Pin Function Grouping Assistance

1:56

Thought for 2 sec

1/4 Inspect current BQ25730 terminal group properties

Thought for 2 sec

Read schematic.

Thought for 3 sec

2/4 Replace detailed pin groups with broader functional categories

Thought for 11 sec

Thought for 4 sec

3/4 Update the pin-group project document to match the broader categories

Thought for 19 sec

Thought for 4 sec

4/4 Verify all terminals still have one group each

Read 1 knowledge entry.

Thought for 7 sec

Read schematic.

Thought for 3 sec

4/4 tasks completed.

Thought for a moment

Done — I generalized the terminal groups to broad categories: Power, Ground, Control, Analog, and I2C.

I verified all 33 terminals still have exactly one functional group, and updated the BQ25730RSNR Pin Functional Groups project file to match.

adrian95

Add a Section property to all pins, and apply the same value used in the Pin Group property to each pin's Section property.

flux

0:11

Thought for a moment

I’ll copy each terminal’s current Pin Group value into its Section property, then verify all 33 terminals were updated consistently.

flux

1:27

Thought for 4 sec

1/3 Read current Pin Group values for all 33 terminals

Thought for 3 sec

Read schematic.

Thought for 3 sec

2/3 Set Section property equal to Pin Group for all terminals

Thought for 8 sec

Thought for 5 sec

3/3 Verify Section values match Pin Group values

Thought for 6 sec

Read schematic.

Thought for 5 sec

3/3 tasks completed.

Thought for a moment

Done — I added the Section property to all 33 terminals and set each one to match its current Pin Group value.

Verified examples:

Power pins: Pin Group = Power, Section = Power
Ground pins: Pin Group = Ground, Section = Ground
Control pins: Pin Group = Control, Section = Control
Analog pins: Pin Group = Analog, Section = Analog
I2C pins: Pin Group = I2C, Section = I2C

Run ERC check

Find mismatches

Document convention

Check VBUS pins

Finished working

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BQ25730RSNR Pin Functional Groups

Datasheet source used: TI BQ25730, Table 6-1 Pin Functions and Figure 6-1 RSN Package 32-pin WQFN.

Each physical pin is assigned to exactly one broad functional group. The exposed pad is included as pin 33 in the Flux terminal set.

Broad groups used

Power: input power, internal regulator output, power-stage switching/bootstrap nodes, and current-sense power pins.
Ground: power ground and exposed thermal pad.
Control: gate-drive outputs, mode/configuration pins, current-limit control, and open-drain status/control outputs.
Analog: monitor outputs, compensation pins, and comparator pins.
I2C: digital host communication pins.

Table

Pin	Terminal	General group	Pin type	Datasheet-grounded function
1	VBUS	Power	Power In	Charger input voltage; input low-pass filter recommended.
2	ACN	Power	Power In	Input current sense amplifier negative input.
3	ACP	Power	Power In	Input current sense amplifier positive input.
4	CHRG_OK	Control	Open Collector	Open-drain active-high good power-source indicator.
5	OTG/VAP/FRS	Control	Input	Active-high OTG/VAP/FRS mode enable.
6	ILIM_HIZ	Control	Input	Input current limit and HIZ analog control.
7	VDDA	Power	Power In	Internal reference bias, supplied from REGN through 10 ohm.
8	IADPT	Analog	Output	Adapter current monitor and inductance-programming pin.
9	IBAT	Analog	Output	Battery charge/discharge current monitor output.
10	PSYS	Analog	Output	Current-mode system power monitor output.
11	~PROCHOT	Control	Open Collector	Active-low open-drain PROCHOT event indicator.
12	SDA	I2C	Bi-Directional	I2C open-drain data I/O.
13	SCL	I2C	Input	I2C clock input.
14	CMPIN	Analog	Input	Independent comparator input.
15	CMPOUT	Analog	Open Collector	Independent comparator open-drain output.
16	COMP1	Analog	Input	Buck-boost compensation pin 1.
17	COMP2	Analog	Input	Buck-boost compensation pin 2.
18	CELL_BATPRESZ	Control	Input	Battery cell selection and battery-present input.
19	SRN	Power	Power In	Charge current sense negative input and battery voltage sense.
20	SRP	Power	Power In	Charge current sense positive input.
21	~BATDRV	Control	Output	P-channel BATFET gate driver output.
22	VSYS	Power	Power In	System voltage sensing for VSYS regulation.
23	SW2	Power	Power In	Boost-mode switching node.
24	HIDRV2	Control	Output	Boost high-side MOSFET gate driver.
25	BTST2	Power	Power In	Boost high-side bootstrap supply.
26	LODRV2	Control	Output	Boost low-side MOSFET gate driver.
27	PGND	Ground	Ground	Device power ground.
28	REGN	Power	Power Out	6V linear regulator output for gate drive.
29	LODRV1	Control	Output	Buck low-side MOSFET gate driver.
30	BTST1	Power	Power In	Buck high-side bootstrap supply.
31	HIDRV1	Control	Output	Buck high-side MOSFET gate driver.
32	SW1	Power	Power In	Buck-mode switching node.
33	EP	Ground	Ground	Exposed thermal pad; solder to board and connect to power ground planes.

Notes

No pin is repeated across groups.
The broad Pin Group values have been written into the terminal properties.
Pin Type and Pin Description remain datasheet-specific for accuracy.

Broad groups used

Notes

Reviews

Documents

BQ25730RSNR Pin Functional Groups

Assets

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BQ25730RSNR

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Project Name

BQ25730RSNR

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

Properties

Manufac… Number

BQ25730RSNR

Manufac…er Name

Texas Instruments

Part Type

Integrated Circuit

Datasheet URL

ti.com/lit/ds/symlink/bq25730.pdf

Designator Prefix

Package …se Code

32-QFN

Symbol Style

parametric-v1

Pricing & Availability

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