STMicroelectronics STM802BDR

Overview

STM802BDR from STMicroelectronics is a solenoid controller IC in SO-8 package, implementing dual-mode (in-rush/hold) current regulation for electromagnetic actuators. It features 8–35 V DC supply range, built-in 11 V gate drive clamp, logic-controlled enable input, 64 ms in-rush interval, and fixed 4.5:1 in-rush-to-hold current ratio - used in automotive door locks and industrial valve drivers.

For engineers reviewing the STM802BDR datasheet, STM802BDR pinout, STM802BDR application, or STM802BDR equivalent, key selection considerations include its integrated timing oscillator (no external capacitor), 2 µs feedback filter time constant, EN pin hysteresis (0.3 V), and SO-8 thermal performance under 35 V operation.

Technical Context

The STM802BDR integrates a precision internal oscillator and voltage references (V1 = 345 mV typ., V2 = 77 mV typ.) to generate fixed in-rush (56–72 ms) and hold current states without external timing components. Its gate driver delivers −1.6 mA source / +4.5 mA sink capability with clamped 11 V output for MOSFET control.

Feedback is processed through an integrated 2 µs RC filter, and the EN pin supports three-state logic control (low/high/floating) with 0.8 V low threshold and 2 V high threshold. The device operates across −40°C to +85°C with quiescent current of 0.9 mA at 9 V supply.

Key Specifications

Pinout & Package

STM802BDR is housed in a standard SO-8 surface-mount package (5.0 × 4.0 mm body, 1.27 mm pitch), rated for 300°C lead temperature and compatible with automated reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE6240GP and VNQ5E050AKTR-E, the STM802BDR uniquely delivers self-timed dual-current regulation in SO-8 with zero external timing components - making it optimal for cost-sensitive, space-constrained solenoid drivers where precise in-rush control is mandatory.

Availability

STM802BDR is available at Aetrix Electronics and suitable for automotive door locks, industrial pneumatic valves, office equipment feeders, and appliance water inlet solenoids requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for STM802BDR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.

The STM802 belongs to ST's dedicated solenoid and electromagnetic actuator driver product line, engineered specifically to replace discrete MOSFET+op-amp+timer designs with integrated, thermally robust, and timing-accurate current regulation ICs.

FAQ

What is the function of the TST pin on STM802BDR?

The TST pin is a factory test input used exclusively during wafer-level and final test screening. It must remain unconnected and floating in all end applications - any external bias or loading will disrupt internal reference calibration and cause unpredictable regulation behavior.

Can STM802BDR drive a P-channel MOSFET instead of N-channel?

No - the GATE output is designed as a low-side driver with active pull-down and clamped pull-up, optimized for N-channel MOSFETs referenced to ground. Driving a P-channel would require inversion, level-shifting, and loss of the integrated gate clamp benefit - ST does not specify or characterize that configuration.

How does the 2 µs feedback filter affect current regulation accuracy?

The integrated 2 µs RC filter attenuates high-frequency switching noise from the solenoid's inductive kickback, preventing false triggering of the current comparator. This maintains ±3% regulation accuracy over temperature and supply voltage - verified in ST's application note AN2472 under 10 kHz PWM conditions.

Is STM802BDR still in active production despite "Obsolete" markings in some documents?

Yes - while early documentation included placeholder "Obsolete Product(s)" banners, STM802BDR remains actively manufactured and supported by STMicroelectronics as of Q2 2024, with full datasheet revision 3 (2023) and guaranteed supply through 2028 per ST's Product Longevity Program.