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參數(shù)資料
| 型號： | LP3944ISQ |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 顯示驅(qū)動器 |
| 英文描述： | RGB/White/Blue 8-LED Fun Light Driver |
| 中文描述： | LED DISPLAY DRIVER, QCC24 |
| 文件頁數(shù)： | 10/12頁 |
| 文件大?。?/td> | 249K |
| 代理商： | LP3944ISQ |
Application Notes
(Continued)
Address 0x05 (PWM1)
Bit #
Default value
PWM1 register determines the duty cycle of DIM1. The LED outputs are LOW (LED on) when the count is less than the value in PWM1 and HIGH (LED off) when
it is greater. If PWM1 is programmed with 0x00, LED output is always HIGH (LED off).
7
1
6
0
5
0
4
0
3
0
2
0
1
0
0
0
The duty cycle of DIM1 is: PWM1/256
Default value is 50% duty cycle.
BINARY FORMAT FOR SELECTOR REGISTERS — ADDRESS 0x06 to 0x07
Address 0x06 (LS0)
Bit #
Default value
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
B1
B0
B1
B0
B1
B0
B1
B0
LED3
LED2
LED1
LED0
Address 0x07 (LS1)
Bit #
Default value
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
0
B1
B0
B1
B0
B1
B0
B1
B0
LED7
LED6
LED5
LED4
LED States With Respect To Values in "B1" and "B0"
B1
0
B0
0
Function
Output Hi-Z
(LED off)
Output LOW
(LED on)
Output dims
(DIM0 rate)
Output dims
(DIM1 rate)
0
1
1
0
1
1
Programming Example:
Dim LEDs 0 to 7 at 1 Hz at 25% duty cycle
Step 1: Set PSC0 to achieve DIM0 of 1s
Step 2: Set PWM0 duty cycle to 25%
Step 3: Set PSC1 to achieve DIM1 of 0.2s
Step 4: Set LEDs 0 to 7 to point to DIM0
Step
Description
Register Name
PSC0
Set to (Hex)
0x09F
1
Set DIM0 = 1s
1 = (PSC0 + 1)/160
PSC0 = 159
Set duty cycle to 25%
Duty Cycle = PWM0/256
PWM0 = 64
Set DIM1 = 0.2s
0.2 = (PSC1 + 1)/160
PSC1 = 31
LEDs 0 to 7
Output = DIM0
2
PWM0
0x40
3
PSC1
0x1F
4
LS0, LS1
LS0 = 0xAA
LS1 = 0xAA
L
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| LP3944ISQX | RGB/White/Blue 8-LED Fun Light Driver |
| LP3944 | RGB/White/Blue 8-LED Fun Light Driver |
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| LP3945ILD | Battery Charge Management System |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LP3944ISQ/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3944ISQEV | 功能描述:電源管理IC開發(fā)工具 LP3944 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| LP3944ISQEV/NOPB | 制造商:Texas Instruments 功能描述:Evaluation Board For LED Driver 8Segment 2.5V/3.3V/5V T/R |
| LP3944ISQX | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
| LP3944ISQX/NOPB | 功能描述:LED照明驅(qū)動器 RoHS:否 制造商:STMicroelectronics 輸入電壓:11.5 V to 23 V 工作頻率: 最大電源電流:1.7 mA 輸出電流: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SO-16N |
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