The CXLE8222 is a continuous mode inductive step-down converter, designed for driving
single or multiple series connected LEDs efficiently from a voltage source higher than
the LED voltage. The device operates from an input supply between 6V and 32V and provides
an externally output current up to 1.4A. Depending upon supply voltage and external
components, this can provides up to 24 watts of output power.
The CXLE8222 includes the output switch and a high-side output current sensing circuit,
which uses an external resistor to set the nominal average output current. Output current
can be adjusted by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. During DC dimming, this will provide a
continuous output current that is proportional to the external applied DC voltage.
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[ CXLE8222 ]"
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（PDF文档）
一.产品概述
The CXLE8222 is a continuous mode inductive step-down converter, designed for driving
single or multiple series connected LEDs efficiently from a voltage source higher than
the LED voltage. The device operates from an input supply between 6V and 32V and provides
an externally output current up to 1.4A. Depending upon supply voltage and external
components, this can provides up to 24 watts of output power.
The CXLE8222 includes the output switch and a high-side output current sensing circuit,
which uses an external resistor to set the nominal average output current. Output current
can be adjusted by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. During DC dimming, this will provide a
continuous output current that is proportional to the external applied DC voltage. During
the PWM dimming, this will provide a gated output current and the average current is proportional to the duty cycle. Applying a voltage of 0.2V or lower to the ADJ pin turns
the output off and switches the device into a low current standby state.
二.产品特点
Simple low parts count
Internal 32V NDMOS switch
Up to 1.4A output current
Single pin on/off and brightness control using DC voltage or PWM
Soft Start
High efficiency (up to 97%)
Wide input voltage range: 6V to 32V
Output shutdown
Up to 1MHz switching frequency
Inherent open-circuit LED protection
Typical 4% output current accuracy
High-side current sense
Hysteretic control: no compensation
AdjustaJTMBe constant LED current
Over temperature protection
Pb-free SOT89-5 packages
三.应用范围
Low voltage halogen replacement LEDs
Automotive lighting
Low voltage industrial lighting
LED back-up lighting
Illuminated signs
LCD TV backlighting
四.技术规格书（产品PDF)
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！
五.产品封装图
六.电路原理图
七.相关芯片选择指南
| DC/DC LED驱动(DC/DC LED Driver) | ||||||||
| Part No. | Features | Mode | VIN | IOUT | Current Accu. | EMI/EMC | IQ | Package |
| CXLE8222 | High Brightness Step-down LED Driver With Internal Switch Driving Up To 9 High Power LEDs, Operating Temperature Range: -40~125℃ | Hysteretic Control,1MHz Max | 6~32V | 1.4A | ±4% | 优化处理 | 50μA | SOT89-5 |
