Datasheet Texas Instruments BQ24750ARHDT — Ficha de datos

Not recommended for New Designs bq24750A
www.ti.com . SLUS834A – JULY 2008 – REVISED MARCH 2009 Host-Controlled Multi-Chemistry Battery Charger with Low Iq and Integrated System
Power Selector PGND REGN LODRV PH 28 27 26 25 24 23 22 CHGEN 1 21 DPMDET ACN 2 20 CELLS ACP 3 bq24750A 19 SRP ACDRV 4 28 LD QFN 18 SRN ACDET 5 TOP VIEW 17 BAT ACSET 6 16 SRSET ACOP 7 15 IADAPT 9 10 11 12 13 14 BATDRV 8 ACGOOD The bq24750A is a high-efficiency, synchronous
battery charger with integrated compensation and
system power selector logic, offering low component
count for space-constrained multi-chemistry battery
charging applications. Ratiometric charge current and
voltage programming allows high regulation
accuracies, and can be either hardwired with resistors
or programmed by the system power-management
microcontroller using a DAC or GPIOs. VADJ DESCRIPTION VDAC Notebook and Ultra-Mobile Computers
Portable Data-Capture Terminals
Portable Printers
Medical Diagnostics Equipment
Battery Bay Chargers
Battery Back-up Systems HIDRV VREF APPLICATIONS PVCC BTST NMOS-NMOS Synchronous Buck Converter
with 300 kHz Frequency and >95% Efficiency
30-ns Minimum Driver Dead-time and 99.5%
Maximum Effective Duty Cycle
High-Accuracy Voltage and Current Regulation
– ±0.5% Charge Voltage Accuracy
– ±3% Charge Current Accuracy
– В±3% Adapter Current Accuracy …