MC34844: 带电源的10通道LED背光驱动器 _ BDTIC 中国领先电子元器件代理商

MC34844: 带电源的10通道LED背光驱动器

MC34844系列是高效的LED驱动器，用于10英寸至27英寸的背光LCD显示屏。MC34844/A的工作电压为7V到28V，可在10个并联串中驱动超过150个LED显示屏。10个关联串中的电流误差为±2%, 并可通过I2C/SM总线接口进行设置。

MC34844/A还包括一个用于LED调光的脉宽调制(PWM)生成器。可对LED进行256级调光，可通过I2C/SM总线接口对LED进行编程。因此，最高可支持65,000:1 (256:1 PWM, 256:1电流DAC)的调光率。可使用外部PWM输入。多个器件的PWM频率可同步，以减少画面噪声，最高支持27kHz (34844的频率范围为100Hz到25kHz，34844A的频率范围为110Hz到27kHz)的频率，可减少噪声。

MC34844/A还支持温度和光补偿环路，以及环境背光控制。

特性

7V到28V的输入电压
高达60V的输出电压, 并带有动态净空控制
2.5A 集成升压
每个通道(34844)高达50 mA LED电流
每个通道(34844A)高达80 mA LED电流
90%效率(直流:直流)
±2%误差的10通道电流镜
I2C/SM总线接口
8位可编程电流DAC
用户可编程OVP
LED故障检测和OTP/OCP/UVLO锁定
34844的可编程或可同步PWM频率范围为100到25,000 Hz
34844A的可编程或可同步PWM频率范围为100到27,000 Hz
32引脚5x5x0.8mm TQFN无铅封装
本产品包含在恩智浦产品长期供货计划中，自推出后至少保证10年供货

NXP^® MC34844 LED Driver Block Diagram

NXP^® MC34844 Product Image

名称/描述	类型	Modified Date
MC34844, 10 Channel LED Backlight Driver with Integrated Power Supply - Data Sheet (REV 10.0) PDF (1.3 MB) MC34844 [English]	数据手册
MC34844FS, 带有集成电源的10通道LED背光驱动器 (REV 3) PDF (2.3 MB) MC34844FS [中文, English]	简介
AN1902, Assembly Guidelines for QFN (Quad Flat No-Lead) and DFN (Dual Flat No-Lead) Packages - Application Note (REV 7.0) PDF (3.6 MB) AN1902 [English]	应用说明

数据手册 (1)

名称/描述	Modified Date
MC34844, 10 Channel LED Backlight Driver with Integrated Power Supply - Data Sheet (REV 10.0) PDF (1.3 MB) MC34844 [English]	22 Aug 2014

应用说明 (1)

名称/描述	Modified Date
AN1902, Assembly Guidelines for QFN (Quad Flat No-Lead) and DFN (Dual Flat No-Lead) Packages - Application Note (REV 7.0) PDF (3.6 MB) AN1902 [English]	13 Oct 2014

用户指南 (1)

名称/描述	Modified Date
KITLEDBKLT16EVBE, LED Backlight 16 Channel Evaluation Board Kit - User Guide (REV 1.0) PDF (3.6 MB) KTLEDBKLT16UG [English]	15 Oct 2008

简介 (1)

名称/描述	Modified Date
MC34844FS, 带有集成电源的10通道LED背光驱动器 (REV 3) PDF (2.3 MB) MC34844FS [中文, English]	04 May 2010

产品变更通知 (1)

名称/描述	Modified Date
Copper Wire and Case Outline Qualification (QFN) (REV 0) HTM (47.3 kB) PCN16331 [English]	11 Jul 2014

订购信息

型号	状态	器件功能	预算报价（不含税）(CNY)	封装类型和焊端数	开关升压稳压器数量	输出电压	输出电流 (A)	供电电压 (Min-Max) (V)	接口和输入控制	工作环境温度 (Min-Max) (°C)	保护	诊断	其他特性-模拟	RoHS
MC34844AEPR2	Active	LED Drivers	1K @ CNY12.14	QFN 32	1	60	2.5	7 to 28	I2C, Parallel	-40 to 105	Output Current, Undervoltage Lockout, Overvoltage Protect, Output Short to Ground, Overtemperature	I2C, Parallel	PWM Capable	[object Object]
MC34844AEP	Active	LED Drivers	1K @ CNY12.14	QFN 32	1	60	2.5	7 to 28	I2C, Parallel	-40 to 105	Output Current, Undervoltage Lockout, Overvoltage Protect, Output Short to Ground, Overtemperature	I2C, Parallel	PWM Capable	[object Object]
MC34844EPR2	No Longer Manufactured	LED Drivers		QFN 32	1	60	2.5	7 to 28	I2C, Parallel	-40 to 105	Overvoltage Protect, Output Short to Ground, Output Current, Undervoltage Lockout, Overtemperature	I2C, Parallel	PWM Capable	[object Object]
MC34844EP	No Longer Manufactured	LED Drivers		QFN 32	1	60	2.5	7 to 28	I2C, Parallel	-40 to 105	Overvoltage Protect, Output Short to Ground, Output Current, Undervoltage Lockout, Overtemperature	I2C, Parallel	PWM Capable	[object Object]

封装环保信息

封装说明	Outline Version	包装	产品状态	部件编号	化学成分	MSL	PPT (°C)
QFN 32 551 P0.5	98ASA00473D	MPQ - 2450 BRICKPOQ - 2450 BOX	Active	MC34844AEP	MC34844AEP.pdf	3	260
QFN 32 551 P0.5	98ASA00473D	MPQ - 5000 REELPOQ - 5000 BOX	Active	MC34844AEPR2	MC34844AEPR2.pdf	3	260
QFN-EP 32 5.0SQ*1.0P0.5	98ASA10800D		Migration Complete. No Longer Manufactured. View PCN and Replacement Part Migration Complete. No Longer Manufactured. View PCN and Replacement Part	MC34844EP	MC34844EP.pdf	3	260
QFN-EP 32 5.0SQ*1.0P0.5	98ASA10800D		Migration Complete. No Longer Manufactured. View PCN and Replacement Part Migration Complete. No Longer Manufactured. View PCN and Replacement Part	MC34844EPR2	MC34844EPR2.pdf	3	260