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| 型号： | VP453 |
| 厂商： | Sanyo Electric Co.,Ltd. |
| 英文描述： | CRT Display Video Output Amplifier for High-Voltage,Wideband Application(应用于高电压，宽带的用于CRT显示视频输出放大器) |
| 中文描述： | CRT显示器视频放大器的高输出电压，宽带应用（应用于高电压，宽带的用于阴极射线管显示视频输出放大器） |
| 文件页数： | 3/5页 |
| 文件大小： | 90K |
| 代理商： | VP453 |
Thermal Design
Thermal design requires that the two conditions Tj (max)
≤ 150°C and Tc ≤ 100°C be met.
(a) Concerning Tj (max), the chip temperature Tj for each transistor is given by equation (1).
Tj = (Tri) =
θj–c (Tri) × P
C (Tri) + Tc + Ta (°C) ................................................(1)
θj–c (Tri): The thermal resistance of each transistor chip itself
PC (Tri): The collector loss for each transistor
Tc: Increase in the case temperature
Ta: Ambient temperature
θj–c (Tri) for each chip will be:
θj–c (Tr1) to (Tr4) = 35°C/W ................................................................................(2)
The loss in transistors in a video pack varies with frequency. The loss increases with the frequency.
For example, if the maximum frequency will be 120 MHz (clock), then the transistors with the largest losses will be
transistors 3 and 4 in the emitter-follower (EF) stage. From the Pd – f (clock) figure, we see that that loss will be 25%
of the total for a single channel. That is:
PC (EF stage) f = 120 MHz = Pd (1ch) f = 120 MHz × 0.25 [W]..................................(3)
The thermal design must assure that Tj does not exceed 150°C at this time.
(b) Concerning Tc(max), the relationship between
θh and Tc is:
Tc = Pd (total) × θh .............................................................................................(4)
Taking the increase due to Ta into account, the condition the thermal design must meet becomes Tc =
Tc + Ta <
100°C.
Next we design thermal conditions for the VP453 that meet the conditions in sections (a) and (b) above.
No. 5477-3/5
VP453
相关PDF资料 |
PDF描述 |
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| VP503 | CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification |
| VP513 | CRT Display Video Output Amplifier: High-Voltage, Wideband Amplification |
| 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 |
相关代理商/技术参数 |
参数描述 |
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| VP454CAB47 | 制造商:SRC Devices 功能描述: |
| VP45AC1B26 | 制造商:SRC Devices 功能描述: |
| VP4BK | 功能描述:电缆组件 VIDEO PATCH CORD BLK RoHS:否 制造商:Molex 产品:Power Assemblies 类型:Cable Assembly 连接器端口 A:No Connector 连接器端口 A 管脚计数:4 连接器端口 B:No Connector 连接器端口 B 管脚计数: 型式:Male 线规 - 美国线规（AWG）:20, 28 长度:0.305 m 颜色:Black, Red |
| VP4BKX | 功能描述:PATCHCORD VIDEO STD 4' BLACK RoHS:是 类别:电缆组件 >> 视频 - DVI，HDMI，WECo 系列:VP 标准包装:1 系列:- 连接器类型:Mini-WECo 公形至 WECo 公形 长度:8.0'（2.44m） 缆线类型:圆形 颜色:黑 屏蔽:无屏蔽 使用:- |
| VP4BL | 功能描述:电缆组件 VIDEO PATCH CORD BLU RoHS:否 制造商:Molex 产品:Power Assemblies 类型:Cable Assembly 连接器端口 A:No Connector 连接器端口 A 管脚计数:4 连接器端口 B:No Connector 连接器端口 B 管脚计数: 型式:Male 线规 - 美国线规（AWG）:20, 28 长度:0.305 m 颜色:Black, Red |
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