str-y6400 Sanken Electric Co., Ltd., str-y6400 Datasheet - Page 2

• Manufacturer Part Number: str-y6400
• Description: Power Ic For Quasi-resonant Type Switching Power Supply With High Efficiency, Low Noise And Low Standby Power In Full Load Range
• Manufacturer: Sanken Electric Co., Ltd.

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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.
V
I
Typical Application Circuit
Typical Operation Waveforms & Typical Electrical Characteristics
Operation Mode Transitions
Efficiency Comparison of Multi Mode vs. Quasi-Resonant Mode
D
DS
100
90
80
70
60
50
40
30
20
10
Minimum Load
V V V V A A A A C C C C
0
(Burst-Oscillation)
0.0
Standby
Efficiency
Improve-
ment
1.0
Output Power P
出力電力
出力電力
出力電力
出力電力Po
1 1 1 1
2 2 2 2
D D D D / / / / S S S S t t t t a a a a r r r r t t t t u u u u p p p p
S S S S T T T T R R R R - - - - Y Y Y Y 6 6 6 6 4 4 4 4 0 0 0 0 0 0 0 0
S S S S / / / / G G G G N N N N D D D D
2.0
SANKEN ELECTRIC CO.,LTD.
C C C C o o o o n n n n t t t t ． ． ． ．
AC120V STR-Y6476
AC230V STR-Y6476
AC120V 擬似共振
AC230V 擬似共振
120VAC STR-Y6476
230VAC STR-Y6476
120VAC QR
230VAC QR
Po
Po[ [ [ [ W W W W ] ] ] ]
Po
3.0
3 3 3 3
6 6 6 6
V V V V c c c c c c c c
O O O O C C C C P P P P
A A A A D D D D J J J J
OUT
B B B B D D D D
F F F F B B B B
QR
QR
5 5 5 5
4 4 4 4
7 7 7 7
(W)
2 Bottom-Skip
4.0
5.0
Warning
100
90
80
70
60
50
40
30
20
10
0
0
1 Bottom-Skip
Efficiency
Improve-
ment
5
Output Power P
10
出力電力
出力電力Po
出力電力
出力電力
15
120VAC STR-Y6476
230VAC STR-Y6476
120VAC QR
230VAC QR
AC120V STR-Y6476
AC230V STR-Y6476
AC120V 擬似共振
AC230V 擬似共振
Po[ [ [ [ W W W W ] ] ] ]
Po
Po
20
OUT
QR
QR
Quasi-Resonant
Maximum Load
V V V V
G G G G N N N N D D D D
(W)
O O O O U U U U T T T T
25
30