中文
English4.5V to 32V Input, Constant Current Boost HB LED Driver The CXLE8246 is a current mode fixed-frequency PWM controller for high brightness(HB) LED driving applications. The device operates from an in
The CXLE8246 is a current mode fixed-frequency PWM controller for high brightness(HB) LED driving applications. The device operates from an input supply between 4.5V and 32V and provides to drive an external N-channel MOSFET. The CXLE8246 contains all the necessary building blocks including a bandgap reference, a 330KHz oscillator, current-mode control circuitry, chip shutdown block, softstart block and gate driver, etc. LED current is set by an external resistor. Current mode control provides improved transient response and simplified loop compensation. On-chip soft start reduces the inrush current on power up. The other features include chip shutdown, over voltage protection, LED dimming, built-in 5V regulator and slope compensation, etc. The CXLE8246 is available in 10-pin SSOP package
Constant Current HB LED Driver
LED Current Set by an External Resistor
±10% LED Current Accuracy
Peak Current Mode PWM Controller
4.5V to 32V Input Range
330kHz Switching Frequency
PWM Dimming
Cycle-by-Cycle Peak Inductor Current Limit
On-Chip Slope Compensation
Internal Soft-start
Built-in 5V regulator
Low Shutdown Current
Operating Temperature Range: －40℃ to 85℃
Available in 10-pin SSOP package.
Lead-free, Rohs-Compliant and Halogen-free
High Brightness LED Lighting
Flashlight
Building and Street Lighting
Constant Current Power Supply
Portable Devices
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型号 | 工作模式 | 最大LED电流 | 其它功能 | 工作模式 | 工作电压范围 | 封装 |
开关模式</p> | - | 峰值电流模式升压型高亮度LED驱动 | 升压 | 4.5V 到</span> 32V | SSOP10 | |
开关模式</p> | - | 高端电流检测</p> | 降压，升降压 | 4.5V 到</span> 32V | SSOP10 | |
线性模式</p> | 800mA | 内部集成有功率管，温度调制，LED电流可通过外部电阻设置 | SOT89 | |||
线性模式</p> | 1.5A | 内部集成有功率管，温度调制，LED电流可通过外部电阻设置 | 强光,弱光,爆闪和关断，强光,弱光和关断强光,爆闪和关断</p> | SOP8 | ||
线性模式</p> | 1A，内置</span> 32V，持续电流达1A 的功率</span>MOS 晶体管，最大电流</span>1.5A(典型值</span>)，</span>LED 电流检测电压</span>150毫伏,降低了功耗</span> | 芯片内部集成有 130Hz PWM 信号产生电路 | 模拟和<span style=""> PWM 信号实现LED 亮度控制,可实现剧院调光效果</span> | 4V 到</span> 32V | SOP8或DFN8 | |
线性模式</p> | 1.5A，</span>LED 电流精度：±</span>5% | 内置 32V，持续电流达1A 的功率MOS 晶体管，最大电流1.5A(典型值)，高端电流检测，滞环控制：响应速度快，无需补偿 | 采用PWM调光或模拟调光方式，PWM调光频率最高20kHz，恒流输出，±5%电流精度，高压芯片使能输入端，可作为调光端口 | 4V 到 32V，高达25W输出功率 | SOP8或DFN8 | |
开关模式</p> | 最高输出功率25W | SOT23-6 | ||||
线性模式</p> | 1.5A | 内部集成有功率管，过温保护，LED电流可通过外部电阻设置 | SOP8 | |||
线性模式</p> | 1.5A | 内部集成有功率管，过温保护，LED电流可通过外部电阻设置 | 强光,弱光,爆闪和关断，强光,弱光和关断强光,爆闪和关断</p> | SOP8 | ||
线性模式</p> | 800mA | 内部集成有功率管，过温保护，LED电流可通过外部电阻设置 | SOT89-5 | |||
线性模式</p> | 1000mA | 内部集成有功率管，过温保护，LED电流可通过外部电阻设置 | TO252-5 | |||
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