Datasheet > AV34063S

AV34063S

更新时间： 2022-12-17 01:59:51

品牌	Logo	应用领域
AVICTEK		稳压器开关
页数	文件大小	规格书
8页	258K
描述
1.5A,Step-Up/Down Inverting Switching Regulators

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AV34063S 数据手册

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AV34063

Note 5 : If the output switch is driven into hard saturation (non-Darlington configuration) at low switch

currents (≤300mA) and high driver currents (≥30mA), it may take up to 2.0µs to come out of sturation.

This condition will shorten the off time at frequencies ≥30KHz, and is magnified at high temperatures.

This condition does not occur with a darlington configuration, since the output switch cannot saturate.

If a non-darlington is used, the following output drive condition is recommended.

Figure13. Design Formula Table

V_sat=Saturation voltage of the output switch.

V_F=Forward voltage drop of the output rectifier.

The following power supply characteristics must be chosen:

V_in-Nominal input voltage.

V_out-Desired output voltage, V_out= 1.25(1+R2/R1).

I_out- Desired output current.

F_min-Minimum desired output switching frequency at the selected valued of Vin an Io.

V_ripple(p-p)- Desired peak-to-peak output ripple voltage.In practice, the calculated capacitor

value will need to be increased due to its equivalent series resistance and board layout.The

ripple voltage should be kept to a low value since it will directiy affect the line and load

regulation.

Website: http://www.avictek.com

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