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Texas Instruments BQ771601DPJR
- Part No.:
- BQ771601DPJR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- 8-WDFN Exposed Pad
- Datasheet:
-
BQ771601DPJR.pdf
- Description:
- IC BATT PROT LI-ION 2-4CEL 8WSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,485
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Product details
Overview
BQ771601DPJR from Texas Instruments is a precision overvoltage protection IC for 2- to 4-series Li-ion battery packs, featuring ±10 mV OVP accuracy, 4.225 V fixed overvoltage threshold, and external capacitor-programmed delay timer (1–2 s with 0.1 µF). It monitors each cell independently and drives a CMOS active-high fault output, used in e-bike battery management systems to prevent cell damage during charging.
For engineers reviewing the BQ771601DPJR datasheet, BQ771601DPJR pinout, BQ771601DPJR application, or BQ771601DPJR equivalent, key selection criteria include its 4.225 V OVP threshold with only 50 mV hysteresis, ultra-low 1 µA supply current under normal operation, <100 nA per-cell input leakage, 8-pin WSON (3.0 × 4.0 mm) package, and integrated CD pin fault detection for open/shorted delay capacitors.
Technical Context
The BQ771601DPJR implements independent per-cell voltage sensing using precision analog comparators referenced to a stable internal bandgap. Its overvoltage response is governed by an external RC delay circuit on the CD pin, where charging current (300 µA) and discharging current (100 nA) define timing with ±10 mV threshold accuracy across –40°C to +110°C.
It operates in three functional modes: NORMAL (all cells below 4.225 V), OVERVOLTAGE (any cell ≥4.225 V triggers CD timer; OUT goes high after delay), and Customer Test Mode (CD shorted to VSS reduces delay to ≤170 ms). The CMOS active-high output delivers 4.5 mA source current and sinks up to 14 mA when inactive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.225 V ±10 mV at 25°C - ensures precise cell-level overvoltage cutoff without premature tripping |
| OVP Hysteresis | 50 mV typical - prevents oscillation near threshold during marginal overvoltage conditions |
| Supply Current | ≈1 µA when all cells < VPROTECT - enables multi-year standby in battery-powered tools and UPS |
| Per-Cell Input Leakage | <100 nA - minimizes self-discharge impact on stacked Li-ion cells |
| Delay Timer Range | 1–2 s with 0.1 µF CD capacitor - configurable via external component for system-level safety timing compliance |
| Output Drive | CMOS active-high, 4.5 mA source / 14 mA sink - directly interfaces with MCU GPIO or discrete FET gate drivers |
| Operating Temp | –40°C to +110°C - supports under-hood and power-tool environments |
Pinout & Package
Package: 8-pin WSON (DPJ), 3.00 mm × 4.00 mm, exposed thermal pad, RoHS-compliant, moisture sensitivity 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 | Cell 1 positive sense input | Senses voltage across lowest cell (V1–VSS); requires RIN/CIN filter for stability |
| V2 | Cell 2 positive sense input | Senses voltage across second cell (V2–V1); unused pins in 2S/3S configs must be shorted |
| V3 | Cell 3 positive sense input | Senses voltage across third cell (V3–V2); supports up to 4S configuration |
| V4 | Cell 4 positive sense input | Senses voltage across top cell (V4–V3); not connected in 2S/3S designs |
| VSS | Ground reference | IC ground and negative terminal of lowest cell; common return for all sense paths |
| CD | External delay capacitor connection | Charges to 1.5 V then discharges to trigger OUT; detects open/short faults autonomously |
| OUT | Overvoltage fault output | CMOS active-high signal; drives high after delay expiration to indicate OV condition |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-cell monitoring | Four dedicated high-impedance inputs (V1–V4) enable true series-cell voltage tracking without shared reference errors |
| Capacitor-programmable delay timer | 1–2 s range with 0.1 µF CCD; eliminates need for internal oscillator trimming or digital programming |
| CD pin fault detection | Autonomously triggers OUT if CD capacitor is open-circuited or shorted - no external supervision required |
| Customer Test Mode | Shorting CD to VSS reduces delay to ≤170 ms - accelerates production-line OV functional testing |
| Ultra-low quiescent current | 1 µA ICC at VCELL(ALL) < VPROTECT - preserves pack capacity during long-term storage or idle states |
Applications
| eBike Battery Packs | Power Tools |
|---|---|
|
Use Scenario: Monitors 3S or 4S Li-ion packs during fast charging and regenerative braking, preventing individual cell overvoltage that could cause thermal runaway. IC Role / Device Role / Timing Role: Standalone analog OVP monitor with autonomous delay timer; acts as first-line hardware protection before BMS firmware intervention. Use Value: ±10 mV OVP accuracy and 50 mV hysteresis ensure reliable cutoff at 4.225 V without nuisance trips during voltage ripple, extending cycle life and safety certification margin. |
Use Scenario: Integrated into cordless drill/driver battery packs to halt charging when any cell exceeds safe voltage, especially during high-current AC/DC adapter charging. IC Role / Device Role / Timing Role: Hardware-enforced overvoltage guardrail; OUT signal disables charge FETs or alerts host MCU within programmable 1–2 s window. Use Value: 1 µA supply current and <100 nA input leakage minimize parasitic drain on stored packs, maintaining readiness over months of shelf life. |
| Light Electric Vehicles (LEVs) | UPS Battery Backup Systems |
|
Use Scenario: Protects 2S–4S Li-ion modules in e-scooters and pedal-assist bicycles against overvoltage during regen braking or grid-charging anomalies. IC Role / Device Role / Timing Role: Independent cell-level protector with fail-safe CD pin diagnostics; triggers hard shutdown before BMS software layer responds. Use Value: CD fault detection ensures OVP remains active even with defective external capacitor - critical for safety-critical mobility applications. |
Use Scenario: Embedded in enterprise-grade UPS battery cartridges to safeguard against charger malfunction or aging-induced cell imbalance. IC Role / Device Role / Timing Role: Analog hardware watchdog; provides deterministic, temperature-stable OVP response independent of microcontroller uptime or firmware state. Use Value: –40°C to +110°C operating range and ±44 mV OVP drift across temperature ensure consistent protection in uncontrolled server-room or industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ771600DPJR | OVP threshold = 4.300 V, hysteresis = 300 mV - higher trip point, wider recovery gap | Better suited for chemistries requiring higher full-charge voltage (e.g., some LCO cells) | Select when system requires 4.3 V OVP and can tolerate larger hysteresis-induced voltage undershoot during recovery |
| BQ771604DPJR | OVP threshold = 4.200 V, hysteresis = 50 mV - lower trip point, same hysteresis as BQ771601DPJR | Optimized for newer NMC/NCA cells with tighter voltage windows and reduced overcharge tolerance | Choose for next-gen high-energy-density packs where 4.20 V represents absolute maximum safe voltage |
Compared with BQ771600DPJR and BQ771604DPJR, the BQ771601DPJR offers the optimal balance of 4.225 V OVP threshold and 50 mV hysteresis for mainstream NMC-based e-mobility and power tool packs - delivering tighter control than BQ771600 while avoiding premature cutoff risk inherent in BQ771604's 4.20 V setting.
Availability
BQ771601DPJR is available at Aetrix Electronics and suitable for e-bike battery management, cordless power tool packs, and light electric vehicle energy storage systems requiring stable component supply, long-lifecycle support, and automotive-grade reliability.
Supply support for BQ771601DPJR 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 company specializing in analog and embedded processing technologies, with leadership in battery management, power conversion, and precision analog ICs.
The BQ7716 family is designed specifically for cost-sensitive, high-reliability overvoltage protection in multi-cell Li-ion battery packs - targeting applications where simplicity, low power, and hardware-enforced safety are mandatory.
FAQ
What is the overvoltage protection threshold of the BQ771601DPJR?
The BQ771601DPJR has a fixed overvoltage protection threshold of 4.225 V with ±10 mV accuracy at 25°C. This value is trimmed at wafer test and remains stable across temperature, with worst-case drift of ±54 mV at 110°C. The BQ771601DPJR does not support user adjustment - the threshold is factory-set and guaranteed per device.
How does the external delay capacitor affect timing in the BQ771601DPJR?
In the BQ771601DPJR, the external capacitor on the CD pin sets the overvoltage delay time via tCD = K × CCD, where K ranges from 10 to 20 s/F. With a 0.1 µF capacitor, the delay is 1–2 seconds. The BQ771601DPJR also monitors CD pin voltage to detect open or shorted capacitors and will assert OUT immediately if a fault is identified.
What package type and dimensions does the BQ771601DPJR use?
The BQ771601DPJR uses an 8-pin WSON (DPJ) package measuring 3.00 mm × 4.00 mm with an exposed thermal pad. It is RoHS-compliant, rated MSL-1, and compatible with standard reflow profiles. The part marking "771601" appears on the top surface, and the device is supplied in large tape-and-reel (3000 pcs) or small tape-and-reel (250 pcs) formats.
Does the BQ771601DPJR support 2-cell, 3-cell, and 4-cell configurations?
Yes, the BQ771601DPJR supports 2-, 3-, and 4-series Li-ion configurations. For 2S operation, V3 and V4 pins are shorted to V2; for 3S, V4 is shorted to V3. All configurations retain independent per-cell monitoring on active inputs, and the BQ771601DPJR maintains full OVP accuracy and delay functionality regardless of stack size.
What is the function of the Customer Test Mode in the BQ771601DPJR?
The Customer Test Mode in the BQ771601DPJR is activated by shorting the CD pin to VSS, reducing the overvoltage delay to ≤170 ms. This allows rapid functional verification during production testing without modifying hardware or firmware. The BQ771601DPJR retains full OVP accuracy and fault signaling in this mode, making it ideal for high-volume battery pack manufacturing.
BQ771601DPJR 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)
BQ771601DPJR FAQ
1.How can I place an order for BQ771601DPJR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ771601DPJR 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 BQ771601DPJR reliable?
The price and inventory of BQ771601DPJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ771601DPJR is usually 5 days.
3.What payment methods are accepted for BQ771601DPJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ771601DPJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ771601DPJR?
BQ771601DPJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ771601DPJR 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 BQ771601DPJR?
For technical support, including BQ771601DPJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ771601DPJR requirements.
6.How does Aetrix verify that BQ771601DPJR is sourced from the original manufacturer or authorized distributors?
All BQ771601DPJR 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 BQ771601DPJR meets industry standards.
7.What is the process for return or replacement of BQ771601DPJR?
All BQ771601DPJR units undergo pre-shipment inspection (PSI). If there is an issue with BQ771601DPJR, 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 BQ771601DPJR part is unused and in its original packaging.
Return procedure for BQ771601DPJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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