K230D 0.8V current requirement - less than 2A total?

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hardware k230d

问题描述

The Hardware design guidelines for the K230 https://www.kendryte.com/k230/en/dev/00_hardware/K230_Hardware_Design_Guide.html lists for the core module power supply:

VDD0P8_CORE: 2250mA, recommended at least 3A DC/DC
VDD0P8_CPU: 1000mA, recommended at least 2A DC/DC
VDD0P8_KPU: 3000mA, recommended at least 4A DC/DC

However, the schematics of the k230 Zero board https://drive.google.com/file/d/1OL0th-8sUaoSTe_JDoHtI3H66p_a0VLr/view (or alternative baidu clowd link: https://pan.baidu.com/s/1jkMmp628suSp_lUphqsuJg?pwd=8888 (PIN code: 8888))shows that for VDD0P8_CORE + VDD0P8_CPU + VDD0P8_KPU only a single TLV62569 is used, which has a maximum output current of 2A https://www.ti.com/lit/ds/symlink/tlv62569.pdf?ts=1776565078299

Are the current requirements in the hardware design guidelines not applicable for the k230D - or how does the k230 Zero manage to supply all three 0.8V cores with a single 2A DC/DC buck converter?

硬件板卡

K230 Zero

硬件板卡

K230 Zero

greengnu1
1 Answers

VDD0P8_CORE: 2250mA, recommended at least 3A DC/DC
VDD0P8_CPU: 1000mA, recommended at least 2A DC/DC
VDD0P8_KPU: 3000mA, recommended at least 4A DC/D
This set of data represents an extreme case. In real applications on the K230D, such as face detection and gesture detection, the current consumption is not that high. The VDD0V8(VDD0P8_CORE + VDD0P8_CPU + VDD0P8_KPU) current can be estimated at about 1.2A. Therefore, the current capability of the TLV62569 is sufficient.

wr_canaan21