STR-X6759N [SANKEN]
Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency; 电源IC准谐振式开关电源具有高效率
| 型号： | STR-X6759N |
| 厂家： | 
SANKEN ELECTRIC |
| 描述： | Power IC for Quasi-Resonant Type Switching Power Supply with High Efficiency |
| 文件： | 总2页 (文件大小：96K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
STR-X6700 Series
Power IC for Quasi-Resonant Type Switching Power Supply
with High Efficiency and Low Noise in Full Load Range
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■
General Descriptions
The STR-X6700 series products are power ICs for quasi-resonant type switching power
supplies, incorporating a power MOSFET and a controller IC, The product achieves high
efficiency and low noise power supply systems by the quasi-resonant operation and the
bottom-skip quasi-resonant operation.
The STR-W6700 series products are the different package (TO-220F) versions.
Features
ꢀ
Multi-Mode Control
TO-3PF-7
The operation mode switching with three steps according to load conditions achieves the
optimal high efficiency and low noise power supply systems across the full load range.
(The confirmation of product number is necessary because some functions are different in each product.)
・In Standby (Under Standby Load Conditions):
－UVLO Intermittent Oscillation by low output voltage --- Switched by Standby Signal, or
－Auto Burst-Oscillation --- Switched Automatically
・Under Low to Middle Load Conditions: Bottom-Skip Quasi-Resonant Operation (Bottom-Skip QR)
・Under Middle to Rating (or Heavy) Load Conditions: Quasi-Resonant Operation (QR)
Current-Mode Control
ꢀ
ꢀ
Built-in PWM Oscillator
The PWM operates with the minimum frequency of around 22 kHz, until the quasi-resonant signal becomes
valid, reduces the stress on components at startup and load-shorted.
Soft-Start Function
Step-Drive Function, reducing switching noise
Built-in Maximum ON Time Limitation Circuit
ꢀ
ꢀ
ꢀ
The function limits the maximum ON time of power MOSFET, during the transitions at low input voltage,
power ON/OFF.
ꢀ
Input Compensation at Overcurrent
The function reduces the distortion of overcurrent operation point to AC input voltage change by adding three
components.
ꢀ
ꢀ
Built-in Avalanche Energy Guaranteed High-Voltage Power MOSFET
Various Protections
Overcurrent Protection (OCP) -------------------------------Pulse-by-Pulse
Overload Protection (OLP)-----------------------------------Latch Shutdown
Overvoltage Protection (OVP)-------------------------------Latch Shutdown
■
■
Applications
Switching Power Supplies for
Digital Consumer Equipment; LCD-TVs, PDP-TVs, CRT-TVs, etc., Home Appliances, OA Equipments,
Industry Machines, Communication Devices, Others
Product Lineup
MOSFET
VDSS
(V)
RDS
MAX
MOSFET
VDSS
(V)
RDS
(ON
MAX
(
ON
)
Burst-
Oscillation Skip QR
Bottom-
)
Burst-
Oscillation Skip QR
Bottom-
Product No.
Product No.
M
IN
M
IN
(Ω)
(Ω)
N
Y
N
Y
Y
N
N
Y
Y
Y
Y
Y
Y
Y
Y
N
Y
N
N
Y
N
N
Y
N
N
Y
Y
N
STR-X6729
STR-X6737
STR-X6737M
STR-X6756
STR-X6757
STR-X6757N
STR-X6750B
450
500
500
650
650
650
650
0.189
0.36
0.36
0.73
0.62
0.62
0.62
STR-X6750F
STR-X6759N
STR-X6759F
STR-X6759B
STR-X6768N
STR-X6769
650
650
650
650
800
800
800
0.62
0.385
0.385
0.385
1.0
0.66
0.66
STR-X6769B
Y: Including the function
N: Excluding the function
■
Typical Application Circuit
VAC
+B
ErrAmp
STR-X6700
GND
Standby
ON/OFF Signal
1
4
D
Vcc
UVLO Intermittent Oscillation Circuit Example
Low B
Cont．
Standby
Reg
V
OUT
GND
FB
6
OCP/BD SS/OLP
S
GND
2
3
7
5
Reg： Linear Regulator IC from Sanken, Others
■
Typical Operation Waveforms
Transitions between Bottom-Skip QR Operation and Quasi-Resonant Operation
Load Change
STR-X6700 Input Power- Frequency
Heavy
Light
1 Bottom-Skip QR
100VAC
QR
140
120
100
80
ID
1Skip
QR
VDS
60
40
20
0
0
50
100
150
200
250
Input Power PIN (W)
240VAC
140
120
100
80
1Skip
60
40
20
0
0
50
100
150
200
250
Input Power PIN (W)
Warning
ꢀ The contents in this document are subject to changes, for improvement and other purposes, without notice.
Make sure that this is the latest version of the document before use.
ꢀ The operation and circuit examples in this document are provided for reference purposes only. Sanken assumes no liability for violation of industrial property, intellectual property, or other rights of
Sanken or third parties, that stem from these examples.
ꢀ The user must take responsibility for considering and determining which objects the products in this document are used with.
ꢀ Although Sanken will continue to improve the quality and reliability of its products,
semiconductor products, by their nature, have certain fault and failure rates. The user must take responsibility for designing and checking to secure the device and system so that a part failure may not lead
to human injury, fire, damages, or other losses.
ꢀ The contents in this document must not be transcribed or copied without Sanken’s written consent.
SANKEN ELECTRIC CO.,LTD.
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