BQ25620, BQ25622
SLUSEG2A – SEPTEMBER 2022 – REVISED OCTOBER 2022
BQ25620/BQ25622 I2C Controlled, 3.5-A, Maximum 18-V Input, Charger with NVDC
Power Path Management and OTG Output
•
•
IP Camera, EPOS
Portable Medical Equipment
1 Features
•
High-efficiency, 1.5-MHz, synchronous switching
mode buck charger for single cell battery
– >90% efficiency down to 25-mA output current
from 5-V input
– Charge termination from 10 mA to 620 mA, 10-
mA steps
– Flexible JEITA profile for safe charging over
temperature
BATFET control to support shutdown, ship mode
and full system reset
– 1.5-μA quiescent current in battery only mode
– 0.15-μA battery leakage current in ship mode
– 0.1-μA battery leakage current in shutdown
Supports USB On-The-Go (OTG)
– Boost mode operation supporting 3.84-V to 9.6-
V output
– >90% boost efficiency down to 100-mA OTG
current for 5-V VBUS
Supports a wide range of input sources
3 Description
The BQ25620 and BQ25622 are highly-integrated
3.5-A switch-mode battery charge management and
system power path management devices for single
cell Li-Ion and Li-polymer batteries. The solution is
highly integrated with built-in current sensing, loop
compensation, input reverse-blocking FET (RBFET,
Q1), high-side switching FET (HSFET, Q2), low-
side switching FET (LSFET, Q3), and battery FET
(BATFET, Q4) between system and battery. The
devices use narrow VDC power path management,
regulating the system slightly above the battery
•
•
•
voltage without dropping below
a
configurable
minimum system voltage. The low impedance power
path optimizes switch-mode operation efficiency,
reduces battery charging time, extends battery life
during discharging phase, and the ultra-low 0.15-μA
ship mode current extends battery shelf life. The I2C
serial interface with charging and system settings
makes the BQ25620 and BQ25622 truly flexible
solutions.
– 3.9-V to 18-V wide input operating voltage
range with 26-V absolute maximum input
voltage
– Maximizes source power with input voltage
regulation (VINDPM) and input current
regulation (IINDPM)
– VINDPM threshold automatically tracks battery
voltage
Device Information
PART NUMBER
BQ25620
BQ25622
PACKAGE(1)
BODY SIZE (NOM)
2.50 mm × 3.00 mm
2.50 mm × 3.00 mm
WQFN (18)
WQFN (18)
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
•
•
Efficient battery operation with 15-mΩ BATFET
Narrow VDC (NVDC) power path management
System
1 uH
– System instant-on with depleted or no battery
– Battery supplement when adapter is fully
loaded
Load
3.4 - 18V
VBUS
SW
USB
Detection
USB
D+/D- (620)
•
•
Flexible autonomous or I2C-controlled modes
Integrated 12-bit ADC for voltage, current,
temperature monitoring
BTST
SYS
TS_BIAS (622)
ILIM (622)
2.6 – 4.85V
REGN (620)
TS_BIAS (622)
REGN
•
High accuracy
I2C Bus
PG
BQ25620
BQ25622
– ±0.5% charge voltage regulation
– ±5% charge current regulation
– ±5% input current regulation
Safety
Host
CE
TS
BAT
•
1.8 – 4.8V
QON
– Thermal regulation and thermal shutdown
– Input, system, battery overvoltage protection
– Battery, converter overcurrent protection
– Charging safety timer
GND
Optional
2 Applications
BQ25620/2 Simplified Application Diagram
•
•
Tablet
Gaming and Computer Accessories
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.