My Inquiry
My Account
Texas Instruments BQ771602DPJR
- Part No.:
- BQ771602DPJR
- Manufacturer:
- Texas Instruments
- Category:
- Battery Management
- Package:
- -
- Datasheet:
-
BQ771602DPJR.pdf
- Description:
- BQ7716 - FAMILY OVERVOLTAGE PROT
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
BQ771602DPJR from Texas Instruments is a 2- to 4-series Li-ion battery overvoltage protection IC with independent cell monitoring, N-channel open-drain active-low output, 4.225 V fixed OVP threshold, ±10 mV accuracy at 25°C, and external capacitor-programmed delay (1–2 s with 0.1 µF). It safeguards e-bike and power tool battery packs against cell overvoltage during charge cycles.
For engineers reviewing the BQ771602DPJR datasheet, BQ771602DPJR pinout, BQ771602DPJR application, or BQ771602DPJR equivalent, key selection criteria include its NCH open-drain output configuration, 4.225 V / 50 mV hysteresis OVP setting, ultra-low 1 µA supply current, <100 nA per-cell input leakage, and WSON-8 package compatibility with compact 2S–4S pack layouts.
Technical Context
The BQ771602DPJR implements independent analog voltage comparators per cell input (V1–V4), each referenced to an internal precision bandgap. An overvoltage event on any cell triggers a CD-pin-based RC delay timer with built-in fault detection for shorted/open capacitors.
In active-low mode, the OUT pin sinks up to 14 mA when triggered and presents high-impedance (leakage <100 nA) otherwise-requiring an external pull-up resistor. The device operates across –40°C to +110°C with VDD from 3 V to 20 V and supports Customer Test Mode for sub-170 ms OV verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| OVP Threshold | 4.225 V ±10 mV at 25°C - sets precise overvoltage trip point for all monitored cells |
| OV Hysteresis | 50 mV typical - prevents chatter near threshold during voltage decay after fault clearance |
| Supply Current | 1–2 µA - enables multi-year operation in always-on battery protection circuits |
| Per-Cell Input Leakage | <100 nA - minimizes cell voltage measurement error and self-discharge impact |
| Output Type | N-channel open-drain, active-low - requires external pull-up; sinks 14 mA max during OV |
| Delay Timer Range | 1–2 s with 0.1 µF CD capacitor - programmable via external capacitor for system-level timing control |
| Operating Temp | –40°C to +110°C - qualified for harsh environments including power tools and e-bike motor compartments |
Pinout & Package
Package: 8-pin WSON (3.00 mm × 4.00 mm), moisture-sensitive level 2, exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Unregulated 3–20 V supply; requires series R and bypass C for noise filtering |
| VSS | Ground reference | IC ground and negative terminal connection for lowest cell (Cell1–) |
| V1 | Cell1+ sense input | Differential input for bottom cell voltage (V1–VSS); requires RIN/CIN filter |
| V2 | Cell2+ sense input | Differential input for second cell (V2–V1); unused pins in 2S config must be shorted |
| V3 | Cell3+ sense input | Differential input for third cell (V3–V2); unused in 2S/3S configs per datasheet guidance |
| V4 | Cell4+ sense input | Differential input for top cell (V4–V3); unused in 2S/3S; short to adjacent Vx if not used |
| CD | Delay capacitor terminal | Charges to 1.5 V then discharges to trigger OUT; detects open/short faults |
| OUT | Fault signal output | N-channel open-drain, active-low - sinks current during OV; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-cell monitoring | Four differential inputs (V1–V4) enable true 2S–4S scalability without shared reference errors |
| Capacitor-programmed delay timer | 1–2 s delay with 0.1 µF CCD; K-factor 10–20 allows design flexibility without trimming |
| CD pin fault detection | Active detection of shorted or open CD capacitor ensures fail-safe OV response regardless of capacitor integrity |
| Customer Test Mode | CD pin grounded reduces delay to ≤170 ms - accelerates production-line functional testing |
| Ultra-low quiescent current | 1 µA ICC enables integration into low-power battery management systems without compromising runtime |
Applications
| Power Tools | e-Bikes |
|---|---|
Use Scenario: Cordless drill/driver battery packs with 2–4 Li-ion cells undergoing fast charging. IC Role / Device Role / Timing Role: Standalone overvoltage monitor that independently checks each cell and asserts fault signal before cell damage occurs. Use Value: Prevents thermal runaway by triggering pack disconnect within 2 seconds of OVP detection, using only passive RC components. |
Use Scenario: Mid-drive e-bike battery modules operating in wide ambient temperature ranges (–20°C to 60°C). IC Role / Device Role / Timing Role: Primary cell-level OVP protector interfacing with MCU-based BMS for redundancy and fast response. Use Value: Delivers ±10 mV OVP accuracy across temperature, ensuring safe charging even under varying cell aging profiles. |
| UPS Battery Backup | Light Electric Vehicles (LEVs) |
Use Scenario: Rack-mounted UPS systems using 3S Li-ion strings for data center backup power. IC Role / Device Role / Timing Role: Secondary hardware-level OVP guard that operates independently of firmware-controlled BMS. Use Value: Provides fail-safe protection with <100 nA per-cell leakage, minimizing standby drain on backup batteries. |
Use Scenario: Scooter and pedal-assist bicycle battery packs subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Robust, no-firmware OVP supervisor with extended temperature rating (–40°C to +110°C). Use Value: Maintains 50 mV hysteresis and stable 4.225 V threshold across full temp range, reducing false trips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar overvoltage protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ771601DPJR | Same 4.225 V OVP threshold and 50 mV hysteresis, but CMOS active-high output | Requires no external pull-up; incompatible with existing NCH-sink logic interfaces | Select when system logic expects active-high fault assertion and board layout lacks pull-up space |
| BQ771605DPJR | Lower 3.85 V OVP threshold and 250 mV hysteresis; same NCH open-drain output | Targeted for LFP or low-voltage Li-ion chemistries; not suitable for standard 4.2 V Li-ion cells | Choose only for non-standard cell chemistry requiring earlier trip point and wider hysteresis |
Compared with BQ771601DPJR and BQ771605DPJR, the BQ771602DPJR uniquely combines 4.225 V precision OVP, 50 mV hysteresis, and NCH open-drain output-making it optimal for cost-sensitive, space-constrained 2S–4S Li-ion packs needing external pull-up compatibility and minimal component count.
Availability
BQ771602DPJR is available at Aetrix Electronics and suitable for power tools, e-bikes, and UPS battery backup systems requiring stable component supply, long-lifecycle support, and automotive-grade temperature performance.
Supply support for BQ771602DPJR 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The BQ7716xx family is designed specifically for standalone, low-power overvoltage protection in multi-cell Li-ion battery packs-emphasizing precision, reliability, and minimal external component count.
FAQ
What is the overvoltage protection threshold of the BQ771602DPJR?
The BQ771602DPJR 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 –40°C to +110°C with drift specified up to ±54 mV at 110°C. The BQ771602DPJR does not support user-adjustable thresholds - it is optimized for standard 4.2 V nominal Li-ion cells.
Does the BQ771602DPJR require an external pull-up resistor on the OUT pin?
Yes, the BQ771602DPJR features an N-channel open-drain active-low output, so an external pull-up resistor to PACK+ or VDD is mandatory for proper logic-level signaling. The datasheet recommends a 100 kΩ pull-up for typical use, and the BQ771602DPJR can sink up to 14 mA when active, ensuring robust low-state drive under load.
Can the BQ771602DPJR be used in a 2-cell battery configuration?
Yes, the BQ771602DPJR supports 2-series (2S), 3-series (3S), and 4-series (4S) Li-ion configurations. For 2S operation, V3 and V4 pins must be shorted to V2 per TI's layout guidance in Figure 13. All four sense inputs remain functional, but only V1 and V2 are actively used - the BQ771602DPJR automatically ignores unused upper cells.
How is the overvoltage delay time set on the BQ771602DPJR?
The BQ771602DPJR uses an external capacitor on the CD pin to set the overvoltage delay. With a 0.1 µF capacitor, the delay is 1–2 seconds (K-factor 10–20). The BQ771602DPJR includes internal circuitry that charges CD to 1.5 V then discharges it; delay ends when CD falls below ~100 mV. Capacitor tolerance directly affects timing accuracy.
What is the supply voltage range for the BQ771602DPJR?
The BQ771602DPJR operates from VDD = 3 V to 20 V, covering full pack voltages for 2S (6–8.4 V), 3S (9–12.6 V), and 4S (12–16.8 V) Li-ion configurations, plus margin for transients. Its 1 µA quiescent current and –40°C to +110°C rating make the BQ771602DPJR suitable for both low-power and high-temperature applications.
BQ771602DPJR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- -
- Battery Chemistry:
- -
- Number of Cells:
- -
- Fault Protection:
- -
- Interface:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
BQ771602DPJR FAQ
1.How can I place an order for BQ771602DPJR through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ771602DPJR 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 BQ771602DPJR reliable?
The price and inventory of BQ771602DPJR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ771602DPJR is usually 5 days.
3.What payment methods are accepted for BQ771602DPJR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ771602DPJR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ771602DPJR?
BQ771602DPJR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ771602DPJR 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 BQ771602DPJR?
For technical support, including BQ771602DPJR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ771602DPJR requirements.
6.How does Aetrix verify that BQ771602DPJR is sourced from the original manufacturer or authorized distributors?
All BQ771602DPJR 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 BQ771602DPJR meets industry standards.
7.What is the process for return or replacement of BQ771602DPJR?
All BQ771602DPJR units undergo pre-shipment inspection (PSI). If there is an issue with BQ771602DPJR, 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 BQ771602DPJR part is unused and in its original packaging.
Return procedure for BQ771602DPJR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ771602DPJR 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…
