PMIC - Battery Management

Part Number	Description / PDF	Quantity
BQ2019PWG4 Texas Instruments	IC BAT MON MULT-CHEM 1-3C 8TSSOP	0
BQ27411DRZT-G1C Texas Instruments	IC FUEL GAUGE LI-ION 1CELL 12SON	18
UCC3958DP-4 Texas Instruments	IC BATT PROTECTION LI-ION 16SOIC	60
TPS65023RSBR Texas Instruments	IC BAT PWR MGMT LI-ION 1C 40WQFN	0
BQ2028YZGR Texas Instruments	IC BATT MFUNC 1CELL 12DSBGA	74970
BQ294703DSGT Texas Instruments	IC BATT PROT LI-ION 2-4CEL 8WSON	986
BQ294504DRVR Texas Instruments	IC BATT PROT LI-ION 2-3CEL 6WSON	543019
BQ78PL114RGZR Texas Instruments	IC BATT MON LI-ION 3-8CEL 48VQFN	1431
BQ296228DSGT Texas Instruments	IC BATT PROT LI-ION 2-4CEL 8WSON	250
BQ7693003DBT Texas Instruments	IC BATT MON MULTI 6-10C 30TSSOP	0
BQ294711DSGR Texas Instruments	IC BATT PROT LI-ION 2-4CEL 8WSON	4403
BQ78412DDWR Texas Instruments	IC BAT MON LEAD ACID 1C 44HTSSOP	15561
BQ7790400PW Texas Instruments	IC BATT PROT LI-ION 3-4C 20TSSOP	473
BQ2060SS-E207TR-EP Texas Instruments	IC SBS-COMPL GAS GAUGE 28-QSOP	0
BQ20Z70PW-V150 Texas Instruments	IC BATT MON LI-ION 2-4CL 20TSSOP	9285
BQ24300DSGR Texas Instruments	IC BATT PROTECTION LI-ION 8WSON	267000
BQ296226DSGR Texas Instruments	IC BATT PROT LI-ION 2-4CEL 8WSON	2998
BQ294705DSGT Texas Instruments	IC BATT PROT LI-ION 2-4CEL 8WSON	1000
BQ20Z40PW Texas Instruments	IC BATT PWR SUP MGMT CIRC	7568
BQ76PL102RGTR Texas Instruments	IC BATT MFUNC LI-ION 1-2CL 16QFN	1281

PMIC - Battery Management

1. Overview

Power Management Integrated Circuits (PMICs) with Battery Management functionality are specialized semiconductor devices designed to monitor, control, and optimize battery operations in electronic systems. These ICs handle critical tasks including charging control, discharge regulation, capacity monitoring, and safety protection. Their importance has grown exponentially with the proliferation of portable electronics, electric vehicles, and energy-harvesting systems, where battery efficiency and safety are paramount.

2. Major Types & Functional Classification

Type	Functional Features	Application Examples
Battery Charge Management ICs	Support Li-ion/Polymer, NiMH, and lead-acid chemistries; implement CC/CV charging, thermal regulation	Smartphones, power banks
Fuel Gauge ICs	Impedance tracking, voltage-based SOC estimation, data logging	Laptops, medical devices
Battery Protection ICs	Overvoltage, overcurrent, short-circuit, and temperature protection	E-bikes, battery packs
Power Path Management ICs	Dynamic power distribution between charger and system load	Tablets, drones

3. Structure & Composition

A typical PMIC Battery Management IC integrates:

Analog Front-End (AFE) with precision ADC/DAC
Digital control logic (state machines or embedded microcontrollers)
Communication interfaces (I2C, SMBus, SPI)
High-side/low-side MOSFET drivers
Temperature sensing elements
Non-volatile memory for calibration data

Advanced packages (QFN, BGA) enable high integration while maintaining thermal performance.

4. Key Technical Specifications

Parameter	Typical Range	Importance
Charging Current Range	100mA - 5A	Determines charge speed and battery size compatibility
SOC Estimation Accuracy	1-5%	Impacts runtime prediction reliability
Quiescent Current	1-20 A	Crucial for standby power efficiency
Communication Speed	400kHz - 3.4MHz (I2C)	Affects system responsiveness
Operating Temperature	-40 C to +125 C	Determines environmental robustness

5. Application Fields

Consumer Electronics: Smartphones (Apple iPhone PMICs), Smartwatches (Fitbit Charge series)
Medical Devices: Portable ultrasound machines (Philips Lumify), infusion pumps
Automotive: EV battery packs (Tesla Model 3 BMS), start-stop systems
Industrial: Robotics (Boston Dynamics Atlas), energy storage systems

6. Leading Manufacturers & Products

Manufacturer	Representative Product	Key Features
Texas Instruments	BQ25790	Single-chip solution with USB PD 3.0, 3.5A charging
Analog Devices	MAX17055	ModelGauge m3 algorithm, 60s runtime prediction
STMicroelectronics	STM32F051x	Cortex-M0 core with integrated Li-ion charger
NXP Semiconductors	PF1550	PMIC for i.MX8 processors with dynamic voltage scaling

7. Selection Guidelines

Key considerations:

Battery chemistry compatibility (Li-ion requires CC/CV profile)
System voltage requirements (USB PD needs 5-20V support)
Form factor constraints (Wearable devices demand WCSP packages)
Communication protocol compatibility (I2C vs. SMBus vs. HDQ)
Safety certifications (UL 1642 for lithium batteries)
Software ecosystem (development tools and reference designs)

Example: For a 2-cell Li-ion notebook battery, select a multi-cell fuel gauge (e.g., BQ30z55) with SHA-256 authentication and PC companion software support.

8. Industry Trends

Integration of wireless charging (Qi standard) with battery management
Adoption of AI algorithms for adaptive charging profiles
Development of ultra-low-power PMICs for IoT edge devices
Increase in ASIL-D rated automotive-grade PMICs for EVs
Transition to 3D packaging for higher functional density
Growing adoption of battery health analysis (BHA) algorithms