PMIC - Battery Chargers

Part Number	Description / PDF	Quantity
BQ24157SYFFT Texas Instruments	IC BATT CHG LI-ION 1CELL 20DSBGA	203
BQ24620RVAT Texas Instruments	IC BAT CHG IRON PHOS 1-7C 16VQFN	821
MCP73842T-840I/UN Roving Networks / Microchip Technology	IC BAT CNTRL LI-ION 1-2CL 10MSOP	1710
ISL95538BIRTZ Intersil (Renesas Electronics America)	IC BATT CHG LI-ION 1-4CEL 32TQFN	0
RT9471GQW(2) Richtek	IC BATT CHG LI-ION 1CELL 24WQFN	0
DS2712E+ Maxim Integrated	IC BAT CHG MULTCHEM 1-2C 16TSSOP	2763840
MAX1925ETC+T Maxim Integrated	IC BATT CHG LI-ION 1CELL 12TQFN	0
BQ24032ARHLTG4 Texas Instruments	IC BATT CHG LI-ION 1CELL 20VQFN	0
BQ24296MRGER Texas Instruments	IC BATT CHG LI-ION 1CELL 24VQFN	5644
MAX1772EEI+ Maxim Integrated	IC BAT CHG MULTCHEM 2-4CL 28QSOP	10750
BD8665GW-E2 ROHM Semiconductor	IC BATT CHG LI-ION UCSP75M2	4268
LTM8061IV-8.2#PBF Analog Devices, Inc.	IC BATT CHG LI-ION 2CELL 77LGA	170
FAN54005UCX Sanyo Semiconductor/ON Semiconductor	IC BATT CHG LI-ION 1CELL 20WLCSP	3731
BQ25708RSNR Texas Instruments	IC BAT CHG MULTCHEM 1-4CL 32WQFN	1566
BQ24257RGET Texas Instruments	IC BAT CHG MULT-CHEM 1CEL 24VQFN	6
MAX8844YETD+T Analog Devices, Inc.	IC BATT CHG LI-ION 1CELL 14TDFN	7500
MAX1645AEEI Analog Devices, Inc.	IC BAT CHG MULTCHEM 1-4CL 28QSOP	7900
LTC4008EGN#PBF Analog Devices, Inc.	IC BATT CHG MULTI-CHEM 20SSOP	0
BQ24745RHDRG4 Texas Instruments	IC BAT CHG MULTCHEM 2-4CL 28VQFN	0
LTC4155IUFD#TRPBF Analog Devices, Inc.	IC BATT CHG LI-ION 1CELL 28QFN	0

PMIC - Battery Chargers

1. Overview

Power Management Integrated Circuits (PMIC) with Battery Charger functionality are specialized semiconductor devices that manage power distribution and battery charging processes in electronic systems. These ICs integrate charging algorithms, safety protections, and power path management to optimize energy efficiency and battery lifespan. Their importance in modern technology lies in enabling compact, high-efficiency power solutions for portable electronics, electric vehicles, and IoT devices.

2. Main Types and Functional Classification

Type	Functional Characteristics	Application Examples
Linear Battery Chargers	Simple topology, low noise, limited efficiency (typically <70%)	Wearable devices, low-power sensors
Switch-Mode Battery Chargers	High efficiency (>90%), supports fast charging protocols	Smartphones, laptops, drones
Multi-Protocol Chargers	Supports USB PD, QC, and proprietary fast charging standards	Universal adapters, power banks
Wireless Battery Chargers	Integrates magnetic induction control and foreign object detection	Smartphones, electric toothbrushes

3. Structure and Components

Typical physical structure includes:

QFN/DFN package (3x3mm to 5x5mm size range)
Internal modules:
- Voltage/current regulation circuits
- Charging algorithm controller (CC-CV, pulsed charging)
- Thermal management unit
- Power MOSFETs (for switch-mode types)
- Communication interface (I2C/SPI for parameter configuration)

4. Key Technical Specifications

Parameter	Typical Range	Importance
Charging Current	100mA-5A	Determines charge time and battery capacity
Voltage Accuracy	0.5%- 2%	Ensures battery longevity and safety
Conversion Efficiency	70%-95%	Impacts thermal performance and battery life
Input Voltage Range	3.7V-24V	Defines compatibility with power sources
Protection Features	OVP/OCP/OTP	Prevents system failures and safety hazards

5. Application Fields

Consumer Electronics: smartphones, tablets, TWS earbuds
Industrial: handheld terminals, robotics, medical devices
Automotive: infotainment systems, battery management for EVs
IoT: smart meters, environmental sensors, security systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Texas Instruments	BQ25790	4.5A switch-mode charger with USB PD 3.0 support
Analog Devices	LTC4162	High-voltage battery charger with MPPT algorithm
STMicroelectronics	STBC08	Automotive-grade linear charger with ASIL-B safety rating
NXP Semiconductors	PF1550	PMIC with integrated wireless charging controller

7. Selection Guidelines

Match charging current/voltage requirements with battery specifications
Consider input power source compatibility (USB, AC adapter, solar)
Evaluate required protection features (temperature monitoring, fault reporting)
Check communication interface requirements (I2C register configuration needed?)
Thermal considerations: select package with adequate heat dissipation
Example: For a 10W IoT device, select a 1A linear charger with 1% voltage accuracy

8. Industry Development Trends

Key trends include:

Integration of AI-based charging algorithms for battery aging compensation
Adoption of GaN/SiC transistors for >95% efficiency in fast charging applications
Development of bidirectional chargers for vehicle-to-grid (V2G) applications
Standardization of USB-C Power Delivery as universal charging interface
Miniaturization through 3D packaging technology (stacked die integration)