ETA ETA3421
The ETA3421 is a high-efficiency, DC-to-DC step-down constant current LED driver, capable of delivering up to 0.7A of output current. The device operates from an input voltage range of 3.3V to 5.5V and use 0.1V FB voltage to achieve high efficiency. The incorporated 20-100KHz true PWMDimming feature by EN pin can be used to digitally program the LED current.| Part No. | ETA3421 |
|---|---|
| Datasheet | ETA3421 Download |
| Manufacturer |  ETA |
| Description | High Efficiency LED Driver |
| Buy | Stock & Price |
DESCRIPTION
FEATURES
Running at a fixed frequency of 1.5MHz allows the use of small inductance value and low DCR inductors, thereby achieving higher efficiencies. Other external components, such as ceramic input and output caps, can also be small due to higher switching frequency. Internal soft-start control circuitry reduces inrush current. Short and open LED protection improves design reliability. ETA3421 is housed in a tiny SOT23-5 package.● Up to 90% Efficiency
● 1.5MHz Switching Frequency
● 0.1V FB Voltage
● True PWM Current Program
● Open LED Protection
● Short LED Protection
● Tiny SOT23-5 Package
APPLICATIONS
● IP CAM● 1 Cell Li-Ion Battery Powered Flashlight TYPICAL APPLICATION VIN 4 VIN SW 3 10uF ETA3421 OFF ON 1 EN EN or PWM Dimming GND 2 FB 5 2.2uH IR LED Rs 10uF ILED(A)=0.1/RS(Ω) ORDERING INFORMATION PART No. ETA3421S2F PACKAGE SOT23-5 TOP MARK Pcs/Reel IZ | YW 3000 ETA3421 Rev 1.4 1 Empower, Transcend, Achieve! ETA3421 PIN CONFIGURATION Top View EN 1 5 FB GND 2 ETA3421 SW 3 4 VIN SOT23-5
ABSOLUTE MAXIMUM RATINGS
(Note: Exceeding these limits may damage the device.
