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參數(shù)資料
| 型號： | MCP1630 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | High-Speed, Microcontroller-Adaptable, Pulse Width Modulator |
| 中文描述： | 高速微控制器適應(yīng)性，脈寬調(diào)制器 |
| 文件頁數(shù)： | 11/18頁 |
| 文件大?。?/td> | 273K |
| 代理商： | MCP1630 |
2004 Microchip Technology Inc.
DS21896A-page 11
MCP1630
4.7
Overtemperature Protection
To protect the V
EXT
output if shorted to V
IN
or GND, the
MCP1630 V
EXT
output will be high-impedance if the
junction temperature is above the thermal shutdown
threshold. There is an internal 100 k
pull-down resis-
tor connected from V
EXT
to ground to provide some
pull-down during overtemperature conditions. The
protection is set to 150°C typical with a hysteresis of
18°C.
FIGURE 4-1:
Cycle-by-Cycle Timing Diagram
OSC IN
S
COMP
Q
MCP1630 High-Speed PWM Timing Diagram
CS
R
V
DRIVE
V
EXT
R
S
Q
Q
EA
+
-
V
REF
FB
Comp
-
+
CS
OSC IN
V
IN
COMP
GND
V
EXT
2R
R
V
IN
2.7V Clamp
Overtemperature
UVLO
100 k
0.1 μA
0.1 μA
V
IN
V
IN
Latch Truth Table
S
R
Q
0
0
1
1
0
1
0
1
Qn
1
0
1
Note:
During overtemperature, V
EXT
driver is high-impedance.
Note
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