Diodes Incorporated PT8A3263BPE

Overview

PT8A3263BPE from Princeton Technology is a mixed-signal CMOS LSI NTC-based heating controller IC with 5-step temperature control, NTC open detection, and direct TRIAC/SCR gate drive (300 µs pulse, 15 mA peak). It supports dual-voltage (120/240 VAC) and auto-frequency (50/60 Hz) detection, includes internal 5 V Zener regulation, and drives up to six LEDs for temperature-level indication. Used in ceramic heating appliances requiring precise thermal regulation and user feedback.

For engineers reviewing the PT8A3263BPE datasheet, PT8A3263BPE pinout, PT8A3263BPE application, or PT8A3263BPE equivalent, key selection criteria include NTC input voltage thresholds (1.08–3.01 V across 100–200 °C), GATE output pulse timing (270–330 µs), internal timer disable via TM pin, LED drive capability (high-pulse, 50 Hz), and DIP-16 package compatibility with through-hole thermal management.

Technical Context

The PT8A3263BPE integrates an internal RC oscillator (74.4–85.6 kHz), four-level CLK comparator circuitry for automatic 120/240 VAC line voltage discrimination (VLEVEL = 1.69–2.07 V), and NTC1 analog input with six calibrated voltage thresholds corresponding to 100–180 °C (5-step mode). Its GATE output delivers synchronized trigger pulses on both AC zero-crossing edges to drive high-current SCR/TRIACs.

It implements hardware-level safety features including NTC open-circuit detection (via NTC2 output), POR reset at power-on, and auto-power-off after exactly 60 minutes (disableable by grounding TM pin). The device uses internal pull-up/down resistors (80–120 kΩ) on K1/K2 buttons and supports LED indicator modes including steady-on, flashing (FCLK/32), and cascaded illumination (Mode 4).

Key Specifications

Pinout & Package

DIP-16 (Plastic Dual In-line Package) with 2.54 mm lead pitch, JEDEC MS-001D/BB compliant, height 3.20–3.60 mm, body width 6.20–6.60 mm, length 18.80–19.20 mm - optimized for wave soldering and thermal dissipation in mains-connected heating modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NTC-based heating controller applications.

Compared with PT8A3264BPE, PT8A3263BPE offers identical thermal control fidelity but defaults to Level 4 at power-on - reducing warm-up time in consumer appliances. Versus PT8A3265BPE, it omits L6 and associated 200 °C calibration, simplifying design for cost-sensitive 180 °C-limited applications.

Availability

PT8A3263BPE is available at Aetrix Electronics and suitable for ceramic heating controllers, electric kettle thermal management, industrial heat gun regulation, and medical warming pad systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT8A3263BPE 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 is designed specifically for cost-optimized, microcontroller-free thermal control in mains-powered heating devices - emphasizing hardware autonomy, safety integration, and minimal external component count.

FAQ

What is the function of the TM pin on PT8A3263BPE?

The TM (Timer) pin enables or disables the 1-hour auto-power-off feature. When left floating, the internal timer activates and shuts off heating after exactly 60 minutes. Grounding TM disables this function permanently, allowing indefinite operation - critical for applications requiring sustained heating without interruption.

Can PT8A3263BPE drive a 20 A TRIAC directly?

No. PT8A3263BPE's GATE output delivers up to 15 mA peak current with 300 µs pulse width - sufficient for triggering 15 A TRIACs like BT139-600E, but not 20 A devices. For 20 A loads, add a small-signal transistor buffer (e.g., MMBT3904) between GATE and TRIAC gate to ensure reliable turn-on under worst-case temperature and voltage conditions.

How does PT8A3263BPE detect 120 VAC vs 240 VAC?

It uses the CLK pin's AC waveform amplitude. Internal comparators (VT1–VT4) monitor CLK against VLEVEL (1.69–2.07 V). At 240 VAC, CLK exceeds VLEVEL, triggering high-voltage mode with reduced power duty cycle; at 120 VAC, CLK stays below VLEVEL, enabling full-power operation - all without software or external components.

Is the NTC1 input ratiometric or absolute-voltage referenced?

NTC1 is absolute-voltage referenced. Its thresholds (e.g., 1.216 V at 100 °C) are fixed against VDD, not proportional to supply. This ensures consistent temperature setpoints across VDD variations from 4.0–6.5 V, verified in DC electrical characteristics tables with VDD = 4.5 V test condition and specified min/typ/max voltages per temperature point.