Part: BQ24072, BQ24073, BQ24074, BQ24075, BQ24079 from Texas Instruments

Type: Standalone 1-Cell Linear Battery Charger with Power Path

Description: The BQ2407x series are integrated Li-Ion linear chargers and system power path management devices that support charge currents up to 1.5 A, operate from USB or AC adapters with 28-V input rating, and feature dynamic power path management.

Operating Conditions:

• Supply voltage: 4.25 V to 10 V (VIN)
• Operating temperature: -40 °C to +125 °C (TJ)
• Max charge current: Up to 1.5 A
• Selectable input current limit: 100 mA, 500 mA, or programmable up to 1.5 A

Absolute Maximum Ratings:

• Max supply voltage: 28 V (VIN)
• Max junction/storage temperature: -65 °C to +150 °C (TJ, TSTG)

Key Specs:

• Input voltage range: 4.25 V to 10 V
• Maximum charge current: Up to 1.5 A
• USB input current limit: 100 mA and 500 mA selectable
• Input overvoltage protection: 28 V rating
• Battery fast charge current range: 100 mA to 1.5 A
• Battery regulation voltage: 4.2 V (typical)
• Termination current (BQ24074): Programmable
• Quiescent current (Power Down): I BAT(PDWN) TYP value added in revision N.

Features:

• Fully compliant USB charger
• Selectable 100-mA and 500-mA maximum input current
• Input-based dynamic power management (VINDPM)
• 28-V Input rating with overvoltage protection
• Integrated dynamic power path management (DPPM)
• Supports up to 1.5-A charge current with current monitoring output (ISET)
• Programmable input current limit up to 1.5 A for wall adapters
• System output tracks battery voltage (BQ24072)
• Programmable termination current (BQ24074)
• Battery disconnect function with SYSOFF input (BQ24075, BQ24079)
• Programmable pre-charge and fast-charge safety timers
• Reverse current, short-circuit and thermal protection
• NTC thermistor input
• Proprietary start-up sequence limits inrush current
• Status indication - charging/done, power good
• Functional Safety-Capable (BQ24074)
• IEC 62368-1 Certification (BQ24072)

Applications:

• TWS Charging case and headphones
• Gaming accessory
• Video doorbells, IP network cameras
• Asset tracking and fleet management
• Portable medical devices

Package:

• VQFN (16) 3.00 mm × 3.00 mm

• Fully compliant USB charger
• -Selectable 100-mA and 500-mA maximum input current
• -100-mA Maximum current limit ensures compliance to USB-IF standard
• -Input-based dynamic power management (VINDPM) for protection against poor USB sources
• Functional Safety-Capable (BQ24074)
• -Documentation available to aid functional safety system design
• 28-V Input rating with overvoltage protection
• Integrated dynamic power path management (DPPM) function simultaneously and independently powers the system and charges the battery
• Supports up to 1.5-A charge current with current monitoring output (ISET)
• Programmable input current limit up to 1.5 A for wall adapters
• System output tracks battery voltage (BQ24072)
• Programmable termination current (BQ24074)
• Battery disconnect function with SYSOFF input (BQ24075, BQ24079)
• Programmable pre-charge and fast-charge safety timers
• Reverse current, short-circuit and thermal protection
• NTC thermistor input
• Proprietary start-up sequence limits inrush current
• Status indication - charging/done, power good
• Safety-Related Certification:
• -IEC 62368-1 Certification (BQ24072)

• TWS Charging case and headphones
• Gaming accessory
• Video doorbells, IP network cameras
• Asset tracking and fleet management
• Portable medical devices

BQ24075RGTR — 16-VFQFN Exposed Pad

Notes

• BQ24075RGTR specific: This pinout is for the BQ24075 variant (RGT0016C package). The BQ24075 includes the SYSOFF pin (pin 15), which is unique to this variant and the BQ24079. The BQ24072/BQ24073 and BQ24074 variants have different pin assignments for pins 15–16.
• Dual BAT pins: Pins 2 and 3 are both labeled BAT and should be connected together to the battery positive terminal.
• Dual OUT pins: Pins 10 and 11 are both labeled OUT and should be connected together to the system load.
• Exposed thermal pad: Must be soldered to ground plane; internally connected to VSS.
• Pull-down/pull-up resistors: CE, EN1, EN2 are pulled down internally; SYSOFF is pulled up internally. Do not leave these pins unconnected.

Over junction temperature range (0° ≤ TJ ≤ 125°C) and the recommended supply voltage range (unless otherwise noted)

www.ti.com

over the 0°C to 125°C operating free-air temperature range (unless otherwise noted)

The BQ2407x devices power the system while simultaneously and independently charging the battery. The input power source for charging the battery and running the system can be an AC adapter or a USB port. The devices feature dynamic power-path management (DPPM), which shares the source current between the system and battery charging and automatically reduces the charging current if the system load increases. When charging from a USB port, the input dynamic power management (VIN-DPM) circuit reduces the input current limit if the input voltage falls below a threshold, preventing the USB port from crashing. The power-path architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents.

The BQ2407x is configurable to be host controlled for selecting different input current limits based on the input source connected, or a fully stand alone device for applications that do not support multiple types of input sources.