SE2490 Datasheet, PDF (1/11 Pages) Seaward Electronics Inc. – 2.8A，Wide-Input Sensorless CC/CV Step-Down DC/DC Converter

SE2490
2.8A，Wide-Input Sensorless CC/CV Step-Down
DC/DC Converter
Description
Features
SE2490 is a wide input voltage, high efficiency  Input Voltage：8V to 36V
Active CC step-down DC/DC converter that operates  Vout Accuracy (V_FB=1V) ±2%
in either CV (Constant Output Voltage) mode or CC  CC/CV mode(Constant Current and Constant
(Constant Output Current) mode.
Voltage)
SE2490 consists of step-down switching  Up to 2.8A output current
regulator with PWM control. The device includes a  ±3%/±5%/15%Current limit Accuracy
reference voltage source, oscillation circuit, error  Duty ratio：0% to 90% PWM control
amplifier and etc.
 Oscillation frequency：250KHz
SE2490 provides low-ripple power, high  Thermal Shutdown function.
efficiency, and excellent transient characteristics. The  Short Circuit Protect (SCP).
PWM control circuit is able to the duty ratio linearly  Built-in internal LX N-channel MOS.
forms 0 up to 90%. An over current protection function  Current mode non-synchronous PWM converter
is built outside that it can set by a resistance. An  External current limit setting.
external compensation is easily to system stable; the  Over Voltage Protection5.8V.
low ESR output capacitor can be used.
 Built in adjustable line-compensation.
With the addition of an internal N-channel Power  PSOP-8 Pb-Free package
MOS, a coil, capacitors, and a diode connected
externally, these ICs can function as step-down
switching regulators. They serve as ideal power _Application
supply units for portable devices when coupled with
 Car charger
the PSOP-8 packages, providing such outstanding
 Portable charger Device.
features as low current consumption. Since this
converter can accommodate an input voltage up to
36V.
Typical Application
Rev1.0
Preliminary and all contents are subject to change without prior notice
© Seaward Electronics Inc., 2014. • www.seawardinc.com.cn • Page 1