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SC5010

更新时间： 2024-11-09 07:20:31
品牌 Logo 应用领域
商升特 - SEMTECH 驱动器
页数 文件大小 规格书
36页 895K
描述
High Effi ciency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming

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SC5010 数据手册

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SC5010  
High Efficiency 8-Channel LED Driver with  
I2C Interface and Phase-Shifted PWM Dimming  
POWER MANAGEMENT  
Features  
Description  
VIN Range — 4.5V to 27V, VOUT Range — Up to 50V  
Step-up (Boost) Controller  
The SC5010 is an 8-channel high-precision, high-efficiency  
step-up (Boost) LED driver for backlight applications. It fea-  
tures wide input voltage range (4.5V to 27V) , flexible output  
configuration, wide analog and PWM dimming range,  
phase shifting and fading. It also features video signal syn-  
chronization (VSYNC), I2C interface, and numerous protec-  
tion features. An optional disconnect p-MOSFET provides  
true load disconnection and inrush current limiting.  
Excellent Transient Response  
Programmable Switching Frequency  
Linear Current Sinks  
8 Strings, up to 30mA/String  
Current Matching 1ꢀ  
Current Accuracy 1.5ꢀ  
PWM Dimming  
String-by-String Phase Shifting  
Input Dimming Frequency 100Hz-30kHz  
User Selectable 9 or 10 Bits Dimming Resolution  
Optional Synchronization to VSYNC/HSYNC Signal  
The boost controller, with programmable switching fre-  
quency from 200kHz to 2.2MHz, maximizes efficiency by  
dynamically minimizing the output voltage while maintain-  
ing LED string current accuracy. It provides excellent line  
and load response with no external compensation compo-  
nents. Each linear current sink is matched within 1ꢀ for  
superb lighting uniformity, and the accuracy of each string  
current is 1.5ꢀ. An external resistor adjusts the current  
from 10-30mA per string. It also features PWM dimming  
resolution of 9 or 10 bits (user selectable) over dimming  
frequency from 100Hz to 20kHz, synchronized to the SYNC  
signal or the boost oscillator. String-by-string phase shifting  
reduces the demand on the input/output capacitance,  
decreases EMI, and improves dimming linearity.  
5-bit Analog Dimming  
Optional External p-MOSFET Disconnect Switch  
True Load Disconnect and Inrush Current Limiting  
I2C Interface  
Fault Status — Open/Short LED, UVLO, OTP  
Device Control — SYNC Freq, PLL Setting  
Protection Features  
Open/Shorted LED(s) and adjustable OVP  
Over-Temperature and UVLO Shutdown Protection  
4 X 4(mm) 28-pin QFN Package  
Applications  
SC5010 is available in a low-profile, thermally enhanced,  
4 X 4 X 0.6(mm) QFN 28-pin package.  
Notebook PCs, UMPC, LCD Monitors, and Tablet PCs  
Typical Application Circuit  
D1  
VOUT up to 50V  
L1  
2.2μH  
Q 2  
(O ptional)  
C2  
4.7μF  
DRVP  
VIN  
Q 1  
R4  
DRVN  
CS  
VIN=4.5 to 27V  
C5  
R 1  
C1  
SC5010  
R 2  
UVLO  
VCC  
R8  
VCC = 4.5 to 5.5V  
O VP  
R9  
R3  
FLT  
EN  
FLT  
IO1  
IO2  
EN  
SDA  
SCL  
For I2C  
IO 3  
IO 4  
IO5  
IO 6  
IO7  
SYNC  
PW M I  
SYNC  
PW M I  
Up to  
30m A/CH  
C3  
BG  
R6  
R5  
SCP  
R10  
R11  
R 7  
FSET  
IO8  
AG ND  
PG ND  
ISET  
C4  
CPLL  
Revision 1.0  
1
© 2011 Semtech Corporation  
1234567...36

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