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参数资料
| 型号： | MAX8790AETP+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/23页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 20-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 75 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 6 |
| 内部驱动器： | 无 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 4.5 V ~ 5.5 V，5.5 V ~ 26 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-WFQFN 裸露焊盘 |
| 供应商设备封装： | 20-TQFN-EP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
Six-String White LED Driver with Active
Current Balancing for LCD Panel Applications
Pin Description (continued)
PIN
11
12
13
14
15
16
17
18
19
20
EP
NAME
FB6
CS
EXT
OV
V CC
IN
CCV
ISET
FSET
CPLL
EP
FUNCTION
LED String 6 Cathode Connection. FB6 is the open-drain output of an internal regulator, which controls
current through FB6. FB6 can sink up to 27mA. If unused, connect FB6 to GND.
Step-Up Controller Current-Sense Input. Connect the CS input to a ground-referenced sense resistor to
measure the current in the external MOSFET switch.
External MOSFET Gate-Drive Output
Overvoltage Sense. Connect OV to the center tap of a resistive voltage-divider from V OUT to ground. The
detection threshold for voltage limiting at OV is 1.23V (typ).
5V Linear Regulator Output. V CC provides power to the MAX8790A and is also used to bias the gate driver
for the external MOSFET. Bypass V CC to GND with a ceramic capacitor of 1μF or greater. If V IN is less
than or equal to 5.5V, connect V CC to IN to the disable the internal LDO and use the external 5V supply to
V CC . When SHDN is low, the internal linear regulator is disabled.
Supply Input. V IN biases the internal 5V linear regulator that powers the device. Bypass IN to GND directly
at the pin with a 0.1μF or greater ceramic capacitor.
Step-Up Converter Compensation Pin. Connect a 0.1μF ceramic capacitor and 1.2k Ω resistor from CCV to
GND. When the MAX8790A shuts down, CCV is discharged to 0V through an internal 20k Ω resistor.
Full-Scale LED Current Adjustment Pin. The resistance from ISET to GND controls the full-scale current in
each LED string:
I LEDmax = 20mA x 100k Ω /R ISET
The acceptable resistance range is 74k Ω < R ISET < 133k Ω , which corresponds to full-scale LED current of
27mA > I LEDmax > 15mA. Connect ISET to V CC for a default full-scale LED current of 20mA.
PLL Free-Running Frequency Control Pin. The resistance from FSET to GND controls the PLL oscillator’s
free-running frequency, f PLL :
f PLL = 1 / (10 x R FSET x 800pF)
The capture range is 0.6 x f PLL to f PLL . The acceptable resistance range for FSET is 250k Ω < R FSET <
754k Ω , which corresponds to a frequency range of 500Hz > f PLL > 166Hz. The resulting capture
frequency range is 100Hz to 500Hz.
Phase-Locked Loop-Compensation Capacitor Pin. The capacitance at CPLL compensates the PLL loop
response. Connect a 0.1μF ceramic capacitor from CPLL to GND.
Exposed Backside Pad. Solder to the circuit board ground plane with sufficient copper connection to
ensure low thermal resistance. See the PCB Layout Guidelines section.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX8790AETP+ | 功能描述:LED照明驱动器 Six-String White LED 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 |
| MAX8790AETP+T | 功能描述:LED照明驱动器 Six-String White LED 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 |
| MAX8790AETP+X01 | 功能描述:LED照明驱动器 Six-String White LED 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 |
| MAX8790AEVKIT+ | 功能描述:LED 照明开发工具 MAX8790A Eval Kit RoHS:否 制造商:Fairchild Semiconductor 产品:Evaluation Kits 用于:FL7732 核心: 电源电压:120V 系列: 封装: |
| MAX8790ETP+ | 功能描述:LED照明驱动器 Six-String White LED 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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