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参数资料
| 型号： | MAX8901BETA+T |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | IC LED DRIVR WHITE BCKLGT 8-TDFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 背光 |
| 类型 - 次要： | 白色 LED |
| 频率： | 700kHz ~ 800kHz |
| 电源电压： | 2.6 V ~ 5.5 V |
| 输出电压： | 24V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-WFDFN 裸露焊盘 |
| 供应商设备封装： | 8-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 85°C |
Highest Efficiency Supply for 2 to 6
Series WLEDs in a 2mm x 2mm TDFN Package
MAX8901B
THERMAL
REF
GND
SHUTDOWN
INTERNAL
750kHz OSC
SHUTDOWN
TIMER
BOOST
CONTROL
LOGIC
IC
POWER
IN
LX
PGND
OVP
CS
Gm
0.5V
PULSE
DIMMING
COMP
ON
EP
Figure 3. MAX8901B Block Diagram
The MAX8901_ feature:
? Internal soft-start that gradually illuminates the
WLEDs to eliminate inrush current during startup.
? Input overvoltage protection (6.5V max) that
prevents IC switching when exceeded.
Input Overvoltage Lockout
When V IN exceeds 6.2V (min), input overvoltage
lockout (OVLO) is engaged to protect the MAX8901_
from high-input voltage conditions. Once input OVLO
occurs, the MAX8901_ stop switching and no WLED
current flows, provided the forward voltage of the
?
?
WLED overvoltage protection (25V typ) that latches
off the IC.
Shutdown mode that reduces current to 0.01μA (typ).
WLED string is greater than V IN . When V IN falls below
6V (min), the input OVLO condition is cleared, and the
IC is enabled and enters soft-start.
No WLED current is present in shutdown or during an
overvoltage condition if the WLED forward voltage is
greater than the input supply voltage. Figures 2 and 3
show the block diagrams for the MAX8901A and
MAX8901B, respectively.
WLED Overvoltage Protection
WLED overvoltage protection (OVP) occurs when the
WLED output voltage rises above the WLED OVP
threshold. The WLED OVP protection circuitry latches
off the IC and the IC enters shutdown when the WLED
OVP threshold is exceeded. After OVP is engaged,
cycle V IN or toggle ON to reenable the IC and enter
soft-start.
_______________________________________________________________________________________
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相关代理商/技术参数 |
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|---|---|
| MAX8901EVKIT+ | 功能描述:LED 照明开发工具 Evaluation Kit for the MAX8901A and MAX8901B 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: |
| MAX8902AATA+ | 制造商:Maxim Integrated Products 功能描述:LDO REGULATORS 制造商:Maxim Integrated Products 功能描述:LOW-NOISE 500MA LDO REGULATORS IN A 2MM X 2MM TDFN PACKAGE - Bulk |
| MAX8902AATA+T | 功能描述:低压差稳压器 - LDO 500mA LDO Regulator RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20 |
| MAX8902AATAT | 制造商:MAXIM/DALLAS 功能描述: |
| MAX8902BATA/V+ | 制造商:Maxim Integrated Products 功能描述:LOW-NOISE 500MA LDO REGULATORS IN A 2MM X 2MM TDFN PACKAGE - Rail/Tube |
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