BQ24715 Datasheet, PDF (1/8 Pages) Texas Instruments – 2-3 Cell NVDC-1 Battery Charger Controller with Ultra-Fast Transient Response and High Light-Load Efficiency

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bq24715
SLUSBD1 – FEBRUARY 2013
2-3 Cell NVDC-1 Battery Charger Controller
with Ultra-Fast Transient Response and High Light-Load Efficiency
Check for Samples: bq24715
FEATURES
1
• 6-24V Input SMBus NVDC-1 2-3S Battery
Charger Controller
• System Instant-on Operation with No Battery
or Deeply Discharged Battery
• Ultra-Fast Transient Response of 100 µs
• Ultra-Low Quiescent Current of 500 µA and
High PFM Light Load Efficiency 80% at 20mA
load to Meet Energy Star and ErP Lot6
• Switching Frequency: 600kHz/800kHz/1MHz
• Programmable System/Charge Voltage (16
mV/step), Input/Charge Current (64 mA/step)
with High Accuracy
– ±0.5% Charge Voltage Regulation
– ±3% Input/Charge Current Regulation
– ±2% 40x Input/16x Discharge Current
Monitor Output
• Support Battery LEARN Function
• Maximize CPU Performance with Deeply
Discharged Battery or No Battery
• Integrated NMOS ACFET and RBFET Driver
• 20-pin 3.5 x 3.5 mm² QFN Package
APPLICATIONS
• Ultrabook, Notebook, and Tablet PC
• Industrial and Medical Equipment
• Portable Equipment
DESCRIPTION
The bq24715 is a NVDC-1 synchronous battery
charge controller with low quiescent current, high light
load efficiency for 2S or 3S Li-ion battery charging
applications, offering low component count.
The power path management allows the system to be
regulated at battery voltage but does not drop below
the programmable system minimum voltage.
The bq24715 provides N-channel ACFET and RBFET
drivers for the power path management. It also
provides driver of the external P-channel battery FET.
The loop compensation is fully integrated.
The bq24715 has programmable 11-bit charge
voltage, 7-bit input/charge current and 6-bit minimal
system voltage with very high regulation accuracies
through the SMBus communication interface.
The bq24715 monitors adapter current or battery
discharge current through the IOUT pin allowing the
host to throttle down CPU speed when needed.
The bq24715 provides extensive safety features for
over current, over voltage and MOSFET short circuit.
Adaptor
6-24V
Simplified Application Diagram
Optional
N-FET
Driver
Ultra-Fast
DPM
Iin
Ultra-Low Quiescent
Current
Support CPU Turbo Mode
To System
Enhanced Safety
Features
OCP, OVP,
FET Short
bq24715
Adaptor Detection
Ichg
SMBus Controls V and I
with High Accuracy
NVDC-1
Charger
Controller
HOST
SMBus
Iin, Idischarge
Integrated Compensation Internal Soft Start
PMOS BAT
FET Driver
2S-3S
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data and
other specifications are design goals. Texas Instruments reserves
the right to change or discontinue these products without notice.
Copyright © 2013, Texas Instruments Incorporated