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參數資料
| 型號： | TC33025VOETR |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | SOIC-16 |
| 文件頁數： | 2/18頁 |
| 文件大?。?/td> | 416K |
| 代理商： | TC33025VOETR |
TC33025
10
TC33025-1 5/25/00
High Speed Double Ended Controller
Q
T
VIN
RS
To
Current
Sense
Input
12
11
14
15
VC
Base Charge
Removal
0
–
+
IB
The totem pole output can furnish negative base current for enhanced
transistor turn—of f, with the addition of the capacitor in series with the base
VREF
R1
CSS
R2
1
2
8
+
In voltage mode operation, the maximum duty cycle can be clamped. By the
addition of a PNP transistor to buffer the clamp voltage, the Soft—Start curren
is not affected by R1.
The new equation for Soft—Start is
t
≈
VCLAMP + 0.6 (CSS)
9.0 A
In current mode operation, this circuit will limit the maximum voltage allowed
at the ramp input to end a cycle.
Figure 14. Buffered Maximum Clamp Level
Figure 15. Bipolar Transistor Drive
Figure 16. Isolated MOSFET Drive
Q
T
VC
12
11
14
15
Isolation
Boundary
VC
12
11
14
15
Q
T
Figure 17. Direct Transformer Drive
The totem pole output can easily drive pulse transformers. A Schottky diode is recommended when driving indcutive loads at high frequencies.
The diode can reduce the driver's power dissipation due to excessive ringing, by preventing the output pin from being drien below ground.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TC33025VPE | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| TC33063AVOA | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Microchip Technology Inc 功能描述: |
| TC33063AVOATR | 制造商:Rochester Electronics LLC 功能描述:- Tape and Reel |
| TC33063AVPA | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Microchip Technology Inc 功能描述: |
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