Diodes Incorporated PT8A3253PE

Overview

PT8A3253PE from Pericom Semiconductor is a mixed-signal CMOS ceramic heating controller IC with 6 programmable temperature setpoints (150°C to 230°C), SCR gate drive output, over-temperature protection at 280°C, and auto power-off timer (1.2 hr @ 50 Hz). It interfaces directly with PTC thermistors and drives high-watt-density alumina heaters in consumer cooking appliances.

For engineers reviewing the PT8A3253PE datasheet, PT8A3253PE pinout, PT8A3253PE application, or PT8A3253PE equivalent, key selection criteria include its dual-reference comparator architecture for precise thermal thresholding, double-pulse SCR triggering capability, MHP algorithm for rapid heat-up and lost-heat recovery, and lead-free DIP-16 package compatibility with through-hole reflow processes.

Technical Context

The PT8A3253PE integrates an internal oscillator synchronized to AC line frequency via CLK input, enabling accurate timing for its 216,000-cycle auto-shutdown timer. Its dual-reference comparator structure (REF1/REF2) supports adjustable thermal thresholds across six levels using external resistor networks.

It implements a proprietary MHP (Multi-Heat Pulse) algorithm that dynamically modulates SCR gate pulses based on real-time PTC voltage feedback, delivering uniform thermal response while compensating for ambient temperature drift and heater resistance variation.

Key Specifications

Pinout & Package

PT8A3253PE is supplied in a lead-free DIP-16 package per JEDEC MS-001D/BB, with 0.3" body width, 2.54 mm pitch, and 19.0 mm × 7.6 mm footprint. Pin 1 is marked by notch or dot; pins are numbered left-to-right on top row (1–8), then right-to-left on bottom row (9–16).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ceramic heating controller applications.

Compared with PT8A3251PE, PT8A3253PE removes the auto-shutdown timer but retains identical thermal sensing, SCR drive, and UI capabilities-making it ideal for cost-sensitive, manually reset applications. Unlike STSPIN32F0B, it requires no firmware development yet delivers application-optimized thermal control out-of-box.

Availability

PT8A3253PE is available at Aetrix Electronics and suitable for induction cooktop control, ceramic hob temperature management, electric wok controllers, and commercial food warmers requiring stable component supply and long-term industrial availability.

Supply support for PT8A3253PE 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

Pericom Semiconductor (acquired by Diodes Incorporated in 2016) specialized in high-performance interface, timing, and power management ICs for consumer and industrial applications before integration into Diodes' analog portfolio.

The PT8A325x series was designed specifically for ceramic and induction cooking appliances, integrating thermal sensing, SCR control, user interface, and safety functions into a single mixed-signal CMOS device.

FAQ

What is the functional difference between PT8A3251PE and PT8A3253PE?

The PT8A3251PE includes an internal hardware timer that automatically disables heating after 216,000 AC line cycles (1.2 hr @ 50 Hz), while the PT8A3253PE omits this timer. All other features-including 6-level temperature control, MHP algorithm, PTC interface, SCR gate drive, and over-temperature protection-are identical. The part numbers reflect distinct product variants within the same silicon die family.

Can PT8A3253PE drive multiple SCR circuits simultaneously?

No. PT8A3253PE provides a single GATE output pin designed to drive one SCR gate via an external current-limiting resistor. Driving multiple SCRs would require external transistor buffering or parallel ICs. Its architecture assumes one heater zone per IC, consistent with its L1/L2/L3 button and C1/C2 LED scan design.

How is temperature calibration performed on PT8A3253PE?

Calibration is achieved by adjusting external resistor networks connected to REF1 and REF2 pins. Each temperature setpoint corresponds to a specific voltage ratio (VB − REF2), with factory-trimmed thresholds ranging from 0.482×(VB−REF2) at 150°C to 0.529×(VB−REF2) at 230°C. No trimming potentiometer is required-only precision metal-film resistors.

Does PT8A3253PE support PTC sensors with non-standard β values?

Yes. By modifying the REF1/REF2 resistor divider, the IC accommodates PTC thermistors with β coefficients from 3000 K to 4500 K. The dual-reference comparator architecture allows full scaling of the thermal threshold ladder, enabling accurate mapping even for custom or aged PTC elements outside typical 3950 K specifications.