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参数资料
| 型号： | NCV5171EDR2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 16/19页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG 1.5A 8SOIC |
| 标准包装： | 2,500 |
| 类型： | 升压（升压），反相，回扫，正向转换器，Sepic |
| 输出数： | 1 |
| 输入电压： | 2.7 V ~ 30 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 280kHz |
| 电流 - 输出： | 1.5A |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
| 供应商设备封装： | 8-SOICN |
NCV5171, NCV5173
TJ + TA ) (PD q JA)
where:
transitions that can cause problems. Therefore the following
guidelines should be followed in the layout.
T J = IC or FET junction temperature ( ? C);
T A = ambient temperature ( ? C);
P D = power dissipated by part in question (W);
q JA = junction ? to ? ambient thermal resistance ( ? C/W).
For the NCV5171/73, q JA =165 ? C/W.
Once the designer has calculated T J , the question of
whether the NCV5171/73 can be used in an application is
settled. If T J exceeds 150 ? C, the absolute maximum
allowable junction temperature, the NCV5171/73 is not
suitable for that application.
If T J approaches 150 ? C, the designer should consider
possible means of reducing the junction temperature.
Perhaps another converter topology could be selected to
reduce the switch current. Increasing the airflow across the
surface of the chip might be considered to reduce T A .
Circuit Layout Guidelines
In any switching power supply, circuit layout is very
important for proper operation. Rapidly switching currents
combined with trace inductance generates voltage
1.
2.
3.
In boost circuits, high AC current circulates within the
loop composed of the diode, output capacitor, and
on ? chip power transistor. The length of associated
traces and leads should be kept as short as possible. In
the flyback circuit, high AC current loops exist on both
sides of the transformer. On the primary side, the loop
consists of the input capacitor, transformer, and
on ? chip power transistor, while the transformer,
rectifier diodes, and output capacitors form another
loop on the secondary side. Just as in the boost circuit,
all traces and leads containing large AC currents
should be kept short.
Separate the low current signal grounds from the
power grounds. Use single point grounding or ground
plane construction for the best results.
Locate the voltage feedback resistors as near the IC as
possible to keep the sensitive feedback wiring short.
Connect feedback resistors to the low current analog
ground.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCV5173EDR2G | 功能描述:直流/直流开关转换器 1.5A 560KHZ BOOST RG RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| NCV5230DR2G | 功能描述:运算放大器 - 运放 LOW VOLTAGE OP-AMP RoHS:否 制造商:STMicroelectronics 通道数量:4 共模抑制比（最小值）:63 dB 输入补偿电压:1 mV 输入偏流（最大值）:10 pA 工作电源电压:2.7 V to 5.5 V 安装风格:SMD/SMT 封装 / 箱体:QFN-16 转换速度:0.89 V/us 关闭:No 输出电流:55 mA 最大工作温度:+ 125 C 封装:Reel |
| NCV5500 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:500 mA Linear Regulator |
| NCV5500DADJR2G | 功能描述:低压差稳压器 - LDO LDO REG 500mA ADJ RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| NCV5500DT15RKG | 功能描述:低压差稳压器 - LDO ANA LDO REG RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
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