 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LP8866S-Q1 Datasheet(PDF) 25 Page - Texas Instruments |
|
||||||||||||||||||||||||||||||
LP8866S-Q1 Datasheet(HTML) 25 Page - Texas Instruments |
|
|
25 / 82 page  load frequency, which can move potential capacitor noise above the audible band while still keeping PWM frequency low to support a higher dimming ratio. When the LP8866S-Q1 device is firstly powered on, the string configuration is configured by the LED_SET resistor and the phases of each channel are automatically configured. The LED string configuration must not be changed unless the LP8866S-Q1 is powered off in shutdown state. The unused LEDx pins should be tied to ground. Table 7-6. LED Output String Configuration R_LED_SET (kΩ) CONFIGURATION OUT1 OUT2 OUT3 OUT4 OUT5 OUT6 AUTOMATIC PHASE SHIFT 3.92 6 Channels 150 mA 150 mA 150 mA 150 mA 150 mA 150 mA 60° 4.75 5 Channels 150 mA 150 mA 150 mA 150 mA 150 mA (Tied to GND) 72° 5.76 4 Channels 150 mA 150 mA 150 mA 150 mA (Tied to GND) (Tied to GND) 90° 7.87 3 Channels 150 mA 150 mA 150 mA (Tied to GND) (Tied to GND) (Tied to GND) 120° 11 2 Channels 150 mA 150 mA (Tied to GND) (Tied to GND) (Tied to GND) (Tied to GND) 180° 17.8 3 Channels 300 mA 300 mA 300 mA 120° 42.2 2 Channels 450 mA 450 mA 180° 124 1 Channels 900 mA None 7.3.7.3 LED Output PWM Clock Generation The LED PWM frequency is asynchronous from the input PWM frequency. The LED PWM frequency is generated from the internal 20-MHz oscillator and can be set to eight discrete frequencies from 152 Hz to 19.531 kHz. The PWM dimming resolution is highest when the lowest PWM frequency is used. The PWM_FSET resistor determines the LED PWM frequency based on Table 7-8. PWM resolution in Table 7-8 is with PWM dither disabled. 7.3.8 Brightness Control The LP8866S-Q1 supports global brightness control for all LED strings through either duty cycle input on PWM pin or register by I2C bus. An internal 20-MHz clock is used for generating PWM outputs. 7.3.8.1 Brightness Control Signal Path The BRT_MODE register selects whether the input to the display brightness path is the PWM input pin or DISP_BRT register. PWM input control will be the default setup after power on. The brightness control signal path diagram is shown in Figure 7-9 The display brightness path has sloper function that can be enabled. By default the sloper function is enabled. The sloper and dither function also can be programmable by I2C control. The sloper function is described in Section 7.3.8.7, and the dither function is described in Section 7.3.8.9. www.ti.com LP8866S-Q1 SNVSBD1A – AUGUST 2020 – REVISED FEBRUARY 2021 Copyright © 2021 Texas Instruments Incorporated Submit Document Feedback 25 Product Folder Links: LP8866S-Q1 |
Similar Part No. - LP8866S-Q1_V01 |
|
Similar Description - LP8866S-Q1_V01 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List 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 |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
