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参数资料
| 型号： | MAX17061ETI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 28-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： | 8 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 1MHz |
| 电源电压： | 4.5 V ~ 26 V |
| 输出电压： | 5V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-WFQFN 裸露焊盘 |
| 供应商设备封装： | 28-TQFN-EP（4x4） |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 85°C |
8-String White LED Driver with
SMBus for LCD Panel Applications
D=
t ON
t DPWM
DPWM DIMMING MODE
DPWM
D = 50%
t ON
D = 30%
D = 12.5%
D = 6.25%
t DPWM
I LEDMAX
I LED
0A
Figure 4. LED Current Control by DPWM Signal in Dimming
I LEDMAX =
DPWM
MUX
1
PWM_SEL BACKLIGHT
IDENTIFICATION
FAULT/STATUS
REGISTER
REGISTER
Full-Scale LED Brightness
in DPWM Dimming Control
The full-scale LED current in the DPWM dimming is
determined by resistance from the ISET pin to ground:
20mA × 200k Ω
R ISET
The acceptable resistance range is 133k Ω < R ISET <
266k Ω , which corresponds to full-scale LED current of
30mA > I LEDMAX > 15mA. Connect ISET to V CC for a
default full-scale LED current of 25mA.
The current source output is pulse-width modulated
and synchronized with a DPWM signal to reduce jitter
and flicker noise in the display.
DPWM Frequency Setting
PWMO
PWMI
SDA
SCL
BUFFER
<=1
A
D
SMBus AND PWM INPUT BLOCK
PWM_MD
DEVICE BRIGHTNESS
CONTROL CONTROL
REGISTER REGISTER
0x03 0x02 0x01 0x00
SMBus
INTERFACE
MULTIPLIER MUX
DIGITAL SETTING
ON/OFF
f DPWM =
The MAX17061 uses an internal DPWM signal to perform
dimming control. The DPWM frequency is specified by
an external resistor connected from FSET pin to GND:
10 9
α × R [ Ω ] + γ
where: α = 10.638
γ = 58509
The adjustable range for the FSET resistor, R FSET , is
from 42k Ω to 464k Ω , corresponding to the DPWM fre-
quency of 200Hz to 2kHz.
Figure 5. MAX17061 PWM and SMBus Interface Circuit
Dimming Control Interfaces
The MAX17061’s dimming control circuit consists of
two interfaces: PWM and SMBus. The block diagram of
these two input interfaces is shown in Figure 5. The
dimming can be performed in three modes: PWM,
SMBus, or DPST. In PWM mode, the brightness is
adjusted by the PWM signal applied to the PWMI pin. In
SMBus mode, the brightness is adjusted by an I 2 C
command from uplink processor through the 2-wire
SMBus. In DPST mode, the brightness is adjusted by
the product of the PWM duty cycle and SMBus com-
mand value. This DPWM control provides a dimming
range with 8-bit resolution down to 2.7% and supports
Intel DPST to maximize battery life.
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17061ETI+ | 功能描述:LED照明驱动器 8-String White LED Driver w/SMBus 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 |
| MAX17061ETI+T | 功能描述:LED照明驱动器 8-String White LED Driver w/SMBus 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 |
| MAX17061EVCMAXQU+ | 功能描述:LED 照明开发工具 Evaluation Kit/Evaluation System for the MAX17061 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: |
| MAX17061EVKIT+ | 功能描述:LED 照明开发工具 MAX17061 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: |
| MAX17062ETB+ | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TFT-LCD STEP-UP DC-DC CONVERTER - Rail/Tube |
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