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BQ7721602PWR

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Texas Instruments Battery Management, TSSOP-24. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BQ7721602PWR

Texas Instruments · Battery Management · TSSOP-24

BQ7721602PWR from Texas Instruments, in a TSSOP-24. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 NC unconnected Not electrically connected internally; may be left floating.
2 VDD power_in Non-regulated IC supply input, recommended 5 V to 75 V with an 85 V absolute maximum (VDD to VSS); a series resistor limits current and a capacitor to ground filters noise.
3 V16 input Voltage sense input for the positive terminal of the 16th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
4 V15 input Voltage sense input for the positive terminal of the 15th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
5 V14 input Voltage sense input for the positive terminal of the 14th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
6 V13 input Voltage sense input for the positive terminal of the 13th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
7 V12 input Voltage sense input for the positive terminal of the 12th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
8 V11 input Voltage sense input for the positive terminal of the 11th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
9 V10 input Voltage sense input for the positive terminal of the 10th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
10 V9 input Voltage sense input for the positive terminal of the 9th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
11 V8 input Voltage sense input for the positive terminal of the 8th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
12 V7 input Voltage sense input for the positive terminal of the 7th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
13 V6 input Voltage sense input for the positive terminal of the 6th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
14 V5 input Voltage sense input for the positive terminal of the 5th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
15 NC unconnected Not electrically connected internally; may be left floating.
16 NC unconnected Not electrically connected internally; may be left floating.
17 V4 input Voltage sense input for the positive terminal of the 4th cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
18 V3 input Voltage sense input for the positive terminal of the 3rd cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
19 V2 input Voltage sense input for the positive terminal of the 2nd cell from the bottom of the pack; Vn to Vn-1 recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V to VSS, and requires a series RC filter.
20 V1 input Voltage sense input for the positive terminal of the lowest cell in the pack; V1 to VSS recommended 0 V to 5 V, absolute maximum -0.3 V to 85 V, and requires a series RC filter.
21 VSS power_in Electrically connected to the IC ground and the negative terminal of the lowest cell in the pack; should connect to the CELL- terminal per the layout guidelines.
22 COUT output Fault output for overvoltage, open-wire, undertemperature and overtemperature; for this variant it is configured active-high driving to 6 V, absolute maximum COUT to VSS -0.3 V to 85 V, and may be left floating when unused.
23 DOUT output Fault output for undervoltage, open-wire, undertemperature and overtemperature; for this variant it is configured active-high driving to 6 V, absolute maximum DOUT to VSS -0.3 V to 85 V, and may be left floating when unused.
24 TS input Temperature sensor input with a recommended range of 0 V to 1.5 V (absolute maximum -0.3 V to 1.5 V); if unused, connect to VSS through a 10 kΩ resistor.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-24
Category Power Management (PMIC)
Pins 24

CAD (KiCad official)

  • Symbol: BQ7721602PWR
  • Footprint: Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm
  • 3D model: TSSOP-24 (KiCad packages3D, STEP)
  • 3D model files: bq7721602pwr-etched.step / bq7721602pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bq7721602pwr.step / bq7721602pwr.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (29 pp, sha256 090af0809348e250, retrieved 2026-10-08, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF