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

STMicroelectronics L9848

Name: L9848
Brand: STMicroelectronics
SKU: L9848
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: L9848

Manufacturer:: STMicroelectronics

Category:: Power Distribution Switches, Load Drivers

Package:: 28-SOIC (0.295", 7.50mm Width)

Datasheet:: L9848.pdf

Description:: IC PWR DRIVER 1:8 28SO

Quantity:: RFQ Add To RFQ list

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Inventory:1,554

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Product details

Overview

L9848 from STMicroelectronics is an octal configurable low/high side driver IC for automotive body electronics, featuring up to six reconfigurable outputs (1–6), two dedicated low-side outputs (7–8), 1.5 Ω max R_DS(ON) at 25 °C, 0.8 A min current limit per channel, and SPI-controlled operation with PWM capability on outputs 5–6.

For engineers reviewing the L9848 datasheet, L9848 pinout, L9848 application, or L9848 equivalent, this device supports flexible load driving in mirror control, window lift, bulb management, and stepper motor sequencing - with integrated open-load detection, thermal shutdown, reverse-battery protection, and ±30–35 V output clamping.

Technical Context

The L9848 implements eight independent MOSFET driver channels: outputs 1–6 are self-configuring (automatically detect high/low-side load topology), while outputs 7–8 are fixed low-side. Each configurable output includes dual current sources for open-load detection and internal clamping circuits limiting transient voltages to −30 V (high-side mode) or +35 V (low-side mode).

SPI interface enables serial command/control of all outputs and fault reporting; IN5/IN6 pins provide hardware-level PWM override for outputs 5–6. Thermal shutdown activates at 155–185 °C junction temperature with 5–15 K hysteresis, and supply operates strictly within 4.75–5.25 V (V_DD), while load-side battery voltage ranges 9–18 V.

Key Specifications

Parameter	Value and Actual Design Meaning
R_DS(ON) max	1.5 Ω at T_j = 25 °C - ensures low conduction loss and <1.2 W dissipation per channel at 0.8 A
Current limit min	0.8 A - provides robust short-circuit protection without external sensing components
V_DD range	4.75–5.25 V - tightly regulated logic supply enabling compatibility with 5 V microcontrollers
Output clamp (HS/LS)	−30 V / +35 V - protects against negative transients (e.g., load dump reversal) and inductive flyback
SPI interface	8-bit command register with DO/CS/DI/SCLK - supports daisy-chaining and real-time fault status readback
PWM inputs	IN5 & IN6 - enable hardware-level pulse-width modulation on outputs 5–6, bypassing SPI latency
Thermal shutdown	155–185 °C activation - prevents latch-up or permanent damage during sustained overload

Pinout & Package

SO-28 surface-mount package with exposed thermal pad (mechanical drawing per ST Doc AN4283); 28-pin layout optimized for automotive PCB routing and thermal dissipation under continuous 350 mA/channel load.

Pin/Terminal	Circuit Role	Design Meaning
GND (Pin 1)	Analog ground reference	Common return path for internal biasing and SPI signal integrity; must be low-impedance connection
VDD (Pin 2)	5 V logic supply input	Power source for internal logic, SPI interface, and gate drivers; decoupling capacitor required
DRN1–DRN6 (Pins 5,7,11,18,22,24)	Drain terminals for configurable outputs	Connect to load (low-side) or battery (high-side); clamped to +35 V or −30 V during transients
SRC1–SRC6 (Pins 4,6,10,19,23,25)	Source terminals for configurable outputs	Return path for high-side loads; internally pulled to GND when configured as low-side
DRN7–DRN8 (Pins 3,26)	Fixed low-side drain outputs	Dedicated sink paths for lamps or relays; no high-side configuration possible
IN5/IN6 (Pins 9,20)	Hardware PWM enable inputs	OR logic with SPI command - allows real-time override of outputs 5–6 without SPI transaction delay
CS/DI/SCLK/DO (Pins 16,15,14,28)	SPI interface signals	Enable daisy-chain configuration; DO supports cascaded fault reporting across multiple devices

Key Features

Feature	Design Value
Self-configuring outputs 1–6	Automatically adapts drive topology (high/low side) based on external load connection - eliminates manual configuration registers
Integrated open-load detection	Dual current sources on SRC/DRN pins detect open circuit in both high- and low-side modes without external components
Reverse battery protection	Withstands −13.5 V applied to SRC/DRN pins - critical for automotive environments with accidental polarity reversal
Loss-of-ground operation	Continues safe operation even if GND connection degrades - maintains fault reporting and shutdown behavior
Waveshaping control	Programmable slew rates (10–100 µs) reduce EMI during switching of inductive loads like motors and solenoids

Applications

Mirror Axis Control

Window Lift Relay Driving

Use Scenario: Bidirectional control of electrochromic or motorized rearview mirror positioning.

IC Role / Device Role / Timing Role: Configures outputs 1–4 as H-bridge half-bridges to drive mirror actuator coils with direction and current limiting.

Use Value: Eliminates discrete H-bridge ICs; integrated clamping handles coil flyback without external diodes.

Use Scenario: Driving 12 V DC window lift relays in door modules with diagnostic feedback.

IC Role / Device Role / Timing Role: Uses outputs 7–8 as dedicated low-side switches for relay coils; SPI reports open-load faults during idle state.

Use Value: Reduces BOM count by replacing relay drivers + sense resistors + protection diodes with single IC.

Incandescent Bulb Management

Bipolar Stepper Motor Sequencing

Use Scenario: On/off and dimming control of interior lighting (dome, map, courtesy bulbs) with inrush current limiting.

IC Role / Device Role / Timing Role: Configures outputs 1–6 as high-side drivers; IN5/IN6 enable PWM dimming on two channels.

Use Value: Built-in current limit prevents filament burnout during cold-start surge; thermal shutdown avoids overheating.

Use Scenario: Sequential unipolar/bipolar stepping for HVAC damper actuators using three 2-phase motors.

IC Role / Device Role / Timing Role: Assigns outputs 1–6 as full H-bridge pairs; uses SPI timing commands to coordinate phase sequencing.

Use Value: Enables precise microstepping via software-controlled slew rate and delay parameters - no external timing IC needed.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal configurable driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TLE6240GP	8-channel high-side-only driver; no low-side or configurable outputs; higher R_DS(ON) (2.5 Ω typ)	Lacks self-configuration and IN5/IN6 PWM override; requires external open-load detection circuitry	Select when only high-side driving is needed and system-level diagnostics are handled externally
VNQ5E050K-E	Quad high-side driver with embedded SPI; no configurable topology or PWM inputs; lower channel count (4 vs 8)	Designed for safety-critical ASIL-B systems; includes enhanced diagnostics but no multi-topology flexibility	Prefer for ISO 26262-compliant subsystems where functional safety outweighs configurability needs

Compared with TLE6240GP and VNQ5E050K-E, the L9848 uniquely combines topology adaptability, hardware PWM override, and integrated open-load detection across eight channels - making it optimal for cost-sensitive, space-constrained automotive body controllers requiring mixed load types.

Availability

L9848 is available at Aetrix Electronics and suitable for automotive mirror control, window lift relay driving, incandescent bulb management, and bipolar stepper motor sequencing requiring stable component supply across production lifecycles.

Supply support for L9848 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, specializing in automotive, industrial, and power management ICs with broad AEC-Q100 qualification coverage.

The L9848 belongs to ST's automotive smart-power driver product line, designed specifically for body electronics modules needing flexible, fault-resilient load control without external protection components.

FAQ

What is the maximum allowable battery voltage applied to DRN pins?

The absolute maximum rating for DRN1–DRN6 is 60 V under transient conditions and 18 V under normal operation. Sustained operation above 18 V risks exceeding thermal limits and invalidating parametric guarantees - the device remains functional down to 6.8 V VBatt but does not meet all specifications below 9 V.

Can outputs 1–4 be used for PWM without external components?

No - only outputs 5 and 6 support hardware PWM via IN5/IN6 pins. Outputs 1–4 are SPI-controlled only; achieving PWM on them requires rapid SPI write cycles, which introduces latency and increases MCU overhead versus direct pin-driven PWM.

How does open-load detection work in high-side configuration?

In high-side mode, the L9848 applies a 10 µA current source from SRC to GND and monitors DRN voltage. If DRN remains near VBatt (no load), the voltage exceeds threshold and triggers open-load fault; dual sourcing ensures reliable detection regardless of topology.

Is daisy-chaining supported, and what is the maximum number of L9848s?

Yes - daisy-chaining is supported via DO-to-DI connection between devices. The maximum number is limited by SPI bus capacitance and timing margins; ST recommends ≤5 devices per chain to maintain t_DOacc < 30 ns and avoid setup/hold violations at 10 MHz SCLK.

L9848 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 28-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:: High Side or Low Side

Output Type:: -

Interface:: SPI

Voltage - Load:: 4.75V ~ 5.25V

Voltage - Supply (Vcc/Vdd):: -

Current - Output (Max):: 800mA

Rds On (Typ):: 1.5Ohm (Max)

Input Type:: -

Features:: PWM Input

Fault Protection:: Current Limiting (Fixed), Open Load Detect, Over Temperature

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 28-SO

L9848 FAQ

1.How can I place an order for L9848 through Aetrix?

Please submit a Request for Quotation (RFQ) for L9848 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 L9848 reliable?

The price and inventory of L9848 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for L9848 is usually 5 days.

3.What payment methods are accepted for L9848?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for L9848 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for L9848?

L9848 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your L9848 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 L9848?

For technical support, including L9848 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your L9848 requirements.

6.How does Aetrix verify that L9848 is sourced from the original manufacturer or authorized distributors?

All L9848 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 L9848 meets industry standards.

7.What is the process for return or replacement of L9848?

All L9848 units undergo pre-shipment inspection (PSI). If there is an issue with L9848, 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 L9848 part is unused and in its original packaging.

Return procedure for L9848:

1.Submit a request within 90 days.

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

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