STMicroelectronics L9822N013TR

Overview

L9822N013TR from STMicroelectronics is an octal low-side solenoid driver IC in PowerSO-20 package, featuring eight 0.53 Ω (typ.) DMOS outputs rated for 500 mA continuous load current, SPI serial interface (up to 2 MHz), and integrated diagnostic feedback via serial output for open-circuit and overload detection. It is designed for automotive body control modules driving solenoids, relays, and lamps.

For engineers reviewing the L9822N013TR datasheet, L9822N013TR pinout, L9822N013TR application, or L9822N013TR equivalent, key selection criteria include R_DS(on) at 1 A, 35 V internal clamping per output, fault reset timing (75–250 µs), CE-controlled latch/shift synchronization, and SO diagnostic bit mapping to individual output voltage states.

Technical Context

The L9822N013TR implements a three-block architecture: an 8-bit shift register for SPI data ingestion and diagnostic readback, a parallel latch for output state retention, and eight independent low-side DMOS drivers with per-channel voltage comparators. Each comparator monitors output voltage against a 1.6–2.0 V threshold to detect overvoltage faults during ON-state operation.

Diagnostic data is captured on the falling edge of CE and shifted out on SO synchronized to SCLK rising edges; control data is latched into outputs on the rising edge of CE after a 75–250 µs fault-reset delay. The device supports daisy-chaining via SI/SO and uses Multipower-BCD technology for robust thermal performance (R_{th j-case} = 1.5 °C/W).

Key Specifications

Pinout & Package

Package: PowerSO-20 (thermally enhanced exposed pad, 20-pin surface-mount with integrated heatsink capability).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE6232GP and ULN2803A, L9822N013TR uniquely balances SPI configurability, per-channel diagnostic visibility, and automotive-grade transient protection in a single PowerSO-20 package-making it optimal for space-constrained, serviceable, and ECU-integrated solenoid control.

Availability

L9822N013TR is available at Aetrix Electronics and suitable for automotive body control modules, industrial valve sequencing, commercial vehicle lighting systems, and off-highway equipment requiring stable component supply across extended temperature ranges (–40 °C to +125 °C).

Supply support for L9822N013TR 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, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing and AEC-Q100 qualified product lines.

L9822N013TR belongs to ST's Automotive Power Drivers family, engineered specifically for robust, SPI-controlled low-side switching in harsh 12 V vehicle environments with emphasis on fault resilience and system-level diagnostics.

FAQ

What is the maximum continuous current per channel for L9822N013TR?

The L9822N013TR supports 500 mA continuous current per channel at T_j ≤ 125 °C with proper PCB copper pour and thermal vias under V_CC = 5 V. Peak pulsed current up to 1 A is allowed for ≤100 ms with duty cycle ≤10%, provided junction temperature remains within limits.

How does the diagnostic feedback work during SPI communication?

On the falling edge of CE, the voltage comparator status of all eight outputs is loaded into the shift register. During subsequent SCLK rising edges, these bits appear on SO: '1' indicates output voltage >1.8 V (ON-state fault or open load), '0' indicates ≤1.8 V (normal OFF or loaded ON state). This enables closed-loop verification without additional sensors.

Can L9822N013TR drive inductive loads without external flyback diodes?

Yes - each output integrates a 35 V zener clamp that safely recirculates inductive energy during turn-off. This eliminates the need for external flyback diodes when driving solenoids or relays with stored energy ≤20 mJ per channel, as specified in the EOC parameter.

Is daisy-chaining multiple L9822N013TR devices supported, and how is synchronization managed?

Yes - daisy-chaining is fully supported via SI-to-SO connection between devices. All devices share the same SCLK and CE signals. Diagnostic and control data propagate through the chain synchronously; the first device's SO connects to the next device's SI, preserving bit order and timing alignment across up to N devices using one SPI interface.