- 您现在的位置：买卖IC网 > Sheet目录988 > LM2795EVAL (National Semiconductor)BOARD EVALUATION LM2795
SNVS168L – JANUARY 2002 – REVISED MAY 2013
LM2794 /LM2795 Current Regulated Switched Capacitor LED Supply with Analog and
PWM Brightness Control
Check for Samples: LM2794 , LM2795
1
FEATURES
APPLICATIONS
2
?
Regulated Current Sources with ±0.5%
?
White LED Display Backlights
Matching between any Two Outputs
?
White LED Keypad Backlights
?
High Efficiency 3/2 Boost Function
?
1-Cell Li-Ion Battery-Operated Equipment
?
?
?
?
?
?
?
?
?
?
Drives One, Two, Three or four White LEDs
2.7V to 5.5V Input Voltage
Up to 80mA Output Current
Analog Brightness Control
Active-Low or High Shutdown Input ('94/95)
Very Small Solution Size and no Inductor
2.3μA (typ.) Shutdown Current
325kHz Switching Frequency (min.)
Constant Frequency Generates Predictable
Noise Spectrum
Thin DSBGA Package: 2.08mm X 2.403mm X
0.600mm High
Including PDAs, Hand-Held PCs, Cellular
Phones
DESCRIPTION
The LM2794/95 is a fractional CMOS charge-pump
that provides four regulated current sources. It
accepts an input voltage range from 2.7V to 5.5V and
maintains a constant current determined by an
external sense resistor.
The LM2794/5 delivers up to 80mA of load current to
accommodate four White LEDs. The switching
frequency is 325kHz. (min.) to keep the conducted
noise spectrum away from sensitive frequencies
within portable RF devices.
Basic Application Circuit
V IN
P OUT
C IN
1 P F
C1+
C HOLD
1 P F
C1
1 P F
D1
C1-
C2+
D2
LED1
C2
1 P F
LM2794/95
D3
LED2
C2-
SD
D4
LED3
BRGT
I SET
LED4
GND
R SET
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright ? 2002–2013, Texas Instruments Incorporated
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
LM3423MHBSTEVAL/NOPB
BOARD EVAL BOOST FOR LM3423
LM89EVAL
BOARD EVALUATION LM89
LM95241EB
BOARD EVALUATION LM95241
LOB3R005FLFLT
RES METAL .005 OHM 3W 1% AXIAL
LP05-1A66-80V
RELAY REED SPST 500MA 5V
LP5521TMEV
EVAL BOARD FOR LP5521
LPS0300H1000JB
RESISTOR HEAT SINK 100 OHM 300W
LPS0600H4R70JB
RESISTOR HEAT SINK 4.7 OHM 600W
相关代理商/技术参数
LM2795TL
功能描述:IC LED DRVR WHT BCKLT 14MICROSMD RoHS:否 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:1 系列:- 恒定电流:- 恒定电压:- 拓扑:PWM，切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:642kHz 电源电压:2.7 V ~ 5.5 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘 供应商设备封装:10-VSON 包装:剪切带 (CT) 工作温度:-30°C ~ 85°C 产品目录页面:1371 (CN2011-ZH PDF) 其它名称:BD1603NUV-E2CT
LM2795TLX
制造商:NSC 制造商全称:National Semiconductor 功能描述:Current Regulated Switched Capacitor LED Supply with Analog and PWM Brightness Control
LM2795TLX/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
LM2796
制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual-Display White LED Driver with 3/2x Switched Capacitor Boost
LM27961
制造商:NSC 制造商全称:National Semiconductor 功能描述:Dual-Display White LED Driver with 3/2x Switched Capacitor Boost
LM27961AW WAF
制造商:Texas Instruments 功能描述:
LM27961TL
制造商:Texas Instruments 功能描述:IC WLED DRIVER POWERWISE
LM27961TL/NOPB
功能描述:IC LED DRVR WHT BCKLT 18USMD RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 标准包装:1 系列:- 恒定电流:- 恒定电压:- 拓扑:PWM，切换式电容器（充电泵） 输出数:1 内部驱动器:是 类型 - 主要:背光 类型 - 次要:白色 LED 频率:642kHz 电源电压:2.7 V ~ 5.5 V 输出电压:5V 安装类型:表面贴装 封装/外壳:10-VFDFN 裸露焊盘 供应商设备封装:10-VSON 包装:剪切带 (CT) 工作温度:-30°C ~ 85°C 产品目录页面:1371 (CN2011-ZH PDF) 其它名称:BD1603NUV-E2CT