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參數(shù)資料
| 型號： | CS51221EN16 |
| 廠商： | ZF Electronics Corporation |
| 英文描述： | Enhanced Voltage Mode PWM Controller |
| 中文描述： | 增強(qiáng)的電壓模式PWM控制器 |
| 文件頁數(shù)： | 11/12頁 |
| 文件大?。?/td> | 164K |
| 代理商： | CS51221EN16 |
Application Information: continued
C
Figure 10. The design of feedback voltage divider has to consider the
error amplifier input current.
Design voltage dividers for OV and UV detection
In Fig.11, the voltage divider uses three resistors in series
to set OV and UV threshold seen from the input voltage.
The values of the resistors can be calculated from the fol-
lowing three equations, where the third equation is
derived from OV hysteresis requirement.
V
IN(LOW)
×
= 1V
(A)
V
IN(HIGH)
×
= 2V
(B)
12.5μA
× (
R1 + R2) = V
HYST
(C)
where
V
LINE(LOW)
, V
LINE(HIGH)
= input voltage OV and UV threshold
V
HYST
= OV hysteresis seen at V
IN
It is self-evident from equation A and B that to use this
design, V
IN(HIGH)
has to be two times greater than
V
IN(LOW)
. Otherwise, two voltage dividers have to be used
to program OV and UV separately.
Figure 11. OV /UV Monitor Divider.
V
IN
V
UV
V
OV
R
3
R
2
R
1
)
R3
R2 + R3 + R1
(
)
R2 + R3
R2 + R3 + R1
(
+
-
COMP
Ier
1.27
FB
R2
R1
V
OUT
-+
Ri
11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CS51221 | Enhanced Voltage Mode PWM Controller |
| CS51221EDR16 | Enhanced Voltage Mode PWM Controller |
| CS5124 | High Performance, Integrated Current Mode PWM Controllers |
| CS5126XD8 | High Performance, Integrated Current Mode PWM Controllers |
| CS5126 | High Performance, Integrated Current Mode PWM Controllers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CS51227/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Enhanced Voltage Mode PWM Controller |
| CS5124 | 制造商:CHERRY 制造商全稱:CHERRY 功能描述:High Performance, Integrated Current Mode PWM Controllers |
| CS5124/6 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Performance Integrated Current Mode PWM Controllers |
| CS5124/D | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Performance， Integrated Current Mode PWM Controllers |
| CS5124D8 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
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