Rev1.0

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SE2490

2.8A，Wide-Input Sensorless CC/CV Step-Down

DC/DC Converter

Typical Application

Description

SE2490 is a wide input voltage, high efficiency

Active CC step-down DC/DC converter that operates

in either CV (Constant Output Voltage) mode or CC

(Constant Output Current) mode.

SE2490

consists

of

step-down

switching

regulator with PWM control. The device includes a

reference voltage source, oscillation circuit, error

amplifier and etc.

SE2490

provides

low-ripple

power,

high

efficiency, and excellent transient characteristics. The

PWM control circuit is able to the duty ratio linearly

forms 0 up to 90%. An over current protection function

is built outside that it can set by a resistance. An

external compensation is easily to system stable; the

low ESR output capacitor can be used.

With the addition of an internal N-channel Power

MOS, a coil, capacitors, and a diode connected

externally, these ICs can function as step-down

switching regulators. They serve as ideal power

supply units for portable devices when coupled with

the PSOP-8 packages, providing such outstanding

features as low current consumption. Since this

converter can accommodate an input voltage up to

36V.

Features



Input Voltage：8V to 36V





CC/CV mode(Constant Current and Constant

Voltage)



Up to 2.8A output current



±3%/±5%/15%Current limit Accuracy



Duty ratio：0% to 90% PWM control



Oscillation frequency：250KHz



Thermal Shutdown function.



Short Circuit Protect (SCP).



Built-in internal LX N-channel MOS.



Current mode non-synchronous PWM converter



External current limit setting.



Over Voltage Protection5.8V.



Built in adjustable line-compensation.

Application



Car charger