米6体育平台手机版

SLVSH48A May 2024 – September 2024 TPS7H1121-SP

PRODMIX

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请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)

HFT|22

散热焊盘机械数据 (封装 | 引脚)

订购信息

9.2.2.2 Output Voltage Accuracy

To determine the overall output voltage accuracy, refer to the device voltage accuracy V_ACC from the Section 6.5, the top and bottom feedback resistors (R_FB(Top) and R_FB(BOT)).

Equation 7.

{S y s t e m}_{(e r r o r)} = V_{A C C} + R_{(e r r o r)}

When the input voltage V_IN is below 3V, the error amp is operating with a reduced head room such that output accuracy performance is widened to ±1.8%; for this example V_IN is above 3V, therefore the standard ±1.5% accuracy can be applied.

For the selected 0.1% feedback resistors, the calculated error is shown in Equation 8, this assumes an uncorrelated error and the errors are added as the sum of the resistors' error squared.

Equation 8.

R_{(e r r o r)} = \sqrt[2]{({0.1}^{2} + {0.1}^{2})} = \pm 0.14 %

The negative and positive system error's are summed with the results for this example shown below in equations Equation 9 and Equation 10.

Equation 9.

{S y s t e m}_{(n e g_e r r o r)} = - 1.5 % + - 0.14 %

Equation 10.

{S y s t e m}_{(p o s_e r r o r)} = 1.5 % + 0.14 %

Adding the following errors together results in an accuracy of ±1.64%.