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参数资料
| 型号： | SC4509SKTRT |
| 厂商： | Semtech |
| 文件页数： | 7/15页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WT/OLED BCKLT SOT236 |
| 标准包装： | 1 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | OLED，白色 LED |
| 频率： | 1MHz ~ 1.4MHz |
| 电源电压： | 2.7 V ~ 10 V |
| 输出电压： | 20V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-6 |
| 供应商设备封装： | SOT-23-6 |
| 包装： | 标准包装 |
| 工作温度： | -40°C ~ 85°C |
| 产品目录页面： | 1359 (CN2011-ZH PDF) |
| 其它名称： | SC4509SKDKR |
SC4509
POWER MANAGEMENT
Applications Information
Programming the LED Current
Please refer to the Typical Application Circuit on page 1.
The LED current is programmed by connecting a resistor
(R1) between the FB pin and GND. The LED current in
mA is given by the following equation:
I LED = 199/R1
where R1 value is in Ohms.
Setting the Output Voltage
The non-inverting input of the internal error ampli ? er is
tied to a 199mV voltage reference. A simple voltage divider
(R1 at the top and R2 at the bottom) sets the converter
output voltage. Please refer to the Application Circuit for
OLED Panels on the next page. The voltage feedback gain
h = 0.199/Vo is related to the divider resistors value as
h
R2
R1 R2
Once either R1 or R2 is chosen, the other can be calcu-
lated for the desired output voltage Vo. Since the number
of standard resistance values is limited, the calculated
resistance may not be available as a standard value resis-
tor. As a result, there will be a set error in the converter
output voltage. This non-random error is caused by the
feedback voltage divider ratio. It cannot be corrected by
the feedback loop.
? 2007 Semtech Corp.
7
www.semtech.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| SC4509WLTRT | 功能描述:IC LED DRVR WT/OLED BCKLT MLPD-8 RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 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-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
| SC450ITS | 制造商:Semtech Corporation 功能描述: |
| SC450ITS.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC450ITS.TRTCUT | 制造商:Semtech Corporation 功能描述: |
| SC450ITSTRT | 制造商:Semtech Corporation 功能描述:DC DC Cntrlr Single-OUT PWM DC to DC Controller 3V to 30V Input 38-Pin TSSOP T/R |
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