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| 型号： | SC667ULTRT |
| 厂商： | Semtech |
| 文件页数： | 22/47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
Applications Information (continued)
General Purpose ADC
The ADI pin may also be used for general purpose ADC
functions. For example, a linear temperature sensor may
be added to the application circuit, and the SC667 may
provide temperature data or an over-temperature warning
flag. In this case, registers 13h, 14h, and 15h can be used
to store the ADC reading and set thresholds that will
trigger and interrupt output if the reading does not remain
between them.
IRQ Output
A hardware interrupt request function is provided by the IRQ
pin. This is an open-drain, active-low output that provides a
flag indicating that the ALS input has exceeded a threshold
level, or indicates that an overflow or underflow condition
exists. Refer to Figure 16 for a description of this function.
Interrupt is set
AD_INT ? 1
and
V IRQ ? 0 Volts
at the IRQ pin
have identical specifications, with a programmable output
ranging from 1.5V to 3.3V. LDO2 is specified to operate
with programmable output ranging from 1.2V to 1.8V. All
of the LDOs are low noise and can be used with noise sen-
sitive circuits.
LDO4 is internally connected to the ADC (Analog to Digital
Converter) to provide the reference voltage for the ADC.
LDO4 must be enabled for the ADC to function. When the
ALS function is used, LDO4 may also be used to provide
power to the external ALS circuit.
Shutdown Mode
The device is disabled when the EN pin is held low for the
shutdown time specified in the electrical characteristics
section. All registers are reset to default conditions at shut-
down. Typical current consumption in this mode is 0.1μA.
Sleep Mode
Sleep mode is activated when all backlights are off. This is
a reduced current mode that helps minimize overall
current consumption. In sleep mode, the I 2 C interface
continues to monitor its input for commands from the
host processor. All registers retain their settings in sleep
Bit
AD_CMP
changes
state
AD_OF = 1
or
AD_UF = 1
and
AD_SATEN
0 ? 1
AD_SATEN = 1
and
AD_OF
0 ? 1
or
AD_UF
0 ? 1
AD_SATEN = 0
Read
register 12h
or
Write
CLR_INT = 1
mode. Typical current consumption in this mode is 90μA.
Protection Features
The SC667 provides OT (Over-temperature) protection
and LDO current limiting to safeguard the device from
catastrophic failures.
Interrupt is reset
AD_INT ? 0
and
V IRQ ? V DD
at the IRQ pin
Figure 16 — IRQ Pin State Diagram
Programmable LDO Outputs
Four LDO (low dropout) regulators are included to supply
power to peripheral circuits. Each LDO output voltage
setting has ±3.5% accuracy over the line, load, and operat-
ing temperature ranges. Output current greater than
specification is possible at somewhat reduced accuracy
(refer to the typical characteristic section of this datasheet
for load regulation examples). LDO1, LDO3, and LDO4
Over-Temperature Protection
The OT protection circuit prevents the device from over-
heating and experiencing a catastrophic failure. When the
junction temperature exceeds 165°C, the device goes into
thermal shutdown with all outputs disabled until the junc-
tion temperature is reduced. All register information is
retained during thermal shutdown. Hysteresis of 30°C is
provided to ensure that the device cools sufficiently before
re-enabling.
LDO Current Limit
The device limits current at each LDO output pin. The
typical limit is 400mA, with a minimum limit rating of
200mA. The LDOs may be used for up to 200mA without
tripping the current limit.
22
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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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