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| 型号： | SC667ULTRT |
| 厂商： | Semtech |
| 文件页数： | 41/47页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR LMU 7CH MLPQUT20 |
| 特色产品： | Semtech sc667 and sc668 |
| 标准包装： | 1 |
| 拓扑： | 线性（LDO），PWM |
| 输出数： | 11 |
| 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： | SC667ULDKR |
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SC667
Register Map (continued)
ADC Function Register (12h)
This register is used to enable the functions of the ADC
and store related status bits. The ADC converts the analog
output voltage signal of an ALS (Ambient Light Sense)
circuit and stores the digital conversion in the ADC output
AD OUT (register 13h). The data may be used to automati-
cally adjust the brightness of bank #1 backlights in
response to changes in ambient lighting conditions.
AD_CMP [D7]
This bit indicates the comparison of AD OUT (register 13h) to
both AD RISE (register 14h) and AD FALL (register 15h). When
AD OUT exceeds AD RISE , AD_CMP = 1. When AD OUT falls below
AD FALL , AD_CMP = 0.
AD_INT [D6]
This bit is set when the AD_CMP bit [D7] changes state. If
the AD_SATEN [D5] bit is set, AD_INT bit [D6] may also be
used to indicate an overflow or underflow in AD OUT (register
13h). This bit is cleared when ADC function register (12h) is
read, or when writing INT_CLR bit [D2] equal to one.
AD_AUTO [D1]
When the AD_AUTO bit is high, the contents of the AD OUT ,
AD RISE , and AD FALL registers are compared and used to control
the brightness of the bank #1 backlights. AD OUT is compared
with two threshold values contained in registers AD RISE and
AD FALL . If AD OUT becomes greater than AD RISE , bank #1 will
change to the bank #1 target backlight setting of register
06h. If AD OUT becomes less than AD FALL , bank #1 will change
to the bank #1 backlight setting of register 02h.
When the AD_AUTO bit is low, the comparison of AD OUT to
AD RISE and AD FALL is disabled so that bank #1 does not react
to changes in the value of AD OUT , AD RISE , or AD FALL .
AD_EN [D0]
When the AD_EN bit is high, the ADC is activated and the
results of each conversion are stored in AD OUT (register 13h).
The functions of the AD_AUTO and AD_EN bits are shown
in Table 22.
Table 22 — ALS Function Enable Bits
AD_SATEN [D5]
This bit, when set, allows an underflow or overflow to gen-
erate an interrupt which sets the AD_INT bit [D6]. When
AD_SATEN = 1, an overflow or underflow condition in reg-
AD_AUTO AD_EN
0 0
Comments
ADC is disabled. Bank #1 will not change
brightness with ambient conditions.
ister 13h will set the AD_INT bit.
AD_OF [D4]
This bit indicates an overflow condition in register 13h.
This bit is set to one whenever AD OUT > F8h.
AD_UF [D3]
This bit indicates an underflow condition in register 13h.
This bit is set to one whenever AD OUT < 08h.
INT_CLR [D2]
0
1
1
1
0
1
ADC is enabled. ADC output is stored in
the AD OUT register. Bank #1 does not re-
spond to the AD OUT value.
ADC is disabled. Bank #1 current is set
to the start or target current. AD OUT is
compared to AD RISE and AD FALL registers.
A new value may be written to AD OUT via
the I 2 C interface.
ADC is enabled. Bank #1 current is set to
the start or target current. AD OUT is com-
pared to AD RISE and AD FALL registers.
Writing a one to this bit automatically resets bit AD_INT to
zero. INT_CLR resets itself and will always read as zero.
41
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC668 | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM Dimming, and 4 LDOs |
| SC668EVB | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:8 LED Light Management Unit Automatic Dropout Prevention , Ambient Light Sense Input, PWM Dimming, and 4 LDOs |
| SC668ULTRT | 功能描述:IC LED DRVR LMU 8CH MLPQUT20 RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 特色产品:LM3445 TRIAC Dimmable LED Driver 标准包装:55 系列:PowerWise® 恒定电流:是 恒定电压:- 拓扑:PWM，降压（降压） 输出数:1 内部驱动器:无 类型 - 主要:- 类型 - 次要:高亮度 LED（HBLED） 频率:30kHz ~ 1MHz 电源电压:8 V ~ 12 V 输出电压:- 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOICN 包装:管件 工作温度:-40°C ~ 125°C 产品目录页面:1285 (CN2011-ZH PDF) 其它名称:LM3445M |
| SC-67 | 制造商:JIFFY 功能描述:CORRUGATED BOX DW 24X18X18 PK15 制造商:JIFFY 功能描述:CORRUGATED BOX, DW, 24X18X18, PK15 |
| SC6750 | 制造商:Alltrade Tools LLC 功能描述:COMB. SET |
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