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【STM32】基于TPS61165芯片的LED驱动电路

news 2026/7/16 16:46:54

一、简单介绍

二、cubeMX配置

开调试口

开PWM

时钟

按键

三、代码编写

四、效果

五、备注

六、工程链接

一、简单介绍

TPS61165是一款白色LED灯驱动芯片，输入电压3~18V，开关电流最大1.2A。具有LED开路保护，可以PWM调光或者高低电平控制。

参考芯片推荐设计，原理图如下

选择0.62欧姆电阻，则串联电流等于0.2/0.62=322mA

VBUS连接12V输入电源，笔者选用STM32F103C8T6作为MCU，LED_CTRL1连接单片机的PA7引脚

使用两个按键设置占空比（亮度）

MCU电路

二、cubeMX配置

开调试口

开PWM

设置PWM波频率为20khz，初始占空比10%

时钟

开启外部高速时钟

按键

选择输入上拉

笔者使用ST7789屏幕观测，因此还启用了SPI接口

三、代码编写

主要涉及到TFT彩屏，按键输入，定时器PWM输出的内容，主要代码如下

/* Includes ------------------------------------------------------------------*/ #include "main.h" #include "dma.h" #include "spi.h" #include "tim.h" #include "gpio.h" /* Private includes ----------------------------------------------------------*/ /* USER CODE BEGIN Includes */ #include "keydrv.h" #include "st7789.h" /* USER CODE END Includes */ /* Private typedef -----------------------------------------------------------*/ /* USER CODE BEGIN PTD */ /* USER CODE END PTD */ /* Private define ------------------------------------------------------------*/ /* USER CODE BEGIN PD */ /* USER CODE END PD */ /* Private macro -------------------------------------------------------------*/ /* USER CODE BEGIN PM */ /* USER CODE END PM */ /* Private variables ---------------------------------------------------------*/ /* USER CODE BEGIN PV */ /* USER CODE END PV */ /* Private function prototypes -----------------------------------------------*/ void SystemClock_Config(void); /* USER CODE BEGIN PFP */ /* USER CODE END PFP */ /* Private user code ---------------------------------------------------------*/ /* USER CODE BEGIN 0 */ int8_t light = 10; uint8_t str[20]; /* USER CODE END 0 */ /** * @brief The application entry point. * @retval int */ int main(void) { /* USER CODE BEGIN 1 */ /* USER CODE END 1 */ /* MCU Configuration--------------------------------------------------------*/ /* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init(); /* USER CODE BEGIN Init */ /* USER CODE END Init */ /* Configure the system clock */ SystemClock_Config(); /* USER CODE BEGIN SysInit */ /* USER CODE END SysInit */ /* Initialize all configured peripherals */ MX_GPIO_Init(); MX_DMA_Init(); MX_SPI2_Init(); MX_TIM3_Init(); /* USER CODE BEGIN 2 */ KeyDrv_Config(); ST7789_Init(); ST7789_Clear(BLACK); HAL_TIM_Base_Start(&htim3); HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2); /* USER CODE END 2 */ /* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { if (button[0].buttonAction == CLICK_SINGLE) { button[0].buttonAction = CLICK_NULL; light += 10; if (light > 100) { light = 100; } __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, light); } if (button[1].buttonAction == CLICK_SINGLE) { button[1].buttonAction = CLICK_NULL; light -= 10; if (light < 0) { light = 0; } __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_2, light); } sprintf(str, "light:%d ", light); ST7789_ShowString(0, 140, str, Font_16x26, ST7789_RGB565(0xFFFF), BLACK); /* USER CODE END WHILE */ /* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ }