数据搜索系统,热门电子元器件搜索 |
|
LM36923 数据表(PDF) 11 Page - Texas Instruments |
|
|
LM36923 数据表(HTML) 11 Page - Texas Instruments |
11 / 47 page HWEN I2C ILED VIN tHWEN_I2C I2C Registers In Reset I2C Data Valid I2C Brightness Data Sent tBRT_DAC tDAC_LED PWM HWEN ILED VIN tHWEN_PWM tPWM_DAC tDAC_LED tDD_LED tPWM_STBY 11 LM36923H www.ti.com SNVSAF3A – FEBRUARY 2016 – REVISED FEBRUARY 2016 Product Folder Links: LM36923H Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 7.3 Feature Description 7.3.1 Enabling the LM36923H The LM36923H has a logic level input HWEN which serves as the master enable/disable for the device. When HWEN is low the device is disabled, the registers are reset to their default state, the I2C bus is inactive, and the device is placed in a low-power shutdown mode. When HWEN is forced high the device is enabled, and I2C writes are allowed to the device. 7.3.1.1 Current Sink Enable Each current sink in the device has a separate enable input. This allows for a 1-string, 2-string, or 3-string application. The default is with three strings enabled. Once the correct LED string configuration is programmed, the device can be enabled by writing the chip enable bit high (register 0x10 bit[0]), and then either enabling PWM and driving PWM high, or writing a non-zero code to the brightness registers. The default setting for the device is with the chip enable bit set to 1, PWM input enabled, and the device in linear mapped mode. Therefore, on power up once HWEN is driven high, the device enters the standby state and actively monitors the PWM input. After a non-zero PWM duty cycle is detected the LM36923H converts the duty cycle information to the linearly weighted 11-bit brightness code. This allows for operation of the device in a stand-alone configuration without the need for any I2C writes. Figure 15 and Figure 16 describe the start-up timing for operation with both PWM controlled current and with I2C controlled current. Figure 15. Enabling the LM36923H via PWM Figure 16. Enabling the LM36923H via I2C |
类似零件编号 - LM36923 |
|
类似说明 - LM36923 |
|
|
链接网址 |
隐私政策 |
ALLDATASHEETCN.COM |
ALLDATASHEET是否为您带来帮助? [ DONATE ] |
关于 Alldatasheet | 广告服务 | 联系我们 | 隐私政策 | 链接交换 | 制造商名单 All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |