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Texas Instruments BQ2031PN-A5G4
- Part No.:
- BQ2031PN-A5G4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
BQ2031PN-A5G4.pdf
- Description:
- IC BATT CHG LEAD ACID 1CEL 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
BQ2031PN-A5G4 from Texas Instruments is a lead-acid battery fast-charge IC designed for constant-voltage, constant-current, and pulsed-current charging control. It features pin-selectable algorithms (Two-Step Voltage, Two-Step Current, Pulsed Current), temperature-compensated voltage reference (−3.9 mV/°C), and integrated LED status outputs. It supports 16-pin PDIP packaging and operates across −20°C to +70°C for industrial UPS and backup power systems.
For engineers reviewing the BQ2031PN-A5G4 datasheet, BQ2031PN-A5G4 pinout, BQ2031PN-A5G4 application, or BQ2031PN-A5G4 equivalent, key selection considerations include its programmable charge termination (Δ2V, min current, max voltage, time-out), pre-charge qualification logic, PWM-based MOD output for switch-mode regulation, and direct LED drive capability for real-time charge state indication.
Technical Context
The BQ2031PN-A5G4 implements a dual-loop PWM regulator with independent voltage (BAT/VCOMP) and current (SNS/ICOMP) feedback paths, enabling precise constant-current and constant-voltage regulation. Its internal temperature-compensated 2.20 V reference (±1% at 25°C) governs all voltage thresholds, including VBLK, VFLT, and VLTF.
Charge algorithm selection is determined by QSEL/TSEL logic states, while termination criteria-including Δ2V accumulation (−8 mV threshold), IMIN thresholds set via IGSEL (IMAX/10 to IMAX/30), and MTO timing (1–24 hrs via TMTO R-C network)-are algorithm-specific and validated per Table 1 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 4.5 V to 5.5 V - powers internal circuitry and enables operation only within this regulated range |
| Operating Temp | −20°C to +70°C - commercial-grade ambient range suitable for indoor UPS and telecom backup systems |
| Reference Voltage | 2.20 V ±1% at 25°C, −3.9 mV/°C TC - ensures accurate, temperature-adaptive voltage thresholding for VBLK/VFLT |
| Current Sense | 0.250 V at SNS - sets IMAX = 0.250 V / RSNS, enabling precise current regulation up to ~5 A with 50 mΩ sense resistor |
| PWM Frequency | Configurable up to 100 kHz via CPWM on TPWM - supports high-efficiency switch-mode designs with minimal external component count |
| Charge Termination | Multiple modes: Δ2V ≤ −8 mV (Two-Step Current), IMIN = IMAX/10–IMAX/30 (Two-Step Voltage), VCELL ≥ VBLK (Pulsed Current) - provides robust, chemistry-aligned end-of-charge detection |
| Maintenance Mode | Temperature-compensated float regulation (VFLT) or pulsed average current (ICOND = IMAX/5) - sustains battery capacity without overcharge risk |
Pinout & Package
Package: 16-pin narrow plastic DIP (PDIP-N), 0.300" width, RoHS-compliant NIPDAU finish, MSL not applicable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BAT | Battery voltage sense input | High-impedance (50 MΩ) node for scaled battery pack voltage; used for bulk/float regulation and qualification |
| SNS | Current sense input | Measures voltage drop across external sense resistor (RSNS) to regulate IMAX and IMIN with 0.250 V reference |
| TS | Temperature sense input | Accepts thermistor divider voltage (0.4–0.6 × VCC) to enforce thermal safety limits (LTF/TCO/HTF) |
| MOD | PWM switching control output | Push-pull, 5 mA sink/source capable output driving external MOSFET gate; 0–80% duty cycle modulation |
| LED1–LED3 | Charge status display outputs | Tri-state capable drivers supporting three user-selectable display modes (DSEL-configured) for fault, bulk, float, and pending states |
| QSEL/TSEL/DSEL | Algorithm and display configuration inputs | Three-state logic pins (pull-up/pull-down/floating) latched at power-up or battery insertion to select charge mode and LED behavior |
Key Features
| Feature | Design Value |
|---|---|
| Pre-charge qualification | Detects open/shorted/damaged cells via two-stage test (VFLT+0.25V → ICOND), preventing unsafe high-current application |
| Pin-selectable algorithms | Three distinct charge profiles-Two-Step Voltage (CV/CV), Two-Step Current (CC/CC), Pulsed Current (hysteretic)-selected without firmware |
| Temperature-compensated thresholds | All voltage limits (VBLK, VFLT, VLTF, VHTF, VTCO) scale with ambient using internal −3.9 mV/°C reference, matching lead-acid voltage vs. temp curves |
| Direct LED status interface | Integrated tri-state drivers (LED1–LED3 + COM) eliminate external driver ICs; support flash, steady-on, and blank states per Table 2 |
| Robust fault handling | Automatic transition to Fault state on battery absence, overvoltage, or qualification failure; requires VCC cycle or battery reinsertion to reset |
Applications
| Uninterruptible Power Supplies (UPS) | Telecom Backup Systems |
|---|---|
Use Scenario: Maintaining standby 12 V/24 V lead-acid batteries in line-interactive UPS units during grid outages. IC Role / Device Role / Timing Role: Primary charge controller managing bulk, absorption, and float phases with automatic thermal derating and cell health verification. Use Value: Prevents premature battery failure via pre-charge qualification and temperature-compensated VFLT, extending service life beyond 3 years in cyclic use. |
Use Scenario: Charging sealed lead-acid (SLA) batteries in remote cellular base station cabinets exposed to ambient temperature swings. IC Role / Device Role / Timing Role: Lead-acid charge manager enforcing LTF/TCO cutoffs and Δ2V termination to avoid undercharging in cold environments or overcharging in hot enclosures. Use Value: Enables reliable 24/7 operation without manual intervention by adapting float voltage and current limits to real-time battery temperature. |
| Emergency Lighting Systems | Industrial Control Panel Batteries |
Use Scenario: Recharging SLA batteries powering exit signs and egress lighting after discharge events. IC Role / Device Role / Timing Role: Autonomous charger executing Two-Step Voltage algorithm with MTO timeout fallback to ensure full recovery within 8 hours. Use Value: Guarantees compliance with NFPA 101 emergency lighting runtime requirements via verified maintenance current (ICOND) and fault-safe shutdown. |
Use Scenario: Maintaining backup power for PLC and HMI real-time clocks and SRAM during factory power interruptions. IC Role / Device Role / Timing Role: Low-maintenance float charger using Pulsed Current algorithm to minimize grid energy draw while preserving battery capacity. Use Value: Reduces self-discharge-induced capacity loss by >40% compared to fixed-voltage float, verified via ICOND pulse averaging per Equation 7. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar lead-acid battery charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments BQ2031SN-A5 | Identical functionality and pinout; SOIC-16 package instead of PDIP-16; MSL Level-1 rating for surface-mount assembly | Preferred for automated PCB assembly; same thermal performance but lower profile and no through-hole mounting | Select BQ2031SN-A5 when board space is constrained or reflow soldering is required; electrical behavior is identical to BQ2031PN-A5G4 |
| Analog Devices LTC4000-1 | Wide-input buck-boost controller with external FETs; supports Li-ion/Pb-acid; no integrated LED drivers or pre-qual logic | Used in multi-chemistry systems requiring programmable termination and higher efficiency (>92%) at >5 A | Choose LTC4000-1 only if designing for mixed-chemistry battery banks or needing >10 A charge current; lacks BQ2031PN-A5G4's plug-and-play Pb-acid optimization |
Compared with BQ2031PN-A5G4, BQ2031SN-A5 offers identical charge control intelligence in a surface-mount package, while LTC4000-1 provides greater flexibility across chemistries at the cost of increased external component count and loss of integrated diagnostics and LED status.
Availability
BQ2031PN-A5G4 is available at Aetrix Electronics and suitable for uninterruptible power supplies, telecom backup systems, emergency lighting, and industrial control panel batteries requiring stable component supply and long-term lifecycle support.
Supply support for BQ2031PN-A5G4 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 power conversion and battery management.
The BQ2031PN-A5G4 belongs to TI's dedicated lead-acid charge controller product line, engineered specifically to replace discrete charge circuits with single-chip solutions that enforce battery manufacturer voltage/current recommendations and thermal safety limits.
FAQ
What charge algorithms does the BQ2031PN-A5G4 support?
The BQ2031PN-A5G4 supports three pin-selectable charge algorithms: Two-Step Voltage (constant-current followed by constant-voltage), Two-Step Current (constant-current bulk then pulsed-maintenance), and Pulsed Current (hysteretic on-demand pulsing). Selection is made via QSEL and TSEL logic states per Table 1 in the datasheet, and each algorithm defines unique termination and maintenance behaviors confirmed for BQ2031PN-A5G4.
How does the BQ2031PN-A5G4 handle battery temperature monitoring?
The BQ2031PN-A5G4 monitors battery temperature via the TS pin using an external NTC thermistor divider network. It enforces configurable low-temperature fault (VLTF = 0.6 × VCC), temperature cutoff (VTCO = 0.4 × VCC), and high-temperature fault (VHTF = 0.44 × VCC) thresholds. Charging is suspended outside these limits and resumes automatically when temperature returns to range, with timers suspended-not reset-during the Charge Pending state.
What is the function of the MOD pin on the BQ2031PN-A5G4?
The MOD pin on the BQ2031PN-A5G4 is a push-pull PWM output that directly drives the gate of an external N-channel MOSFET to regulate charging current. It operates with 0–80% duty cycle modulation at frequencies up to 100 kHz (set by CPWM on TPWM), enabling high-efficiency switch-mode regulation. MOD sinks or sources up to 5 mA and is active only during valid charge states-disabled during Fault or Charge Pending.
Can the BQ2031PN-A5G4 be used with lithium-ion batteries?
No-the BQ2031PN-A5G4 is explicitly designed and characterized for lead-acid battery chemistry only. Its voltage thresholds (e.g., VBLK, VFLT), termination algorithms (Δ2V, IMIN scaling), and temperature compensation profile align with lead-acid specifications. Using it with lithium-ion batteries risks overvoltage, thermal runaway, or failure to terminate, as the BQ2031PN-A5G4 lacks CC/CV sequencing, cell balancing, or Li-ion-specific safety timers.
How is fast-charge termination implemented in the BQ2031PN-A5G4?
Fast-charge termination in the BQ2031PN-A5G4 depends on the selected algorithm: Two-Step Voltage uses minimum current (IMIN, set by IGSEL); Two-Step Current uses second difference of cell voltage (Δ2V ≤ −8 mV); Pulsed Current uses maximum voltage (VCELL ≥ VBLK). All methods include hold-off periods (0.15 × tMTO) and are validated per the BQ2031PN-A5G4 datasheet's functional description and Table 1.
BQ2031PN-A5G4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Battery Chemistry:
- Lead Acid
- Number of Cells:
- 1
- Current - Charging:
- Constant, Pulsed
- Programmable Features:
- Current, Timer, Voltage
- Fault Protection:
- Over Temperature, Over Voltage
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- -20°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
BQ2031PN-A5G4 FAQ
1.How can I place an order for BQ2031PN-A5G4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ2031PN-A5G4 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 BQ2031PN-A5G4 reliable?
The price and inventory of BQ2031PN-A5G4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ2031PN-A5G4 is usually 5 days.
3.What payment methods are accepted for BQ2031PN-A5G4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ2031PN-A5G4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ2031PN-A5G4?
BQ2031PN-A5G4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ2031PN-A5G4 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 BQ2031PN-A5G4?
For technical support, including BQ2031PN-A5G4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ2031PN-A5G4 requirements.
6.How does Aetrix verify that BQ2031PN-A5G4 is sourced from the original manufacturer or authorized distributors?
All BQ2031PN-A5G4 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 BQ2031PN-A5G4 meets industry standards.
7.What is the process for return or replacement of BQ2031PN-A5G4?
All BQ2031PN-A5G4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ2031PN-A5G4, 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 BQ2031PN-A5G4 part is unused and in its original packaging.
Return procedure for BQ2031PN-A5G4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ2031PN-A5G4 Tags
-
BQ21040DBVR
Texas Instruments
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MCP73812T-420I/OT
Microchip Technology
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MCP73831T-2ACI/OT
Microchip Technology
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MCP73832T-2DCI/OT
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MCP73831T-2ATI/OT
Microchip Technology
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MCP73832T-2ATI/OT
Microchip Technology
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MCP73831T-5ACI/OT
Microchip Technology
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MCP73832T-2ACI/MC
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MCP73831T-2ACI/MC
Microchip Technology
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