP)
4.0 4.9 5.8 V
Overload Protection Operation Charging Current
ISSOLP(OLP) VSS/OLP = 2.5 V
–16 –11 –6 μA
Overvoltage Protection Operation Voltage
VCC(OVP) VCC = 030 V
25.5 27.7 29.9
V
Latch Circuit Holding Current2
ICC(H)
VCC(OFF) – 0.3 V
– 45 140 μA
Latch Circuit Release Voltage2
VCC(La.OFF) VCC = 306 V, OVP operating
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
IDSS = 300 μA
500 –
–V
Drain Leakage Current
IDSS
VDSSS = 500 V
– – 300 μA
On Resistance
RDS(on)
IDS = 4.0 A
– – 0.36 Ω
Switching Time
tf
– – 500 ns
Thermal Resistance
Rθch-F Channel to internal frame
– – 1.09 °C/W
1Current polarity with respect to the IC: positive current indicates current sink at the terminal named, negative current indicates source at the
terminal named.
2The latch circuit means a circuit operated OVP and OLP.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6

6 Page



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部品番号部品説明メーカ
STR-X6737

Off-Line Quasi-Resonant Switching Regulators

Sanken
Sanken


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