ETA2840高耐压大电流LED驱动芯片
ETA2840是一款输入耐压达到42V，同步降压，电流可达1A的LED恒流驱动芯片
DESCRIPTION
The ETA2840 is a wide input range, high-efficiency, and high frequency DC-to-DC step-down LED driver, capable of delivering up to 1.5A of output current.
ETA2840 provide 0.15V feedback voltage, which minimize the power loss on the sense resistor in a LED driver system. With a fixed switching frequency of 600KHz, This current mode PWM controlled LED Driver allows the use of small external components, such as ceramic input and output caps, as well as small inductors.
ETA2840 also employs a proprietary control scheme that switches the device into a power save mode during light load, thereby extending the range of high efficiency operation. An OVP function protects the IC itself and its downstream system against input voltage surges. With the hysteresis, EN can be controlled by the ambient light-sensitive resistor.
ETA2840 is available in a space-saving SOT23-6 package.
FEATURES
Wide Input Operating Range from 4.5V to 36V
Standoff Input Voltage: 42V
High Efficiency PFM mode at light load
Capable of Delivering 1.5A
No External Compensation Needed
Current Mode control
Logic Control Shutdown
En can be controlled by ambient light
Thermal shutdown and UVLO
Available in SOT23-6 Package
APPLICATIONS
IR LED driver for surveillance camera
LED lighting
Constant current source
