Part Information Audit and Review

Worked for 6 mins 11 sec

Completed the BQ24074RGTT part audit and updated the project with the official TI datasheet URL: https://www.ti.com/lit/ds/symlink/bq24074.pdf.

Summary: the symbol pin names/numbers and 16-VQFN footprint with exposed pad match the TI datasheet. The main issue found is metadata quality: terminal pin types and detailed pin descriptions are currently unspecified/incomplete, so ERC usefulness is reduced.

Full review is saved in BQ24074RGTT Part Review.

adrian95

Fix the terminal pin types and descriptions from the TI datasheet.

Thought for 18 sec

flux

I’ll update each terminal with datasheet-derived electrical pin type and functional description, then verify the terminal metadata afterward.

Worked for 1 min 30 sec

flux

Fixed the BQ24074RGTT terminal metadata from the TI datasheet.

Updated all 17 terminals with datasheet-derived Pin Type and Pin Description, including standard pin types for IN, OUT, BAT, VSS, EP, open-drain status outputs, and programming/control pins. Verification passed, and the terminal-related part review checks returned no reported issues.

adrian95

Please also convert the symbol to parametric style,and place each pin into the correct section based on the datasheet.

Thought for 10 sec

flux

I’ll switch the symbol metadata to parametric style, assign each terminal to datasheet-based functional sections, and verify the resulting symbol properties.

Worked for 2 mins

flux

Updated the symbol metadata to Parametric style.

I assigned each pin to a datasheet-based section and orientation: power-path pins to Power, VSS/EP to Ground, TS to Analog, and control/programming/status pins to Control. I also set terminal order by datasheet pin number and verified the updates; terminal/parametric review checks returned no reported issues.

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Pins

Symbol

Layout

Preview

BAT

~{CHG}

~{CE}

OUT

EN1

VSS

ILIM

ITERM

BAT

~{PGOOD}

EN2

OUT

ISET

TMR

BQ24074RGTT Part Review

Source

Official datasheet: https://www.ti.com/lit/ds/symlink/bq24074.pdf
Manufacturer: Texas Instruments
MPN: BQ24074RGTT
Function: Standalone 1-cell Li-Ion/Li-Polymer 1.5 A linear battery charger with power-path management.

Project Metadata Reviewed / Updated

The project was updated with the official TI datasheet URL and key metadata:

Manufacturer Name: Texas Instruments
Manufacturer Part Number: BQ24074RGTT
Datasheet URL: https://www.ti.com/lit/ds/symlink/bq24074.pdf
Package: VQFN-16 RGT, 3 mm x 3 mm, exposed thermal pad
Operating temperature: -40 C to 85 C orderable-device range

Key Datasheet Specs

Table

Parameter	Datasheet value
Cell chemistry	1-cell Li-Ion / Li-Polymer
Battery regulation voltage	4.2 V
OUT regulation, BQ24074	4.4 V typ
Input operating range, BQ24074	4.35 V to 10.2 V
Recommended IN voltage range / withstand	4.35 V to 26 V recommended range; abs max 28 V
Input OVP threshold, BQ24074	10.5 V typ
IN current limit	100 mA, 500 mA, or resistor-programmed 200 mA to 1.5 A
Fast-charge current	Programmable up to 1.5 A
OUT current	4.5 A recommended operating, 5 A abs max continuous
BAT discharge current	4.5 A recommended operating, 5 A abs max
Package	RGT VQFN-16 with exposed thermal pad
Orderable package quantity	RGTT = 250 units/reel
Device marking	BZF or NXK
MSL / finish	Level-2-260C-1YEAR, NiPdAu, RoHS/Green

Datasheet Pinout vs Project Symbol

Table

Pin	Datasheet name	Function summary	Project symbol name	Match
1	TS	NTC thermistor input; use 10 k fixed resistor to VSS if unused	TS	Yes
2	BAT	Battery output/sense; bypass to VSS with 4.7 uF to 47 uF	BAT	Yes
3	BAT	Battery output/sense; bypass to VSS with 4.7 uF to 47 uF	BAT	Yes
4	CE	Active-low charge enable; internal pulldown, do not leave floating	~CE	Yes
5	EN2	Input current limit select; internal pulldown, do not leave floating	EN2	Yes
6	EN1	Input current limit select; internal pulldown, do not leave floating	EN1	Yes
7	PGOOD	Open-drain power-good output	~PGOOD	Yes
8	VSS	Ground; connect to thermal pad and ground rail	VSS	Yes
9	CHG	Open-drain charging status output	~CHG	Yes
10	OUT	System supply output; bypass to VSS with 4.7 uF to 47 uF	OUT	Yes
11	OUT	System supply output; bypass to VSS with 4.7 uF to 47 uF	OUT	Yes
12	ILIM	Input current programming resistor 1.1 k to 8 k to VSS	ILIM	Yes
13	IN	DC input; bypass to VSS with 1 uF to 10 uF	IN	Yes
14	TMR	Safety timer programming; 18 k to 72 k to VSS, VSS disables, float default	TMR	Yes
15	ITERM	Termination current programming, BQ24074 option	ITERM	Yes
16	ISET	Fast-charge current programming resistor 590 ohm to 8.9 k to VSS	ISET	Yes
17	Thermal Pad	Internally connected to VSS; must connect to VSS, not primary ground input	EP	Yes

Footprint Cross-Check

Project footprint asset: VQFN-16_L3.0-W3.0-P0.50-TL-EP1.7.

Observed footprint details:

16 perimeter SMD pads on 0.50 mm pitch.
Body nominal 3.0 mm x 3.0 mm.
Exposed pad pad 17, 1.70 mm x 1.70 mm.
Pin-1 marker present near the pin-1 corner.
Pad numbering orientation matches the datasheet top-view convention: pins 1-4 on left side, 5-8 along bottom, 9-12 on right side, 13-16 along top, and exposed pad 17 in the center.

Status Output / Control Notes

CHG and PGOOD are open-drain outputs and require pull-up resistors or LED pull-up paths in an application schematic.
EN1 and EN2 select input current limit:
- EN2=0, EN1=0: USB100, 100 mA max input current.
- EN2=0, EN1=1: USB500, 500 mA max input current.
- EN2=1, EN1=0: resistor-programmed ILIM.
- EN2=1, EN1=1: standby / USB suspend.
CE is active low; high disables charging while OUT remains active and supplement mode remains available.

Required External Components in an Application

The part symbol and footprint are library primitives, not a complete charger application. Designs using this part should include:

IN bypass capacitor: 1 uF to 10 uF from IN to VSS.
BAT bypass capacitor: 4.7 uF to 47 uF from BAT to VSS.
OUT bypass capacitor: 4.7 uF to 47 uF from OUT to VSS.
ISET resistor to VSS, 590 ohm to 8.9 k, otherwise charging is disabled.
ILIM resistor to VSS, 1.1 k to 8 k when using EN2=1 / EN1=0; leaving ILIM open disables all charging.
TS connection to 10 k NTC in the battery pack, or 10 k fixed resistor from TS to VSS if unused.
Pull-ups or LED paths for CHG and PGOOD if status indication is used.
VSS and EP both connected to board ground, with adequate copper/thermal vias for heat spreading.

Mismatches / Issues Found

No symbol pin-number mismatch found. All 17 project terminals match the BQ24074 RGT datasheet pin names and numbers.
No footprint pad-count mismatch found. The footprint has 16 perimeter pads plus exposed pad 17, matching the datasheet package.
No footprint package-size mismatch found. The footprint is a 3 mm x 3 mm, 0.50 mm pitch VQFN with 1.7 mm exposed pad, consistent with the package naming and datasheet package family.
Pin electrical/type metadata is incomplete. Every terminal currently has Pin Type: Unspecified; the datasheet defines power, ground, input, output, and bidirectional/power-stage behavior. This may reduce ERC usefulness.
Terminal descriptions are incomplete. Project terminals do not currently carry the datasheet functional descriptions; adding pin descriptions would improve review quality.

Recommendation

The symbol and footprint are usable for BQ24074RGTT. The main improvement is metadata hygiene: update terminal pin types and descriptions to match the datasheet so automated checks and downstream users get correct electrical intent.

Source
Project Metadata Reviewed / Updated
Key Datasheet Specs
Datasheet Pinout vs Project Symbol
Footprint Cross-Check
Status Output / Control Notes
Required External Components in an Application
Mismatches / Issues Found
Recommendation