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參數資料
| 型號： | MC34280FTB |
| 廠商： | ON SEMICONDUCTOR |
| 元件分類： | 電源管理 |
| 英文描述： | Power Supply & Management IC for Handheld Electronic Products |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP32 |
| 封裝： | LQFP-32 |
| 文件頁數： | 12/20頁 |
| 文件大?。?/td> | 380K |
| 代理商： | MC34280FTB |
MC34280
http://onsemi.com
12
VMAIN Zoom–In
V@SW
VMAIN
Coil Current
Loading Current, ILOAD
0 V
VMAIN + 1 V
TSW
TON
Ipk
VREF
Feedback Voltage
M1 ON
M2 OFF
M1 ON
M2 OFF
M1 ON
M2 OFF
M1 OFF
M2 ON
M1 OFF
M2 ON
M1 OFF
M2 ON
Cycle Starts
tdh
tdl
Figure 21. Waveforms of Continuous Conduction Mode
Cycle Starts
VMAIN Zoom–In
V@SW
VMAIN
Coil Current
Loading Current, ILOAD
VMAIN + 1 V
TSW
TON
Ipk
VREF
Feedback Voltage
M1 ON
M2 OFF
M1 ON
M2 OFF
M1 ON
M2 OFF
M1 OFF
M1 OFF
M1 OFF
tdh
tdl
VIN
0 V
Figure 22. Waveforms of Discontinuous Conduction Mode
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