SY21401DBC

The SY21401 is a current mode DC/DC controller targeted for Boost, SEPIC, Flyback and Forward applications. The SY21401 has an accurate DC input current limit. External compensation provides flexible adjustment of control loops for different applications. The internal low side driver is capable of sourcing 1.5A and sinking 3A current.

Datasheet

SY21401DBC The SY21401 is a current mode DC/DC controller targeted for Boost, SEPIC, Flyback and Forward applications. The SY21401 has an accurate DC input current limit. External compensation provides flexible adjustment of control loops for different applications. The internal low side driver is capable of sourcing 1.5A and sinking 3A current. Datasheet

Parameters
Features
Description

Part Number	SY21401DBC
Vin_min (V)	3
Vin_max (V)	25
Io_max (A)
Channels
Vref (V)	1
Vref Accuracy
Fsw (MHz)	0.5
Iq (uA)
Temp Range
Topology
Soft Start
Features / Special Function	Current mode DC/DC controller targeted for Boost, SEPIC, Flyback and Forward applications with DC Input Current Limit
Package	DFN3x3-10

Input Voltage Range 3V to 25V
500kHz Fixed Switching Frequency
An Accurate DC Input Current Limit
External Compensation
Internal Soft-start Limits the Inrush Current
Integrated Low Side Driver:1.5ASourcing and3ASinking
RoHS Compliant and Halogen Free
Compact Package: DFN3×3-10

Evaluation Board

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SY21401DBC_1

EVB File

The EVB_SY21401DBC_1 is intended for evaluating 6~18V input, 4A input current limit, 12V output SEPIC applications.

Photo of evaluation board
Photo of evaluation board
Photo of evaluation board

EVB_SY21401DBC_2

EVB File

The EVB_SY21401DBC_2 is intended for evaluating 6~8.4V input, 2A output current, 12V output Boost applications.

Technical Documentation

Title	Date
Automotive Solutions Q1 2024	2024-02-02
Consumer Selection Guide Q1 2024	2024-01-16
Industrial Designs Q1 2024	2024-01-16
DFN3x3-10	2022-05-20