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 intermal 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.
Input Voltage : 8V to 36V
Vout Accuracy (VFe=1V) +2%
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
Extermal current limit setting.
Over Voltage Protection5.8V.
Built in adjustable line-compensation.
PSOP-8 Pb-Free package
应用
Car charger
Portable charger Device.