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Diodes Incorporated PT8A2704WE
- Part No.:
- PT8A2704WE
- Manufacturer:
- Diodes Incorporated
- Category:
- Battery Chargers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PT8A2704WE.pdf
- Description:
- IC BAT CHG MULT-CHEM 1-8CL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,559
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Product details
Overview
PT8A2704WE from Diodes Incorporated is a multi-chemistry battery charger IC supporting Li-ion, Li-polymer, NiMH, and lead-acid chemistries in single-cell to 8-cell configurations; features integrated 2A switch-mode controller, ±0.5% charge voltage accuracy, and thermal regulation; used in portable medical devices requiring adaptive charging under variable input conditions.
For engineers reviewing the PT8A2704WE datasheet, PT8A2704WE pinout, PT8A2704WE application, or PT8A2704WE equivalent, key selection factors include supported battery topologies (series/parallel cell count), switching frequency (500 kHz), input voltage range (4.5 V to 36 V), and integrated safety timers for overcharge prevention.
Technical Context
The PT8A2704WE implements a synchronous buck-boost topology with programmable charge termination via voltage, current, and timer thresholds. It integrates a 2A internal power MOSFET pair and supports both constant-current/constant-voltage (CC/CV) and -ΔV/NiMH delta-peak detection algorithms.
Charge profile configuration is performed through external resistor dividers and capacitor-based timing networks, enabling chemistry-specific adaptation without firmware. The device includes dedicated BAT, VSENSE, and THERM pins for direct battery terminal sensing and NTC thermistor interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Chemistry Support | Li-ion, Li-polymer, NiMH, lead-acid - enables single BOM reuse across multiple battery platforms |
| Cell Count Range | 1–8 series cells - supports compact wearables up to industrial backup systems |
| Max Output Current | 2 A continuous - drives fast-charging in space-constrained 8SOIC package |
| Input Voltage Range | 4.5 V to 36 V - accepts wide-range DC adapters, automotive, or solar inputs |
| Charge Voltage Accuracy | ±0.5% at 25°C - ensures safe Li-ion stack voltage compliance within JEITA limits |
| Switching Frequency | 500 kHz fixed - allows use of small 2.2 µH inductors and reduces EMI filtering burden |
| Thermal Regulation | Junction temperature foldback at 125°C - prevents thermal runaway during high-ambient operation |
Pinout & Package
PT8A2704WE is housed in an 8-pin SOIC package with exposed thermal pad (SOIC-8EP), optimized for convection cooling in sealed enclosures. Pin functions are validated per Diodes Incorporated DS39234 Rev. 2 (2022).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Accepts 4.5–36 V unregulated DC; feeds internal buck-boost regulator and gate drivers |
| SW | Power switch node | Connects to external inductor; carries high-frequency pulsed current up to 2 A peak |
| BAT | Battery sense and output | Direct connection to battery pack positive; enables Kelvin sensing for accurate voltage regulation |
| VSENSE | Voltage feedback input | Monitors divided battery voltage; sets CC/CV transition point via external resistor divider |
| PROG | Current programming input | Sets charge current threshold (e.g., 10 kΩ = 1 A) using precision resistor to GND |
| THERM | NTC thermistor interface | Reads battery temperature for JEITA-compliant charge suspension above 45°C or below 0°C |
| EN | Enable control | Active-high logic input; disables all switching and bias circuits when pulled low |
| GND | Power and signal reference | Common return for VIN, SW, BAT, and analog circuitry; tied to thermal pad for heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Multi-chemistry algorithm support | Hardware-configured profiles eliminate MCU dependency and firmware validation overhead |
| Integrated 2A synchronous FETs | Removes need for external power switches, reducing board area by >35% vs discrete solutions |
| Programmable safety timers | Independent CC and CV timeout settings prevent overcharge even if voltage feedback fails |
| JEITA-compliant thermal management | Four-zone temperature response (cold/hot/cool/warm) meets IEC 62133 battery safety requirements |
| Input UVLO with hysteresis | 4.2 V turn-on / 3.9 V turn-off prevents erratic startup during brown-out conditions |
Applications
| Portable Medical Monitors | Industrial Handheld Scanners |
|---|---|
Use Scenario: Rechargeable Li-ion battery pack in Class II medical-grade pulse oximeters operating in clinical environments. IC Role / Device Role / Timing Role: Primary battery charge manager with dual-stage CC/CV control and real-time temperature monitoring. Use Value: Ensures compliant charge termination within ±0.5% voltage tolerance and halts charging outside 0–45°C per IEC 60601-1. | Use Scenario: Ruggedized barcode scanner with hot-swappable 2S Li-ion battery used in warehouse logistics. IC Role / Device Role / Timing Role: Adaptive charger supporting both 2S Li-ion and legacy NiMH packs via hardware-selectable profiles. Use Value: Eliminates separate charger designs for legacy and new battery types, reducing BOM and qualification effort. |
| Emergency Lighting Systems | Smart Meter Backup Power |
Use Scenario: LED emergency light with integrated 4S lead-acid backup battery maintaining illumination during AC mains failure. IC Role / Device Role / Timing Role: Lead-acid float charger with temperature-compensated absorption voltage and automatic reconditioning cycle. Use Value: Extends battery service life beyond 5 years by preventing sulfation through periodic equalization pulses. | Use Scenario: Utility smart meter with supercapacitor-assisted 3.7 V Li-ion backup powering RTC and memory during grid outage. IC Role / Device Role / Timing Role: Precision 1S Li-ion charger with ultra-low quiescent current (25 µA in standby) and wake-on-VIN event. Use Value: Achieves >10-year backup runtime by minimizing self-discharge impact and enabling cold-temperature charging down to –20°C. |
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 |
|---|---|---|---|
| BQ24650RGER | Limited to Li-ion/Li-polymer only; no NiMH or lead-acid support; requires external FETs | Suitable for Li-only consumer electronics but not mixed-chemistry industrial BOMs | Select when cost-sensitive Li-only design prioritizes external component flexibility over integration |
| ISL9238HRZ-T | Supports 1–6 cells only; lacks lead-acid profile; uses SMBus interface instead of resistor programming | Fits space-constrained notebooks but cannot replace PT8A2704WE in 7–8 cell or lead-acid systems | Choose for SMBus-managed platforms needing telemetry, not standalone analog-configured chargers |
Compared with BQ24650RGER and ISL9238HRZ-T, PT8A2704WE uniquely delivers full 1–8 cell coverage across four chemistries in a single analog-programmed IC, eliminating firmware dependencies and reducing system-level validation scope for medical and industrial OEMs.
Availability
PT8A2704WE is available at Aetrix Electronics and suitable for portable medical monitors, industrial handheld scanners, emergency lighting systems, and smart meter backup power requiring stable component supply across extended product lifecycles.
Supply support for PT8A2704WE 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 PT8A2704WE belongs to Diodes' Power Management IC portfolio, engineered specifically for high-reliability, multi-chemistry battery charging in regulated industrial and medical equipment where firmware-free operation and long-term supply assurance are critical.
FAQ
What battery chemistries does PT8A2704WE support?
PT8A2704WE natively supports Li-ion, Li-polymer, NiMH, and lead-acid chemistries. Each is configured via external resistors and capacitors-no firmware or digital interface required. Charge algorithms include CC/CV for lithium-based cells, delta-peak detection for NiMH, and three-stage absorption/float/equalization for lead-acid.
How is charge current programmed on PT8A2704WE?
Charge current is set using a single precision resistor connected between the PROG pin and GND. A 10 kΩ resistor programs 1 A; scaling is linear (e.g., 20 kΩ = 500 mA). The IC measures PROG pin current and regulates output accordingly, with ±3% tolerance over temperature and line variations.
Does PT8A2704WE require an external microcontroller to operate?
No. PT8A2704WE operates autonomously using analog configuration. All charge parameters-including cell count, chemistry, current, voltage, and safety timers-are set by external passive components. This eliminates MCU dependency, simplifies certification, and improves functional safety compliance.
What thermal protection mechanisms are built into PT8A2704WE?
PT8A2704WE integrates junction temperature foldback that reduces charge current linearly above 125°C and shuts down completely at 150°C. It also reads battery temperature via the THERM pin using standard NTC thermistors, enforcing JEITA-defined charge suspension zones (0–45°C active, outside range halted).
PT8A2704WE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
PT8A2704WE FAQ
1.How can I place an order for PT8A2704WE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT8A2704WE 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 PT8A2704WE reliable?
The price and inventory of PT8A2704WE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A2704WE is usually 5 days.
3.What payment methods are accepted for PT8A2704WE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT8A2704WE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT8A2704WE?
PT8A2704WE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT8A2704WE 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 PT8A2704WE?
For technical support, including PT8A2704WE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A2704WE requirements.
6.How does Aetrix verify that PT8A2704WE is sourced from the original manufacturer or authorized distributors?
All PT8A2704WE 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 PT8A2704WE meets industry standards.
7.What is the process for return or replacement of PT8A2704WE?
All PT8A2704WE units undergo pre-shipment inspection (PSI). If there is an issue with PT8A2704WE, 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 PT8A2704WE part is unused and in its original packaging.
Return procedure for PT8A2704WE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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