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| 型号： | SP7616ER-L |
| 厂商： | Exar Corporation |
| 文件页数： | 8/11页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVER LOWSIDE 4CH 8DFN |
| 产品变化通告： | Obsolescence Notification 01/Jun/2010 |
| 标准包装： | 150 |
| 恒定电流： | 是 |
| 拓扑： | 线性（LDO），低端，PWM |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光，通用 |
| 电源电压： | 4.5 V ~ 30 V |
| 输出电压： | 30V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-VFDFN 裸露焊盘 |
| 供应商设备封装： | 8-DFN（3x2） |
| 包装： | 散装 |
S P 7 6 1 6
H i g h A c c u r a c y 4 - C h a n n e l L o w S i d e L E D D r i v e r f o r
C C F L R e p l a c e m e n t
V IN C ONSIDERATIONS (IMPORTANT)
The V IN pin of the SP7616 (Pin 1) needs to be
connected to the anode of the LED for proper
operation. If these are not tied together, the
part can get into a latch condition as a result
of improper sequencing.
A second way the part can get into a latch
condition is if the input voltage falls below
1.5V but does not fall below 0.5V before the
power is re-applied.
In both cases, the latch condition can be
“reset” by pulling the input voltage below 0.5V
for >3 seconds. This latch is similar to what
one might experience with a uC if a reset was
not asserted after a brown out condition.
U NUSED C HANNELS AND LED 2 C HANNEL
( PIN 7)
LED 2 channel should never be grounded or
left unconnected it should always be used
during operation. Other unused channels can
be tied to the ground to save on power
consumption.
S HORTED LED S
If all LEDs on a string are shorted, the LED
cathode voltage will be VIN. It is still a
working condition for this device but it
significantly increases the dissipated power.
At 20mA LED current and VIN = 30V
additional power dissipated in the package is
equal to 600mW that will increase die
temperature to 59°C/W x 0.6W = 35.4C,
where 59°C/W is the package thermal
resistance. Assuming that all other channels
are working at V LED =1.5V the die temperature
will be approximately 41°C above ambient
temperature and that decreases operating
temperature range. Also to protect the part if
too many LEDs are shorted, and the VLED
voltage becomes to high, making the part
dissipates too much power, the over
temperature protection will shut the part off
when the die temperature reaches
approximately 150°C.
O VER - TEMPERATURE PROTECTION
The SP7616 has over-temperature protection
to prevent permanent damage to the device.
When the die temperature rises above 150°C
the output drivers are shut off. The output
current will self recover when the temperature
drops below the trip point with the preset
hysteresis of 15°C. Thus a part that shut off at
150°C will not try to restart unless the die
temperature is below 135°C
? 2009 Exar Corporation
8/11
Rev. 2.0.4
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SP7616ER-L/TR | 功能描述:LED照明驱动器 RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| SP7616ER-STE-L | 功能描述:LED照明驱动器 High Accuracy 4Ch Low Side LED Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| SP7618 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7618_06 | 制造商:SIPEX 制造商全称:Sipex Corporation 功能描述:Evaluation Board Manual |
| SP7618EB | 功能描述:电源管理IC开发工具 Programmable LowSide Flash Driver RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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