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MAX8901BETA+TCH8

更新时间： 2024-11-23 14:53:07
品牌 Logo 应用领域
美信 - MAXIM PC驱动接口集成电路
页数 文件大小 规格书
14页 314K
描述
LED Driver

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中文翻译

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MAX8901BETA+TCH8 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Obsolete包装说明：,
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.74
Samacsys Confidence：Samacsys Status：Released
Samacsys PartID：600346Samacsys Pin Count：9
Samacsys Part Category：Integrated CircuitSamacsys Package Category：Other
Samacsys Footprint Name：DFN200X200X80-9NSamacsys Released Date：2017-01-11 21:24:41
Is Samacsys：N接口集成电路类型：LED DISPLAY DRIVER
湿度敏感等级：1峰值回流温度（摄氏度）：NOT SPECIFIED
处于峰值回流温度下的最长时间：NOT SPECIFIEDBase Number Matches：1

MAX8901BETA+TCH8 数据手册

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EVALUATION KIT AVAILABLE  
Highest Efficiency Supply  
for 2 to 6 Series WLEDs in a  
2mm x 2mm TDFN Package  
MAX8901A/MAX8901B  
General Description  
Benefits and Features  
The MAX8901A/MAX8901B step-up converters drive  
from two to six series-connected white LEDs (WLEDs)  
with constant current to provide uniform WLED intensity  
for LCD backlighting in cell phones, PDAs, and other  
handheld devices. The MAX8901_ operate at a fixed  
750kHz (typ) switching frequency, allowing for tiny exter-  
nal components, and are optimized for the highest possi-  
ble efficiency over the full 1-cell Li+/Li-Poly battery range.  
• Cost-Effective and Flexible Solution for Wide Range of  
Backlighting Applications  
• Supplies from 2 to 6 WLEDs with 1.3% LED Current  
Accuracy  
• 2.6V to 5.5V Input Voltage Range  
• Fixed-Frequency Operation  
• Flexible Dimming Control  
• Direct PWM Dimming (MAX8901A)  
• 32-Step, Single-Wire Serial Dimming (MAX8901B)  
These converters use a single input (ON) to enable the  
IC and to control WLED intensity. The MAX8901A  
requires a direct PWM input to regulate WLED intensity  
with the WLED current proportional to the PWM duty  
cycle. The MAX8901B uses single-wire, serial-pulse  
dimming that reduces the WLED intensity in 32 linear  
steps. Full-scale WLED current for serial-pulse  
dimming is 24.75mA (MAX8901B, 0.75mA/step).  
• Protection Features Improve System Reliability  
• WLED Overvoltage Protection (25V typ)  
• Internal Soft-Start and Thermal Shutdown  
• Input Undervoltage Lockout  
• Input Overvoltage Lockout  
• High Efficiency Extends Battery Life  
• Up to 91% Efficiency  
The MAX8901_ feature an internal soft-start to eliminate  
inrush currents during startup, input overvoltage  
protection, WLED overvoltage protection, and a shut-  
down mode with 0.01µA (typ) shutdown current. No  
WLED current is present in shutdown provided the  
WLED forward voltage is greater than the input supply  
voltage. Additional features include undervoltage lock-  
out (UVLO) and thermal shutdown.  
• 0.01µA (typ) Shutdown Current  
• No WLED Current in Shutdown  
• 8-Pin, 2mm x 2mm TDFN Package Saves Space  
Ordering Information  
PART  
PIN-PACKAGE  
TOP MARK  
The MAX8901_ are available in tiny 8-pin, 2mm x 2mm  
TDFN-EP packages (0.8mm max height).  
8 TDFN-EP*  
2mm x 2mm  
MAX8901AETA+T  
+ABA  
8 TDFN-EP*  
2mm x 2mm  
Applications  
MAX8901BETA+T  
+ABB  
Display Backlight (from 2 to 6 WLEDs)  
Cellular Phones  
Note: All devices are specified over the -40°C to +85°C operating  
temperature range.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
PDAs and Smartphones  
MP3 and Portable Media Players  
Portable Navigation Devices  
Digital Cameras  
*EP = Exposed pad.  
T = Tape and reel.  
Pin Configuration appears at end of data sheet.  
Typical Operating Circuits  
INPUT  
INPUT  
2.6V TO 5.5V  
2.6V TO 5.5V  
OUTPUT  
OUTPUT  
UP TO 25V  
UP TO 25V  
3
3
4
1
5
4
1
5
LX  
LX  
IN  
IN  
MAX8901A  
MAX8901B  
7
6
7
6
COMP  
GND  
OVP  
OVP  
COMP  
GND  
SERIAL-PULSE  
DIMMING  
CONTROL  
PGND  
PWM DIMMING  
CONTROL  
PGND  
CS  
2
2
8
8
ON  
ON  
CS  
EP  
EP  
19-0865; Rev 4; 5/15  
1234567...14

中文翻译

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