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參數(shù)資料
| 型號： | STCS1 |
| 廠商： | 意法半導(dǎo)體 |
| 元件分類： | LED驅(qū)動器 |
| 英文描述： | 1.5 A max constant current LED driver |
| 中文描述： | 1.5 A的最大恒定電流LED驅(qū)動器 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大小： | 406K |
| 代理商： | STCS1 |
Application information
STCS1
10/17
8
Application information
8.1
Reverse polarity protection
STCS1 must be protected from reverse connection of the supply voltage. Since the current
sunk from V
CC
pin is in the range of 450 μA a small diode connected to V
CC
is able to
protect the chip. Care must be taken for the whole application circuit, especially for the
LEDs, in fact, in case a negative voltage is applied between V
IN
and GND, a negative
voltage will be applied to the LED string that must have a total breakdown voltage higher
than the negative applied voltage in order to avoid any damage.
8.2
Thermal considerations
The STCS1 is able to control a LED current up to 1.5 A and able to sustain a voltage on the
drain pin up to 40 V. Those operating conditions are however limited by thermal constraints,
the thermal resistances shown in the THERMAL DATA section are the typical ones, in
particular R
thJA
depends on the copper area and the number of layers of the printed circuit
board under the pad. DFN8 and PowerSO-8 have an exposed die attach pad which
enhances the thermal conductivity enabling high power application.
The power dissipation in the device can be calculated as follow:
P
D
= (V
DRAIN
- V
FB
) x I
LED
+ (V
CC
x I
CC
)
basing on this and on the thermal resistance and ambient temperature, the junction
temperature can be calculated as:
T
J
= R
thJA
x P
D
+ T
A
A typical application could be:
– Input Voltage: 12 V;
– 3 white LEDs with an typical V
F
= 3.6 V;
– LEDs current: 500mA;
Figure 11.
Reverse polarity condition
PWM
DISC
GND
V
CC
DRAIN
FB
V
IN
+
or similar
BAT46
EN
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| STCS1_08 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.5 A max constant current LED driver |
| STCS1A | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:1.5 A max constant current LED driver |
| STCS1APHR | 功能描述:LED照明驅(qū)動器 1.5 A Max Const LED Driver 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 |
| STCS1APUR | 功能描述:LED照明驅(qū)動器 1.5 A Max Const LED Driver 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 |
| STCS1DEMO1 | 功能描述:電源管理IC開發(fā)工具 VOLT REG DEMO BRD 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 |
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