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MC34845DEPR2 PDF预览

MC34845DEPR2

更新时间： 2024-09-19 20:00:31
品牌 Logo 应用领域
恩智浦 - NXP 驱动接口集成电路
页数 文件大小 规格书
24页 544K
描述
LED Backlight Driver, 6 Channel with Integrated Power Supply,QFN 24, Reel

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中文翻译

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MC34845DEPR2 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Transferred零件包装代码：QFN
包装说明：4 X 4 MM, 0.65 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, QFN-24针数：24
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.59
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：S-XQCC-N24
长度：4 mm湿度敏感等级：3
复用显示功能：NO功能数量：1
区段数：96端子数量：24
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：UNSPECIFIED封装代码：HVQCCN
封装等效代码：LCC24,.16SQ,20封装形状：SQUARE
封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE峰值回流温度（摄氏度）：260
电源：12 V认证状态：Not Qualified
座面最大高度：0.65 mm子类别：Display Drivers
最大供电电压：21 V最小供电电压：5 V
标称供电电压：10 V表面贴装：YES
温度等级：INDUSTRIAL端子形式：NO LEAD
端子节距：0.5 mm端子位置：QUAD
处于峰值回流温度下的最长时间：40宽度：4 mm
Base Number Matches：1

MC34845DEPR2 数据手册

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Document Number: MC34845  
Rev. 7.0, 6/2014  
Freescale Semiconductor  
Technical Data  
Low Cost Six Channel LED  
Backlight Driver with Integrated  
Power Supply  
34845  
34845A/B/C/D  
LED DRIVER  
The 34845 series represents high efficiency LED drivers for use in  
backlighting LCD displays from 10” to 17”. Operating from supplies of  
5.0 to 21 V, the 34845 series is capable of driving up to 16 LEDs in  
series in six separate strings. The LED current tolerance in the six  
strings is within ±2% maximum and is set using a resistor to GND.  
98ASA00087D  
24-PIN QFN-EP  
Applications  
• PC notebooks  
PWM dimming is performed by applying a PWM input signal to the PWM  
pin which modulates the LED channels directly. An Enable Pin (EN)  
provides for low power standby. Alternatively, a single wire scheme  
selects power down when PWM is connected to the Wake Pin and held  
low.  
• Netbooks  
• GPS screens  
• Portable DVD players  
• Picture frames  
• Smaller screen televisions  
• Industrial/instrumentation displays  
• Health care device displays  
The integrated boost converter uses dynamic headroom control to  
automatically set the output voltage. There are three device versions for  
boost frequency; 34845/C is 600 kHz, 34845A is 1.2 MHz and the  
34845B/D is 300 kHz. External compensation allows the use of different  
inductor/ capacitor combinations.  
The 34845 includes fault protection modes for LED short and open, over  
temperature, over current and over voltage errors. It features an  
internally fixed OVP value of 60 V (typical) which protects the device in  
the event of a failure in the externally programmed OVP. The OVP level  
can be set by using an external resistor divider. This device is powered  
using SMARTMOS technology.  
Features  
• Input voltage of 5.0 to 21 V  
• Boost output voltage up to 60 V  
• 2.0 A integrated boost FET  
• Fixed boost frequency - 300 kHz, 600 kHz or 1.2 MHz  
• OTP, OCP, UVLO fault detection  
• LED short/open protection  
• Programmable LED current between 3.0 mA and 30 mA  
• 24-Ld 4x4x0.65mm QFN Package  
34845  
12V  
VIN  
SWA  
SWB  
VDC1  
VDC2  
VOUT  
PGNDB  
PGNDA  
COMP  
EN  
OVP  
5V  
~
~
~
~
~
~
~
~
~
~
~
~
FAIL  
PWM  
CONTROL  
UNIT  
CH1  
CH2  
CH3  
CH4  
CH5  
CH6  
WAKE  
ISET  
GND EP GND  
Figure 1. 34845 Simplified Application Diagram  
© Freescale Semiconductor, Inc., 2011 - 2014. All rights reserved.  
1234567...24

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