參數資料
型號: TNY266P
廠商: POWER INTEGRATIONS INC
元件分類: 穩(wěn)壓器
英文描述: Enhanced, Energy Efficient, Low Power Off-line Switcher
中文描述: 0.56 A SWITCHING REGULATOR, 140 kHz SWITCHING FREQ-MAX, PDIP7
封裝: 0.300 INCH, PLASTIC, MS-001-AB, DIP-8
文件頁數: 6/20頁
文件大?。?/td> 516K
代理商: TNY266P
6
B
7/01
TNY264/266-268
Figure 12. Normal Power-down Timing (without UV).
Figure 13. Slow Power-down Timing with Optional External
(2 M
) UV Resistor Connected to EN/UV Pin.
P
0
2.5
5
Time (s)
0
100
200
400
300
0
100
200
VDC-INPUT
VDRAIN
in applications with and without an external resistor (2 M
)
connected to the EN/UV pin.
During power-down, when an external resistor is used, the
power MOSFET will switch for 50 ms after the output loses
regulation. The power MOSFET will then remain off without
any glitches since the under-voltage function prohibits restart
when the line voltage is low.
Figure 12 illustrates a typical power-down timing waveform of
TinySwitch-II
. Figure 13 illustrates a very slow power-down
timing waveform of
TinySwitch-II
as in standby applications.
The external resistor (2 M
) is connected to the EN/UV pin in
this case to prevent unwanted restarts.
Figure 10. TinySwitch-II Power-up with Optional External UV
Resistor (2 M
) Connected to EN/UV Pin.
Figure 11. TinySwitch-II Power-up without Optional External UV
Resistor Connected to EN/UV Pin.
P
0
1
2
Time (ms)
0
200
400
5
0
10
0
100
200
VDC-INPUT
VBYPASS
VDRAIN
0
1
2
Time (ms)
0
200
400
5
0
10
0
100
200
P
VDC-INPUT
VBYPASS
VDRAIN
PI-2661-072400
V
DRAIN
V
EN
CLOCK
D
DRAIN
I
MAX
Figure 9. TinySwitch-II Operation at Very Light Load.
P
0
.5
1
Time (s)
0
100
200
300
0
100
200
400
VDC-INPUT
VDRAIN
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