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Texas Instruments BQ24004PWPG4
- Part No.:
- BQ24004PWPG4
- Manufacturer:
- Texas Instruments
- Category:
- Battery Chargers
- Package:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
BQ24004PWPG4.pdf
- Description:
- IC BATT CHG LI-ION 2CEL 20HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,309
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Product details
Overview
BQ24004PWPG4 from Texas Instruments is a two-cell Li-ion linear charge management IC with integrated P-channel FET pass transistor, reverse-blocking Schottky diode, and thermal protection. It delivers ±1% voltage regulation accuracy, up to 1.2-A continuous charge current, and programmable 8.2-V/8.4-V charge voltage for coke or graphite anodes - used in space-constrained PDAs and internet appliances.
For engineers reviewing the BQ24004PWPG4 datasheet, BQ24004PWPG4 pinout, BQ24004PWPG4 application, or BQ24004PWPG4 equivalent, key selection considerations include its single-LED status output configuration, 20-pin HTSSOP PowerPAD™ package, preconditioning timer safety, and thermistor-based temperature qualification before fast charge.
Technical Context
The BQ24004PWPG4 implements a three-phase charging algorithm: preconditioning (low-current precharge below 5.75 V), constant-current regulation (set by external RSNS), and constant-voltage regulation (8.2 V or 8.4 V per 2-cell pack). Charge termination occurs via either minimum taper current detection (12–25 mV across RSNS) or 22.5-minute safety timer.
It integrates analog comparators for input UVLO (8.75–9.0 V start), overvoltage (8.85–9.15 V), high-voltage recharge (7.7–8.0 V), and APG/THERM monitoring (0.545–1.515 V thresholds) - all supporting battery conditioning and thermal fault response without host processor intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Voltage | 8.2 V or 8.4 V (selectable via VSEL pin); supports both coke and graphite anode chemistries in 2-cell Li-ion packs. |
| Max Continuous Current | 1.2 A (regulated via external sense resistor RSNS; 0.083–1.0 Ω range). |
| Voltage Regulation Accuracy | ±1% over –40°C to 125°C junction temperature and 8.4–10 V supply range. |
| Precharge Current | 40–80 mA (active when VSENSE < 5.75 V; prevents damage to deeply discharged cells). |
| Charge Termination | Min current threshold (12–25 mV across RSNS) + 22.5-min timer; no software dependency required. |
| Thermal Shutdown | 165°C trip with 10°C hysteresis; automatically resumes when junction cools to 155°C. |
| Operating Junction Temp | –40°C to 125°C; validated for industrial ambient (–20°C to 70°C) per BQ24004PWPG4 ordering spec. |
Pinout & Package
Package: 20-pin HTSSOP PowerPAD™ (PWP) with exposed thermal pad; requires PCB copper pour and thermal vias for 3.238 W power dissipation at TA ≤25°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (2,3) | Input voltage supply | Accepts 8.4–10 V DC input; powers internal circuitry and charges battery via integrated P-FET. |
| OUT (18,19) | Charge current output | Drives battery through integrated P-channel MOSFET; reverse-blocking Schottky prevents backfeed. |
| VSENSE (17) | Battery voltage feedback | Direct connection to battery+ enables accurate regulation; internal 10-kΩ pullup to OUT enhances safety. |
| ISNS (5) | Current sense input | Measures voltage drop across external RSNS to regulate charge current; 0.1 V nominal threshold. |
| STAT1 (14) | Status output (open-drain) | Single LED drive: ON (low) during precharge/fast charge; flashing (1 Hz) on fault; OFF (high) at done/sleep. |
| EN (8) | Enable control input | Active-high logic with internal 100–200 kΩ pulldown; places device in 1 µA standby when low. |
| VSEL (9) | Voltage select input | Logic-high = 8.4 V regulation; logic-low = 8.2 V; must not be left floating per datasheet. |
| GND/HEATSINK (10) | Ground & thermal interface | Must connect to PCB thermal pad; primary heat path to board; critical for thermal shutdown margin. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated FET Pass Transistor | P-channel MOSFET with built-in reverse-blocking Schottky eliminates need for external diode and reduces BOM count. |
| Programmable Charge Voltage | 8.2 V or 8.4 V per 2-cell pack via VSEL pin - matches industry-standard Li-ion voltage profiles for coke/graphite anodes. |
| Preconditioning Safety Timer | 22.5-minute hard limit on low-current precharge phase - prevents indefinite charging of damaged or deeply depleted batteries. |
| Thermal Protection with Hysteresis | 165°C shutdown / 155°C recovery ensures safe operation under sustained high-power dissipation without latch-up. |
| Low-Power Sleep Mode | 1 µA quiescent current when EN is low - preserves system battery during storage or standby. |
Applications
| Handheld Internet Appliances | Portable Digital Assistants (PDAs) |
|---|---|
|
Use Scenario: Compact internet appliance with dual-cell Li-ion battery requiring autonomous, space-efficient charging without MCU supervision. IC Role / Device Role / Timing Role: Standalone linear charger managing full CC/CV profile, preconditioning, and status indication via single LED. Use Value: Eliminates need for external FET, diode, and discrete comparators - reduces PCB area by >30% versus discrete solutions. |
Use Scenario: Legacy PDA design needing reliable, low-noise charging for aging 2-cell Li-ion packs with graphite anodes. IC Role / Device Role / Timing Role: Voltage- and current-regulated charger with 8.4-V setpoint, thermal foldback, and 3-hour total charge timer (TMR SEL floating). Use Value: ±1% voltage accuracy maintains cell longevity; integrated thermal shutdown prevents field failures in sealed enclosures. |
| MP3 Audio Players | Digital Still Cameras |
|
Use Scenario: Battery-powered MP3 player with tight thermal constraints and requirement for visual charge status. IC Role / Device Role / Timing Role: Single-LED status driver (STAT1) indicating precharge, fast charge, done, and fault states with distinct blink patterns. Use Value: Reduces firmware overhead - no polling or GPIO handling needed for basic charge state reporting. |
Use Scenario: DSLR or mirrorless camera accessory battery charger operating from USB-derived 9-V input. IC Role / Device Role / Timing Role: Input voltage qualification via APG/THERM pin; blocks charge if adapter drops below 8.75 V (UVLO) or exceeds 9.15 V (OVLO). Use Value: Prevents unsafe charging from unstable wall adapters - avoids overvoltage stress on sensitive imaging sensors and memory. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Li-ion charge management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24005PWPG4 | Two independent open-drain STAT outputs (STAT1 red, STAT2 green); same pinout and electrical specs. | Supports dual-color LED or separate fault/done signaling; requires additional LED driver traces. | Select when discrete status indication (e.g., red=charging, green=done) is preferred over single-LED simplicity. |
| BQ24075TRGTR | 3.3-V bias rail support, higher 1.5-A max current, I2C interface, and 16-pin QFN package - no PowerPAD. | Enables host-controlled charge parameters and dynamic voltage/current adjustment; lacks integrated thermal pad. | Select when system-level charge policy flexibility or lower profile is prioritized over autonomous operation and thermal robustness. |
Compared with BQ24004PWPG4, BQ24005PWPG4 adds dual-status signaling without changing core charging behavior, while BQ24075TRGTR trades autonomy and thermal performance for programmability and smaller footprint - making each suitable for distinct integration priorities.
Availability
BQ24004PWPG4 is available at Aetrix Electronics and suitable for handheld internet appliances, portable digital assistants, and MP3 players requiring stable component supply with industrial temperature range support and long-lifecycle availability.
Supply support for BQ24004PWPG4 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 energy-efficient electronics.
The BQ24004PWPG4 belongs to TI's bq2400x family of highly integrated Li-ion linear chargers - designed specifically for space-constrained, autonomous charging in consumer portable devices without host processor dependency.
FAQ
What is the function of the VSEL pin on the BQ24004PWPG4?
The VSEL pin on the BQ24004PWPG4 selects the final charge regulation voltage: logic-low sets 8.2 V for coke-anode cells, and logic-high sets 8.4 V for graphite-anode cells. The pin must be actively driven - leaving it floating violates the datasheet and may cause undefined regulation behavior. This selection directly determines the per-cell voltage compliance point during constant-voltage charging.
Does the BQ24004PWPG4 support thermistor-based temperature monitoring?
Yes, the BQ24004PWPG4 supports thermistor-based temperature monitoring via the APG/THERM pin, which accepts a voltage divider formed by an NTC or PTC thermistor and external resistors. The device compares this voltage against internal thresholds (0.545–1.515 V) to suspend charging outside user-defined temperature limits - a mandatory safety feature for certified Li-ion battery systems.
How does the BQ24004PWPG4 terminate charging?
The BQ24004PWPG4 terminates charging using dual criteria: (1) detection of taper current falling below 12–25 mV across the sense resistor (indicating near-full charge), and (2) expiration of the 22.5-minute safety timer. Both conditions trigger automatic transition to DONE state, turning off STAT1 and entering low-power sleep mode - no external controller is required.
What is the maximum input voltage the BQ24004PWPG4 can accept?
The BQ24004PWPG4 has an absolute maximum input voltage rating of 13.5 V on the IN pins, but its recommended operating input voltage range is 8.4 V to 10 V. Operation above 10 V risks exceeding thermal limits and violating the 3.238 W package power rating - especially without adequate PCB copper pour and thermal vias beneath the PowerPAD™.
Is the BQ24004PWPG4 RoHS-compliant and lead-free?
Yes, the BQ24004PWPG4 is RoHS-compliant and features NiPdAu (NIPDAU) lead finish per TI's Package Option Addendum. It carries MSL Level-2-260°C-1 Year moisture sensitivity rating and is qualified for reflow soldering at peak temperatures up to 260°C - meeting IPC/JEDEC J-STD-020 standards for lead-free assembly.
BQ24004PWPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Battery Chemistry:
- Lithium Ion
- Number of Cells:
- 2
- Current - Charging:
- Constant
- Programmable Features:
- Current, Timer
- Fault Protection:
- Over Temperature
- Charge Current - Max:
- 1.2A
- Battery Pack Voltage:
- 8.4V
- Voltage - Supply (Max):
- 10V
- Interface:
- -
- Operating Temperature:
- -40°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-HTSSOP
BQ24004PWPG4 FAQ
1.How can I place an order for BQ24004PWPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for BQ24004PWPG4 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 BQ24004PWPG4 reliable?
The price and inventory of BQ24004PWPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for BQ24004PWPG4 is usually 5 days.
3.What payment methods are accepted for BQ24004PWPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for BQ24004PWPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for BQ24004PWPG4?
BQ24004PWPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your BQ24004PWPG4 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 BQ24004PWPG4?
For technical support, including BQ24004PWPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your BQ24004PWPG4 requirements.
6.How does Aetrix verify that BQ24004PWPG4 is sourced from the original manufacturer or authorized distributors?
All BQ24004PWPG4 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 BQ24004PWPG4 meets industry standards.
7.What is the process for return or replacement of BQ24004PWPG4?
All BQ24004PWPG4 units undergo pre-shipment inspection (PSI). If there is an issue with BQ24004PWPG4, 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 BQ24004PWPG4 part is unused and in its original packaging.
Return procedure for BQ24004PWPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
BQ24004PWPG4 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-2ACI/OT
Microchip Technology
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MCP73831T-2DCI/OT
Microchip Technology
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MCP73832T-2DCI/OT
Microchip Technology
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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
Microchip Technology
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MCP73831T-2ACI/MC
Microchip Technology
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MCP73831T-2ATI/MC
Microchip Technology
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