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参数资料
| 型号： | MAX17061ETI+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 14/26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
The MAX17061 includes power-on reset (POR) and
undervoltage lockout (UVLO) features. POR resets the
fault latch and sets all the SMBus registers to their POR
values. POR occurs when V CC rises above 2.8V (typ).
The controller is disabled until V CC exceeds the UVLO
threshold of 4.25V (typ). Hysteresis on UVLO is approx-
imately 85mV.
The V CC and V DD pins should be bypassed to GND
with a minimum 1μF ceramic capacitor.
Startup
At startup, the MAX17061 checks the OV pin to see if
the Schottky diode is open. If the OV voltage is lower
than 84mV (typ), the boost converter does not start.
After the OV test is done, the MAX17061 performs a
diagnostic test of the LED array. The test is divided to
two phases; each phase takes approximately 1.024ms.
In the first test phase, all FB_ inputs are quickly dis-
charged down to 5.6V (typ) and then continuously dis-
charged by 800μA (typ) current sources. If a given FB_
voltage remains higher than 5.6V (typ), the string is
considered to be shorted. Otherwise, if a given FB_
voltage is higher than 3V (typ), the string is considered
to be unused. Unused strings should be tied to V CC . In
the second phase, each FB_ is precharged by an inter-
nal 400μA (typ) current source. If a given FB_ voltage
remains lower than 1V (typ), the FB_ is considered to
be a short to GND and the device is disabled. After the
LED string diagnostic phases are finished, the boost
converter starts. The total startup time is less than
10ms, including 4.2ms (typ) soft-start.
Shutdown
The MAX17061 can be placed into shutdown by clear-
ing bit 0 of the device control register (0x01). When a
critical failure is detected, the IC also enters shutdown
mode. In shutdown mode, all functions of the IC are
turned off including the 5V linear regulator. Only a
crude linear regulator remains on, providing a 4.35V
(typ) output voltage to V CC , with 1μA current-sourcing
capability. The fault/status register is not reset in shut-
down. When bit 0 of the device control register (0x01)
is set to 1, the MAX17061 exits shutdown mode and
starts. The fault/status register is reset at startup.
V IN
2.8V TO 5.5V
4.7 μ F
0.1 μ F
L1
2.2 μ H
D1
2 μ F
V OUT
UP TO 45V
EXTERNAL
5V SUPPLY
1 μ F
V DD
V CC
OSC
ISET
IN
LX1
LX2
PGND1
464k Ω
5.1k Ω
220pF
FSET
CCV
MAX17061
PGND2
OV
R1
2.21M Ω
PWM
0.022 μ F
PWMI
R2
61.9k Ω
1 μ F
PWMO
FB1
FB2
FB3
FB4
CLK
SCL
FB5
DATA
SDA
GND
EP
FB6
FB7
FB8
V CC
Figure 3. Low-Input-Voltage Application Circuit
14
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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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