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| 型号： | LM2794TLX |
| 厂商： | National Semiconductor |
| 文件页数： | 2/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHT BCKLT 14USMD |
| RoHS指令信息： | LM2794TLX Material |
| 标准包装： | 3,000 |
| 恒定电流： | 是 |
| 拓扑： | PWM，切换式电容器（充电泵） |
| 输出数： | 4 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 325kHz ~ 675kHz |
| 电源电压： | 2.7 V ~ 5.5 V |
| 输出电压： | 3.8V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFBGA |
| 供应商设备封装： | 14-TuSMD |
| 包装： | 带卷 (TR) |
| 工作温度： | -30°C ~ 85°C |
| 其它名称： | *LM2794TLX |
SNVS168L – JANUARY 2002 – REVISED MAY 2013
DESCRIPTION (CONTINUED)
Brightness can be controlled by both linear and PWM techniques. A voltage between 0V and 3.0V may be
applied to the BRGT pin to linearly vary the LED current. Alternatively, a PWM signal can be applied to the SD
pin to vary the perceived brightness of the LED. The SD pin reduces the operating current to 2.3μA (typ.) The
LM2794 is shut down when the SD pin is low, and the LM2795 is shut down when the SD pin is high.
The LM2794/95 is available in a DSBGA CSP package.
Connection Diagram
C7
E7
E5
E3
D6
D2
B6
B2
A7
A5
A3
E1
C1
Figure 1. DSBGA Package
Bottom View
PIN DESCRIPTION
A1
Pin
(1)
Name
Function
A1
B2
C1
D2
E1
E3,E5,E7,D6
C7
B6
A7
A5
A3
C1+
C1 ?
V IN
GND
C2 ?
D1 ? 4
I SET
BRGT
SD
C2+
P OUT
Positive terminal of C1
Negative terminal of C1
Power supply voltage input
Power supply ground input
Negative terminal of C2
Current source outputs. Connect directly to LED
Current Sense Input. Connect 1% resistor to ground to set constant current through LED
Variable voltage input controls output current
The LM2794 has an active-low shutdown pin (LOW = shutdown, HIGH = operating). The LM2795
has an active-high shutdown pin (HIGH = shutdown, LOW = operating) that has a pull-up to V IN .
Positive terminal of C2
Charge pump output
(1)
Note that the pin numbering scheme for the DSBGA package was revised in April, 2002 to conform to JEDEC standard. Only the pin
numbers were revised. No changes to the physical location of the inputs/outputs were made. For reference purpose, the obsolete
numbering had C1+ as pin 1, C1- as pin 2, VIN as pin 3, GND as pin 4, C2- as pin 5, D1-D4 as pin 6,7,8 & 9, Iset as pin 10, BRGT as
pin 11, SD as pin 12, C2+ as pin 13, Pout as pin 14
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
2
Product Folder Links: LM2794 LM2795
Copyright ? 2002–2013, Texas Instruments Incorporated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2794TLX/NOPB | 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 |
| LM2795 | 制造商:未知厂家 制造商全称:未知厂家 功能描述: |
| LM27951 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:White LED Adaptive 1.5X/1X Switched Capacitor Current Driver |
| LM27951SD | 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 |
| LM27951SD/NOPB | 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 |
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