6-A Smart Load Switch Battery Charger

RT9748

The RT9748 is a 6-A smart load switch battery charger that integrates an internal load switch with charge pump control and 4-path constant current/constant voltage regulation, a 5-way hardware protection, and a 10-channel 12-bit analog-to-digital converter. The RT9748 provides accurate analog-to-digital converter for voltage/current measurement through I²C serial interface to report the battery charging parameters and 3-way software protection and flags.

Applications

Handheld Products
Portable Media Players

Key Spec.

	RT9748
Status	EOL
Recommended Alternative	RT9756A
Vin (min) (V)	3
Vin (max) (V)	6
Battery Charge Voltage (max) (V)	6
Battery Charge Current (max) (A)	6.35
Status Indicator	No
Input Source	USB
Features	Enable Input;I2C;OCP;OVP
Package Type	WL-CSP2.75x3.05-42(BSC)
Built-in Power MOSFETs	Yes

Features

Internal Load Switch with Charge Pump Control
► Dual NFETs in a Back to Back Configuration
► Internal Charge Pump Control
4-Path CC/CV Regulation
► Input Current Regulation (ICR)
► Output Voltage Regulation (OVR)
► Battery Voltage Regulation (BVR)
► Battery Current Regulation (BCR)
5-Way Hardware Protection
► VBUS Overvoltage Protection (VBUS_OVP)
► Drop-Out Overvoltage Protection (VDR_OVP)
► Reverse Overcurrent Protection (RE_OCP)
► Junction Over-Temperature Protection (TJ_OTP)
► Input Overcurrent Protection (IOC_OCP)
10-Channel 12-bit ADC
► High Accuracy of 12-bit Resolution
► 10-Channel for Voltage/Current Measurement
► High Speed Data Rate for 8/16 Times Average Per Channel
3-Way Software Protection
► Drop-Out Overvoltage Protection Alarm (VDR_ALM)
► TS of the VBUS Over-Temperature Protection (TBUS_OTP)
► TS of the BAT Over-Temperature Protection (TBAT_OTP)

Datasheet

DS9748-00.pdf

Datasheet

DS9748-00.pdf