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参数资料
| 型号： | MC34844AEPR2 |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 15/62页 |
| 文件大小： | 0K |
| 描述： | IC LED DVR BACKLIGHT 10CH 32QFN |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 10 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 频率： | 可调节/可选择 |
| 电源电压： | 7 V ~ 28 V |
| 输出电压： | 8 V ~ 60 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN 裸露焊盘（5x5） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 105°C |
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MC34844
FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
A0/SEN
Address select, device select pin, or Hardware Over-
voltage Protection (OVP) Control.
CURRENT SET (ISET)
Each LED string can drive up to 50 mA. The maximum
current can be set by using a resistor from this pin to GND.
POSITIVE CURRENT SCALING (PIN)
Positive current scaling factor for the external analog
current control. Applying 0 V to this pin, scales the current to
near 0%, and in the same way, applying 2.048 V (Vset), the
scale factor is 100%. By applying a voltage higher than 2.2 V,
the scaling factor is disabled, and the internal pull-ups are
activated.
If PIN pin and NIN pin are used at the same time then by
applying 0 V to the PIN pin and 2.048 V to NIN pin, scales the
current to near 0%, and in the same way, applying 2.048 V to
the PIN pin and 0 V to NIN pin, scales the current to 100%.
By applying a voltage higher than 2.2 V, the scaling factor is
disabled and the internal pull-ups are activated in both pins.
NEGATIVE CURRENT SCALING (NIN)
Negative current scaling factor for the external analog
current control. Setting 0 V to this pin scales the current to
100%, in the same way, setting 2.048 V (Vset) the scale
factor is near 0%. By applying a voltage higher than 2.2 V, the
scaling factor is disabled and the internal pull-ups are
activated.
If PIN pin and NIN pin are used at the same time then by
applying 0 V to the PIN pin and 2.048 V to NIN pin, scales the
current near 0%, and in the same way, applying 2.048 V to
the PIN pin and 0 V to NIN pin, scales the current to 100%.
By applying a voltage higher than 2.2 V, the scaling factor is
disabled and the internal pull-ups are activated in both pins.
GROUND (GND)
Ground Reference for all internal circuits other than the
Boost FET.
The Exposed Pad (EP) should be used for thermal heat
dissipation.
I0-I9
Current LED driver, each line has the capability of driving
up to 50 mA.
FAULT DETECTION PIN (FAIL)
When a fault situation is detected, this pin goes into high
impedance.
BOOST SLOPE COMPENSATION SETTING
RESISTOR (SLOPE)
Use an external resistor of about 68 k Ω to configure the
Boost compensation slope.
POWER GROUND PINS (PGNDA, PGNDB)
Ground pin for the internal Boost FET.
OUTPUT VOLTAGE SENSE PIN (VOUT)
Input pin to monitor the output voltage. It also supplies the
input voltage for the internal regulator 2 (VDC2).
SWITCHING NODE PINS (SWA, SWB)
Switching node of boost converter.
34844
Analog Integrated Circuit Device Data
15
Freescale Semiconductor
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC34844EP | 功能描述:LED照明驱动器 BACKLIGHT LED DRIVER W/10 CHANNELS RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MC34844EPR2 | 功能描述:LED照明驱动器 BACKLIGHT LED DRIVER W/10 CHANNELS RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MC34845 | 制造商:SPC Multicomp 功能描述:RECEPTACLE FREE 16WAY 制造商:SPC Multicomp 功能描述:RECEPTACLE, FREE, 16WAY |
| MC34845AEP | 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
| MC34845AEPR2 | 功能描述:LED照明驱动器 6-Ch LED Backlt Driver RoHS:否 制造商:STMicroelectronics 输入电压:11.5 V to 23 V 工作频率: 最大电源电流:1.7 mA 输出电流: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:SO-16N |
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