HSD-4 Channel High Side Driver
Need to power multiple solenoids with high-speed switching but without the cost of multiple solid-state relays? The HSD-4 High Side Driver module is designed to control up to four medium-current 12V devices using solid-state switching, perfect for solenoids that require rapid operation.
Features:
- Four High-Side Drivers: Ideal for solenoids that need 12V power instead of ground
- Compatible with MS3Pro, MicroSquirt, or MegaSquirt: Ground-triggered outputs can easily connect to the HSD-4’s inputs
- Handles up to 8 amps per channel: Reliable performance for medium current solenoids
- Epoxy potted: Maximum vibration and water resistance, suitable for underhood use
Applications Include:
- Toyota A340/A341 transmissions
- Subaru W4A33 transaxles
- BMW Double VANOS variable valve timing solenoids
- Other solenoid setups needing rapid switching and 12V power
The HSD-4 module is perfect for situations where the solenoid ground is tied to the body, and only a single 12V wire powers the solenoid. Designed for fast, precise control in demanding environments.
Specifications:
- Operating Voltage: 12V DC
- Maximum Current: 8 Amps per channel
- Number of Channels: 4 High-Side Drivers
- Trigger Type: Ground-triggered
- Switching Frequency: Suitable for rapid switching solenoids
- Module Construction: Epoxy potted for durability and environmental resistance
Included in Box:
- HSD-4 High Side Driver Module
HSD-4 Wiring
| Function | Connects to HSD-4 wire | Wire Color |
| Input A | ECU or TCU | Yellow |
| Output A | Solenoid | White |
| Input B | ECU or TCU | Orange |
| Output B | Solenoid | Pink |
| Input C | ECU or TCU | Dark green |
| Output C | Solenoid | Light green |
| Input D | ECU or TCU | Blue |
| Output D | Solenoid | Purple |
| Power | Switched 12V | Red |
The red wires should all be grouped together and connected to a single fuse to 12V Switched Power. The fuse should be rated for the total current draw of all outputs being used, up to a maximum of 30 amps.
ECU Connections
The inputs need a ground signal to trigger their outputs. Here are what outputs you can use to trigger the HSD-4 high side driver with DIYAutoTune engine or transmission management.
MS3Pro: High current, PWM, injector, or tach outputs
MSPNP2 Gen 2: Output 1, output 2, boost, or tach outputs
MicroSquirt (transmission control): Shift solenoid, TCC, or EPC outputs
MicroSquirt (engine control): ALED, WLED, FIDLE, or tach outputs
MS3X: Mid current, tach, or injector outputs
MS1 or MS2: Relay control outputs or FIDLE (MS2 only)
GPIO Board: General purpose, PWM, or high current outputs