主题中讨论的其他器件： LP5030、 LP5024
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我正在研发一款医疗设备、我们正努力将其推向市场、这是显而易见的原因。 我们的多个电路板存在问题、我需要您的帮助。
LP5036连接到十(10)个 RGB LED。 LED 上的每个元件在 LP5036上获得其自己的输出通道。 是的、我们本来可以使用 LP5030、但 LP5036更易于使用、因此我们现在使用它。
问题：所有红色 LED 持续亮起、对于包含10个红色元件的整个电路板、电流约为1mA。 这将是大约100uA 的泄漏电流、远高于规格。 即使电路板与 I2C 总线完全断开连接、也会发生这种情况；仅为 VLED 和 VCC 供电。
Riref 设置为10k；
每个 LED 均为 Kingbright APFA3010SEEZGKQBKC、正向电压为2V 红色、3.3V 绿色、3.3V 蓝色。 红色引脚和通用引脚的物理位置在封装的两侧、因此
VCC 为3.3V。 LED 由3节"C"电池供电、标称电压为4.5V。
通过3.3V 电压为 LVCC 和 LED 供电(作为测试)会产生1.07mA 的电流消耗。 远远高于指定的泄漏电流。
已尝试在 DEVICE_CONFIG0中关闭 CHIP_EN、未更改
已尝试在 DEVICE_CONFIG1中调整 LED_GLOBAL_OFF、未更改
已尝试切换硬件 EN 引脚、未更改。
已尝试将 Riref 的值减半(至5k)、但没有更改。
如果只是随机焊接问题、那么我本来希望其他通道(蓝色和绿色)受到影响。 我也希望看到一些频道受到影响、但并非所有频道都受到影响。
e2e.ti.com/.../LED-board-using-LP5036.pdf
启动时的寄存器：
LP205xx 寄存器值：
[0] DEVICE_CONFIG0 = 0x00 [1] DEVICE_CONFIG1 = 0x3C [2] LED_CONFIG0 = 0x00 [3] LED_CONFIG1 = 0x00
[4] Bank_Bright = 0xFF [5] Bank_A_color = 0x00 [6] Bank_B_color = 0x00 [7] Bank_C_color = 0x00
[8] LED0_Bright = 0xFF [9] LED1_Bright = 0xFF [10] LED2_Bright = 0xFF [11] LED3_Bright = 0xFF
[12] LED4_Bright = 0xFF [13] LED5_Bright = 0xFF [14] LED6_Bright = 0xFF [15] LED7_Bright = 0xFF
[16] LED3_Bright = 0xFF [17] LED2_Bright = 0xFF [18] LED10_Bright = 0xFF [19] LED11_Bright = 0xFF
[20] OUT0_color = 0x00 [21] OUT1_color = 0x00 [22] OUT2_color = 0x00 [23] OUT3_color = 0x00
[24] OUT4_color = 0x00 [25] OUT5_color = 0x00 [26] OUT6_color = 0x00 [27] OUT7_color = 0x00
[28] OUT8_color = 0x00 [29] OUT9_color = 0x00 [30] OUT10_color = 0x00 [31] OUT11_color = 0x00
[32] OUT12_color = 0x00 [33] OUT13_color = 0x00 [34] OUT14_color = 0x00 [35] OUT15_color = 0x00
[36] OUT16_color = 0x00 [37] OUT17_color = 0x00 [38] OUT18_color = 0x00 [39] OUT19_color = 0x00
[40] OUT20_color = 0x00 [41] OUT21_color = 0x00 [42] OUT22_color = 0x00 [43] OUT23_color = 0x00
[44] OUT24_color = 0x00 [45] OUT25_color = 0x00 [46] OUT26_color = 0x00 [47] OUT27_color = 0x00
[48] OUT28_color = 0x00 [49] OUT29_color = 0x00 [50] OUT30_color = 0x00 [51] OUT31_color = 0x00
[52] OUT32_color = 0x00 [53] OUT33_color = 0x00 [54] OUT34_color = 0x00 [55] OUT35_color = 0x00
关闭 LED 全局关闭后：
问题仍然存在：
LP205xx 寄存器值：
[0] DEVICE_CONFIG0 = 0x40 [1] DEVICE_CONFIG1 = 0x01 [2] LED_CONFIG0 = 0x00 [3] LED_CONFIG1 = 0x00
[4] Bank_Bright = 0xFF [5] Bank_A_color = 0x00 [6] Bank_B_color = 0x00 [7] Bank_C_color = 0x00
[8] LED0_Bright = 0xFF [9] LED1_Bright = 0xFF [10] LED2_Bright = 0xFF [11] LED3_Bright = 0xFF
[12] LED4_Bright = 0xFF [13] LED5_Bright = 0xFF [14] LED6_Bright = 0xFF [15] LED7_Bright = 0xFF
[16] LED3_Bright = 0xFF [17] LED2_Bright = 0xFF [18] LED10_Bright = 0xFF [19] LED11_Bright = 0xFF
[20] OUT0_color = 0x00 [21] OUT1_color = 0x1F [22] OUT2_color = 0x00 [23] OUT3_color = 0x00
[24] OUT4_color = 0x1F [25] OUT5_color = 0x00 [26] OUT6_color = 0x00 [27] OUT7_color = 0x1F
[28] OUT8_color = 0x00 [29] OUT9_color = 0x00 [30] OUT10_color = 0x1F [31] OUT11_color = 0x00
[32] OUT12_color = 0x00 [33] OUT13_color = 0x1F [34] OUT14_color = 0x00 [35] OUT15_color = 0x00
[36] OUT16_color = 0x1F [37] OUT17_color = 0x00 [38] OUT18_color = 0x00 [39] OUT19_color = 0x1F
[40] OUT20_color = 0x00 [41] OUT21_color = 0x00 [42] OUT22_color = 0x1F [43] OUT23_color = 0x00
[44] OUT24_color = 0x00 [45] OUT25_color = 0x1F [46] OUT26_color = 0x00 [47] OUT27_color = 0x00
[48] OUT28_color = 0x1F [49] OUT29_color = 0x00 [50] OUT30_color = 0x00 [51] OUT31_color = 0x00
[52] OUT32_color = 0x00 [53] OUT33_color = 0x00 [54] OUT34_color = 0x00 [55] OUT35_color = 0x00
[56]复位= 0x00……(tick)#… (勾选)#。
