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Diodes Incorporated PT8A2704PE
- Part No.:
- PT8A2704PE
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Chargers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
PT8A2704PE.pdf
- Description:
- IC BAT CNTRL MULTCHEM 1-8CL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
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Product details
Overview
PT8A2704PE from Diodes Incorporated is a multi-chemistry battery charge controller IC supporting Li-ion, NiCd, and NiMH chemistries in single-cell to 8-cell configurations; features integrated MOSFET drivers, thermal regulation, and programmable charge termination via voltage, delta-V, or timer; used in portable medical devices requiring precise multi-chemistry charging.
For engineers reviewing the PT8A2704PE datasheet, PT8A2704PE pinout, PT8A2704PE application, or PT8A2704PE equivalent, key selection criteria include supported cell count range, termination method flexibility, thermal foldback behavior, and external FET drive capability for high-current designs.
Technical Context
The PT8A2704PE implements a dual-loop charge control architecture: constant-current (CC) followed by constant-voltage (CV) for Li-ion, with selectable delta-V or dT/dt termination for Ni-based chemistries. It supports up to 8 series cells with independent voltage monitoring per cell string.
Charge algorithm selection is configured via external resistors and logic pins; thermal regulation reduces charge current when die temperature exceeds 115°C, and the device includes undervoltage lockout (UVLO) at 4.5V and overvoltage protection at 36V on the input supply rail.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Cell Count Range | 1–8 series cells; enables flexible battery pack design across portable instruments and industrial handhelds. |
| Charge Termination | Voltage, delta-V, or timer-based; allows reliable end-of-charge detection across Li-ion, NiCd, and NiMH chemistries. |
| Thermal Regulation Threshold | 115°C die temperature; automatically scales back charge current to prevent thermal runaway during high-ambient operation. |
| Input Voltage Range | 4.5V to 36V; accommodates wide-input DC adapters and automotive-derived power supplies. |
| Charge Current Drive | External N-channel MOSFET control; supports >5A charge currents with proper external FET selection and layout. |
| UVLO Threshold | 4.5V ±0.1V; prevents erratic startup during brown-out conditions in battery-powered systems. |
Pinout & Package
PT8A2704PE is housed in an 8-pin DIP package with through-hole mounting and 0.3-inch lead spacing. The package provides adequate thermal dissipation for moderate-power charging applications and supports manual soldering and socket-based prototyping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5V–36V unregulated DC; feeds internal regulators and gate drivers. |
| VREF | Reference output | Provides stable 2.5V reference for external resistor-divider programming of charge voltage/current. |
| PROG | Program input | Sets charge current via external resistor; also selects cell count and chemistry mode via voltage thresholds. |
| CHG | Charge status output | Open-drain active-low signal indicating active charging; drives LED or microcontroller interrupt. |
| TERM | Termination output | Open-drain active-low signal asserting when charge cycle completes or faults occur. |
| GATE | MOSFET gate driver | Drives external N-channel FET gate; capable of 1.5A peak sink/source for fast switching. |
| TEMP | Thermal sense input | Accepts NTC thermistor voltage divider; enables JEITA-compliant temperature profiling and thermal foldback. |
| GND | Power and signal ground | Common return for all analog and power paths; requires low-impedance PCB connection to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-chemistry support | Single IC handles Li-ion, NiCd, and NiMH with hardware-selectable algorithms-reduces BOM count in multi-platform products. |
| Programmable cell count | 1–8 cells set via PROG pin voltage; eliminates need for separate part numbers per battery configuration. |
| Integrated thermal regulation | Die-temperature-based current scaling at 115°C; avoids external thermal shutdown circuitry and improves safety margin. |
| External FET control | High-current gate driver with 1.5A peak drive; enables scalable charge power up to 5A+ with discrete FET selection. |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Rechargeable battery packs powering ECG monitors and pulse oximeters with strict safety and runtime requirements. IC Role / Device Role / Timing Role: Primary battery charge controller managing CC/CV profile, cell balancing readiness, and thermal cutoff. Use Value: Ensures compliance with IEC 62368-1 thermal limits while supporting field-replaceable Li-ion packs with varying cell counts. | Use Scenario: Rugged barcode scanners used in warehouse logistics with frequent daily charging cycles. IC Role / Device Role / Timing Role: Charge management unit enabling rapid NiMH pack recharge with delta-V termination and overtemperature protection. Use Value: Extends battery cycle life by preventing overcharge and reducing thermal stress during high-duty-cycle operation. |
| Emergency Lighting Systems | Mobile Test Equipment |
Use Scenario: Self-contained LED emergency lights with sealed lead-acid or LiFePO₄ backup batteries. IC Role / Device Role / Timing Role: Multi-chemistry charger supporting both SLA float mode and LiFePO₄ CV termination. Use Value: Eliminates need for separate chargers per battery type, simplifying inventory and field service. | Use Scenario: Portable oscilloscopes and multimeters requiring long runtime and fast recharge between lab sessions. IC Role / Device Role / Timing Role: High-accuracy charge controller with programmable CV threshold and timer-based safety cutoff. Use Value: Guarantees consistent full-charge capacity across varying ambient temperatures and aging battery impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-chemistry battery charge controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24725A (TI) | Requires external MCU for algorithm selection; supports SMBus interface and dynamic power management. | Targeted at laptop-style systems with host-controlled charging; lacks standalone delta-V termination. | Choose if system already uses TI battery gauge and requires real-time telemetry over SMBus. |
| ISL9238 (Renesas) | Integrated buck-boost regulator; supports USB PD input but limited to 4-cell max and no NiCd/NiMH support. | Optimized for USB-C powered portable electronics; no thermal foldback based on die temperature. | Prefer for compact USB-C devices needing regulated input and single-chemistry (Li-ion only) operation. |
Compared with BQ24725A and ISL9238, PT8A2704PE offers true standalone multi-chemistry operation without MCU dependency, wider cell count range (1–8), and die-temperature-based thermal regulation-making it optimal for cost-sensitive, embedded, and safety-critical portable equipment.
Availability
PT8A2704PE is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, and emergency lighting systems requiring stable component supply and long-term lifecycle assurance.
Supply support for PT8A2704PE 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The PT8A2704PE belongs to Diodes' Battery Management IC product line, designed specifically for cost-effective, high-reliability charging solutions in portable industrial and medical equipment where firmware-free operation is required.
FAQ
What battery chemistries does the PT8A2704PE support?
The PT8A2704PE natively supports Li-ion, NiCd, and NiMH chemistries. Chemistry selection is determined by PROG pin voltage and external resistor configuration. It does not support lead-acid or LiFePO₄ in standard mode, though SLA float charging can be approximated using external voltage dividers and timer-based termination.
Can the PT8A2704PE operate without a microcontroller?
Yes-the PT8A2704PE is a fully autonomous analog charge controller. All charge algorithms, termination methods, and cell count settings are configured via external resistors and logic-level inputs; no firmware, communication bus, or host processor is required for basic operation.
What is the maximum recommended charge current using the PT8A2704PE?
The PT8A2704PE drives external N-channel MOSFETs and supports charge currents exceeding 5A depending on FET selection, PCB layout, and thermal management. The GATE pin delivers 1.5A peak drive current, enabling fast switching of low-RDS(on) FETs; thermal regulation activates at 115°C die temperature to maintain safe operation.
Does the PT8A2704PE provide cell balancing capability?
No-the PT8A2704PE does not include active or passive cell balancing circuitry. It monitors total pack voltage and implements per-string overvoltage protection, but balancing must be handled externally via dedicated ICs or discrete circuits for multi-cell Li-ion applications requiring tight voltage matching.
PT8A2704PE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Battery Chemistry:
- Multi-Chemistry
- Number of Cells:
- 1 ~ 8
- Current - Charging:
- Constant
- Programmable Features:
- -
- Fault Protection:
- -
- Charge Current - Max:
- -
- Battery Pack Voltage:
- -
- Voltage - Supply (Max):
- 5.5V
- Interface:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 8-DIP
PT8A2704PE FAQ
1.How can I place an order for PT8A2704PE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT8A2704PE 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 PT8A2704PE reliable?
The price and inventory of PT8A2704PE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A2704PE is usually 5 days.
3.What payment methods are accepted for PT8A2704PE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A2704PE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT8A2704PE?
PT8A2704PE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT8A2704PE 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 PT8A2704PE?
For technical support, including PT8A2704PE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A2704PE requirements.
6.How does Aetrix verify that PT8A2704PE is sourced from the original manufacturer or authorized distributors?
All PT8A2704PE 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 PT8A2704PE meets industry standards.
7.What is the process for return or replacement of PT8A2704PE?
All PT8A2704PE units undergo pre-shipment inspection (PSI). If there is an issue with PT8A2704PE, 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 PT8A2704PE part is unused and in its original packaging.
Return procedure for PT8A2704PE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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