BQ25618E, BQ25619E
BQ25618E, BQ25619E
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SLUSEC9A – OCTOBER 2020 – REVISED MARCH 2021
SLUSEC9A – OCTOBER 2020 – REVISED MARCH 2021
BQ25618E, BQ25619E I2C Controlled 1-Cell 1.5-A Battery Chargers with 20-mA
Termination Current
1 Features
2 Applications
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High-efficiency, 1.5-MHz, synchronous Switch
Mode buck charger
– 95.5% charge efficiency at 0.5 A and 94.5%
efficiency at 1 A
– ±0.5% charge voltage regulation (10-mV step)
– I2C programmable JEITA profile of charge
voltage, current and temperature thresholds
– Low termination current with high accuracy 20
mA±10 mA
– Small inductor form factor of 2.5 x 2.0 x 1.0
mm3
Single input supporting USB input, high-voltage
adapter, or wireless power
– Support 4-V to 13.5-V input voltage range with
22-V absolute max input rating
– Programmable input current limit (IINDPM) with
I2C (100 mA to 3.2 A, 100-mA/step)
– Maximum power tracking by input voltage limit
(VINDPM) up to 5.4 V
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Earbuds (True Wireless or TWS) charging case
Consumer wearables, smartwatch
Personal care and fitness
Headsets/headphone
Hearing aids charging case
3 Description
The BQ25618E/619E integrates charge and voltage
protection in a single device. It offers low termination
current for switching chargers to charge wearable
devices to full battery capacity. The BQ25618E/
BQ25619E low quiescent current reduces battery
leakage down to 7 μA in Ship Mode, which conserves
battery energy to extend the shelf life for the device.
The BQ25619E is in a 4 mm x 4 mm QFN package for
easy layout. The BQ25618E is in a 2.0 mm x 2.4 mm
WCSP package for space-limited designs.
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Device Information
PART NUMBER
BQ25618E
PACKAGE(1)
BODY SIZE (NOM)
2.00 mm x 2.40 mm
4.00 mm × 4.00 mm
DSBGA (30)
WQFN (24)
– VINDPM threshold automatically tracks battery
voltage
BQ25619E
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Narrow voltage DC (NVDC) power path
management
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
– System instant-on with no battery or deeply
discharged battery
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Flexible I2C configuration and autonomous
charging for optimal system performance
High integration includes all MOSFETs, current
sensing and loop compensation
Low RDSON 19.5-mΩ BATFET to minimize
charging loss and extend battery run time
– BATFET control for Ship Mode, and full system
reset with and without adapter
Adapter
Or
Wireless RX
4V œ 13.5V
VBUS
SYS 3.5V-4.6V
SW
I2C Bus
Host
SYS
BAT
Host Control
ICHG
REGN
+
QON
Optional
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7-µA low battery leakage current in Ship Mode
9.5-µA low battery leakage current with system
standby
TS
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High accuracy battery charging profile
– ±6% charge current regulation
– ±7.5% input current regulation
– Remote battery sensing to charge faster
– Programmable top-off timer for full battery
charging
Simplified Application
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.
Product Folder Links: BQ25618E BQ25619E
Copyright © 2021 Texas Instruments Incorporated
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