Home Power management Battery management ICs Battery charger ICs

BQ24170

ACTIVE

Standalone 1-3 cell 4A synchronous Buck battery charger with Power Path selector

Product details

Number of series cells 1, 2, 3 Charge current (max) (A) 4 Vin (max) (V) 17 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 13.5 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
Number of series cells 1, 2, 3 Charge current (max) (A) 4 Vin (max) (V) 17 Cell chemistry Li-Ion/Li-Polymer Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 13.5 Absolute max Vin (max) (V) 20 Control topology Switch-Mode Buck Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Power Path Vin (min) (V) 4.5 Rating Catalog Operating temperature range (°C) -40 to 85
VQFN (RGY) 24 19.25 mm² 5.5 x 3.5
  • 1.6-MHz Synchronous Switched-Mode Charger
    with 4-A Integrated N-MOSFETs
  • Up to 94% Efficiency
  • 30-V Input Rating with Adjustable Overvoltage
    Protection
    • 4.5-V to 17-V Input Operating Voltage Range
  • Battery Charge Voltage
    • bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
    • bq24172: Adjustable Charge Voltage
  • High Integration
    • Automatic Power Path Selector Between
      Adapter and Battery
    • Dynamic Power Management
    • Integrated 20-V Switching MOSFETs
    • Integrated Bootstrap Diode
    • Internal Digital Soft Start
  • Safety
    • Thermal Regulation Loop Throttles Back
      Current to Limit TJ = 120°C
    • Thermal Shutdown
    • Battery Thermistor Sense Hot/Cold Charge
      Suspend and Battery Detect
    • Adjustable Input Overvoltage Protection
    • Cycle-by-Cycle Current Limit
  • Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±4% Charge Current Regulation
    • ±4% Input Current Regulation
  • <15-µA Battery Current With Adapter Removed
  • <1.5-mA Input Current With Adapter Present and
    Charge Disabled
  • 1.6-MHz Synchronous Switched-Mode Charger
    with 4-A Integrated N-MOSFETs
  • Up to 94% Efficiency
  • 30-V Input Rating with Adjustable Overvoltage
    Protection
    • 4.5-V to 17-V Input Operating Voltage Range
  • Battery Charge Voltage
    • bq24170: 1-, 2-, or 3-Cell with 4.2 V/Cell
    • bq24172: Adjustable Charge Voltage
  • High Integration
    • Automatic Power Path Selector Between
      Adapter and Battery
    • Dynamic Power Management
    • Integrated 20-V Switching MOSFETs
    • Integrated Bootstrap Diode
    • Internal Digital Soft Start
  • Safety
    • Thermal Regulation Loop Throttles Back
      Current to Limit TJ = 120°C
    • Thermal Shutdown
    • Battery Thermistor Sense Hot/Cold Charge
      Suspend and Battery Detect
    • Adjustable Input Overvoltage Protection
    • Cycle-by-Cycle Current Limit
  • Accuracy
    • ±0.5% Charge Voltage Regulation
    • ±4% Charge Current Regulation
    • ±4% Input Current Regulation
  • <15-µA Battery Current With Adapter Removed
  • <1.5-mA Input Current With Adapter Present and
    Charge Disabled

The bq2417x device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.

The device charges the battery in three phases: precondictioning, constant current, and constant voltage.

Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. The bq2417x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.

The bq2417x features Dynamic Power Management (DPM) to reduce the charge current when the input power limit is reached to avoid overloading the adapter. A highly accurate current-sense amplifier enables precise measurement of input current from adapter to monitor overall system power.

The bq2417x provides power path selector gate driver ACDRV/CMSRC on input NMOS pair ACFET (Q1) and RBFET (Q2), and BATDRV on a battery PMOS device (Q3). When the qualified adapter is present, the system is directly connected to the adapter. Otherwise, the system is connected to the battery. In addition, the power path prevents battery from boosting back to the input.

The bq2417x charges a battery from a DC source as high as 17 V, including a car battery. The input overvoltage limit is adjustable through the OVPSET pin. The AVCC, ACP, and ACN pins have a 30-V rating. When a high-voltage DC source is inserted, Q1 and Q2 remain off to avoid high voltage damage to the system.

For 1-cell applications, if the battery is not removable, the system can be directly connected to the battery to simplify the power path design and reduce the cost. With this configuration, the battery can automatically supplement the system load if the adapter is overloaded.

The bq2417x is available in a 24-pin, 5.5-mm × 3.5-mm thin VQFN package.

The bq2417x device is a highly integrated stand-alone Li-Ion and Li-Polymer switched-mode battery charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.

The device charges the battery in three phases: precondictioning, constant current, and constant voltage.

Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. The bq2417x automatically restarts the charge cycle if the battery voltage falls below an internal threshold, and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.

The bq2417x features Dynamic Power Management (DPM) to reduce the charge current when the input power limit is reached to avoid overloading the adapter. A highly accurate current-sense amplifier enables precise measurement of input current from adapter to monitor overall system power.

The bq2417x provides power path selector gate driver ACDRV/CMSRC on input NMOS pair ACFET (Q1) and RBFET (Q2), and BATDRV on a battery PMOS device (Q3). When the qualified adapter is present, the system is directly connected to the adapter. Otherwise, the system is connected to the battery. In addition, the power path prevents battery from boosting back to the input.

The bq2417x charges a battery from a DC source as high as 17 V, including a car battery. The input overvoltage limit is adjustable through the OVPSET pin. The AVCC, ACP, and ACN pins have a 30-V rating. When a high-voltage DC source is inserted, Q1 and Q2 remain off to avoid high voltage damage to the system.

For 1-cell applications, if the battery is not removable, the system can be directly connected to the battery to simplify the power path design and reduce the cost. With this configuration, the battery can automatically supplement the system load if the adapter is overloaded.

The bq2417x is available in a 24-pin, 5.5-mm × 3.5-mm thin VQFN package.

Download View video with transcript Video

Similar products you might be interested in

open-in-new Compare alternates
Same functionality with different pin-out to the compared device
BQ24171 ACTIVE Standalone 1-3 cell 4A synchronous Buck battery charger with JEITA compliance and Power Path This product supports adjustable cell voltage and JEITA temperature profile

Technical documentation

star =Top documentation for this product selected by TI
No results found. Please clear your search and try again.
View all 3
Type Title Date
* Data sheet bq2417x 1.6-MHz Synchronous Switched-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger With Integrated MOSFETs and Power Path Selector datasheet (Rev. C) PDF | HTML 30 Apr 2015
Application note BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers 31 Dec 2019
User guide bq24170EVM Evaluation Module 12 Nov 2010

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

BQ24170EVM-610-15V — Evaluation Module for BQ24170 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Battery Charger

The Texas Instruments BQ24170EVM-610-15V (-002) evaluation module helps designers evaluate the operation and performance of the bq24170 synchronous battery charger. The EVM is also called the HPA610 (-002). This EVM is optimized for a 12V or 15V input voltage and charges between 1 and 3 cell (...)

User guide: PDF
Not available on TI.com
Evaluation board

BQ24170EVM-610-5V — Evaluation Module for BQ24170 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Battery Charger

The Texas Instruments BQ24170EVM-610-5V (-001) evaluation module helps designers evaluate the operation and performance of the bq24170 synchronous battery charger. The EVM is also called the HPA610 (-001). This EVM is optimized for a 5V input voltage and charges a single cell 4.2V Li-ion battery. (...)

User guide: PDF
Not available on TI.com
Calculation tool

SLUC231 bq2417x Calculation Tool V1.0

Supported products & hardware

Supported products & hardware

Products
Battery charger ICs
BQ24170 Standalone 1-3 cell 4A synchronous Buck battery charger with Power Path selector BQ24172 Standalone 1-3 cell 4A synchronous Buck battery charger
Calculation tool

SLUC244 bqswitcherII calculation tools V1.2

Supported products & hardware

Supported products & hardware

Products
Battery charger ICs
BQ24130 Standalone 1-3 cell Buck battery charger for Li-ion and Super capacitor BQ24133 Standalone 1-3 cell 2.5A synchronous Buck battery charger with external Power Path BQ24170 Standalone 1-3 cell 4A synchronous Buck battery charger with Power Path selector BQ24171 Standalone 1-3 cell 4A synchronous Buck battery charger with JEITA compliance and Power Path BQ24172 Standalone 1-3 cell 4A synchronous Buck battery charger
Gerber file

HPA610 Gerber Files

SLUC236.ZIP (289 KB)
Reference designs

TIDA-00027 — 1.6MHz Synchronous Switch-Mode Li-Ion/Li-Polymer Stand-Alone Battery Charger Reference Design

This reference design is highly integrated stand-alone Li-ion and Li-polymer switch-mode battery charge solution with two integrated N-channel power MOSFETs and a power path selector gate driver. It offers a constant-frequency synchronous PWM controller with high accuracy regulation of input (...)
Test report: PDF
Reference designs

TIDA-00028 — 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-alone 4A Battery Charger Ref Design

This reference design is highly integrated stand-alone Li-ion and Li-polymer switch-mode battery charge solution with two integrated N-channel power MOSFETs and a power path selector gate driver. It offers a constant-frequency synchronous PWM controller with high accuracy regulation of input (...)
Test report: PDF
Schematic: PDF
Reference designs

TIDA-00026 — Programmable, Multi-Chemistry Fast Charge Management Reference Design

This reference design is a programmable, monolithic IC solution for fast-charge management of nickel cadmium (NiCd), nickel metal-hydride (NiMH), or lithium-ion (Li-Ion) batteries in single- or multi-chemistry applications. It chooses the proper battery chemistry (either nickel or lithium) and (...)
Test report: PDF
Schematic: PDF
Package Pins Download
VQFN (RGY) 24 View options

Ordering & quality

Information included:
  • RoHS
  • REACH
  • Device marking
  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
  • Material content
  • Qualification summary
  • Ongoing reliability monitoring
Information included:
  • Fab location
  • Assembly location

Recommended products may have parameters, evaluation modules or reference designs related to this TI product.

Support & training

TI E2E™ forums with technical support from TI engineers

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos