Hardware Setup

This guide covers the physical connections and hardware requirements for the TLE92466ED Six-Channel Low-Side Solenoid Driver IC.

Pin Connections

Basic SPI Connections

text MCU TLE92466ED ───────────────────────── 3.3V/5V ────── VIO GND ────── GND 5.5-41V ────── VBAT SCK ────── SCK MOSI ────── SI MISO ────── SO CS ────── CSN cpp

Control Pins

text MCU TLE92466ED ───────────────────────── GPIO ────── RESN (optional, active low reset) GPIO ────── EN (optional, active high enable) GPIO ────── FAULTN (optional, active low fault output) cpp

Pin Descriptions

Pin Name Description Required
VBAT Power Battery voltage supply (5.5V - 41V) Yes
VIO Power SPI I/O voltage (3.0V - 5.5V, typically 3.3V or 5.0V) Yes
VDD Power Internal 5V supply output (max 10mA load) No
GND Ground Ground reference Yes
SCK Clock SPI clock line (up to 10 MHz) Yes
SI Data In SPI data input (MOSI) Yes
SO Data Out SPI data output (MISO) Yes
CSN Chip Select SPI chip select (active low) Yes
RESN Reset Active-low reset (optional) No
EN Enable Active-high global enable (optional) No
FAULTN Fault Active-low fault indication (open drain, optional) No
OUT0-5 Outputs Low-side switch outputs (6 channels) Yes

Power Requirements

  • VBAT (Battery Supply): 5.5V - 41V (12V or 24V typical for automotive)
  • VIO (I/O Supply): 3.0V - 5.5V (3.3V or 5.0V typical)
  • VDD (Internal 5V): Output from IC, max 10mA load
  • Current per Channel: Up to 2A single channel, 4A parallel mode
  • Power Supply: Clean supply with decoupling capacitors (100nF ceramic + 10µF tantalum recommended)

SPI Configuration

  • Mode: SPI Mode 1 (CPOL=0, CPHA=1)
  • Speed: Up to 10 MHz
  • Bit Order: MSB first
  • CS Polarity: Active low (CSN)
  • Data Format: 32-bit frames with 8-bit CRC (SAE J1850)
  • Frame Structure: CRC[31:24] + Address[23:17] + R/W[16] + Data[15:0]

Load Connections

Single Channel Mode

Connect the load between OUTx and VBAT (or positive supply):

cpp VBAT ────[Load]──── OUTx ──── GND cpp

Parallel Channel Mode

For higher current, connect channels in parallel (pairs: 0/3, 1/2, 4/5):

cpp VBAT ────[Load]──── OUT0 ──── GND └──── OUT3 ──── GND cpp

Physical Layout Recommendations

  • Keep SPI traces short (< 10cm recommended)
  • Use ground plane for noise reduction
  • Place decoupling capacitors (100nF ceramic + 10µF tantalum) close to VBAT and VIO pins
  • Route clock and data lines away from noise sources
  • Keep high-current traces (OUT0-5) away from sensitive signals
  • Use appropriate trace widths for high-current paths (1A = ~20 mils minimum)
  • Add flyback diodes for inductive loads (solenoids, valves)

Example Wiring Diagram

text TLE92466ED ┌─────────┐ 12V/24V ─────┤ VBAT │ 3.3V ─────┤ VIO │ GND ─────┤ GND │ SCK ─────┤ SCK │ MOSI ─────┤ SI │ MISO ─────┤ SO │ CS ─────┤ CSN │ └─────────┘ │ │ OUT0 ├───[Solenoid]─── VBAT │ │ OUT1 ├───[Valve]─── VBAT cpp

Protection Components

Flyback Diodes

For inductive loads (solenoids, valves), the TLE92466ED has internal protection, but external flyback diodes may be needed for very high inductance loads:

cpp VBAT ────[Flyback Diode]─── OUTx (cathode to VBAT) cpp

Current Limiting

The TLE92466ED has built-in overcurrent protection (OCP) and current regulation via ICC, but you may want to add external fuses for additional safety.

Next Steps

Navigation ⬅️ Quick Start | Next: Platform Integration ➡️ | Back to Index