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bq24715 Controller Datasheet |
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| Part Number | bq24715 |
| Description | 2-3 Cell NVDC-1 Battery Charger Controller |
| Manufacture | etcTI |
| Total Page | 30 Pages |
| Datasheet |
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bq24715
SLUSBD1B – MARCH 2013 – REVISED SEPTEMBER 2016
bq24715 2-3 Cell NVDC-1 Battery Charger Controller
with Ultra-Fast Transient Response and High Light-Load Efficiency
1 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
2 Applications
• Ultrabook, Notebook, and Tablet PC
• Industrial and Medical Equipment
• Portable Equipment
3 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 v 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.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
bq24715
VQFN (20)
3.50 mm × 3.50 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Simplified Application Diagram
Adaptor
6-24V
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
Adaptor Detection
bq24715
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
Copyright © 2016, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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bq24715
SLUSBD1B – MARCH 2013 – REVISED SEPTEMBER 2016
www.ti.com
Table of Contents
1 Features .................................................................. 1
2 Applications ........................................................... 1
3 Description ............................................................. 1
4 Simplified Application Diagram............................ 1
5 Revision History..................................................... 2
6 Pin Configuration and Function ........................... 3
7 Specifications......................................................... 4
7.1 Absolute Maximum Ratings ...................................... 4
7.2 ESD Ratings.............................................................. 4
7.3 Recommended Operating Conditions ...................... 5
7.4 Thermal Information .................................................. 5
7.5 Electrical Characteristics........................................... 6
7.6 Timing Requirements .............................................. 10
7.7 SMBus Timing Characteristics................................ 11
7.8 Typical Characteristics ............................................ 13
8 Detailed Description ............................................ 14
8.1 Overview ................................................................. 14
8.2 Functional Block Diagram ....................................... 15
8.3 Feature Description................................................. 16
8.4 Device Functional Modes........................................ 18
8.5 Programming........................................................... 21
9 Application and Implementation ........................ 28
9.1 Application Information............................................ 28
9.2 Typical Application ................................................. 28
10 Power Supply Recommendations ..................... 34
11 Layout................................................................... 35
11.1 Layout Guidelines ................................................. 35
11.2 Layout Example .................................................... 36
12 Device and Documentation Support ................. 37
12.1 Third-Party Products Disclaimer ........................... 37
12.2 Receiving Notification of Documentation Updates 37
12.3 Community Resources.......................................... 37
12.4 Trademarks ........................................................... 37
12.5 Electrostatic Discharge Caution ............................ 37
12.6 Glossary ................................................................ 37
13 Mechanical, Packaging, and Orderable
Information ........................................................... 37
5 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision A (February 2014) to Revision B
Page
• Added Full Production Data specifications to data sheet ...................................................................................................... 4
Changes from Original (March 2013) to Revision A
Page
• Added device number to the title and added Device Info table per the new data sheet template......................................... 1
• Changed comment for Address 0x15H in Table 2 from "Any value below 4.096V results in 4.096V" to "Any value
below 4.096V results in default value".................................................................................................................................. 22
• Changed Setting Input Current description text string from "Thereafter, all input current goes to system load and
input current increases" to "Keep increasing the system current and the battery will run into supplement mode." ............ 27
• Changed conditions statement for Figure 16 ....................................................................................................................... 33
• Changed conditions statement forFigure 17......................................................................................................................... 33
2 Submit Documentation Feedback
Product Folder Links: bq24715
Copyright © 2013–2016, Texas Instruments Incorporated
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| Features | Product Folder Sample & Buy Technical Documents Tools & Software Support & Community bq24715 SLUSBD1B – MARCH 2 013 – REVISED SEPTEMBER 2016 bq24715 2-3 Cell NVDC-1 Battery Charger Control ler with Ultra-Fast Transient Response and High Light-Load Efficiency 1 Featu res •1 6-24V Input SMBus NVDC-1 2-3S Battery Charger Controller • System I nstant-on Operation with No Battery or Deeply Discharged Battery • Ultra-Fas t Transient Response of 100 µs • Ult ra-Low Quiescent Current of 500 µA and High PFM Light Load Efficiency 80% at 20mA load to Meet Energy Star and ErP L ot6 • Switching Frequency: 600kHz/800 kHz/1MHz • Programmable System/Charge Voltage (16 mV/step), Input/Charge Cur rent (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 LEAR N Function • Maximize CPU Performance with Deeply Discharged Battery or No Battery • Integrated NMOS ACFET and RBFET Driver • 20-pi. |
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