ETA2831

 

 

 

FEATURES

The ETA2831 is a total solution IC specifically for high voltage USB

charging applications. It includes a wide input range, high-efficiency, and

high frequency DC-to-DC step-down switching regulator that is capable

of delivering up to 4A of output current and a low side USB current limiting

switch. The DC-DC in ETA2831 is a current mode converter with a fixed-

frequency that is externally adjustable. There is also a cable resistance

compensation feature that allows users to adjust the output voltage to

compensate for the voltage drop due to cable resistance.

An OVP function protects the IC itself and its downstream system against

input voltage surges. With this OVP function, the IC can stand off input

voltage as high as 42V, making it an ideal solution for industrial

applications such as smart meters as well as automotive applications. In

automotive systems, power comes from the battery, with its voltage

typically ranges between 9V and 24V. Including cold crank and double

battery jump-starts, the minimum input voltage may be as low as 4V and

the maximum up to 36V, This makes ETA2831 ideal for the automotive

application.

There is also a low side current limiting USB switch in ETA2831. The

current limit is internally set at 1A. Since the total output current limit of

the DCDC can be externally adjusted with a resistor, this 1A USB switch

Wide Input Operating Range from 4V to 36V

Standoff Input Voltage: 42V

High Efficiency at 12V In 5V Out: Up to 91%:

High Efficiency PFM mode at light load

Capable of Delivering 3.5A output current

Peak Output Current up to 4A

Cable resistance compensation

Adjustable Switching frequency

Adjustable Output current limit

Frequency dithering Option for low EMI available

Current Mode control

Logic Control Shutdown

Thermal shutdown and UVLO

APPLICATIONS

Car Charge ports

Multi-cell Li-ion Battery Charger

 

ORDERING INFORMATION

PART

PACKAGE

TOP MARK

ETA2831Q3Q

QFN3X3-16

ETA2831

  

TYPICAL APPLICATION

 

 

    

 

For Car Charger                                             For General Purpose