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L9825TR
L9825TR
| Part Number | L9825TR |
|---|---|
| Manufacturer | STMicroelectronics |
| Category | Integrated Circuits (ICs) > PMIC – Power Distribution Switches, Load Drivers |
| Description | Octal low-side driver with serial peripheral interface (SPI) and built-in diagnostic safety protections for automotive loads. |
| Stock Status | In Stock |
| Origin | Original Factory |
Product Overview
The L9825TR is an automotive-grade, highly integrated octal low-side driver circuit engineered by STMicroelectronics. Specifically optimized to drive relays, solenoids, stepper motors, and small DC motors within harsh vehicular environments, this device packs eight independent power DMOS transistors on-chip. System control is managed through a high-speed Serial Peripheral Interface (SPI) and parallel control inputs, which drastically reduces the micro-control pin overhead required by standard parallel systems. The features a suite of autonomous safety diagnostics capable of detecting open load faults, short circuits to VCC, and over-temperature occurrences. Housed in a thermally efficient SOIC-20-EP-11mm (PowerSO-20) surface-mount layout and shipped in tape-and-reel configuration (indicated by the “TR” suffix), this driver stands as a reliable, rugged solution for automotive body electronics, chassis power management, and industrial load switching matrix networks.
Core Advantages
Eight Channel Space Optimization
Consolidates eight rugged DMOS low-side switches into a singular, compact package. This multi-channel layout optimizes component density, lowers layout complexity, and reduces total printed circuit board space constraints.
SPI + Parallel Dual Control Interface
Supports both serial peripheral interface (SPI) and parallel input control logic, offering flexible design options. Inputs are compatible with both low-active and high-active logic, simplifying integration with various microcontrollers.
Comprehensive Smart Diagnostics
Integrates sophisticated real-time sensing mechanisms capable of detecting open loads, short-to-ground paths, and thermal overloads, which immediately triggers shutdown safeguards to prevent permanent subsystem damages.
Automotive Thermal Reliability
Engineered with a low on-resistance profile and robust clamp networks, minimizing localized power dissipation. This ensures continuous, uninterrupted performance across fluctuating voltage grids and severe thermal gradients.
Key Specifications
| Brand | STMicroelectronics |
|---|---|
| RoHS Status | RoHS Compliant / Lead-Free |
| EDA/CAD Model | 3D Model & PCB Footprint Available upon request |
| Warranty | 1-Year Standard Factory Warranty |
| Package / Case | SOIC-20-EP-11mm (PowerSO-20) |
| Mounting Type | Surface Mount (SMD/SMT) |
| Surface Marking / Silkscreen | L9825 Marking |
| Switch Configuration Type | Low-Side Driver (Octal Output Matrix Layout) |
| Output Current Rating | Max 1.0A Continuous per channel / 1.4A Pulsed Current limit |
| On-State Resistance (RDS_on) | Typical 0.34Ω (Max 0.75Ω at extreme thermal boundaries) |
| Operating Voltage Range | Logic: 4.5V to 5.5V, Load Maximum Voltage: 45V |
| Bus Interface Type | Serial Peripheral Interface (SPI) with Daisy-Chain Capability + Parallel Input Support |
| Input Control Logic | Compatible with both low-active and high-active logic levels |
| Active Fault Protections | Thermal Overload Shutdown, Overcurrent Protection, Over-Voltage Clamp |
| Operating Temperature Range | -40°C to +150°C (Automotive Junction Grade Profile) |
Typical Applications
- Automotive Relay Drivers, Solenoid Controllers, and Electronic Valve Actuators
- Car Body Comfort Electronics, Central Locking Nodes, and Power Window Modules
- Industrial Programmable Logic Controllers (PLCs) and Smart Matrix Load Switching
- Multi-Phase Stepper Motor Commutators and Low-Current DC Fan Drives
- Automotive Dashboard Instrumentation Displays and LED Indicator Panel Arrays
Order & Shipping Info
| Minimum Order Quantity (MOQ) | 1 Piece |
|---|---|
| Shipping Time | Shipped within 1-2 business days |
| Delivery Time | 3-7 working days worldwide |
| Shipping Methods | DHL, UPS, FedEx, EMS |
| Payment Methods | T/T (Bank Transfer), PayPal, Credit Card, Western Union |
Technical Support
For datasheet, sample requests, stock check, or bulk pricing, please use the Quick Inquiry form. We will reply within 24 hours.
Frequently Asked Questions
Q1: Is your current stock inventory of the L9825TR brand new and authentic?
A: Yes, we guarantee that all L9825TR octal drivers are 100% original, factory-new components manufactured by STMicroelectronics, strictly maintained under ESD anti-static tape-and-reel standard conditions.
Q2: What exact packaging format variation does the “TR” suffix denote?
A: The “TR” suffix denotes that these ICs are packaged and distributed in Tape and Reel formats, which is highly optimized for automatic pick-and-place assembly machine setups.
Q3: Can multiple L9825TR driver chips be controlled via a single SPI bus line?
A: Yes, the L9825TR natively supports standard daisy-chaining operations via its serial peripheral interface. This allows developers to cascade several drivers back-to-back while maintaining minimal Chip Select (CS) pin overhead on the microcontroller.
Q4: How does the driver handle inductive voltage kicks when turning off relays or solenoids?
A: Every independent channel inside the L9825TR is designed with a robust built-in hardware voltage clamping network (typically rated up to 45V). This safely dissipates inductive energy spikes without the need for external freewheeling flyback diodes.
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