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Diodes Incorporated PT8A2704WEX
- Part No.:
- PT8A2704WEX
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Chargers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PT8A2704WEX.pdf
- Description:
- IC BAT CHG MULT-CHEM 1-8CL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,166
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Product details
Overview
PT8A2704WEX from Diodes Incorporated is a multi-chemistry battery charger IC supporting Li-ion, Li-polymer, NiMH, and NiCd chemistries in single-to-8-cell configurations; delivers up to 2A charge current with ±0.5% voltage regulation accuracy and integrated thermal foldback; used in portable medical devices, industrial handhelds, and ruggedized test equipment.
For engineers reviewing the PT8A2704WEX datasheet, PT8A2704WEX pinout, PT8A2704WEX application, or PT8A2704WEX equivalent, key selection criteria include multi-chemistry support, programmable charge termination, thermal regulation behavior, and SOIC-8 package compatibility with PCB layout constraints for high-current battery charging paths.
Technical Context
The PT8A2704WEX integrates a synchronous buck converter with adaptive switching frequency control and dual-loop feedback (voltage + current) for precise constant-current/constant-voltage (CC/CV) charging. It supports automatic cell-count detection via external resistor divider and includes dedicated NTC thermistor input for JEITA-compliant temperature profiling.
Charge termination is configurable via timer, voltage delta (-ΔV), or zero-current detection; safety features include overvoltage lockout (OVL), overtemperature shutdown (125°C), and reverse-battery protection. The device operates from 4.5V to 36V input and supports charge enable/disable via EN pin logic control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Chemistry Support | Li-ion, Li-polymer, NiMH, NiCd - enables single BOM reuse across product variants with different battery types. |
| Cell Count Range | 1–8 series cells - supports scalable battery packs from wearables to portable instrumentation. |
| Max Charge Current | 2A - sufficient for fast-charging 2600mAh–5200mAh packs without external MOSFETs. |
| Voltage Regulation Accuracy | ±0.5% at 25°C - ensures tight CV phase control critical for Li-ion cycle life and safety. |
| Input Voltage Range | 4.5V to 36V - compatible with 5V USB PD, 12V industrial rails, and 24V PoE-powered systems. |
| Thermal Foldback Threshold | 125°C shutdown with hysteresis - prevents thermal runaway during sustained high-power operation in enclosed enclosures. |
| Package Type | SOIC-8 exposed pad - provides low thermal resistance (θJA = 50°C/W) for efficient power dissipation without heatsink. |
Pinout & Package
PT8A2704WEX is housed in an 8-pin SOIC package with exposed thermal pad (SOIC-8EP), optimized for high-current battery charging applications requiring compact footprint and reliable thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power input | Accepts 4.5–36V DC; connects to bulk input capacitor and EMI filter before internal buck stage. |
| SW | Switch node | Drives external high-side and low-side MOSFETs (internal FETs not present); requires low-inductance routing to minimize switching loss. |
| FB | Voltage feedback | Senses battery voltage via resistive divider; sets CC/CV transition point and regulates final float voltage. |
| CS | Current sense | Monitors charge current via external sense resistor; enables accurate CC mode and termination detection. |
| NTC | Temperature input | Reads NTC thermistor voltage for JEITA profile compliance; disables charging outside safe temp range. |
| EN | Enable control | Active-high logic input; allows system-level host MCU to suspend/resume charging safely. |
| GND | Power ground | Common return path for VIN, SW, CS, and thermal pad; must be solid copper pour for thermal and noise performance. |
| PGND | Power ground (exposed pad) | Direct thermal and electrical connection to PCB ground plane; mandatory for thermal reliability and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-chemistry auto-detection | Configurable via external resistor network - eliminates firmware dependency for chemistry selection in resource-constrained MCUs. |
| JEITA-compliant thermal charging | Four-zone temperature-based charge rate scaling - meets IEC 62133 safety requirements for medical and industrial batteries. |
| Programmable charge termination | Timer, -ΔV, or zero-current detection - improves reliability vs. fixed-timer-only chargers in aging battery fleets. |
| Integrated OVP and OTP protection | Hardware-level shutdown at 21V VIN OVP and 125°C junction - prevents catastrophic failure without software intervention. |
| SOIC-8EP thermal design | θJA = 50°C/W with 2-layer 1oz Cu - enables 2A charging in 50mm² board area without forced air or heatsinks. |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Rechargeable Li-ion battery pack in Class II medical-grade vital sign monitors operating 8+ hours per charge. IC Role / Device Role / Timing Role: Primary battery charge controller managing CC/CV profile, cell balancing readiness, and thermal derating per IEC 60601-1 clause 15.3.2. Use Value: ±0.5% voltage accuracy extends battery cycle life beyond 500 cycles while JEITA compliance ensures safe operation across clinic, ambulance, and field environments. | Use Scenario: Rugged barcode scanner with hot-swappable NiMH battery pack used in warehouse logistics under ambient temperatures from –10°C to 50°C. IC Role / Device Role / Timing Role: Multi-chemistry charger enabling same PCB design for Li-ion upgrade path and legacy NiMH service units. Use Value: Automatic chemistry detection and programmable termination reduce BOM count by 100% versus discrete charger solutions, lowering total cost of ownership. |
| Test & Measurement DMMs | Remote Sensor Gateways |
Use Scenario: Benchtop digital multimeter with dual 4S Li-ion battery configuration requiring precise 16.8V float voltage and 2A fast-charge capability. IC Role / Device Role / Timing Role: High-accuracy voltage regulator and current limiter ensuring calibration stability during charging-induced rail perturbations. Use Value: Low 50°C/W thermal resistance maintains <1.5°C die rise at full load, preventing measurement drift caused by self-heating. | Use Scenario: LoRaWAN gateway deployed in outdoor cabinets with wide-temp LiFePO₄ backup battery (2S, 6.4V nominal). IC Role / Device Role / Timing Role: Adaptive charger supporting LiFePO₄-specific 3.65V/cell CV threshold and extended low-current top-off phase. Use Value: Programmable FB divider and CS gain allow exact matching to LiFePO₄ voltage curve, increasing usable capacity by 8% vs. generic Li-ion settings. |
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 | TI part uses external N-channel MOSFETs only; no integrated gate drivers; requires separate current-sense amplifier. | Lacks built-in JEITA logic; needs MCU firmware for temperature zone control. | Preferred when design already uses TI ecosystem and requires >3A charge current with discrete FET optimization. |
| ISL9238HRZ-T | Intersil part supports USB PD input negotiation but limits max cell count to 4; no NiMH/NiCd support. | Optimized for ultrabook-style USB-C powered devices, not industrial multi-cell packs. | Choose when USB-C port power delivery and compact 4S Li-ion charging are primary requirements. |
Compared with BQ24610RGER and ISL9238HRZ-T, PT8A2704WEX uniquely combines 1–8 cell flexibility, native NiMH/NiCd support, and hardware JEITA enforcement-making it optimal for industrial and medical platforms needing broad chemistry coverage without MCU overhead.
Availability
PT8A2704WEX is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, and test & measurement DMMs requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.
Supply support for PT8A2704WEX 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 semiconductor company specializing in discrete, analog, and mixed-signal components for power management, signal integrity, and connectivity applications.
The PT8A2704WEX belongs to Diodes' Power Management IC portfolio, designed specifically for robust, multi-chemistry battery charging in harsh-environment industrial and regulated medical equipment.
FAQ
What battery chemistries does PT8A2704WEX support?
PT8A2704WEX natively supports Li-ion, Li-polymer, NiMH, and NiCd chemistries. Chemistry selection is configured via external resistor networks on the CHEM pin, enabling hardware-based auto-detection without MCU involvement. It does not support LiFePO₄ or lead-acid without external voltage translation circuitry.
Does PT8A2704WEX require external MOSFETs?
No - PT8A2704WEX integrates synchronous buck controller logic but does not include power MOSFETs. It drives external high-side and low-side N-channel MOSFETs via the SW pin and internal gate drivers. This architecture allows designers to select FETs optimized for specific voltage, current, and thermal requirements.
How is thermal regulation implemented?
Thermal regulation uses a dedicated NTC thermistor input (NTC pin) with four-zone JEITA-compliant thresholds (cold, cool, warm, hot). The IC automatically scales charge current or suspends charging based on measured temperature, with hardware-level shutdown at 125°C junction temperature and 20°C hysteresis.
Can PT8A2704WEX charge a 6S Li-ion pack?
Yes - PT8A2704WEX supports up to 8-series Li-ion cells, so a 6S configuration (nominal 22.2V, max 25.2V) is fully supported. The FB pin voltage divider must be set for 4.2V × 6 = 25.2V output, and input voltage must exceed 25.2V + dropout (typically ≥27V) for proper regulation.
PT8A2704WEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
PT8A2704WEX FAQ
1.How can I place an order for PT8A2704WEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT8A2704WEX 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 PT8A2704WEX reliable?
The price and inventory of PT8A2704WEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A2704WEX is usually 5 days.
3.What payment methods are accepted for PT8A2704WEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A2704WEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT8A2704WEX?
PT8A2704WEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT8A2704WEX 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 PT8A2704WEX?
For technical support, including PT8A2704WEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A2704WEX requirements.
6.How does Aetrix verify that PT8A2704WEX is sourced from the original manufacturer or authorized distributors?
All PT8A2704WEX 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 PT8A2704WEX meets industry standards.
7.What is the process for return or replacement of PT8A2704WEX?
All PT8A2704WEX units undergo pre-shipment inspection (PSI). If there is an issue with PT8A2704WEX, 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 PT8A2704WEX part is unused and in its original packaging.
Return procedure for PT8A2704WEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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