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BQ24750ARHDRTIN/a5avaiHost-controlled Multi-chemistry Battery Charger w/Integrated Sys Power Selector 28-VQFN -40 to 125
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BQ24750ARHDR-BQ24750ARHDT
Host-controlled Multi-chemistry Battery Charger w/Integrated Sys Power Selector 28-VQFN -40 to 125
1FEATURES
APPLICATIONS
DESCRIPTION

ACOP
bq24750A
28 LD QFN
TOP VIEW

DPMDET
SRN
BAT
CELLS
SRP
SRSET
ACDRV
ACSET
CHGEN
ACN
ACP
ACDET
PVCCBTST HIDR
REGNPH LODR
PGND
AGND
VREF
ADJ
VDAC
ACGOOD
TDR 9 10 11 13 14 27 26 2524 23 22
bq24750A
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SLUS834A–JULY 2008–REVISED MARCH 2009 Battery Charger with LowIq and Integrated System
Power Selector
28-pin, 5x5-mm QFN package NMOS-NMOS Synchronous Buck Converter Energy Star LowIq
with 300 kHz Frequency and >95% Efficiency – <10
μA Off-State Battery Discharge Current 30-ns Minimum Driver Dead-time and 99.5% – < 1.5 mA Off-State Input Qiescent Current
Maximum Effective Cycle
High-Accuracy Voltage and Current Regulation Notebook and Ultra-Mobile Computers– ±0.5% Charge Accuracy Portable Data-Capture Terminals– ±3% Charge Current Accuracy Portable Printers– ±3% Adapter Current Accuracy Medical Diagnostics Equipment– ±2% Input Current Amp Accuracy Battery Bay Chargers Integration Battery Back-up Systems– Automatic System Selection From
AC/DC Adapter Internal Loop
The bq24750A isa high-efficiency, synchronous– Internal Soft Start battery charger with integrated compensation and• Safety system power selector logic, offering low component
count for space-constrained multi-chemistry battery– Input Overvoltage (OVP) charging applications. Ratiometric charge current and– Dynamic Power (DPM) with voltage programming allows high regulationStatus Indicator accuracies, and canbe either hardwired with resistors Programmable Adapter Power or programmed by the system power-management
(ACOP) and Overcurrent (ACOC) Limits
microcontroller usinga DACor GPIOs. Reverse-Conduction Protection Input FET Battery Thermistor Sense Input (TS) for
Charge Qualification
Supports Two, Three, 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, with10 mΩ
sense resistor) Adapter Current (DPM)
Status and Monitoring Outputs AC/DC Adapter Present with Programmable
Voltage Threshold DPM Loop Active Current Drawn from Input Source
Supports Any Battery Chemistry: Li+, NiCd,
NiMH, Lead Acid, etc. Charge Enable

Not recommended for New Designs
ic,good price


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