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BQ7790503PWR

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Texas Instruments Battery Management, TSSOP-20. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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BQ7790503PWR

Texas Instruments · Battery Management · TSSOP-20

BQ7790503PWR from Texas Instruments, in a TSSOP-20. 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 VDD power_in Supply voltage input, recommended 3 V to 25 V, with an absolute maximum input of 36 V.
2 AVDD power_out Analog supply output that should only be connected to a capacitor; its recommended range is 0 V to 3 V.
3 VC5 input Cell voltage sense input; the datasheet states VC5-VC4 must stay within 0 V to 5 V and that pin 3 must be connected to pin 4 only on the BQ77904.
4 VC4 input Cell voltage sense input with VC4-VC3 recommended between 0 V and 5 V.
5 VC3 input Cell voltage sense input with VC3-VC2 recommended between 0 V and 5 V.
6 VC2 input Cell voltage sense input with VC2-VC1 recommended between 0 V and 5 V.
7 VC1 input Cell voltage sense input with VC1 to VSS recommended between 0 V and 5 V.
8 AVSS power_in Analog ground pin for the device.
9 SRP input Current sense input connected to the battery side of the sense resistor, with recommended range -0.2 V to 0.8 V.
10 SRN input Current sense input connected to the PACK- side of the sense resistor, with recommended range -0.2 V to 0.8 V.
11 DSG output Discharge (DSG) FET driver output, rated 0 V to 16 V recommended and -0.3 V to 20 V absolute maximum with up to 1 mA output current.
12 CHGU output CHG signal output for the upper device of a stack, feeding the CHG signal to the CTRC pin of the lower device, rated 0 V to 16 V recommended with up to 1 mA output current.
13 CHG output Charge (CHG) FET driver output for a single device or the bottom device of a stack, rated 0 V to 16 V recommended with up to 1 mA output current.
14 LD input PACK- load removal detection input, rated 0 V to 16 V recommended and -30 V to 20 V absolute maximum.
15 TS input Thermistor measurement input, recommended 0 V to VTB; connect a 10-kΩ resistor to AVSS if the function is not used.
16 VTB output Thermistor bias output, recommended 0 V to 3 V with absolute maximum -0.3 V to 3.6 V.
17 CCFG input Cell series-configuration input, recommended 0 V to AVDD.
18 CTRC input CHG and DSG override input, recommended 0 V to (VDD + 5) V.
19 CTRD input CHG and DSG override input, recommended 0 V to (VDD + 5) V.
20 DVSS power_in Digital ground pin for the device.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Power Management (PMIC)
Pins 20

CAD (KiCad official)

  • Symbol: BQ7790503PWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: bq7790503pwr-etched.step / bq7790503pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bq7790503pwr.step / bq7790503pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (48 pp, sha256 f04162b24e7e7c22, 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