PMIC - Battery Management

Part Number	Description / PDF	Quantity
BQ294512DRVR Texas Instruments	IC BATT PROT LI-ION 2-3CEL 6WSON	3000
BQ27421YZFR-G1D Texas Instruments	IC BATT FUEL GAUGE LI-ION 9DSBGA	0
BQ3060PWR Texas Instruments	IC GAS GAUGE LI-ION 2-4C 24TSSOP	1025
BQ24382DSGT Texas Instruments	IC BATT PROTECTION LI-ION 8WSON	840
BQ29412DCTRG4 Texas Instruments	IC BATT PROT LI-ION 2-4CELL SM8	0
BQ28550DRZT-R1 Texas Instruments	IC BATT GAS GAUGE LIION 12SON	0
BQ771801DPJT Texas Instruments	IC BATT PROT LI-ION 2-5CEL 8WSON	580
BQ7692003PWR Texas Instruments	IC BATT MON MULTI 3-5C 20TSSOP	0
BQ29330DBTG4 Texas Instruments	IC BATT PROT LI-ION 2-4C 30TSSOP	0
BQ24312DSGT Texas Instruments	IC BATT PROTECTION LI-ION 8WSON	750
BQ29717DSER Texas Instruments	IC BATT PROT LI-ION 1CELL 6WSON	0
BQ27411DRZT-G1A Texas Instruments	IC FUEL GAUGE LI-ION 1CELL 12SON	96
BQ7790508PW Texas Instruments	IC BATT PROT LI-ION 3-5C 20TSSOP	303
BQ27541DRZR Texas Instruments	IC BATT MFUNC LI-ION 1CEL 12VSON	146793
BQ26500PWRG4 Texas Instruments	IC FUEL GAUGE LI-ION 1CL 8TSSOP	0
BQ24316DSGR Texas Instruments	IC BATT PROTECTION LI-ION 8WSON	1930
BQ27500DRZR-V100 Texas Instruments	IC BATT MON LI-ION 1CELL 12VSON	18270
BQ27505YZGR-J4 Texas Instruments	IC BATT MON LI-ION 1CELL 12DSBGA	494822
BQ24314DSGR Texas Instruments	IC BATT PROTECTION LI-ION 8WSON	0
BQ76PL536PAPT Texas Instruments	IC BATT PWR SUPPLY MGMT CIRC	7750

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