# BQ25730RSNR (Component)
## Description
Charger IC Multi-Chemistry 32-QFN (4x4)
The BQ25730RSNR is a highly integrated synchronous buck battery charger and system power management IC developed by Texas Instruments for applications requiring efficient charging of multi-cell lithium-ion and lithium-polymer batteries. The device is optimized for USB Type-C, USB Power Delivery, industrial, and portable embedded systems where high charging efficiency, flexible power management, and compact implementation are required.
The charger integrates high-side and low-side MOSFET gate drivers along with advanced power path management features, enabling efficient battery charging while simultaneously powering the system load. The architecture supports NVDC power path operation, allowing stable system voltage regulation even when the battery is deeply discharged or absent.
The device supports a wide operating input voltage range and programmable charging parameters suitable for various battery chemistries and capacities. Integrated input current optimization and dynamic power management help maximize available adapter power while preventing overload conditions.
The BQ25730RSNR communicates with the host processor through an I²C interface, enabling software configuration, telemetry monitoring, and fault management. Internal ADC functionality provides real-time monitoring of charging voltage, current, temperature, and system operating conditions.
Its high integration level reduces external component count and PCB area, making it suitable for compact industrial and portable power applications.
Electrical Characteristics
Wide input voltage operating range compatible with USB PD adapters and industrial power sources.
Supports multi-cell lithium-ion and lithium-polymer battery charging configurations.
High-efficiency synchronous buck charging architecture.
Programmable charge current and charge voltage through digital control interface.
Integrated ADC for system telemetry and power monitoring.
Dynamic power management optimizes adapter utilization and system stability.
Low standby current operation for battery-powered systems.
Charging Features
Constant current and constant voltage charging modes.
Programmable input current limiting for USB and adapter compliance.
Battery preconditioning and charge termination functionality.
Support for fast charging operation with thermal regulation.
Power path management enables simultaneous battery charging and system operation.
Automatic recharge and battery maintenance functionality.
Protection Features
Input overvoltage protection.
Battery overvoltage and overcurrent protection.
Thermal regulation and thermal shutdown protection.
Short-circuit and fault condition protection.
Battery temperature monitoring support using external NTC thermistors.
Reverse current protection and adapter isolation.
Interface and Control
I²C serial communication interface for configuration and monitoring.
Programmable charging profiles and operating parameters.
Interrupt and status reporting capabilities.
Integrated telemetry reporting for voltage, current, and temperature measurements.
Autonomous operation capability with minimal host intervention.
Package Information
Package type is WQFN.
Compact thermally enhanced surface-mount package.
Optimized for automated PCB assembly and high-density layouts.
Applications
USB Type-C and USB Power Delivery systems.
Industrial portable electronics.
Embedded computing platforms.
Portable medical and instrumentation equipment.
Battery-powered industrial controllers.
Handheld terminals and data acquisition systems.
Portable consumer and commercial electronics.
#commonpartslibrary
#integratedcircuit
#powermanagement
#batterycharger
## Component Details
- **Owner:** adrian95
- **Created:** 5/19/2026
- **Last Updated:** 5/19/2026
- **Visibility:** Public
- **Datasheet URL:** https://www.ti.com/lit/ds/symlink/bq25730.pdf
- **Manufacturer Part Number:** BQ25730RSNR
- **Manufacturer Name:** Texas Instruments
- **Part Type:** Integrated Circuit
- **Package or Case Code:** 32-QFN
- **Symbol Style:** parametric-v1
## Distributor Pricing (qty 1)
*Pricing shown for quantity 1. For price breaks and other quantities, open in Flux.*
| Distributor | Unit Price (qty 1) | Stock |
|------------|--------------------|-------|
| [Arrow](https://www.arrow.com/en/products/bq25730rsnr/texas-instruments.html?utm_currency=USD®ion=nac) | N/A | N/A |
| [LCSC](https://www.lcsc.com/product-detail/C5219071.html) | $3.047 | 0 |
- **Part Type:** Integrated Circuits
- **Sub-Type:** Logic
- **Manufacturer:** Texas Instruments
- **MPN:** BQ25730RSNR
- **Mount Type:** Surface Mount
- **Package / Case Code:** 32-QFN
- **Pin Count:** 33
- **Logic Function:** AND
## Pins
| Pin | Name | Type |
|-----|------|------|
| 28 | REGN | |
| 22 | VSYS | |
| 30 | BTST1 | |
| 32 | SW1 | |
| 19 | SRN | |
| 23 | SW2 | |
| 3 | ACP | |
| 20 | SRP | |
| 1 | VBUS | |
| 2 | ACN | |
| 7 | VDDA | |
| 25 | BTST2 | |
| 6 | ILIM_HIZ | |
| 4 | CHRG_OK | |
| 21 | ~BATDRV | |
| 29 | LODRV1 | |
| 24 | HIDRV2 | |
| 18 | CELL_BATPRESZ | |
| 26 | LODRV2 | |
| 31 | HIDRV1 | |
| 11 | ~PROCHOT | |
| 5 | OTG/VAP/FRS | |
| 8 | IADPT | |
| 14 | CMPIN | |
| 10 | PSYS | |
| 16 | COMP1 | |
| 15 | CMPOUT | |
| 17 | COMP2 | |
| 9 | IBAT | |
| 13 | SCL | |
| 12 | SDA | |
| 27 | PGND | |
| 33 | EP | |
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