STMicroelectronics L9823013TR

Overview

L9823013TR from STMicroelectronics is an octal low-side driver IC designed for automotive bulb, resistive, and inductive load control. It delivers 0.5 A per channel, features cascaded SPI interface up to 3.0 MHz, provides programmable 50 V output clamping, includes independent thermal shutdown (SOA protection), and supports open-load detection with diagnostic feedback via SPI. It is used in vehicle lighting modules and body control units where robust fault management and serial configurability are required.

For engineers reviewing the L9823013TR datasheet, L9823013TR pinout, L9823013TR application, or L9823013TR equivalent, this page details its automotive-grade low-side switching architecture, real-time diagnostics, SFPD-configurable short-circuit response, and SO24 package integration - all critical for BCU, lighting ECU, and chassis electronics design.

Technical Context

The L9823013TR implements eight independent N-channel power switches with integrated flyback voltage clamping (typ. 50 V) and dual-mode overcurrent protection: latch-off when SFPD = low, or sustained current limiting when SFPD = high. Its SPI interface uses CSB-latched 8-bit shift registers with MSB-first protocol, enabling daisy-chain configuration across multiple devices.

Diagnostic functionality operates in two modes: open-load/short-to-GND detection during OFF state (using 60 µA sink current), and overcurrent/thermal fault reporting during ON state. Fault status is read back via SO pin synchronized to SCLK rising edges, with built-in digital filtering ensuring reliable data transfer at up to 3 MHz clock rate.

Key Specifications

Pinout & Package

Package: SO24 (Small Outline, 24-pin, 0.60 mm pitch, 15.4 mm × 7.5 mm body). RoHS-compliant, thermally enhanced leadframe for improved junction-to-lead thermal resistance (R_thjL-all ≤ 20 °C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLE6232G and BD82002FV-M, the L9823013TR uniquely combines per-output SPI-accessible diagnostics, hardware-selectable short-circuit behavior, and automotive-grade thermal resilience - making it the only option qualified for safety-critical lighting and chassis control where fault visibility and operational continuity are mandatory.

Availability

L9823013TR is available at Aetrix Electronics and suitable for automotive lighting control, body control modules, and engine bay solenoid applications requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.

Supply support for L9823013TR 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 broad manufacturing scale and automotive qualification expertise.

The L9823013TR belongs to ST's L98xx family of automotive smart power drivers - engineered specifically for robust, diagnostic-rich load control in vehicle body electronics and lighting systems operating across extended temperature and voltage ranges.

FAQ

What is the maximum allowable VDD supply voltage for L9823013TR?

The absolute maximum VDD rating is 7 V, but the device is specified for operation between 4.5 V and 5.5 V. Operation above 5.5 V risks violating electrical characteristics and may trigger undervoltage reset behavior unpredictably. For automotive 12 V systems, a regulated 5 V supply is required - direct connection to unregulated battery rails is not supported.

Can L9823013TR drive inductive loads without external flyback diodes?

Yes - its integrated 50 V output clamp enables safe flyback current recirculation for inductive loads such as relays and solenoids. This eliminates the need for external diodes in most automotive applications, provided the clamp energy (≤50 mJ per pulse) and peak current (≤2 A) remain within datasheet limits. External clamping is still recommended for highly repetitive or high-energy inductive switching.

How does the SFPD pin affect short-circuit response?

When SFPD is grounded, the device immediately latches off any output exceeding 0.5–2.5 A (depending on temperature), isolating the fault. When SFPD is tied to VDD, the output enters current-limit mode instead - sustaining ~0.5 A until thermal shutdown occurs (~155°C). This allows incandescent lamps to ignite without false triggering during high inrush.

Is L9823013TR compatible with 3.3 V microcontrollers?

Yes - its digital inputs (CSB, SCLK, SI, RESET, SFPD) accept 3.3 V logic levels when VDD = 5 V, as VINH minimum is 0.7×VDD (3.5 V) and VINL maximum is 0.2×VDD (1.0 V). A 3.3 V MCU can directly interface without level-shifting, though timing margins should be verified against t_clh/t_cll (≥160 ns) and setup/hold requirements.