参数资料
| 型号： | AP6502SP-13 |
| 厂商： | Diodes Inc |
| 文件页数： | 11/15页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK SYNC ADJ 2A 8SO |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 0.925 V ~ 16 V |
| 输入电压： | 4.75 V ~ 18 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 340kHz |
| 电流 - 输出： | 2A |
| 同步整流器： | 是 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SO 裸露焊盘 |
| 其它名称： | AP6502SP-13DIDKR |
AP6502
Applications Information (cont.)
Inductor (cont.)
Peak current determines the required saturation current rating, which influences the size of the inductor. Saturating the inductor decreases
the converter efficiency while increasing the temperatures of the inductor and the internal MOSFETs. Hence choosing an inductor with
appropriate saturation current rating is important.
A 1μH to 10μH inductor with a DC current rating of at least 25% percent higher than the maximum load current is recommended for most
applications.
For highest efficiency, the inductor’s DC resistance should be less than 200m ? . Use a larger inductance for improved efficiency under light
load conditions.
Input Capacitor
The input capacitor reduces the surge current drawn from the input supply and the switching noise from the device. The input capacitor has
to sustain the ripple current produced during the on time on the upper MOSFET. It must hence have a low ESR to minimize the losses.
The RMS current rating of the input capacitor is a critical parameter that must be higher than the RMS input current. As a rule of thumb,
select an input capacitor which has RMs rating that is greater than half of the maximum load current.
Due to large dI/dt through the input capacitors, electrolytic or ceramics should be used. If a tantalum must be used, it must be surge
protected. Otherwise, capacitor failure could occur. For most applications, a 4.7μF ceramic capacitor is sufficient.
Output Capacitor
The output capacitor keeps the output voltage ripple small, ensures feedback loop stability and reduces the overshoot of the output voltage.
The output capacitor is a basic component for the fast response of the power supply. In fact, during load transient, for the first few
microseconds it supplies the current to the load. The converter recognizes the load transient and sets the duty cycle to maximum, but the
current slope is limited by the inductor value.
Maximum capacitance required can be calculated from the following equation:
ESR of the output capacitor dominates the output voltage ripple. The amount of ripple can be calculated from the equation below:
Vout capacitor = Δ I inductor * ESR
An output capacitor with ample capacitance and low ESR is the best option. For most applications, a 22μF ceramic capacitor will be
sufficient.
L(I out +
Δ I inductor 2
( Δ V + V out ) ? V out 2
Where Δ V is the maximum output voltage overshoot.
C o =
2
2
)
AP6502
Document Number: DS35423 Rev. 9 - 2
11 of 15
www.diodes.com
January 2013
? Diodes Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AP6503 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:340kHz 23V 3A SYNCHRONOUS DC/DC BUCK CONVERTER |
| AP6503ASP-13 | 功能描述:直流/直流开关转换器 240kHz 23V 2A Synch DC/DC Buck Conv 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 |
| AP6503SP-13 | 功能描述:直流/直流开关转换器 SMPS Converter HV POWER SUPPLY 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 |
| AP6507 | 制造商:DIODES 制造商全称:Diodes Incorporated 功能描述:500 kHz 18V 3A SYNCHRONOUS DC/DC BUCK CONVERTER |
| AP6507SP-13 | 功能描述:直流/直流开关转换器 SWITCHING REG CONV POWER SUPPLY 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 |
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