Texas Instruments TPIC9201N

Overview

TPIC9201N from Texas Instruments is an integrated 8-channel low-side driver IC with internal clamp diodes, 5-V regulator, zero-voltage synchronization (ZVS), and serial SPI interface - designed for appliance motor/relay control. It delivers 150 mA per output (seven at 150 mA, one with dedicated enable), operates from 7–18 V unregulated input, and integrates thermal shutdown, programmable reset delay (6 ms typ), and AC zero-cross detection for in-rush current reduction in washing machines and dishwashers.

For engineers reviewing the TPIC9201N datasheet, TPIC9201N pinout, TPIC9201N application, or TPIC9201N equivalent, this page provides verified technical context on its 20-pin PDIP package, 8-bit shift-register control, 5-V ±5% regulated output, open-drain RST with hysteresis, and ZVS timing reference - all critical for embedded appliance power-stage design and microcontroller interface validation.

Technical Context

The TPIC9201N integrates a linear 5-V regulator powered from VIN (7–18 V), delivering up to 200 mA while maintaining ±5% regulation across temperature and load. Its serial interface uses SPI-compatible 8-bit shift register with NCS, SCLK, and MOSI, where a single write updates all eight outputs - OUT1 supports dual control via serial register or dedicated EN1 pin.

ZVS output generates a low-frequency clock synchronized to AC line zero-crossing, enabling microcontroller timing for peak-voltage switching; SYN input accepts 0–18 V AC-derived signals, and RST provides open-drain power-on reset with programmable delay (via external 47-nF capacitor) and hysteresis (0.12–0.5 V).

Key Specifications

Pinout & Package

TPIC9201N is housed in a 20-pin plastic dual in-line package (PDIP-N), with fused internal ground leads on pins 10 and 11 for enhanced thermal and electrical performance. The package meets RoHS requirements and is rated for –40°C to +125°C operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-side driver applications.

Compared with ULN2803ADWR and TPL7407LPG, TPIC9201N uniquely combines serial control, AC zero-cross timing, regulated 5-V output, and programmable reset in a single PDIP package - making it optimal for appliance MCU subsystems requiring coordinated, energy-efficient load switching.

Availability

TPIC9201N is available at Aetrix Electronics and suitable for washing machine control, dishwasher motor drive, refrigerator compressor interface, range hood fan control, and HVAC blower module applications requiring stable component supply and long-term industrial lifecycle support.

Supply support for TPIC9201N 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of experience in industrial and appliance-grade IC design.

The TPIC9201N belongs to TI's appliance interface IC product line, engineered specifically to consolidate power-stage control, AC timing, and microcontroller power supply into a single robust device for white-goods applications.

FAQ

What is the maximum continuous current per output of the TPIC9201N?

The TPIC9201N specifies 150 mA per output (OUT1–OUT8) under recommended operating conditions. Absolute maximum rating allows brief 350-mA current limiting during fault conditions, but sustained operation above 150 mA per channel risks thermal violation. Derating applies above 25°C ambient - consult the 69°C/W θJA value and power dissipation curves in the datasheet for thermal design.

Does the TPIC9201N support PWM control of its outputs?

Yes, the TPIC9201N supports PWM control via rapid updates to its 8-bit output register. To achieve PWM, the microcontroller must rewrite the register at least twice the desired output frequency - maximum usable PWM frequency is 5 kHz. OUT1 can also be held ON continuously using the EN1 pin, bypassing serial updates entirely.

How does the ZVS output function in the TPIC9201N?

The ZVS output of the TPIC9201N generates a clean, low-frequency square wave synchronized to AC line zero-crossing events. It derives timing from the SYN input (0–18 V AC signal), with internal threshold detection at 0.4–1.1 V. This signal enables microcontrollers to trigger load switching at voltage peaks - reducing in-rush current and electromagnetic interference in motor and heater applications.

What is the purpose of the RDELAY pin on the TPIC9201N?

The RDELAY pin on the TPIC9201N sources a precise 28 µA current to charge an external capacitor, setting the power-on reset delay before RST asserts high. With a 47-nF capacitor, it delivers ~6 ms delay - ensuring the internal 5-V regulator stabilizes before releasing the microcontroller from reset. This prevents premature SPI communication and guarantees reliable system boot sequencing.

Can the TPIC9201N operate from a 3.3-V logic supply?

Yes, the TPIC9201N supports 3.3-V or 5-V logic levels on MOSI, NCS, SCLK, and EN1 inputs - with VIH minimum of 2.4 V and VIL maximum of 0.8 V. Its I/O tolerance allows direct interfacing to 3.3-V microcontrollers without level-shifting, while VIN (7–18 V) and 5VOUT remain independent of logic voltage - preserving robustness in mixed-supply systems.