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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Power Distribution Switches, Load Drivers

STMicroelectronics E-L9823

Name: E-L9823
Brand: STMicroelectronics
SKU: E-L9823
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: E-L9823

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 24-SOIC (0.295", 7.50mm Width)

Datasheet:: E-L9823.pdf

Description:: IC PWR DRIVER N-CHANNEL 1:8 24SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,185

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Product details

Overview

E-L9823 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, programmable 50 V output clamping, independent thermal shutdown, and open-load detection - enabling robust control of headlamps, fog lamps, and solenoids in 12 V vehicle systems.

For engineers reviewing the E-L9823 datasheet, E-L9823 pinout, E-L9823 application, or E-L9823 equivalent, this page provides verified technical context, real-world diagnostic behavior, SO24 package layout, automotive-grade protection architecture, and validated alternatives for lamp and solenoid drive designs requiring fault reporting and flyback energy management.

Technical Context

The E-L9823 implements eight independent N-channel DMOS power switches with integrated voltage clamping (typ. 50 V) to recirculate flyback current from inductive loads. Each output includes dedicated overcurrent sensing with latch-off (SFPD = low) or sustained current-limit mode (SFPD = high), plus thermal shutdown at 155–180 °C.

Control uses a daisy-chainable 8-bit SPI interface with CSB-selectable timing: data shifts in on SCLK falling edge (SI), status shifts out on rising edge (SO), and latching occurs on CSB rising edge. Diagnostics report open-load (60 µA sink), short-to-battery, and thermal faults via the same serial bus.

Key Specifications

Parameter	Value and Actual Design Meaning
Output current	0.5 A continuous per channel - supports incandescent bulbs and small solenoids without external heatsinking.
Output clamp voltage	Typ. 50 V - safely absorbs flyback energy from 12 V automotive inductive loads (e.g., fuel injectors, relays).
SPI clock frequency	Up to 3.0 MHz - enables fast configuration and status polling in real-time body control modules.
Standby current	Typ. 35 µA at VDD < 0.5 V with RESET low - meets automotive low-power sleep mode requirements.
Diagnostic threshold	0.55 × VDD - enables reliable open-load detection even with battery voltage variation (9–16 V).
R_DS(on)	1.25 Ω max at T_j = 150 °C - ensures <1 W conduction loss per channel at 0.5 A, simplifying thermal design.
Short-circuit response	70–250 µs delay before latch-off (SFPD = low) - avoids false trips during lamp inrush while protecting against hard shorts.

Pinout & Package

Package: SO24 (Small Outline, 24-pin, 0.6 mm pitch, 15.4 mm × 7.5 mm body). RoHS-compliant, thermally enhanced leadframe for improved junction-to-lead thermal resistance (R_thjL ≤ 25 °C/W per output).

Pin	Circuit Role	Design Meaning
OUT0–OUT7	Power output terminals	Eight independent low-side switch drains - directly drive loads to GND; each supports -1.5 V reverse voltage tolerance.
CSB	Chip select (active low)	Enables SPI communication and controls latching of control data (rising edge) and loading of status data (falling edge).
SCLK	Serial clock input	Clocks SI data in (falling edge) and SO data out (rising edge); must be low during CSB transitions to prevent false reads/writes.
SI	Serial data input	Accepts 8-bit control word MSB-first (OUT7 to OUT0); logic level sets corresponding output ON (low) or OFF (high).
SO	Serial data output	Tri-state output reporting 8-bit status register (MSB-first); high = no fault (OFF) or short-to-battery (ON); low = correct ON or open-load (OFF).
SFPD	Short-fault protect disable	Ground = latch-off on overcurrent; tie to VDD = current-limit mode - selectable per system for lamps vs. solenoids.
RESET	Active-low reset input	Clears shift register and forces all outputs OFF; internal pull-down ensures safe default state during MCU boot.
VDD / GND	Logic supply / ground	Single 4.5–5.5 V supply powers logic and gate drivers; multiple GND pins reduce ground bounce in high-current switching.

Key Features

Feature	Design Value
Programmable output clamping	50 V typical clamp voltage - eliminates need for external flyback diodes when driving relays or coils.
Per-output thermal shutdown	Independent SOA protection triggers at 155–180 °C - prevents single-fault cascade across channels.
Open-load detection	60 µA diagnostic sink per output - detects broken filaments or disconnected solenoids with no added components.
Cascadable SPI interface	SO pin daisy-chains to next device's SI - enables control of >8 outputs using only 4 MCU pins (CSB, SCLK, SI, SO).
Undervoltage reset	Internal reset activates below 2.5 V VDD - ensures predictable OFF-state behavior during brownout or cold-cranking.

Applications

Automotive Lighting Control

Engine Management Actuators

Use Scenario: Driving halogen headlamps, fog lamps, and parking lights in modern body control modules (BCM).

IC Role / Device Role / Timing Role: Low-side switch providing PWM-compatible ON/OFF control, fault reporting, and inrush current handling for 12 V filament loads.

Use Value: Eliminates discrete protection circuitry while delivering open-load detection to flag burnt-out bulbs before driver failure.

Use Scenario: Controlling fuel injectors, idle air control valves, and turbocharger vanes in engine ECUs.

IC Role / Device Role / Timing Role: Inductive load driver with integrated 50 V flyback clamping and thermal monitoring for precise solenoid actuation.

Use Value: Absorbs flyback energy internally - removes need for external snubbers and reduces PCB area by >30% versus discrete solutions.

Commercial Vehicle Body Systems

Industrial Valve & Relay Panels

Use Scenario: Managing cab lighting, marker lamps, and auxiliary power distribution in trucks and buses.

IC Role / Device Role / Timing Role: Fault-tolerant octal driver supporting CAN-based diagnostics via SPI-read status registers.

Use Value: Enables centralized fault logging (e.g., "OUT3 open load") without adding microcontroller GPIO overhead.

Use Scenario: Replacing electromechanical relay banks in industrial PLC I/O modules and HVAC control panels.

IC Role / Device Role / Timing Role: Solid-state replacement for 8 SPST relays, offering faster switching, longer life, and built-in diagnostics.

Use Value: Reduces MTBF risk by detecting coil opens and contact welds via real-time SO-reported status bits.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE6232GP	Higher R_DS(on) (1.8 Ω typ), no open-load detection, fixed 40 V clamp	Lacks diagnostic reporting; requires external circuitry for open-load sensing	Choose for cost-sensitive non-diagnostic applications where 40 V clamp suffices.
BD8960GUL	Lower current rating (0.35 A), no thermal shutdown per channel, 3.3 V logic only	Not suitable for 12 V automotive loads; limited to low-power industrial sensors	Use only in 3.3 V embedded systems with light resistive loads and no thermal stress.

Compared with TLE6232GP and BD8960GUL, the E-L9823 uniquely combines per-channel thermal shutdown, programmable SFPD behavior, and integrated open-load detection - making it the only option among the three qualified for ASIL-B-relevant lamp and solenoid control where fault coverage is mandatory.

Availability

E-L9823 is available at Aetrix Electronics and suitable for automotive lighting control, engine actuator drive, commercial vehicle body systems, and industrial valve/relay panel applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for E-L9823 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 and qualification expertise.

The L9823 belongs to ST's automotive-grade power driver product line, engineered specifically for AEC-Q100 Grade 0/1 compliance and designed to replace electromechanical relays in safety-critical lighting and actuation systems.

FAQ

What is the maximum safe operating temperature for E-L9823 outputs?

The E-L9823 features independent thermal shutdown triggered between 155 °C (min) and 180 °C (typ) junction temperature per output. Operation above 150 °C ambient requires derating per SO24 thermal resistance (R_thjL ≤ 25 °C/W per channel), and full 0.5 A load should be limited to ≤105 °C case temperature to maintain reliability.

Can E-L9823 drive LED loads directly?

No - E-L9823 is not optimized for constant-current LED drive. Its 0.5 A rating and 1.25 Ω R_DS(on) are intended for resistive and inductive loads like bulbs and solenoids. For LEDs, external current-limiting resistors or dedicated LED drivers are required to avoid thermal overstress and ensure stable brightness.

How does SFPD pin selection affect inrush current handling for halogen lamps?

When SFPD is tied to VDD, the E-L9823 enters current-limit mode during lamp inrush (up to 10× steady-state current), sustaining ~0.5 A until the filament warms. When SFPD is grounded, inrush exceeding 0.5–2.5 A triggers immediate latch-off - making VDD tie essential for lamp applications to avoid nuisance shutdowns.

Is daisy-chaining multiple E-L9823 devices supported in hardware?

Yes - the SO pin is tri-state and electrically compatible with the SI pin of the next device. With proper signal integrity (controlled impedance, <10 cm trace length, series termination), up to 8 E-L9823s can be cascaded using one CSB/SCLK pair, reducing MCU pin count and simplifying PCB routing for multi-zone lighting systems.

E-L9823 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 24-SOIC (0.295", 7.50mm Width)

Series:: -

Packaging:: Tube

Product Status:: Active

Switch Type:: General Purpose

Number of Outputs:: 8

Ratio - Input:Output:: 1:8

Output Configuration:: Low Side

Output Type:: N-Channel

Interface:: SPI

Voltage - Load:: 4.5V ~ 5.5V

Voltage - Supply (Vcc/Vdd):: -

Current - Output (Max):: 500mA

Rds On (Typ):: 800mOhm

Input Type:: -

Features:: -

Fault Protection:: Current Limiting (Fixed), Over Temperature

Operating Temperature:: -40°C ~ 150°C (TJ)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-SO

E-L9823 FAQ

1.How can I place an order for E-L9823 through Aetrix?

Please submit a Request for Quotation (RFQ) for E-L9823 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for E-L9823 reliable?

The price and inventory of E-L9823 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for E-L9823 is usually 5 days.

3.What payment methods are accepted for E-L9823?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for E-L9823 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for E-L9823?

E-L9823 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your E-L9823 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for E-L9823?

For technical support, including E-L9823 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your E-L9823 requirements.

6.How does Aetrix verify that E-L9823 is sourced from the original manufacturer or authorized distributors?

All E-L9823 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that E-L9823 meets industry standards.

7.What is the process for return or replacement of E-L9823?

All E-L9823 units undergo pre-shipment inspection (PSI). If there is an issue with E-L9823, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The E-L9823 part is unused and in its original packaging.

Return procedure for E-L9823:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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