My Inquiry
My Account
Texas Instruments BQ7790522PW
- Part No.:
- BQ7790522PW
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ7790522PW.pdf
- Description:
- IC BATT PROT LI-ION 3-5C 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,050
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ7790522PW from Texas Instruments is a 5-cell stackable lithium-ion battery protector IC implementing factory-programmed voltage, current, temperature, and open-wire protections without MCU control. It delivers ±10 mV overvoltage/undervoltage accuracy, 100 mV overcurrent discharge 2 threshold, and 70°C/50°C overtemperature discharge/charge thresholds in a 20-pin TSSOP package - deployed in power tools and light electric vehicles.
For engineers reviewing the BQ7790522PW datasheet, BQ7790522PW pinout, BQ7790522PW application, or BQ7790522PW equivalent, key selection criteria include its 5-series cell support, independent CHG/DSG low-side NMOS drivers, 6 µA normal-mode current, and cascading interface for ≥6-series stacks - all validated for industrial-grade battery pack protection design.
Technical Context
The BQ7790522PW operates as a standalone analog protector with no firmware or host dependency. Its protection logic uses internal comparators with fixed delay timers (e.g., 1 s OV/UV delay, 350 ms OCD2 delay) and thermistor-based temperature sensing referenced to VTB output.
It supports 3–5 series cell configurations natively via CCFG pin state detection, and enables scalable ≥6-series protection through CHGU-to-CTRC cascading between stacked devices. All fault responses drive independent CHG and DSG outputs to control external low-side N-channel FETs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Support | Factory-configured for 5-series Li-ion packs; CCFG pin detects configuration |
| Normal Mode Current | 6 µA typical - enables multi-year runtime in always-on battery protection |
| OCD2 Threshold | 100 mV (VSRP–VSRN) - sets primary discharge overcurrent trip at ~50 A with 2 mΩ sense resistor |
| OV/UV Accuracy | ±10 mV at 25°C - ensures tight cell balancing window without calibration |
| OTD/OTC Thresholds | 70°C discharge / 50°C charge - matches standard NTC thermistor curves using VTB bias |
| Shutdown Current | 0.5 µA max - preserves pack energy during storage or deep sleep |
| Package | TSSOP-20 (6.5 mm × 4.4 mm) - surface-mount compatible with automated PCB assembly |
Pinout & Package
Package: 20-pin TSSOP (PW), 6.50 mm × 4.40 mm body size, JEDEC MO-153 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 1) | Power supply input | 3–25 V main supply; powers internal regulators and logic |
| VC1–VC5 (Pins 7,6,5,4,3) | Cell voltage sense inputs | Monitor individual cell voltages up to 5-series; VC5 must connect to VC4 on BQ77904 only |
| SRP/SRN (Pins 9,10) | Current sense differential inputs | Measure pack current via sense resistor; enable OCD1/OCD2/SCD detection |
| CHG (Pin 13) | Charge FET driver output | Drives low-side NMOS gate for charge path control; 1 mA sink capability |
| DSG (Pin 11) | Discharge FET driver output | Drives low-side NMOS gate for discharge path control; 1 mA sink capability |
| CHGU (Pin 12) | Upper-device CHG signal output | Used in stacked configurations to feed CHG signal to CTRC of lower device |
| CTRC/CTRD (Pins 18,19) | FET override control inputs | Enable/disable CHG/DSG drivers externally; support cascaded stack control |
| TS (Pin 15) | Thermistor measurement input | Connects to NTC thermistor; referenced to VTB for temperature threshold calculation |
| VTB (Pin 16) | Thermistor bias output | Provides regulated 2.5 V reference for TS input; enables ratio-metric temperature sensing |
| LD (Pin 14) | Load removal detection input | Detects open PACK– connection; triggers fault if voltage drops below 1.3 V |
Key Features
| Feature | Design Value |
|---|---|
| Stackable architecture | Supports ≥6-series configurations via CHGU→CTRC cascading - eliminates need for master controller |
| Independent CHG/DSG drivers | Separate low-side NMOS gate drivers allow asymmetric charge/discharge disable - critical for safe Li-ion operation |
| Open-wire detection | Monitors VCx–VCx−1 voltage drop; 500 mV threshold with 100 mV hysteresis - detects broken interconnects before cell imbalance |
| Functional safety documentation | TI provides FIT rate data, failure mode analysis, and diagnostic coverage reports - accelerates ISO 26262 ASIL-B system certification |
| Customer Test Mode (CTM) | Enables fault simulation and timing validation via VDD-triggered entry - reduces production test cycle time |
Applications
| Power Tools | Garden Tools |
|---|---|
|
Use Scenario: Cordless drill/driver battery packs operating at 18–36 V with high pulse discharge currents. IC Role / Device Role / Timing Role: Primary protector executing real-time overcurrent (OCD2 = 100 mV) and overtemperature (OTD = 70°C) shutdown within 350 ms and 4.5 s respectively. Use Value: Prevents thermal runaway during stall conditions while maintaining >99.9% uptime via ultra-low 6 µA quiescent current. |
Use Scenario: Battery-powered hedge trimmers and leaf blowers requiring robust vibration tolerance and wide temperature operation. IC Role / Device Role / Timing Role: Standalone protector managing 5-cell Li-ion stacks with open-wire detection (OW delay = 4.5 s) and dual-temperature thresholds (OTD/UTD). Use Value: Eliminates need for microcontroller-based monitoring - reduces BOM cost and firmware validation burden. |
| Light Electric Vehicles | Energy Storage Systems |
|
Use Scenario: E-bike and e-scooter battery modules (36–48 V) subject to regenerative braking and rapid charge cycles. IC Role / Device Role / Timing Role: Cascaded protector enabling 10–15 series configurations; uses CHGU/CTRC signaling to coordinate CHG/DSG across stacked devices. Use Value: Enables modular pack design - same BQ7790522PW used across 5-cell base units and scaled stacks. |
Use Scenario: Residential and commercial Li-ion backup systems (48–72 V) requiring long-term reliability and fault logging. IC Role / Device Role / Timing Role: Primary hardware-level protector with shutdown mode (0.5 µA) for low-power maintenance states between grid outages. Use Value: Extends shelf life of idle packs by minimizing self-discharge contribution from protection circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar battery protector applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ7790521PW | Lower overvoltage threshold (3.7 V vs. 4.25 V); same 5-cell support and pinout | Better suited for LFP or high-safety-margin Li-ion chemistries requiring tighter OV clamp | Select when cell chemistry demands reduced overvoltage trip point without changing layout |
| BQ7790512PW | Higher undervoltage threshold (2.8 V vs. 2.8 V nominal, but 400 mV hysteresis vs. 200 mV); identical package and pinout | Preferred for applications needing aggressive UV recovery to prevent premature shutdown under load | Choose when battery load profiles cause transient voltage sag that must not trigger UV fault |
Compared with BQ7790522PW, BQ7790521PW offers lower overvoltage protection for conservative chemistries, while BQ7790512PW provides wider UV hysteresis to suppress nuisance trips - both retain identical 20-pin TSSOP packaging and cascading capability.
Availability
BQ7790522PW is available at Aetrix Electronics and suitable for power tools, light electric vehicles, and energy storage systems requiring stable component supply, long-lifecycle assurance, and TI-qualified automotive-grade reliability.
Supply support for BQ7790522PW includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in battery management solutions.
The BQ7790522PW belongs to TI's BQ77905 family of ultra-low-power stackable battery protectors - designed specifically for cost-sensitive, high-reliability Li-ion packs where MCU-free protection and field-proven fault response are mandatory.
FAQ
What is the factory-programmed overvoltage threshold for BQ7790522PW?
The BQ7790522PW has a factory-programmed overvoltage threshold of 4.25 V (4250 mV) with 100 mV hysteresis and 1-second detection delay. This value is fixed per device variant and cannot be adjusted in-circuit - confirmed in Table 5-2 of the SLUSCM3K datasheet revision K.
Does BQ7790522PW support 6-series or higher battery configurations?
Yes, BQ7790522PW supports ≥6-series configurations via stacking: the CHGU output of an upper device connects to the CTRC input of the device below it, enabling coordinated CHG/DSG control across multiple BQ7790522PW units - validated for up to 20-series stacks per TI documentation.
What is the purpose of the CCFG pin on BQ7790522PW?
The CCFG pin on BQ7790522PW detects cell count configuration: floating (5-cell), grounded (3-cell), or AVDD-connected (4-cell). For BQ7790522PW, CCFG is internally biased to detect 5-series operation - confirmed by its inclusion in the BQ7790522 row of Table 5-2 and functional description in Section 8.1.
How does BQ7790522PW handle overtemperature discharge faults?
BQ7790522PW triggers overtemperature discharge (OTD) at 70°C using a ratio-metric threshold (20.56% of VTB) with 4.5-second detection delay and automatic DSG FET disable. Recovery occurs at 55°C (26.12% VTB) - values specified in Table 7-5 Electrical Characteristics and validated in Figure 7-3 of the datasheet.
Is BQ7790522PW pin-compatible with other BQ77905 variants?
Yes, all BQ77905 variants including BQ7790522PW use the identical 20-pin TSSOP (PW) package and share full pinout compatibility - differences are limited to factory-programmed protection thresholds and delays, not electrical or mechanical interfaces.
BQ7790522PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 3 ~ 5
- Fault Protection:
- Over Current, Over Temperature, Over/Under Voltage, Short Circuit
- Interface:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
BQ7790522PW FAQ
1.How can I place an order for BQ7790522PW through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ7790522PW on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for BQ7790522PW reliable?
The price and inventory of BQ7790522PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ7790522PW is usually 5 days.
3.What payment methods are accepted for BQ7790522PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ7790522PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ7790522PW?
BQ7790522PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ7790522PW order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for BQ7790522PW?
For technical support, including BQ7790522PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ7790522PW requirements.
6.How does Aetrix verify that BQ7790522PW is sourced from the original manufacturer or authorized distributors?
All BQ7790522PW products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that BQ7790522PW meets industry standards.
7.What is the process for return or replacement of BQ7790522PW?
All BQ7790522PW units undergo pre-shipment inspection (PSI). If there is an issue with BQ7790522PW, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The BQ7790522PW part is unused and in its original packaging.
Return procedure for BQ7790522PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ7790522PW Tags
-
BQ29700DSER
Texas Instruments
-
S-8241ABKMC-GBKT2G
ABLIC Inc.
-
S-8241ABPMC-GBPT2G
ABLIC Inc.
-
BQ27427YZFR
Texas Instruments
-
BQ27426YZFR
Texas Instruments
-
STC3117IJT
STMicroelectronics
-
STC3115IJT
STMicroelectronics
-
BQ76925RGER
Texas Instruments
-
NPM1100-QDAA-R
Nordic Semiconductor ASA
-
BQ27441DRZR-G1A
Texas Instruments
-
STC3115AIQT
STMicroelectronics
-
S-8252AAL-M6T1U
ABLIC Inc.
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
