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TPS61165-Q1 PDF预览

TPS61165-Q1

更新时间： 2024-11-14 12:47:11
品牌 Logo 应用领域
德州仪器 - TI 驱动器
页数 文件大小 规格书
24页 805K
描述
High Brightness White LED Driver in SOT-23 Package

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TPS61165-Q1 数据手册

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TPS61165-Q1  
www.ti.com  
SLVSB73 –DECEMBER 2011  
High Brightness White LED Driver in SOT-23 Package  
Check for Samples: TPS61165-Q1  
1
FEATURES  
DESCRIPTION  
With  
a 40-V rated integrated switch FET, the  
2
•
•
•
•
•
Qualified for Automotive Applications  
3-V to 18-V Input Voltage Range  
TPS61165-Q1 is a boost converter that drives LEDs  
in series. The boost converter runs at a 1.2-MHz fixed  
switching frequency with 1.2-A switch current limit,  
and allows for the use of a high brightness LED in  
general lighting.  
38-V Open LED Protection  
200-mV Reference Voltage With 2% Accuracy  
1.2-A Switch FET With 1.2-MHz Switching  
Frequency  
The default white LED current is set with the external  
sensor resistor Rset, and the feedback voltage is  
regulated to 200mV, as shown in the typical  
application. During the operation, the LED current can  
be controlled using the 1 wire digital interface (  
Easyscale™ protocol) through the CTRL pin.  
Alternatively, a pulse width modulation (PWM) signal  
can be applied to the CTRL pin through which the  
duty cycle determines the feedback reference  
voltage. In either digital or PWM mode, the  
TPS61165-Q1 does not burst the LED current;  
therefore, it does not generate audible noises on the  
output capacitor. For maximum protection, the device  
features integrated open LED protection that disables  
the TPS61165-Q1 to prevent the output from  
exceeding its absolute maximum voltage ratings  
during open LED conditions.  
•
Flexible 1 Wire Digital and PWM Brightness  
Control  
•
•
•
Built-in Soft Start  
Up to 90% Efficiency  
SOT-23 Package  
APPLICATIONS  
•
•
High Brightness LED Lighting  
White LED Backlighting for Media Form Factor  
Display  
The TPS61165-Q1 is available in a SOT-23 package.  
L1  
D1  
VIN 5V  
10 mH  
C1  
C2  
4.7 mF  
1 mF  
TPS61165-Q1  
VIN  
SW  
FB  
ON/OFF  
DIMMING  
CONTROL  
350 mA  
CTRL  
COMP  
Rset  
GND  
0.57 W  
220nF  
L1: TOKO #A915 _Y-100M  
C1: Murata GRM188R61A475 K  
C2: Murata GRM188R61E105K  
D1: ONsemi MBR0540T1  
LED : OSRAM LW-W5SM  
Figure 1. Typical Application  
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
Easyscale is a trademark of Texas Instruments.  
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 © 2011, Texas Instruments Incorporated  
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