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参数资料
| 型号： | MB3790PFT |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封装： | PLASTIC, TSSOP-20 |
| 文件页数： | 8/22页 |
| 文件大小： | 192K |
| 代理商： | MB3790PFT |
MB3790
16
3.
Outputting Reset Signal Forcibly
The reset signal can be output forcibly by bringing the VSENSE pin of the MB3790 to a Low level (< 1.24). The reset
signal is held on until the capacitor CT is charged up after the VSENSE pin is released open.
[Reset Pulse Width Calculation Formula]
Reset Pulse Width tPO (s) = CT (F)
×106 (where CT = capacitance)
Example: When CT = 1000 pF, tPO = 1 ms (Typ)
Forced Reset Method 1
Forced Reset Method 2
V IN
VSENSE
47k
SW
CT
GND
CT
SW: Turned on (VRESET = High)
V IN
VSENSE
47k
Control signal
input pin
CT
GND
10k
10k
Q1
CT
When the voltage enough to turn on Q1 (
≥ approx. 1.2 V) gives to the Control signal input pin,
VRESET is equal to High level.
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