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參數(shù)資料
| 型號(hào)： | TDA4718A |
| 廠商： | SIEMENS A G |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Control IC for Single-Ended and Push-Pull Switched-Mode Power Supplies SMPS |
| 中文描述： | 0.07 A SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PDIP18 |
| 文件頁(yè)數(shù)： | 17/21頁(yè) |
| 文件大?。?/td> | 436K |
| 代理商： | TDA4718A |
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TDA 4700
TDA 4718
Semiconductor Group
17
Dimensioning Notes for RC Network
1. Determination of the minimum time during which both outputs must be disabled
→
selection of
C
T
; selection of
C
R
≤
C
T
.
2. Determination of the VCO frequency = 2 x output frequency
→
selection of
R
T
.
3. Determination of the rated slope of the rising ramp generator voltage, which the
maximum possible turn-on period per half wave depends on
→
selection of
R
R
.
4. Duration of the soft start process
→
selection of
C
soft start
.
5. In the case of a free-running VCO: connect sync output with sync input.
6. Wiring of the op amp according to the dynamic requirements and
connection of its output with the free input of K2. (TDA 4700; TDA 4700 A)
7. Capacitance
C
filter
is not required in the free-running operation (sync input connected
with sync output).
In the case of external synchronization, that value depends on the selected operating
frequency and the required maximum phase interference deviation.
Rated VCO frequency:
100 kHz
C
filter
favourable:
10 nF
50 Hz
1
μ
F
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