參數(shù)資料
型號(hào)： TNY279PG
廠商： POWER INTEGRATIONS INC
元件分類(lèi)： 穩(wěn)壓器
英文描述： 0.695 A SWITCHING REGULATOR, PDIP7
封裝： ROHS COMPLIANT, PLASTIC, MS-001AB, DIP-8/7
文件頁(yè)數(shù)： 21/24頁(yè)
文件大?。?/td> 1024K
代理商： TNY279PG
Rev. I 01/09
6
TNY274-280
www.powerint.com
Figure 12. Normal Power Down Timing (without UV).
Figure 13. Slow Power Down Timing with Optional External (4 MΩ) UV Resistor
Connected to EN/UV Pin.
Figure 10. Power Up with Optional External UV Resistor (4 MΩ)
Connected to EN/UV Pin.
Figure 11. Power Up Without Optional External UV Resistor
Connected to EN/UV Pin.
PI-2395-030801
0
2.5
5
Time (s)
0
100
200
400
300
0
100
200
V
DC-INPUT
V
DRAIN
0
12
Time (ms)
0
200
400
5
0
10
0
100
200
PI-2383-030801
V
DC-INPUT
V
BYPASS
V
DRAIN
PI-2381-1030801
0
12
Time (ms)
0
200
400
5
0
10
0
100
200
V
DC-INPUT
V
BYPASS
V
DRAIN
PI-2348-030801
0
.5
1
Time (s)
0
100
200
300
0
100
200
400
V
DC-INPUT
V
DRAIN
At near maximum load, TinySwitch-III will conduct during nearly
all of its clock cycles (Figure 6). At slightly lower load, it will
“skip” additional cycles in order to maintain voltage regulation at
the power supply output (Figure 7). At medium loads, cycles
will be skipped and the current limit will be reduced (Figure 8).
At very light loads, the current limit will be reduced even further
(Figure 9). Only a small percentage of cycles will occur to satisfy
the power consumption of the power supply.
The response time of the ON/OFF control scheme is very fast
compared to PWM control. This provides tight regulation and
excellent transient response.
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