STMicroelectronics L9822EPD013TR

Overview

L9822EPD013TR from STMicroelectronics is an octal low-side solenoid driver IC in PowerSO-20 package, featuring eight 0.5 Ω (at 1 A, 25°C) DMOS outputs, SPI serial interface, and real-time diagnostic feedback via 8-bit serial output. It drives automotive solenoids, relays, and lamps with integrated short-circuit protection, 36 V clamping, and fault detection for open/overload conditions.

For engineers reviewing the L9822EPD013TR datasheet, L9822EPD013TR pinout, L9822EPD013TR application, or L9822EPD013TR equivalent, this page delivers verified electrical specs, thermal data, SPI timing constraints, fault reset behavior, and cascading configuration guidance for automotive body control modules.

Technical Context

The L9822EPD013TR implements a three-block architecture: an 8-bit shift register for SPI data ingestion (SI/SCLK/CE), a parallel latch holding output states, and eight independent DMOS drivers with per-channel voltage comparators. Each output monitors its own node for >1.8 V during ON state to detect overload or open-circuit faults.

Diagnostic data is captured on CE falling edge and shifted out via SO; control data is latched into outputs on CE rising edge after a 75–250 µs fault-reset delay. The device supports daisy-chaining via SI/SO and uses Multipower-BCD technology for robustness in 12 V automotive environments with junction temperatures up to 150°C.

Key Specifications

Pinout & Package

Package: PowerSO-20 (JEDEC MO-166), thermally enhanced surface-mount package with exposed die pad for R_{th j-case} = 1.5 °C/W.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPL7407LPWR and TPIC6B595N, the L9822EPD013TR uniquely integrates per-output 36 V clamping, 1.8 V fault threshold comparators, and diagnostic bit streaming - enabling true predictive maintenance and ASIL-compliant operation in automotive solenoid systems.

Availability

L9822EPD013TR is available at Aetrix Electronics and suitable for automotive body control modules, commercial vehicle braking systems, and industrial PLC output stages requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified performance.

Supply support for L9822EPD013TR 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade analog devices.

The L9822EPD013TR belongs to ST's Automotive Power Drivers product line, engineered specifically for robust, diagnostic-capable load switching in 12 V/24 V vehicle networks under harsh thermal and EMI conditions.

FAQ

What is the maximum continuous current per channel, and how is overcurrent handled?

Each output supports 1.05 A minimum continuous current with internal analog current limiting. When exceeded, the DMOS transistor enters linear regulation to hold current constant-no shutdown occurs. This allows temporary inrush tolerance while preventing thermal runaway. Fault detection relies on voltage monitoring, not current measurement.

How does the diagnostic feedback work, and what fault conditions does it detect?

The SO pin shifts out 8 bits corresponding to OUT7–OUT0. A '1' indicates the output node voltage exceeds 1.8 V while programmed ON (overload/short), or floats high while programmed OFF (open circuit). A '0' confirms correct low-side switching. This enables software-based root-cause analysis without external ADCs or comparators.

Can multiple L9822EPD013TR devices be cascaded, and what SPI configuration is required?

Yes-connect SO of one device to SI of the next, share SCLK and CE, and drive CE synchronously. Each device adds 8 bits to the SPI frame. The MCU must shift 8×N bits per transaction, with MSB-first order preserved. No additional control lines or address decoding are needed, simplifying multi-channel expansion.

What thermal derating applies when operating at 125°C junction temperature?

At T_j = 125°C, R_DS(on) increases to ~0.75 Ω (typical), raising conduction loss by ~50%. With R_{th j-amb} = 60 °C/W in PowerSO-20, maximum continuous current per channel drops to ~0.75 A to maintain T_j ≤ 150°C at 70°C ambient. Forced airflow or PCB copper pour is recommended for full-load operation above 85°C ambient.