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參數(shù)資料
| 型號(hào)： | LA7790M |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO24 |
| 封裝： | MFP-24 |
| 文件頁(yè)數(shù)： | 5/14頁(yè) |
| 文件大?。?/td> | 174K |
| 代理商： | LA7790M |
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5. Oscillator Output
The output frequency of the oscillator is equal to or half of the output frequency of the modulator. The mode is set
using Band Switch 2 (pin 12).
Pin 12 = High
→ Oscillator output frequency = modulator frequency
Pin 12 = Low
→ Oscillator output frequency = 1/2 modulator frequency
6. Band Swtich
The input circuitry of Band Switch 1 (pin 17) and Band Switch 2 (pin 12) are the same. A low setting requires a
voltage of less than 1 V at the pin. A high setting requires a voltage between VCC–1 and VCC at the pin. Settings of
low or high generate currents of ±50 A at pins 12 and 17.
Pin 12, 17 = High
→ Sink current = 50 A
Pin 12, 17 = Low
→ Source current = 50 A
Equivalent circuit of osc output and band switch blocks
The input circuitry of band switch 1 is same.
No. 5689-13/14
LA7790M
VCC
20 k
40 k
Band
switch2
OSC
OUTPUT
12
11
20 k
from
Divider
from
Divider
20 k
LPF
1 mA
300
Unit (resistance :
)
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