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TPS61183

更新时间： 2024-11-22 11:52:11
品牌 Logo 应用领域
德州仪器 - TI 驱动器电脑
页数 文件大小 规格书
25页 1206K
描述
WLED Driver for Notebooks with PWM Interface and Programmable PWM Dimming

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TPS61183 数据手册

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TPS61183  
www.ti.com  
SLVSAB4A –JUNE 2010–REVISED JULY 2010  
WLED Driver for Notebooks with PWM Interface and Programmable PWM Dimming  
Check for Samples: TPS61183  
1
FEATURES  
DESCRIPTION  
•
•
•
•
4.5 V to 24 V Input Voltage  
38 V Maximum Output Voltage  
Integrated 2.0 A 40 V MOSFET  
The TPS61183 IC provides a highly integrated WLED  
driver solution for notebook LCD backlight. This  
device has a built-in high efficiency boost regulator  
with integrated 2.0A /40V power MOSFET. The six  
current sink regulators provide high precision current  
regulation and matching. In total, the device can  
support up to 60 WLEDs. In addition, the boost output  
automatically adjusts its voltage to the WLED forward  
voltage to optimize efficiency.  
300 kHz to 1 MHz Programmable Switching  
Frequency  
•
•
Adaptive Boost Output to WLED Voltages  
Wide PWM Dimming Frequency Range  
–
–
100 Hz to 50 KHz for Direct PWM Mode  
100 Hz to 22 KHz for Frequency  
Programmable Mode  
The TPS61183 supports the programmable  
brightness dimming method. In this configuration, the  
dimming duty cycle of the WLED current is controlled  
by the input PWM signal but the dimming frequency  
is fixed and set by an external resistor. During direct  
PWM dimming, the WLED current completely  
synchronized with the input PWM signal's duty cycle  
and frequency.  
•
•
100:1 Dimming Ratio at 20 kHz  
10000:1 Dimming Ratio at 200 Hz (Direct PWM  
mode)  
•
•
•
•
•
•
Small External Components  
Integrated Loop Compensation  
Six Current Sinks of 30 mA Max  
1.5% (Typ) Current Matching  
PWM Brightness Interface Control  
Typical Application – Programmable PWM Mode  
L1  
D1  
4.5V~24V  
10 mH  
PWM Programmable Mode Brightness  
Dimming Method or Direct PWM Dimming  
Method  
C3  
4.7 mF  
R4  
R5  
C1  
2.2 mF  
Open  
VIN  
SW  
FAULT  
•
•
•
•
•
4 kV HBM ESD Protection  
VDDIO  
PGND  
C2  
1 mF  
R7  
1.2 KW  
Programmable Over Voltage Threshold  
Built-in WLED Open/Short Protection  
Thermal Shutdown  
OVP  
EN  
FSW  
R3  
499 KW  
TPS61183  
20 Lead 4mm ×4mm × 0.8mm TQFN Package  
R8  
10 KW  
19.8 mA  
PWMIN  
ISET  
IFB1  
IFB2  
IFB3  
IFB4  
IFB5  
IFB6  
VDD_GPIO  
APPLICATIONS  
•
R1  
62 KW  
Notebook LCD Display Backlight  
Open  
FPO  
RFPWM  
/MODE  
AGND  
R2  
9.09 KW  
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.  
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 © 2010, Texas Instruments Incorporated  
 
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