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BQ7790400PWR

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

componentpower supply chipbq7790400pwrfactory-2.0.0extractor-text

Verified BQ7790400PWR

by Ray · last 31 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

31 Oct 2026RayPublished by the parts factory: tier mfr, 20 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: BQ7790400PWR · TSSOP-20 · 20 pins
  • ✓copper: 20 copper pads, none touching another net
  • ✓datasheet: all 20 pin names found in the 49-page datasheet
  • ✓distributor: lcsc C2873158, digikey 296-50989-2-ND, mouser 595-BQ7790400PWR
  • ✓family: TSSOP-20_4.4x6.5mm_P0.65mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-xiv7qs6_/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.45)
  • ✓pads: 20 pins = 20 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 20 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ bq7790400pwr.kicad_sym✓ bq7790400pwr.kicad_mod✓ bq7790400pwr.step
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Ray Publish 0.1.0 275b550 11d ago

BQ7790400PWR

Texas Instruments · Battery Management ICs · TSSOP-20

BQ7790400PWR 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 pin for the device.
2 AVDD power_out Analog supply pin that should only be connected to a capacitor.
3 VC5 input Cell voltage sense input; pin 3 must be connected to pin 4 on the BQ77904 device.
4 VC4 input Cell voltage sense input.
5 VC3 input Cell voltage sense input.
6 VC2 input Cell voltage sense input.
7 VC1 input Cell voltage sense input.
8 AVSS power_in Analog ground.
9 SRP input Current sense input connecting to the battery side of the sense resistor.
10 SRN input Current sense input connecting to the PACK- side of the sense resistor.
11 DSG output DSG FET driver output.
12 CHGU output CHG FET signal output for the upper device of a stack; it feeds the CHG signal to the CTRC pin of the lower device.
13 CHG output CHG FET driver output, used on a single device or on the bottom device of a stack configuration.
14 LD input PACK- load removal detection input.
15 TS input Thermistor measurement input; connect a 10-kΩ resistor to AVSS if the function is not used.
16 VTB output Thermistor bias output.
17 CCFG input Cell in series-configuration input.
18 CTRC input CHG and DSG override input.
19 CTRD input CHG and DSG override input.
20 DVSS power_in Digital ground.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package TSSOP-20
Category Power Supply Chip
Pins 20

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Shutdown threshold (VDD falling) V(SHUT) 2 3.25 V VDD falling, 6 to 0 V 7
AVDD voltage V(AVDD) 2.1 2.5 3.25 V C(VDD) = 1 µF 7
NORMAL mode current (bq77904/bq77905) ICC 6 9 µA Cell1 through Cell5 = 4 V, VDD = 20 V (bq77905) 7
Fault condition current I(CFAULT) 8 12 µA State comparator on 7
SHUTDOWN mode current IOFF 0.5 µA VDD < VSHUT 7
Input leakage current at VCx pins ILKG(OW_DIS) -100 0 100 nA All cell voltages = 4 V, Open-wire disable configuration 7
Overvoltage programmable threshold range VOV 3000 4575 mV 7
Undervoltage programmable threshold range VUV 1200 3000 mV 7
OV, UV detection accuracy V(VA) -10 10 mV TA = 25°C, OV detection accuracy 7
OV, UV detection accuracy V(VA) -18 18 mV TA = 25°C, UV detection accuracy 7
OV, UV detection accuracy V(VA) -28 26 mV TA = 0 to 60°C 7
OV, UV detection accuracy V(VA) -40 40 mV TA = -40 to 85°C 7
OV hysteresis programmable threshold range VHYS(OV) 0 400 mV 7
UV hysteresis programmable threshold range VHYS(UV) 200 800 mV 7
Overtemperature in discharge programmable threshold (OTD) VOTD 17.36 18.22 19.51 %VTB Threshold for 70°C 7
Overtemperature in discharge recovery (OTD) VOTD(REC) 22.12 23.2 24.24 %VTB Recovery threshold at 60°C for when VOTD is at 70°C 8
Overtemperature in charge programmable threshold (OTC) VOTC 29.15 29.38 31.45 %VTB Threshold for 50°C 8
Overtemperature in charge recovery (OTC) VOTC(REC) 36.18 36.82 38.47 %VTB Recovery threshold at 40°C when VOTD is at 50°C 8
Undertemperature in discharge programmable threshold (UTD) VUTD 86.41 87.14 89.72 %VTB Threshold for -20°C 8
Undertemperature in discharge recovery (UTD) VUTD(REC) 80.04 80.94 83.1 %VTB Recovery threshold at -10°C when VUTD is at -20°C 8
Undertemperature in charge programmable threshold (UTC) VUTC 75.06 77.22 78.32 %VTB Threshold for -5°C 8
Undertemperature in charge recovery (UTC) VUTC(REC) 68.8 69.73 71.71 %VTB Recovery threshold at 5°C when VUTC is at -5°C 8
Overcurrent discharge 1 programmable threshold range VOCD1 -85 -10 mV (VSRP, VSRN) 8
Overcurrent discharge 2 programmable threshold range VOCD2 -170 -20 mV (VSRP, VSRN) 8
Short circuit discharge programmable threshold range VSCD -340 -40 mV (VSRP, VSRN) 8
OCD1 detection accuracy at lower thresholds VCCAL -30 30 % VOCD1 > -20 mV 8
OCD1, OCD2, SCD detection accuracy VCCAH -20 20 % VOCD1 ≤ -20 mV; all OCD2 and SCD threshold ranges 8
CHG/CHGU/DSG on voltage V(FETON) 11 12 14 V VDD ≥ 12 V, CL = 10 nF 8
CHGU/DSG off resistance R(DSGOFF) 10 16 Ω CHGU/DSG off and pin held at 2 V 8
Overvoltage detection delay time (2-s delay option) tOVn_DELAY 1.8 2 2.7 s 2-s delay option 10
Undervoltage detection delay time (2-s delay option) tUVn_DELAY 1.8 2 2.7 s 2-s delay option 10
Overtemperature charge detection delay time tOTC_DELAY 3.6 4.5 5.3 s 10
Undertemperature charge detection delay time tUTC_DELAY 3.6 4.5 5.3 s 10
Overtemperature discharge detection delay time tOTD_DELAY 3.6 4.5 5.3 s 10
Undertemperature discharge detection delay time tUTD_DELAY 3.6 4.5 5.3 s 10
Overcurrent 1 detection delay time (1420-ms delay option) tOCD1_DELAY 1290 1420 1620 ms 1420-ms delay option 10
Overcurrent 2 detection delay time (350-ms delay option) tOCD2_DELAY 320 350 405 ms 350-ms delay option 10
Short-circuit detection delay time (360-µs delay option) tSCD_RELAY 220 400 610 µs 360-µs delay option 10
Input voltage VDD, VC5-VC1, CCFG, CTRD, CTRC VI -0.3 36 V Referenced to VSS 6
Input voltage LD VI -30 20 V Referenced to VSS 6
Input voltage SRN, SRP, TS, AVDD, CCFG VI -0.3 3.6 V Referenced to VSS 6
Output voltage DSG, CHGU VO -0.3 20 V Referenced to VSS 6
Output voltage CHG VO -30 20 V Referenced to VSS 6
Output voltage VTB VO -0.3 3.6 V Referenced to VSS 6
Input current LD, CHG II 500 µA 6
Input current CHGU, DSG II 1 mA 6
Output current CHG IO 1 mA 6
Output current CHGU, DSG IO 1 mA 6
Storage temperature Tstg -65 150 °C 6
Supply voltage VDD VBAT 3 25 V Over operating free-air temperature range 6
Input voltage VC5-VC4 ... VC1-VSS (cell inputs) VI 0 5 V Over operating free-air temperature range 6
Input voltage CTRD, CTRC VI 0 V Over operating free-air temperature range 6
Input voltage CCFG VI 0 V Over operating free-air temperature range 6
Input voltage SRN, SRP VI -0.2 0.8 V Over operating free-air temperature range 6
Input voltage LD VI 0 16 V Over operating free-air temperature range 6
Input voltage TS VI 0 V Over operating free-air temperature range 6
Output voltage CHG, CHGU, DSG VO 0 16 V Over operating free-air temperature range 6
Output voltage VTB, AVDD VO 0 3 V Over operating free-air temperature range 6
Operating free-air temperature range TA -40 85 °C 6
Junction-to-ambient thermal resistance (PW TSSOP 20 pins) RθJA 98.4 °C/W 7

CAD (KiCad official)

  • Symbol: BQ7790400PWR
  • Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
  • 3D model: TSSOP-20 (KiCad packages3D, STEP)
  • 3D model files: bq7790400pwr-etched.step / bq7790400pwr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); bq7790400pwr.step / bq7790400pwr.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (49 pp, sha256 d94ef1e3c87b48ab, retrieved 2026-10-31, tier: manufacturer)
  • 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