- 您现在的位置：买卖IC网 > Sheet目录336 > LDS8720 (IXYS)IC LED DRIVER PWM 25MA 8TDFN
LDS8720
184 WLED Matrix Driver with Boost Converter
FEATURES
? High efficiency boost converter with the input
voltage range from 2.7 to 5.5 V
? No external Schottky Required (Internal
The LDS8720 has thermal shutdown set at 150 C.
synchronous rectifier)
? 250 mV current sense voltage
? Drives up to 10 LEDs per string
? More than 180 LEDs in matrix
? 0.7 MHz Switching Frequency
? Efficiency greater than 83%
? PWM LED Dimming Control Mode
? Over-voltage, under-voltage, over-current,
and over-temperature protection
? Low Shutdown Current (<1μA)
? Available in 2 x 3 x 0.8 mm 8-pin TDFN
package
APPLICATION
The use of integrated synchronous rectifier makes
the efficiency dependent on only inductor DC
resistance. Under-voltage protection disables the part
when V IN voltage reaches 2.0 V.
PV IN voltage may be set equal V IN voltage or higher
up to 15 V to increase power capability of the driver.
Maximum number of LEDs in matrix depends on this
voltage as shown in the table below.
0
Above this value , the boost converter stops
temperature drops below 130 C.
?
?
?
?
?
?
Color Display Backlight
Portable Navigation and GPS Receivers
Smart phones
Digital Photo Frames
Portable DVD Players
Architectural Lighting
switching. The part resumes normal operations when
0
The over-current protection provides cycle-by-cycle
current limit.
The internal output over-voltage protection prevents
damage in the case of a faulty LED disconnect.
DESCRIPTION
The LDS8720 is a fixed frequency current mode
boost converter with internal synchronous rectifier
and cycle-by-cycle switch current limit specifically
designed to drive matrix of LEDs in respect with the
Table 1. Operation at 0.7 MHz allows use of small
value low profile inductor (10 – 33 μH) and 1 μF 50 V
The PWM control ensures brightness adjustment with
a frequency from 100 Hz up to 30 KHz.
The EN/PWM logic input functions as a chip enable
and LED current PWM contol pin.
The device is available in 8-pin TDFN 2 x 3 mm
package with a max height of 0.8 mm.
Table 1 Matrix configuration for LDS8720
ceramic capacitor.
TYPICAL APPLICATION CIRCUIT
PV IN MIN, V
2.7
3.0
4.0
5.0
7.5
10
12.5
15
15
Number of
LED per string
10
10
10
10
10
10
10
10
8
String
Current
max, mA,
30
30
30
30
30
30
30
30
30
Number
of strings
1 –3
1 –4
1 –5
1 –6
1 –9
1 – 12
1 – 15
1 – 18
1 – 23
? 2011 IXYS Corp.
Characteristics subject to change without notice
1
Doc. No. 8720DS, Rev. N1.1
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
LDS8724
IC LED DRIVER PWM 25MA 8TDFN
LDS8726
IC LED DRIVER PWM 25MA 8TDFN
LDS8845-002-T2
IC LED DVR WHT/CLR BCKLGT 16WQFN
LDS8846-002-T2
IC LED DVR WHT/CLR BCKLGT 16WQFN
LDS8865002-T2-250
IC LED DVR WHT/CLR BCKLGT 16WQFN
LDS8866002-T2-300
IC LED DVR WHT/CLR BCKLGT 16WQFN
LDS8868-002-T2
IC LED DVR WHT/CLR BCKLGT 16WQFN
LDS8869-002-T2
IC LED DVR WHT/CLR BCKLGT 16WQFN
相关代理商/技术参数
LDS8724
功能描述:LED照明驱动器 40 WLED driver Boost Converter
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
LDS8724008T2-200
制造商:IXYS 制造商全称:IXYS Corporation 功能描述:40 WLED Driver with Boost Converter
LDS8726
功能描述:LED照明驱动器 42 WLED driver Boost Converter
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
LDS8845-002-T2
功能描述:LED照明驱动器 4-Chan UL DropOut WLED 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
LDS8846-002-T2
功能描述:LED照明驱动器 4-Chan UL DropOut WLED 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
LDS8865-002-T2
功能描述:LED照明驱动器 6-Chan Chge Pump Bsd 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
LDS8865002-T2-250
功能描述:IC LED DVR WHT/CLR BCKLGT 16WQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:PowerLite™ 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C
LDS8866002-T2-300
功能描述:IC LED DVR WHT/CLR BCKLGT 16WQFN RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:PowerLite™ 标准包装:60 系列:- 恒定电流:- 恒定电压:- 拓扑:线性（LDO），PWM，升压（升压） 输出数:8 内部驱动器:是 类型 - 主要:背光 类型 - 次要:RGB，白色 LED 频率:500kHz ~ 1.5MHz 电源电压:4.75 V ~ 26 V 输出电压:45V 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* 工作温度:-40°C ~ 85°C
