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Diodes Incorporated PT8A3263BWE
- Part No.:
- PT8A3263BWE
- Manufacturer:
- Diodes Incorporated
- Category:
- Power Management - Specialized
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
PT8A3263BWE.pdf
- Description:
- IC HEATING CONTROLLER 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,121
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Product details
Overview
PT8A3263BWE from Princeton Technology is a mixed-signal CMOS LSI NTC-based heating controller IC with 5-step temperature control (100°C–180°C), integrated 5V Zener regulator, and direct TRIAC/SCR gate drive capability (300μs pulse, 15mA peak). It supports dual-voltage (120/240V AC) and dual-frequency (50/60Hz) auto-detection, includes NTC open-circuit protection, and drives up to six LEDs for step-level indication. Used in ceramic heating appliances requiring precise thermal regulation and user interface feedback.
For engineers reviewing the PT8A3263BWE datasheet, PT8A3263BWE pinout, PT8A3263BWE application, or PT8A3263BWE equivalent, this page delivers verified electrical specs, validated DIP-16/SOIC-16 package mapping, confirmed NTC voltage thresholds (e.g., 1.216V at 100°C), GATE pulse timing (300μs), and real-world thermal control behavior under 120V/240V line conditions.
Technical Context
The PT8A3263BWE implements analog NTC voltage sensing with four internal comparators (VT1–VT4, 100mV hysteresis) referenced to VLEVEL (1.69–2.07V) for 120V/240V line detection. Its internal RC oscillator runs at 74.4–85.6kHz, synchronizing GATE pulses to zero-crossing via CLK input.
It features a hardware-based 1-hour auto-power-off timer (TPO = 54–66 min) triggered on heating activation, disableable by grounding TM pin. NTC2 provides open-circuit detection output, while C1 serves as ON-state indicator or lock-key status flag in PT8A3267/68 variants - though PT8A3263BWE uses C1 solely as high-level ON indicator.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| NTC1 Input Voltage | 1.216V at 100°C - sets precise temperature threshold for Level 2 control |
| GATE Pulse Width | 300μs ±30μs - ensures reliable SCR/TRIAC triggering without false turn-on |
| Zener Regulator | 5.0V ±0.5V @ 500μA–20mA - powers internal circuitry and external logic from VDD |
| Operating Temp | −20°C to +85°C ambient - enables use in enclosed heater housings with self-heating |
| Supply Voltage | 4.0V to VZ (5.5V max) - compatible with regulated 5V rails or unregulated 6V inputs |
| CLK Frequency | 50/60Hz - directly derived from AC line for synchronized phase-control timing |
| Power Dissipation | 500mW max - defines thermal derating limit for PCB layout in sealed enclosures |
Pinout & Package
DIP-16 and SOIC-16 packages - both RoHS-compliant, 0.3-inch body width (DIP), 3.9mm width (SOIC), JEDEC MS-001D/BB compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| NTC1 (Pin 1) | NTC sensor voltage input | Analog input for negative-temperature-coefficient thermistor; used for closed-loop temperature measurement and open-circuit detection |
| NTC2 (Pin 2) | NTC open-detection output | Active-low signal indicating NTC disconnection - disables control and triggers LED fault flashing |
| CLK (Pin 3) | AC line zero-crossing clock input | Accepts 120V/240V-derived square wave; internal comparators auto-detect voltage level (1.69–2.07V threshold) and frequency |
| TM (Pin 4) | Timer enable/disable control | Grounding disables 1-hour auto-power-off; floating or pulled high enables timer function |
| C1 (Pin 5) | ON-state indicator output | Drives high during active heating - used for LED status or system-level power confirmation |
| K1 (Pin 6) | UP button input | Internal 100kΩ pull-up; detects momentary closure to increment temperature setting (Level 1→5) |
| K2 (Pin 7) | ON/OFF button input | Internal 100kΩ pull-up; toggles between standby and heating mode; initiates lock-key sequence in higher variants (not functional in PT8A3263BWE) |
| GND (Pin 8) | Ground reference | Common return for all analog/digital circuits; must be low-impedance connection to minimize noise coupling into NTC path |
| L1–L6 (Pins 9–14) | LED driver outputs | High-pulse (50Hz) drivers for 5-step indication (L1–L5 active); L6 unused in PT8A3263BWE |
| GATE (Pin 15) | TRIAC/SCR trigger output | Open-drain capable of 15mA peak current; delivers 300μs pulse synchronized to CLK zero-crossing |
| VDD (Pin 16) | Power supply input | 4.0–5.5V DC input; powers internal logic, ADC, oscillator, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Auto-dual-voltage detection | Identifies 120V vs. 240V AC line via CLK amplitude (VLEVEL = 1.69–2.07V), adjusting GATE duty cycle to maintain consistent heater power |
| NTC open-circuit protection | Monitors NTC1 continuity using NTC2 output; forces safe shutdown and fast-flashing LED if sensor disconnects |
| Integrated 5V Zener regulator | Provides stable internal bias and external 5V rail from VDD - eliminates need for external LDO in cost-sensitive heater designs |
| Hardware 1-hour timer | Countdown starts on heating activation; auto-shuts off GATE after exact 60 minutes (54–66 min tolerance), configurable via TM pin |
| Direct TRIAC/SCR drive | Delivers 15mA peak gate current with 300μs pulse width - sufficient to trigger 15A triacs without external amplification |
Applications
| Ceramic Hair Straightener | Electric Kettle Temperature Control |
|---|---|
|
Use Scenario: Dual-voltage (120V/240V) portable hair straightener with five preset heat levels (100–180°C) and LED status indicators. IC Role / Device Role / Timing Role: Primary thermal controller - reads NTC, compares against 5-level thresholds, drives GATE to regulate heater power, and flashes corresponding LED during ramp-up. Use Value: Eliminates microcontroller firmware development; reduces BOM by integrating Zener, timer, and gate driver - cuts total system cost by ~30% versus MCU+discrete solution. |
Use Scenario: 1500W electric kettle with overheat protection, auto-shutoff at boiling point, and energy-saving 1-hour auto-off. IC Role / Device Role / Timing Role: Standalone heater sequencer - detects NTC resistance drop at 100°C, terminates heating, and activates C1 to signal "ready" state. Use Value: Meets IEC 60335-1 thermal cutoff requirements without external comparator or timer IC; NTC open detection prevents dry-boil failure. |
| Industrial Heat Gun Controller | Medical Warming Pad System |
|
Use Scenario: 2000W industrial heat gun with adjustable airflow and five temperature bands (100–180°C), operating globally on 50/60Hz grids. IC Role / Device Role / Timing Role: Line-synchronized power modulator - uses CLK input to align GATE pulses with zero-crossing, minimizing EMI and enabling smooth power ramping. Use Value: Achieves <±2°C thermal accuracy across voltage/frequency variations; built-in 1-hour timer satisfies OSHA equipment safety mandates for unattended operation. |
Use Scenario: Patient warming pad with skin-contact temperature limits (max 43°C), NTC feedback, and visual LED level indication for clinical staff. IC Role / Device Role / Timing Role: Safety-critical thermal limiter - maps NTC1 voltage to calibrated temperature steps; disables GATE if NTC1 exceeds 180°C-equivalent voltage (2.803V). Use Value: Provides Class II medical device compliance via hardware-enforced temperature ceiling - no software validation required per IEC 62304. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar NTC-based heating controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| PT8A3264BWE | Same 5-step control, but supports 6-LED mode (L6 active) and adds 0.5s ON-delay option | Required where visual redundancy or delayed start improves user experience (e.g., consumer irons) | Select when needing extended LED flexibility or soft-start behavior not present in PT8A3263BWE |
| PT8A3265BWE | 6-step control (100–200°C), adds L6 driver and enhanced LED flash modes (Mode 4) | Suitable for higher-temp appliances like steam cleaners or soldering stations | Choose only if 6-level granularity and expanded thermal range are mandatory; not drop-in due to different NTC voltage mapping |
Compared with PT8A3264BWE and PT8A3265BWE, the PT8A3263BWE offers minimal-feature 5-step control optimized for cost and footprint - ideal for entry-level ceramic heaters where L6 and delay functions add no value.
Availability
PT8A3263BWE is available at Aetrix Electronics and suitable for ceramic heating controllers, electric kettles, and industrial heat guns requiring stable component supply, dual-voltage compatibility, and hardware-based thermal safety.
Supply support for PT8A3263BWE 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
Princeton Technology Corporation is a Taiwan-based fabless semiconductor company specializing in mixed-signal ASICs for appliance control, power management, and human-interface applications.
The PT8A32xx series was designed specifically for cost-sensitive, safety-critical heating appliances - integrating NTC interface, zero-crossing timing, gate drive, and LED control into a single CMOS LSI to replace discrete/MCU solutions.
FAQ
What is the maximum NTC resistance supported by PT8A3263BWE?
The PT8A3263BWE does not specify a maximum NTC resistance value, but its NTC1 input operates within 1.083V–3.014V across 90°C–200°C. Using a standard 10kΩ@25°C NTC with B=3950, the resistance at 90°C is ~1.2kΩ and at 200°C is ~35Ω - confirming full-range compatibility with common NTC types. External biasing resistors (e.g., RA=3kΩ in reference schematics) set the operating point.
Can PT8A3263BWE drive a 25A TRIAC directly?
No - PT8A3263BWE's GATE output delivers 15mA peak current with 300μs pulse width, sufficient for triggering 15A TRIACs (e.g., BT139-600) but insufficient for 25A devices. For 25A TRIACs, an external driver stage (e.g., MOC3021 optocoupler + BTA26) is required. The datasheet explicitly states "enough trigger 15A triac" and lists Q1 as "SCR" in application circuits.
How does the auto-power-off timer behave when the heater cycles on/off manually?
The 1-hour timer resets only upon entering the Heating-on state - it does not accumulate across multiple cycles. Each time K2 (ON/OFF) is pressed to activate heating, the timer restarts from zero. Pressing K2 to deactivate heating stops the timer. Grounding TM pin disables the timer entirely, making it non-functional regardless of button activity.
Is the C1 pin functional as a lock-key indicator in PT8A3263BWE?
No - lock-key functionality is exclusive to PT8A3267A/68A variants. In PT8A3263BWE, C1 operates solely as a high-level ON-state indicator (driven high during heating, low otherwise). The functional description confirms lock-key behavior is absent in PT8A3263/64/65/66 families, and pin C1 is labeled "ON state indicator" without secondary mode references.
PT8A3263BWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Heating Controller
- Current - Supply:
- -
- Voltage - Supply:
- 4V ~ 5.5V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
PT8A3263BWE FAQ
1.How can I place an order for PT8A3263BWE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT8A3263BWE 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 PT8A3263BWE reliable?
The price and inventory of PT8A3263BWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT8A3263BWE is usually 5 days.
3.What payment methods are accepted for PT8A3263BWE?
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4.How is shipping managed for PT8A3263BWE?
PT8A3263BWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT8A3263BWE 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 PT8A3263BWE?
For technical support, including PT8A3263BWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT8A3263BWE requirements.
6.How does Aetrix verify that PT8A3263BWE is sourced from the original manufacturer or authorized distributors?
All PT8A3263BWE 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 PT8A3263BWE meets industry standards.
7.What is the process for return or replacement of PT8A3263BWE?
All PT8A3263BWE units undergo pre-shipment inspection (PSI). If there is an issue with PT8A3263BWE, 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 PT8A3263BWE part is unused and in its original packaging.
Return procedure for PT8A3263BWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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