中文
EnglishCXLE8628A /CXLE8628B is a constant current regulator for driving LEDs with low quiescent current and low dropout voltage. The current is adjustable from 10mA to1A with an external resistor,
目录
1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档）
5.产品封装图</span> 6.电路原理图</span> 7.功能概述 8.相关产品
一,产品概述(General Description) 
The CXLE8628A is a constant current regulator for driving LEDs with
low quiescent current and low dropout voltage. The current is adjustable
from 10mA to1A with an external resistor.
The CXLE8628B is only a controller , and must be connected to an
external NMOS. CXLE8628B is an external transistor, is suitable for
applications requiring a high output current . The output current of
CXLE8628B can be adjusted by external DC control voltage or PWM
control.Only one external resistor is required to achieve a constant current
LED driver. Soft start , thermal protection and low voltage protection are
also provided.
The driver pin EXT is provided for current and voltage extension. Adding
an external NMOS or NPN transistor to this pin can extend current and
voltage range.
二.产品特点(Features)
CXLE8628B is only a controller , and must be
connected to an external NMOS.
The output current of CXLE8628B is adjustable
Sink current:10mA to1A adjustable with an external resistor
Current and voltage range extendable by adding an
external NMOS or NPN transistor
Power supply voltage: 2.7-18V
Low drop out voltage: 50mV@1A
Low quiescent current: 80uA
Thermal Shutdown protection：165℃ Soft start
Low voltage protection: 2.5V
Package: CXLE8628A: SOT89-5, ESOP8
CXLE8628B: SOT23-5
三,应用范围 (Applications)
Power Led driver and controller
四.技术</span>规格书下载（产品PDF）</span>
需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持</span>！</span>
五,产品封装图 (Package)
六.电路原理图</span>
七</span>,功能概述
ParaMEter | Symbol | Conditions | Min. | Typ. | Max. | Units |
Sink Current | I sink | VDD=3.6V | 10 | 1000 | mA | |
Input Voltage | VDD | I sink=1A | 2.7 | 18 | V | |
CS Voltage | VCS | 95 | 100 | 105 | mV | |
Sink current accuracy | △ILED/ILED | I sink=1A | -5 | -2.5 | 5 | % |
Load Regulation | LDR | VLED=0.2V to 3V | 0.1 | 2 | mA/V | |
Line Regulation | LNR | VLED= 3V | 0.4 | 2 | mA/V | |
Output dropout | V drop | VDD=3.6V, VLED= 0.5V | 50 | 100 | mV | |
Quiescent Current | ISS | VDD=3.6V | 80 | 100 | uA | |
Low Voltage | 2.3 | 2.5 | 2.7 | V | ||
Low voltage hysteresis | Vhys | 0.15 | V | |||
Maximal EXT Voltage | VEXT | VDD=5.0V,VCS=0V | 2.5 | 3.6 | 4.5 | V |
Thermal Shutdown | Tsd | 165 | ℃</p> |
八,相关芯片选择指南 更多同类产品......
| 线性恒流LED驱动电路(Linear Constant LED Driver) | |||||||||
| Part No. | Mode | VIN | No. Channels | Driving Current | Freq. (MHz) | Accu. | Channel Matching | Package | Application |
| CXLE8622 | Linear | 2.7~6V | 3 | 20mAx3 | N/A | ±3% | N/A | SOT23-6 | PHONE,PDA,GPS |
| CXLE8623 | Linear | 2.8~5.5V | 4 | 20mA×4 | N/A | ±3% | ±3% | MSOP8 | PHONE,PDA,GPS |
| Linear Constant LED Driver(线性恒流LED驱动电路) | |||||
| Part Number | VIN | IOUT | Accu | Application | Package |
| CXLE8628 | 2.7-18V | 1000mA | ±5% | LED Lighting | SOT89-5 |
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