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參數(shù)資料
| 型號(hào)： | TC28C46 |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | CMOS CURRENT MODE PWM CONTROLLER |
| 中文描述： | 的CMOS電流模式PWM控制器 |
| 文件頁(yè)數(shù)： | 8/10頁(yè) |
| 文件大?。?/td> | 113K |
| 代理商： | TC28C46 |
4-108
TELCOM SEMICONDUCTOR, INC.
CMOS CURRENT MODE
PWM CONTROLLERS
TC18C46
TC28C46
TC38C46
Figure 6. Oscillator Circuit
0.5V 3.5V
ICHARGE
'
3.5V
RO
8
CT
9
2mA
DISCHARGE
CURRENT
SYNC
10
VDD
3.5V
PIN 8
PIN 10
TCHG
OUTPUT DEAD TIME (TD)
+
–
RT
TD
1/FO
RT
Selection of Timing Capacitor and Resistor
(C
T
& R
T
)
1)
First determine the frequency of operation F
O
and
the desired " dead" time", T
D
(see Fig.6 graph).
We need to choose R
T
and C
T.
R
T
3)
During discharge (T
D
), the discharge current pulls
2 m A out of C
T,
minus the I
CHG
that keeps trying to
charge it:
2 m A - I
CHG
= C
T
= 3.0 Volts
V ,where
V= 3.0 Volts
T
T= T
D
2)
The current mirror in Fig. 6 , shows:
I
CHG
= 3.5 V . Also,
I
CHG
= C
T
Where,
and
T = T
CHG
3
C
T
= T
D
(.002 - 3.5)
R
T
Knowing T
D
choosing R
T
permits calculation of C
T
.
Substituting and rearranging,
V
T
V = 3.5 - 0.5
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| TC38C46 | CMOS CURRENT MODE PWM CONTROLLER |
| TC38C46CPE | CMOS CURRENT MODE PWM CONTROLLER |
| TC28C46EPE | CMOS CURRENT MODE PWM CONTROLLER |
| TC38C46COE | CMOS CURRENT MODE PWM CONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC28C46EOE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C46EPE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C47 | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C47EOE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
| TC28C47EPE | 制造商:TELCOM 制造商全稱:TelCom Semiconductor, Inc 功能描述:CMOS CURRENT MODE PWM CONTROLLER |
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