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参数资料
| 型号： | SC668ULTRT |
| 厂商： | Semtech |
| 文件页数： | 18/46页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR LMU 8CH MLPQUT20 |
| 特色产品： | Semtech sc667 and sc668 |
| 标准包装： | 1 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 12 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，LED 闪烁器，照明管理装置（LMU） |
| 频率： | 400kHz |
| 电源电压： | 2.9 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-UFQFN 裸露焊盘 |
| 供应商设备封装： | 20-MLPQ（3x3） |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 其它名称： | SC668ULDKR |
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SC668
Applications Information (continued)
Notes for figures on previous page
t 1 = start of cycle
t 2 = end of cycle
t START = The time that the bank’s current remains at the start value.
t TARGET = The time that the bank’s current remains at the target value.
t BREATHE = The time that the bank’s current will continue to increase or
decrease during a breathe cycle. Breathe time is determined by multi-
plying the breathe rate by the number of steps (from Table1). Breathe
rate is a group dependent value of the effect rate register 0Fh.
t FADE_IN = The fade time of increasing bank current, determined by
multiplying the fade rate by the number of steps (from Table 1). Fade
rate is a group dependent value of the effect rate register 0Fh.
t FADE_OUT = The fade time of decreasing bank current, determined by
multiplying the fade rate by the number of steps (from Table 1). Fade
rate is a group dependent value of the effect rate register 0Fh. t FADE_IN
is always equal to t FADE_OUT .
I BL_START = The bank current at the start of the cycle. This is the bank
dependent value of register 02h, 03h, 04h, or 05h.
I BL_TARGET = The bank current at the end of the cycle. This is the bank
dependent value of register 06h, 07h, 08h, or 09h.
I BL_INITIAL = The bank dependent value of register 02h, 03h, 04h, or 05h.
I BL_FINAL = The bank dependent value of register 02h, 03h, 04h, or 05h.
NOTE: “START ” and “TARGET ” subscripts apply only to blink and
breathe effects which require a target value to complete a cycle.
“INITIAL” and “FINAL” subscripts apply when changing a bank’s current
without use of the target registers.
18
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