Battery Charge Controller Li-Ion 1mA 0V to 3.3V 20-Pin VQFN EP T/R, BQ24735RGRT, Texas Instruments

The bq24735 device is a high-efficiency, synchronous battery charger, offering low component count for space-constrained, multichemistry battery charging applications. The bq24735 device supports turbo boost by allowing battery discharge energy to the system when system power demand is temporarily higher than the adapter maximum power level so the adapter will not crash.The bq24735 device uses two charge pumps to separately drive N-channel MOSFETs (ACFET, RBFET, and BATFET) for automatic system power source selection.SMBus controlled input current, charge current, and charge voltage digital-to-analog converters (DACs) allow for very high-regulation accuracies that can be easily programmed by the system power management microcontroller. The bq24735 device uses an internal input current register or an external ILIM pin to throttle down PWM modulation to reduce the charge current. The bq24735 device charges 1-, 2-, 3-, or 4-series Li+ cells.

Adapter and Battery Provide Power to System
Together to Support Intel^® CPU Turbo Boost
Mode

SMBus Host-Controlled NMOS-NMOS
Synchronous Buck Converter With Programmable
615-, 750-, and 885-kHz Switching Frequencies

Automatic N-Channel MOSFET Selection of
System Power Source From Adapter or Battery
Driven by Internal Charge Pumps

Enhanced Safety Features for Overvoltage
Protection, Overcurrent Protection, Battery,
Inductor and MOSFET Short-Circuit Protection

Programmable Input Current, Charge Voltage,
Charge Current Limits

±0.5% Charge Voltage Accuracy up to 19.2 V
±3% Charge Current Accuracy up to 8.128 A
±3% Input Current Accuracy up to 8.064 A
±2% 20× Adapter Current or Charge Current
Amplifier Output Accuracy

Programmable Battery Depletion Threshold, and
Battery LEARN Function

Programmable Adapter Detection and Indicator

Integrated Loop Compensation and Soft Start

Real-Time System Control on ILIM Pin to Limit
Charge Current

AC Adapter Operating Range: 4.5 V to 24 V

5-µA Off-State Battery Discharge Current

0.65 mA (0.8 mA Max) Adapter Standby
Quiescent Current

Характеристики

Battery_type	Li-Ion
Operating_temperature	0 to 125 °C
Specifications	http://www.ti.com/general/docs/lit/getliterature.tsp?genericPartNumber=BQ24735&&fileType=pdf
Schedule_b	8542390000
Product_dimensions	3.65 x 3.65 x 0.95 mm
Pin_count	20
Output_voltage	0 to 3.3 V
Output_current	1 mA
Supplier_package	VQFN EP
Msl_level	2
Бренд	Texas Instruments
Mounting	Surface Mount
Max_processing_temp	260
Lead_finish	Gold
Kind	Battery Charger Controller
Htsn	8542390001
Eccn	EAR99
Country_of_origin	United States

Артикул: BQ24735RGRT

Описание