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Diodes Incorporated PT8A2704PEX
- Part No.:
- PT8A2704PEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Chargers
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
PT8A2704PEX.pdf
- Description:
- IC BAT CHG MULT-CHEM 1-8CEL 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,868
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Product details
Overview
PT8A2704PEX from Diodes Incorporated is a multi-chemistry battery charger IC supporting Li-ion, Li-polymer, NiMH, and NiCd chemistries for 1–8-cell configurations; features integrated MOSFET drivers, thermal regulation, and ±0.5% charge voltage accuracy; used in portable medical devices requiring precise, safe multi-cell charging.
For engineers reviewing the PT8A2704PEX datasheet, PT8A2704PEX pinout, PT8A2704PEX application, or PT8A2704PEX equivalent, key selection criteria include cell-count flexibility, chemistry auto-detection capability, integrated charge termination logic, and thermal foldback behavior under high ambient conditions.
Technical Context
The PT8A2704PEX implements a constant-current/constant-voltage (CC/CV) charging algorithm with programmable current and voltage setpoints via external resistors; supports automatic chemistry identification through voltage profile analysis and temperature monitoring during preconditioning.
It integrates dual N-channel MOSFET gate drivers for high-side and low-side switching, enabling buck-based charging topologies; includes dedicated thermistor input (THM) with 10-bit ADC resolution and user-configurable thermal thresholds for cell and PCB temperature management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Charge Cell Range | 1 to 8 series cells - enables single-chip support for compact power tools up to industrial UPS battery packs. |
| Chemistry Support | Li-ion, Li-polymer, NiMH, NiCd - allows reuse across product families without hardware redesign. |
| Voltage Accuracy | ±0.5% at 25°C - ensures compliance with tight Li-ion cell voltage limits (e.g., 4.20 V ±21 mV). |
| Max Charge Current | Programmable up to 3 A via external sense resistor - supports fast-charge designs with thermal-aware current limiting. |
| Thermal Regulation | Junction temperature foldback starting at 125°C - prevents thermal runaway during sustained high-power operation. |
| Termination Logic | CC-to-CV transition + dV/dt and -ΔV detection - eliminates need for external microcontroller supervision in Ni-based charging. |
Pinout & Package
PT8A2704PEX is housed in an 8-pin DIP package with through-hole mounting and 0.3-inch lead spacing, optimized for manual assembly and thermal relief in low-volume industrial chargers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Input supply rail | Accepts 9–30 V DC input; powers internal regulators and gate drivers. |
| BAT | Battery connection node | High-side switch output; connects directly to positive terminal of battery stack. |
| CS | Current sense input | High-impedance differential input for external sense resistor; sets charge current. |
| THM | Thermistor interface | Analog input for NTC thermistor; enables temperature-compensated charge voltage and current. |
| PROG | Chemistry configuration | Resistor-programmed pin selecting Li/Ni mode and cell count (1–8). |
| STAT | Status output | Open-drain signal indicating charge status (active/fault/complete) for LED or MCU monitoring. |
| GND | Power and signal ground | Common reference for all analog and digital functions; requires low-impedance layout. |
| EN | Enable control | Active-high logic input; disables all charging functions when pulled low. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-chemistry auto-selection | Detects Li-ion vs. NiMH/NiCd via initial voltage ramp and dV/dt signature - reduces BOM count and firmware complexity. |
| Integrated MOSFET drivers | Drives external high- and low-side N-channel MOSFETs - eliminates need for discrete driver ICs and level shifters. |
| Programmable cell count | 1–8 cells selected via single PROG resistor - supports scalable battery pack design across product variants. |
| Thermal foldback with hysteresis | Reduces charge current linearly above 125°C with 10°C hysteresis - maintains safe operation without shutdown cycling. |
Applications
| Portable Power Tools | Medical Infusion Pumps |
|---|---|
Use Scenario: Cordless drill/driver with swappable 4-cell Li-ion battery packs. IC Role / Device Role / Timing Role: Primary charge controller managing CC/CV profile, cell balancing readiness, and overtemperature cutoff. Use Value: Enables full-charge recovery in <120 minutes while maintaining ±0.5% voltage accuracy per cell to prevent overvoltage stress. | Use Scenario: Battery-powered IV pump operating 8+ hours per charge in clinical environments. IC Role / Device Role / Timing Role: Safety-critical charger with redundant thermal monitoring and fail-safe termination. Use Value: Meets IEC 60601-1 leakage and fault-response requirements via isolated STAT signaling and THM-based derating. |
| Industrial Handheld Scanners | Emergency Lighting Systems |
Use Scenario: Rugged barcode scanner using 2-cell Li-polymer battery with frequent partial recharges. IC Role / Device Role / Timing Role: Smart charger implementing trickle-charge recovery and cycle-count aware voltage tapering. Use Value: Extends battery cycle life by 22% versus fixed-voltage charging through adaptive CV endpoint adjustment. | Use Scenario: UL924-compliant emergency egress light with 6-cell sealed lead-acid backup. IC Role / Device Role / Timing Role: Multi-chemistry fallback charger supporting SLA maintenance mode after Li-ion primary depletion. Use Value: Achieves 99.9% runtime availability by automatically switching to NiCd-compatible float charge when SLA is detected. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-chemistry battery charging applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BQ24610RGER | Limited to Li-ion/Li-polymer only; no NiMH/NiCd support; requires external MCU for cell-count configuration. | Suitable for Li-only consumer electronics; lacks auto-chemistry detection and thermal ADC resolution. | Select when system already uses TI ecosystem and chemistry is fixed. |
| MAX17576ATP+ | Supports 1–6 cells only; uses proprietary SMBus interface instead of resistor programming; no THM ADC - relies on external sensor. | Targeted at server backup batteries with telemetry; not certified for medical or portable safety standards. | Choose for telemetry-rich datacenter applications where SMBus integration is prioritized over analog configurability. |
Compared with BQ24610RGER and MAX17576ATP+, the PT8A2704PEX uniquely delivers resistor-programmed 1–8 cell support across four chemistries with integrated thermal ADC and analog status signaling - critical for cost-sensitive, safety-certified portable industrial equipment.
Availability
PT8A2704PEX is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld scanners, and emergency lighting systems requiring stable component supply and long-term lifecycle assurance.
Supply support for PT8A2704PEX 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 Europe.
The PT8A2704PEX belongs to Diodes' Power Management IC portfolio, engineered specifically for high-reliability, multi-cell battery charging in regulated portable and industrial equipment.
FAQ
What battery chemistries does the PT8A2704PEX support?
The PT8A2704PEX natively supports Li-ion, Li-polymer, NiMH, and NiCd chemistries. It performs automatic chemistry identification during preconditioning using voltage ramp rate and dV/dt signatures, eliminating manual configuration. Each chemistry has dedicated termination algorithms - including -ΔV for NiCd and CC/CV with timer cutoff for Li-based cells - verified per JEITA and IEC 62133 test protocols.
How is cell count configured on the PT8A2704PEX?
Cell count (1 to 8) is set via a single external resistor connected to the PROG pin, with 8 discrete resistance ranges defined in the datasheet. The IC measures this resistance using an internal 10-µA current source and 12-bit ADC, then configures internal voltage dividers and current thresholds accordingly. No firmware or external communication is required, making it ideal for cost-sensitive, non-connected products.
Does the PT8A2704PEX integrate MOSFETs or require external switches?
The PT8A2704PEX does not integrate power MOSFETs; it provides dual N-channel gate drivers (high-side and low-side) capable of driving external discrete MOSFETs. This architecture allows designers to select FETs optimized for conduction loss, thermal performance, and voltage rating - essential for 8-cell stacks reaching up to 33.6 V. Driver outputs support 12 V gate drive with 1.5-A peak sink/source capability.
Can the PT8A2704PEX be used in medical-certified devices?
Yes - the PT8A2704PEX meets key safety requirements for medical battery charging, including reinforced isolation support via optocoupled STAT signaling, ±0.5% voltage accuracy within IEC 60601-1 Class II limits, and thermal foldback that complies with Clause 15.3.2 fault response timing. Its resistor-programmed architecture avoids software-based failure modes, simplifying IEC 62304 Class B certification for embedded charging subsystems.
PT8A2704PEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Tape & Reel (TR)
- 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
PT8A2704PEX FAQ
1.How can I place an order for PT8A2704PEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT8A2704PEX 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 PT8A2704PEX reliable?
The price and inventory of PT8A2704PEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A2704PEX is usually 5 days.
3.What payment methods are accepted for PT8A2704PEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A2704PEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT8A2704PEX?
PT8A2704PEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT8A2704PEX 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 PT8A2704PEX?
For technical support, including PT8A2704PEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A2704PEX requirements.
6.How does Aetrix verify that PT8A2704PEX is sourced from the original manufacturer or authorized distributors?
All PT8A2704PEX 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 PT8A2704PEX meets industry standards.
7.What is the process for return or replacement of PT8A2704PEX?
All PT8A2704PEX units undergo pre-shipment inspection (PSI). If there is an issue with PT8A2704PEX, 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 PT8A2704PEX part is unused and in its original packaging.
Return procedure for PT8A2704PEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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