PMIC - Battery Management

Part Number	Description / PDF	Quantity
BQ294502DRVR Texas Instruments	IC BATT PROT LI-ION 2-3CEL 6WSON	1870
BQ27541DRZR-V200 Texas Instruments	BQ27541-V200 SINGLE CELL LI-ION	224
BQ33100PW Texas Instruments	IC BATT SUPERCAP 2-5C 24TSSOP	70
BQ771823DPJR Texas Instruments	IC BATT PROT LI-ION 2-5CEL 8WSON	2980
TPS650231RSBT Texas Instruments	IC BAT PWR MGMT LI-ION 1C 40WQFN	2225
BQ29411DCTT Texas Instruments	IC BATT PROT LI-ION 2-4CELL SM8	600
BQ29704DSET Texas Instruments	IC BATT PROT LI-ION 1CELL 6WSON	1205
BQ2084DBT-V143G4 Texas Instruments	IC GAS GAUGE FOR BQ29312 38TSSOP	0
BQ771818DPJR Texas Instruments	IC BATT PROT LI-ION 2-5CEL 8WSON	2800
BQ294604DRVT Texas Instruments	IC BATT PROT LI-ION 1CELL 6WSON	102897
BQ29310PW Texas Instruments	IC BATTERY MANAGEMANT 24TSSOP	1620
BQ25700ARSNT Texas Instruments	IC BATT MON MULT-CHEM 1-4C 32QFN	603
BQ24773RUYR Texas Instruments	IC BATT MFUNC MULTI-CHEM 28WQFN	5859
TPS650240RHBT Texas Instruments	IC BAT PWR MGMT LI-ION 1C 32VQFN	1000
BQ7791501PWR Texas Instruments	IC BATT PROT LI-ION 3-5C 24TSSOP	3157
BQ2016DBQ Texas Instruments	IC BATT PWR SUPPLY SUPPORT CIRC	24120
BQ771808DPJT Texas Instruments	IC BATT PROT LI-ION 2-5CEL 8WSON	735
BQ29413PWR Texas Instruments	IC BATT PROT LI-ION 2-4CL 8TSSOP	0
BQ28Z610DRZT Texas Instruments	IC FUEL GAUGE LI-ION 1-2CL 12SON	0
BQ78350DBT-R1A Texas Instruments	IC BATT MON LI-ION 3-15C 30TSSOP	280

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