Switching Regulator. STR-W6754 Datasheet

STR-W6754 Regulator. Datasheet pdf. Equivalent

STR-W6754 Datasheet
Recommendation STR-W6754 Datasheet
Part STR-W6754
Description Universal-Input/100 W Off-Line QuasiResonant Flyback Switching Regulator
Feature STR-W6754; STR-W6754 Quasi-Resonant Topology Primary Switching Regulators Features and Benefits ▪ Quasi-resona.
Manufacture Sanken
Datasheet
Download STR-W6754 Datasheet





Sanken STR-W6754
STR-W6754
Quasi-Resonant Topology
Primary 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
650 V / 0.96 Ω
Various protections Improved system-level reliability
Continued on the next page…
Package: 6-pin TO-220
Description
The STR-W6754 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-220, which contains the
controller chip (MIC) and MOSFET, enabling output power up
to 100 W with universal input or 160 W with a 230 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.
The soft-start mode minimizes surge voltage and reduces
power stress to the MOSFET and to the secondary rectifying
Not to scale
Continued on the next page…
Typical Application Diagram
P S1
+B
ErrAmp A
D
1
4
STR-W6754
VCC
Controller
(MIC)
6
FB
37
S/GND OCP/BD
5
SS /OLP
ROCP
RX
CX
D
S2
B SI
GND
Standby
ON/OFF
LowB
Standby
Out
GND
A For ErrAmp, Sanken SE series device recommended
B For SI, Sanken linear regulator IC recommended
28103.32
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/



Sanken STR-W6754
STR-W6754
Quasi-Resonant Topology
Primary Switching Regulators
Features and Benefits (continued)
Pulse-by-pulse drain overcurrent limiting
Overvoltage protection (bias winding voltage sensing),
with latch
Overload protection with latch
Maximum on-time limit
Selection Guide
Part Number
STR-W6754
Package
TO-220
Description (continued)
diodes during the start-up sequence. Various protections such as
overvoltage, overload, overcurrent, maximum on-time protections
and avalanche-energy-guaranteed MOSFET secure good system-
level reliability.
Applications include the following:
Set Top Box
LCD PC monitor, LCD TV
Printer, Scanner
SMPS power supplies
Absolute Maximum Ratings at TA = 25°C
Parameter
Symbol
Conditions
Drain Current1
Maximum Switching Current2
Single Pulse Avalanche Energy3
Input Voltage for Controller (MIC)
SS/OLP Terminal Voltage
FB Terminal Inflow Current
FB Terminal Voltage
OCP/BD Terminal Voltage
MOSFET Power Dissipation4
IDpeak
IDmax
EAS
VCC
VSSOLP
IFB
VFB
VOCPBD
PD1
Single pulse
TA = –20°C to 125°C
Single pulse, VDD = 99 V, L = 20 mH, ILpeak = 5.1 A
IFB within the limits of IFB
With infinite heatsink
Without heatsink
Controller (MIC) Power Dissipation
Operating Internal Leadframe Temperature
Operating Ambient Temperature
Storage Temperature
Channel Temperature
1Refer to figure 2
PD2 VCC × ICC
TF Recommended operation temperature, see cautions
TOP
Tstg
Tch
2IDMAX is the drain current determined by the drive voltage of the IC and the threshold voltage, Vth, of the MOSFET
3Refer to figure 3
4Refer to figure 5
Rating
15
15
292
35
–0.5 to 6.0
10
–0.5 to 9.0
–1.5 to 5.0
28
1.3
0.8
–20 to 115
–20 to 115
–40 to 125
150
Unit
A
A
mJ
V
V
mA
V
V
W
W
W
°C
°C
°C
°C
All performance characteristics given are typical values for circuit or
system baseline design only and are at the nominal operating voltage and
an ambient temperature, TA, of 25°C, unless otherwise stated.
28103.32
SANKEN ELECTRIC CO., LTD.
2



Sanken STR-W6754
STR-W6754
Quasi-Resonant Topology
Primary Switching Regulators
4
VCC
+
-
OVP
Start
Stop
Burst
RQ
S
+
-
OLP
Reg and
Iconst
Burst
Control
Protection
Latch
R
Q
S
Drive
Reg
Delay
Control IC
OSC
Max On
S
Q
R
BSD -
+
Soft Start
Bottom Select
Counter
+
FB- -
+
OCP
BD +
-
D1
3
S/GND
FB 6
OCP/BD 7
SS/OLP
5
Terminal List Table
Number
1
Name
D
2 NC
3 S/GND
4 VCC
5 SS/OLP
6 FB
7 OCP/BD
Description
Drain
Clipped
Source/ground terminal
Power supply terminal
Soft Start/Overload Protection terminal
Feedback terminal
Overcurrent Protection/Bottom Detection
Functions
MOSFET drain
No connection
MOSFET source and 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
Figure 1 – MOSFET Safe Operating Area
Derating Curve
100
Figure 2 – MOSFET Safe Operating Area
Drain Current versus Voltage
at TA = 25°C, Single Pulse
100.00
80
60
40
20
0
0
28103.32
10.00
Current limit
due to RDS(on)
1 ms 0.1 ms
1.00
20 40 60 80 100 120
Temperature, TF (°C)
0.10
10
Refer to figure 1 for MOSFET SOA
temperature derating coefficient
100
Drain-to-Source Voltage, VDS (V)
1000
SANKEN ELECTRIC CO., LTD.
3





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