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参数资料
| 型号： | MAX17105ETG+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 16/26页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR WHITE BCKLGT 24-TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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： | 500kHz ~ 2MHz |
| 电源电压： | 6 V ~ 28 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-WFQFN 裸露焊盘 |
| 供应商设备封装： | 24-TQFN-EP（4x4） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
8-String WLED Driver with Integrated Step-Up
Regulator and SMBus/PWM Dimming Capability
Low
SGND
Table 3. Operating Mode
EN DFSET
Direct PWM
(Standby)
SCL, SDA
X
0.8mA (typ, 0.4mA min) current source during 1ms (typ).
If some FB_ voltage is lower than 1.2V (max), the string is
considered to be unused. Therefore, when a string is not
in use, it should be connected to SGND. All other strings
with FB_ higher than 1.2V (max) are detected as in use.
Direct PWM
(Startup)
SMBus
(Standby)
SMBus
(Startup)
High
X
X
SGND
R DFSET
R DFSET
X
CLOCK
ENABLE
Command
After the LED string diagnostic phases are finished, the
step-up regulator starts. The total startup time is less
than 10ms.Figure 3 shows the sequence.
Standby and FAULT Shutdown
The MAX17105 can be placed into standby by EN =
low in direct-PWM mode or clearing bit 0 of the device
X = Don’t Care
At startup, there are three phases. The first phase is
p-channel MOSFET soft-start time, the second is check
LED time (1ms), and the last phase is boost soft-start
time (4ms). In the first phase, FAULT sink current is
increased from 0 F A to 50μA to avoid high inrush current
caused by the p-channel MOSFET turn-on. In check LED
time, the MAX17105 performs a diagnostic test of the
LED array. In the test phase, all FB_ are pulled up by
control register (0x01) in SMBus mode. When a critical
failure is detected, the IC enters fault shutdown mode.
In standby or fault shutdown mode, all functions of the
IC are turned off, including the 5V linear regulator. Only
a crude linear regulator remains on providing a 4.5V
(typ) output voltage to V CC , with 1 F A current sourcing
capability. The Fault/Status register is not reset in fault
shutdown. When bit 0 of the device control register
(0x01) is set to 1 in SMBus mode or cycling the EN pin,
the MAX17105 exits fault shutdown mode and starts. The
Fault/Status register is reset at startup.
V IN
0V
VOUT
0V
V FAULT
0V
I FAULT
0uA
V VCC
0V
Figure 3. MAX17105 Startup Timing Sequence
PFET
SOFT-START
CHECK LED
STEP-UP REGULATOR
SOFT-START
16
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX17105EVKIT+ | 功能描述:电源管理IC开发工具 MAX17105 Eval Kit RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| MAX17106ETN+ | 功能描述:PMIC 解决方案 PMIC for LCD RoHS:否 制造商:Texas Instruments 安装风格:SMD/SMT 封装 / 箱体:QFN-24 封装:Reel |
| MAX17106ETN+T | 功能描述:其他电源管理 Integrated Circuits (ICs) Power Management - Specialized - IC REG STEP UP/HV STEPUP 56-TQFN RoHS:否 制造商:Texas Instruments 输出电压范围: 输出电流:4 mA 输入电压范围:3 V to 3.6 V 输入电流: 功率耗散: 工作温度范围:- 40 C to + 110 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-48 封装:Reel |
| MAX17106EVKIT+ | 制造商:Maxim Integrated Products 功能描述:STEP-UP REGULATOR HIGH-VOLTAGE STEP-UP WITH TEMPERATURE COMP - Boxed Product (Development Kits) |
| MAX17107ETI+ | 制造商:Maxim Integrated Products 功能描述:- Rail/Tube |
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