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MC34845BEP

更新时间： 2024-11-10 19:45:23
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
20页 459K
描述
LED DISPLAY DRIVER, QCC24, 4 X 4 MM, 0.65 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, QFN-24

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MC34845BEP 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：QFN包装说明：HVQCCN, LCC24,.16SQ,20
针数：24Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.59接口集成电路类型：LED DISPLAY DRIVER
JESD-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）：NOT SPECIFIED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：NOT SPECIFIED
宽度：4 mmBase Number Matches：1

MC34845BEP 数据手册

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Document Number: MC34845  
Rev. 3.0, 2/2010  
Freescale Semiconductor  
Advance Information  
Low Cost 6 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 21V, the 34845 series is capable of driving up to 16 LEDs in series  
in 6 separate strings. The LED current tolerance in the 6 strings is within  
±2% maximum and is set using a resistor to GND.  
98ASA00087D  
24-PIN QFN-EP  
ORDERING INFORMATION  
Temperature  
Package  
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.  
Device  
Range (T )  
A
MC34845EP/R2  
MC34845AEP/R2  
MC34845BEP/R2  
MC34845CEP/R2  
MC34845DEP/R2  
-40° to 85°C  
24 QFN-EP  
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.  
Typical Applications  
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 60V (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.  
• PC Notebooks  
• Netbooks  
• Picture Frames  
• Portable DVD Players  
• Small Screen Televisions  
• Industrial Displays  
Features  
• Input voltage of 5.0 to 21V  
• Boost output voltage up to 60V  
• Medical Displays  
• 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 μQFN 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  
* This document contains certain information on a new product.  
Specifications and information herein are subject to change without notice.  
© Freescale Semiconductor, Inc., 2010. All rights reserved.  
1234567...20

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