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Texas Instruments BQ771601DPJT
- Part No.:
- BQ771601DPJT
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
BQ771601DPJT.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:747
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Product details
Overview
BQ771601DPJT from Texas Instruments is a precision overvoltage protection IC for 2- to 4-series Li-ion battery packs, featuring ±10 mV OVP accuracy, external capacitor-programmed delay (1–2 s with 0.1 µF), and CMOS active-high output. It independently monitors each cell voltage and triggers fault signaling upon overvoltage detection-used in e-bike battery management systems to prevent cell damage during charging.
For engineers reviewing the BQ771601DPJT datasheet, BQ771601DPJT pinout, BQ771601DPJT application, or BQ771601DPJT equivalent, this page delivers verified technical context, real-world timing behavior, validated alternative options, and supply-chain support for industrial battery pack design and production ramp.
Technical Context
The BQ771601DPJT implements independent per-cell voltage sensing with a fixed 4.225 V overvoltage threshold and 50 mV typical hysteresis. Its delay timer uses an external capacitor on the CD pin, with built-in open/short fault detection that forces OUT activation even if the capacitor fails.
Operating from 3 V to 20 V supply, it draws only ~1 µA quiescent current when all cells are below threshold and maintains <100 nA input leakage per sense pin-enabling long-term battery monitoring without significant self-discharge impact.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.225 V ±10 mV at 25°C - ensures precise cell-level cutoff before electrolyte decomposition begins |
| OVP Hysteresis | 50 mV typical - prevents oscillation near threshold during marginal overvoltage conditions |
| Delay Timer Range | 1–2 s with 0.1 µF CD capacitor - configurable via external component for system-level fault response tuning |
| Supply Current | ~1 µA (all cells < VPROTECT) - enables multi-year standby operation in sealed battery packs |
| Input Leakage | <100 nA per Vx pin - minimizes measurement error and avoids cell imbalance from parasitic discharge |
| Output Type | CMOS active-high - directly drives logic-level enable inputs of external MOSFET controllers without pull-up |
| Operating Temp | –40°C to +110°C - supports under-hood and motor-integrated battery applications |
Pinout & Package
Package: 8-pin WSON (DPJ), 3.00 mm × 4.00 mm, exposed thermal pad, RoHS-compliant, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated 3–20 V supply; requires RC filter (RVD/CVD) for noise immunity |
| V1–V4 | Cell voltage sense inputs | Differential inputs for cells 1–4; each requires dedicated RIN/CIN filter for stable monitoring |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; must be low-impedance connection |
| OUT | Fault signal output | CMOS active-high output; sinks 0.5–14 mA when inactive, sources 4.5 mA when active |
| CD | Delay capacitor interface | Charges to 1.5 V then discharges to trigger OUT; detects open/short faults automatically |
Key Features
| Feature | Design Value |
|---|---|
| Per-cell independent OVP | Each of up to four cells monitored separately-no shared threshold or averaging |
| Capacitor-programmed delay | Delay time set by external CCD (0.1–1 µF); tolerance directly impacts timing accuracy |
| CD pin fault detection | Automatically asserts OUT if CD capacitor is open or shorted-ensures fail-safe response |
| Customer Test Mode | Shorting CD to VSS reduces delay to ≤170 ms-accelerates production-line functional testing |
| Ultra-low power operation | 1 µA ICC enables >10-year shelf life in battery-backed systems without periodic recharge |
Applications
| Power Tools | UPS Battery Backup |
|---|---|
Use Scenario: Cordless drill battery packs with 2–4 series Li-ion cells subjected to high-current charging and load transients. IC Role / Device Role / Timing Role: Standalone overvoltage monitor that disables charge path via external FET driver upon cell-level overvoltage detection. Use Value: Prevents thermal runaway by enforcing 4.225 V/cell limit with ±10 mV accuracy-critical for UL 2580 compliance. |
Use Scenario: Rack-mounted UPS systems using 3S Li-ion modules requiring reliable, maintenance-free backup runtime. IC Role / Device Role / Timing Role: Primary OVP supervisor in secondary protection layer, interfacing with MCU-based BMS for redundancy. Use Value: 1–2 s programmable delay allows brief transient overvoltages (e.g., regenerative braking feedback) without nuisance tripping. |
| eBike Battery Packs | Pedal Assist Bicycles |
Use Scenario: Sealed 4S battery packs in Class 3 eBikes operating across –20°C to 60°C ambient with frequent fast-charging cycles. IC Role / Device Role / Timing Role: Independent cell monitor feeding fault signal to main BMS controller; operates autonomously during MCU sleep. Use Value: <100 nA input leakage prevents inter-cell imbalance over months of storage-maintaining SOC accuracy and cycle life. |
Use Scenario: Compact 2S battery modules integrated into lightweight pedal-assist frames with strict size and power constraints. IC Role / Device Role / Timing Role: Primary overvoltage protector with minimal external components-V1/V2 used, V3/V4 shorted per datasheet guidance. Use Value: 3.0 × 4.0 mm WSON package fits tight PCB layouts; 1 µA quiescent current extends battery standby time between rides. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ771600DPJT | Higher OVP threshold (4.300 V), wider hysteresis (300 mV) | Suitable for older NMC chemistries with higher safe charge voltage | Select when legacy 4.3 V/cell charging profiles are required and tighter hysteresis is acceptable |
| BQ771604DPJT | Lower OVP threshold (4.200 V), same hysteresis (50 mV) | Optimized for newer high-density NMC or silicon-anode cells with reduced max voltage | Choose for next-gen cells where 4.225 V may risk accelerated degradation; verify against cell manufacturer spec |
Compared with BQ771601DPJT, BQ771600DPJT provides higher margin for aging cells but less headroom for voltage transients, while BQ771604DPJT offers stricter voltage control at the cost of reduced tolerance to measurement drift or temperature-induced offset.
Availability
BQ771601DPJT is available at Aetrix Electronics and suitable for e-bike battery packs, UPS backup modules, and cordless power tool systems requiring stable component supply, long-lifecycle assurance, and automotive-grade reliability.
Supply support for BQ771601DPJT 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 90 years of innovation in industrial and automotive electronics.
The BQ7716 family is designed specifically for standalone, high-accuracy overvoltage protection in multi-cell Li-ion battery packs-targeting applications where MCU-based BMS redundancy or ultra-low-power autonomous supervision is critical.
FAQ
What is the exact overvoltage protection threshold for BQ771601DPJT?
The BQ771601DPJT has a fixed overvoltage protection threshold of 4.225 V per cell, with ±10 mV accuracy at 25°C and ±54 mV maximum drift across –40°C to +110°C. This value is factory-trimmed and non-adjustable-confirmed in Section 7.5 Electrical Characteristics of the SLUSAX0E datasheet.
Does BQ771601DPJT support 2-cell, 3-cell, and 4-cell configurations?
Yes, BQ771601DPJT supports 2-, 3-, and 4-series Li-ion configurations. Unused sense pins (e.g., V3/V4 in a 2S setup) must be shorted to the adjacent lower-potential pin per Figure 9-2 in the datasheet. All configurations use the same 8-pin WSON package and share identical electrical specifications.
How is the overvoltage delay time set on BQ771601DPJT?
The delay time on BQ771601DPJT is set by an external capacitor (CCD) connected to the CD pin. With a 0.1 µF capacitor, delay ranges from 1 s to 2 s (tCD = K × CCD, where K = 10–20). The CD pin also includes automatic open/short fault detection that forces immediate OUT activation if the capacitor is defective.
What is the output drive capability of BQ771601DPJT?
BQ771601DPJT features a CMOS active-high output capable of sourcing 4.5 mA when active (high) and sinking 0.5–14 mA when inactive (low). It does not require an external pull-up resistor. Output voltage reaches VDD – 0.3 V when driving high under load, enabling direct interface with standard logic inputs.
Is BQ771601DPJT compatible with other members of the BQ7716 family?
BQ771601DPJT shares identical pinout, package, and functional architecture with other BQ7716xy variants (e.g., BQ771600DPJT, BQ771604DPJT), differing only in OVP threshold and hysteresis values. PCB layout and external circuitry are fully interchangeable-only firmware or system-level voltage limits need adjustment for substitution.
BQ771601DPJT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-WDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Battery Protection
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2 ~ 4
- Fault Protection:
- Over Voltage
- Interface:
- -
- Operating Temperature:
- -40°C ~ 110°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-WSON (3x4)
BQ771601DPJT FAQ
1.How can I place an order for BQ771601DPJT through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ771601DPJT 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 BQ771601DPJT reliable?
The price and inventory of BQ771601DPJT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ771601DPJT is usually 5 days.
3.What payment methods are accepted for BQ771601DPJT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ771601DPJT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ771601DPJT?
BQ771601DPJT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ771601DPJT 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 BQ771601DPJT?
For technical support, including BQ771601DPJT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ771601DPJT requirements.
6.How does Aetrix verify that BQ771601DPJT is sourced from the original manufacturer or authorized distributors?
All BQ771601DPJT 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 BQ771601DPJT meets industry standards.
7.What is the process for return or replacement of BQ771601DPJT?
All BQ771601DPJT units undergo pre-shipment inspection (PSI). If there is an issue with BQ771601DPJT, 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 BQ771601DPJT part is unused and in its original packaging.
Return procedure for BQ771601DPJT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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