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参数资料
| 型号： | VP513 |
| 厂商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification |
| 中文描述： | CRT显示器视频输出放大器：高电压，宽带放大 |
| 文件页数： | 5/8页 |
| 文件大小： | 165K |
| 代理商： | VP513 |
Thermal Design for the VP513
Since the VP513 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 (Tr1) = 45°C/W/θj-c (Tr2) to (Tr4) = 35°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 = 70 MHz (clock), then the chips with the largest loss will be transistors 3 and 4 (Tr3
and Tr4) and that loss will be about 1/4 of the total loss.Thus from the Pd for a single channel we have:
Pc (Tr3) 70 MHz = Pd (1CH) 70 MHz
× 1/4.......................................... (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. 5331-5/8
VP513
相关PDF资料 |
PDF描述 |
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| VP553 | CRT Display Video Output Amplifier for High-Voltage,Wideband Application(应用于高电压，宽带的CRT显示视频输出放大器) |
| VP603 | CRT Display Video Output Amplifier for High-Voltage,Wideband Application(应用于高电压，宽带的CRT显示视频输出放大器) |
| 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 |
| VPB1-A1C-40M000 | CRYSTAL OSCILLATOR, CLOCK, 40 MHz, HCMOS/TTL OUTPUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| VP520 | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:PAL/NTSC to CIF/QCIF Converter |
| VP520CGGGWR | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Video Converter Circuit |
| VP520CGGH1R | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Video Converter Circuit |
| VP520S | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:PAL/NTSC to CIF/QCIF Converter |
| VP520SCG | 制造商:MITEL 制造商全称:Mitel Networks Corporation 功能描述:PAL/NTSC to CIF/QCIF Converter |
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