SY20741QDC (SY6924QDC)

High Efficiency, 2.5A, Multi-Cell Li-Ion Battery Charger

SY20741QDC High Efficiency, 2.5A, Multi-Cell Li-Ion Battery Charger Datasheet

Parameters
Features
Description

Part number	SY20741QDC
Vin (max) (V)	14
Vin (min) (V)	4
Absolute max Vin (max) (V)
Number of series cells	1,2
Charge voltage (max) (V)
Charge voltage (min) (V)
Charge current (max) (A)	2.5
Charge current (min) (A)
Integrated FETs(Yes/No)
Topology
Control interface
Features	Blocking FET integrated
Operating temperature range(°C)
Package	QFN3x3-16

Integrated Synchronous Buck and Reverse Blocking FET with 16V Rating
Adaptive Input Power Limit for 4-14V Wide Input Voltage
Maximum 2.5A Programmable Charge Current
4.2V and 4.35V Constant Voltage Selectable
+/-0.5% Cell Voltage Accuracy
Support Single-cell or Two-cell Battery Pack
External Shutdown Function
Input Voltage UVLO and OVP
Thermal Fold-back Protection
Over Temperature Protection
Battery Short Protection
Programmable Charge Timeout
Charge Status Indication
Low Profile QFN3×3 Package for Portable Applications

The SY20741 is a multi-cell Li-Ion battery step-down charger designed for a 4-14V input range, capable of delivering a charge current of up to 2.5A. The charge current can be adjusted using an external resistor, offering flexibility for various portable applications.

The charger features programmable charge timeout and adaptive input power limit functions, enhancing the safety of battery charging operations. The device includes 16V rated power switching and reverse blocking MOSFETs with extremely low ON resistance, ensuring high charge efficiency and simple peripheral circuit design.

Short-circuit, Charge Timeout and temperature protection are provided for reliable operation.

The open-drain STAT output can be used to indicate the battery state of charge.

The SY20741 is available in a compact QFN3×3 package.