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參數(shù)資料
| 型號(hào)： | VP503 |
| 廠商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification |
| 中文描述： | CRT顯示器視頻輸出放大器：高電壓，寬帶放大 |
| 文件頁(yè)數(shù)： | 10/11頁(yè) |
| 文件大?。?/td> | 236K |
| 代理商： | VP503 |
Thermal Design for the VP503
We recommended that the VP503 be used with the operating case temperature, Tc, under 100°C. Since the VP503
includes three channels, we first consider a single channel. The chip temperature of each transistor under actual operating
conditions is determined using the following formula.
Tj = (Tri) =
θj-c (Tri) × Pc (Tri) + Tc + Ta [°C] .................................. (1)
θj-c (Tri): Thermal resistance of an individual transistor
Pc (Tri):
Collector loss for an individual transistor
Tc:
Case temperature rise
Ta:
Ambient temperature
The
θj-c(Tri) for each chip is:
θj-c (Tr2) to (Tr4) = 30°C/W.................................................................. (2)
Although the loss for each transistor in a Video Pack varies with frequency and is not uniform, if we assume that the
maximum operating frequency, f = 85 MHz (clock), then the chips with the largest loss will be transistor 3 and that loss
will be about 1/4 of the total loss.Thus from the Pd for a single channel we have:
Pc (Tr3) f = 85 MHz = Pd (1CH) f = 85 MHz
× 0.25 [W] ..................... (3)
Here, we must select a heat sink with a capacity
θh such that the Tj of these transistors does not exceed 150°C. Equation
(4) below gives the relationship between
θh and Tc.
Tc = Pd (TOTAL) × θh ........................................................................ (4)
The required
θh is calculated using this equation and equation (1).
No. 4933-8/11
VP503
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| VP513 | CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification |
| VP553 | CRT Display Video Output Amplifier for High-Voltage,Wideband Application(應(yīng)用于高電壓，寬帶的CRT顯示視頻輸出放大器) |
| VP603 | CRT Display Video Output Amplifier for High-Voltage,Wideband Application(應(yīng)用于高電壓，寬帶的CRT顯示視頻輸出放大器) |
| VPA1-A3C-FREQ | CRYSTAL OSCILLATOR, CLOCK, 1.544 MHz - 125 MHz, HCMOS/TTL OUTPUT |
| VPB1-E3C-40M000 | CRYSTAL OSCILLATOR, CLOCK, 40 MHz, HCMOS/TTL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| VP-50-4811C | 制造商:KSS 功能描述:Pack |
| VP-50-48BK | 制造商:KSS 功能描述:Pack |
| VP-50-48C | 制造商:KSS 功能描述:Pack |
| VP-50-48NA | 制造商:KSS 功能描述:Pack |
| VP-50-811NA | 制造商:KSS 功能描述:Pack |
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