BQ24751BRHDR ,Multi-Cell Synchronous Switch-mode Charger in 5x5 QFN 28-VQFN -40 to 125FEATURES – < 10 μA Off-State Battery Discharge Current2• NMOS-NMOS Synchronous Buck Converter – < 1 ..
BQ24751RHDR ,Multi-Cell Synchronous Switch-mode Charger with System Power Selector 28-VQFN -40 to 125features reducebattery charge current when the input power limit is reached to avoid overloading th ..
BQ24751RHDT ,Multi-Cell Synchronous Switch-mode Charger with System Power Selector 28-VQFN -40 to 125........ SLUS734D–DECEMBER 2006–REVISED MARCH 2009ADAPTER+ SYSTEMR10 C6 C7RACP P0.010Ω2Ω 10µF 10µFA ..
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BQ24753ARHDT ,Host-Controlled Li-Ion and Li-Polymer Battery Charger with Low Iq and System Power Selector 28-VQFN -40 to 85 SLUS920A–JULY 2009–REVISED JULY 20155 Description (continued)The bq24753A controls external switch ..
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BQ24751BRHDR
Multi-Cell Synchronous Switch-mode Charger in 5x5 QFN 28-VQFN -40 to 125
1FEATURES
APPLICATIONS
DESCRIPTIONACOP
bq24751B
28 LD QFN
TOP VIEWLEARN
SRN
BAT
SRP
SRSET
ACDRV
ACSET
CHGEN
ACN
ACP
ACDET
PVCCBTST HIDR
REGNPH LODR
PGND
OVPSET
AGND
VREF
ADJ
VDAC
ACGOOD
TDR9 1011 1314 26 2524 23 2228
bq24751B
www.ti.com.......................................................................................................................................................... SLUS835A–JULY 2008–REVISED MARCH 2009
Battery Charger with LowIq and System Power Selector <10 μA
Off-State Battery Discharge Current NMOS-NMOS Synchronous Buck Converter – < 1.5 mA Off-State Input Quiescent Current
with 300 kHz Frequency and >95% Efficiency 30-ns Minimum Driver Dead-time and 99.5% Notebook and Ultra-Mobile ComputersMaximum Effective Cycle Portable Data Capture Terminals•
High-Accuracy Voltage and Current Regulation Portable Printers– ±0.5% Charge Accuracy Medical Diagnostics Equipment– ±3% Charge Current Accuracy •
Battery Bay Chargers– ±3% Adapter Current Accuracy •
Battery Back-up Systems– ±2% Input Current Amp Accuracy Integration Automatic System Power Selection From The bq24751B isa high-efficiency, synchronous
AC/DC Adapter battery charger with integrated compensation and
– Internal Loop system power selector logic, offering low component
count for space-constrained multi-chemistry battery
– Internal Soft Startcharging applications. Ratiometric charge current and•
Safety voltage programming allows gor high regulation
– Programmable Overvoltage accuracies, and canbe either hardwired with resistors
Protection (OVP) or programmed by the system power-management
microcontroller usinga DACor GPIOs.
– Dynamic Power (DPM) with
Status Indicator The bq24751B charges two, three,or four series Li+
cells, supportingupto 10Aof charge current, andis
– Programmable Adapter Poweravailableina 28-pin, 5x5-mm thin QFN package.
(ACOP) and Overcurrent (ACOC) Limits Reverse-Conduction Protection Input FET Supports Two, Three,or Four Li+ Cells 5–24V AC/DC-Adapter Operating Range Analog Inputs with Programming
via Resistorsor DAC/GPIO Host Control Charge Voltage V/cell) Charge Currentto10A, with 10-mΩ
Sense Resistor) Adapter Current (DPM) Status and Monitoring Outputs AC/DC Adapter with Programmable
Voltage Threshold Current Drawn from Input Source Battery Learn Cycle Control Supports Any Battery Chemistry: Li+, NiCd,
NiMH, Lead Acid, etc. Charge Enable 28-pin, 5x5-mm QFN package Energy Star LowIqbe aware thatan availability, standard warranty, and usein critical applicationsof Texas
Not Recommended For New Designs
