Boardoza L9110S DC Motor Driver Breakout Board

The Boardoza L9110S Breakout Board is a dual-channel DC motor driver board built around the L9110S motor driver IC. It integrates a two-channel push-pull power amplifier in a compact breakout form, enabling bidirectional control of two DC motors through simple logic-level inputs.

The board supports TTL / CMOS compatible control signals and features low output saturation voltage along with integrated clamp diodes for inductive load protection. These characteristics make it suitable for low-voltage motor control in embedded systems, including robotics platforms, educational development boards, small automation projects, and basic stepper motor driving applications where direct GPIO-based motor control is required.

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Front Side	Back Side

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Key Features

• Dual-Channel DC Motor Driver: Allows independent forward and reverse control of two DC motors.
• Wide Operating Voltage Range: Supports motor supply voltages from 2.5 V to 12 V.
• High Current Capability: Delivers up to 750–800 mA continuous current per channel with peak currents up to 1.5 -2 A.
• TTL / CMOS Compatible Inputs: Can be directly interfaced with microcontrollers and CPUs without additional level shifting.
• Low Output Saturation Voltage: Improves efficiency and reduces power loss during motor operation.
• Built-in Protection Diodes: Integrated clamp diodes protect against reverse currents from inductive loads.
• Low Quiescent Current: Suitable for power-sensitive and battery-operated applications.

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Technical Specifications

Model: L9110S
Manufacturer: Boardoza
Manufacturer IC: Generic / Multiple vendors
Board Type: Dual Channel DC Motor Driver Breakout Board
Input Voltage Range: 2.5 V – 12 V
Output Current: 750–800 mA continuous per channel
Peak Current: Up to 1.5 A
Logic Level Compatibility: TTL / CMOS
Motor Channels: 2 (Independent control)
Supported Loads: DC motors, stepper motors, relays, inductive loads
Power Input Type: 2-pin 2.50 mm connector / 2.50 mm pin header
Control Interface: Direct GPIO control (A/B inputs per channel)
Operating Temperature: 0 °C to +80 °C
Board Dimensions: 20 mm × 40 mm

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Electrical Characteristics

Symbol	Parameter	Min	Typical	Max	Unit
VCC	Supply Voltage	2.5	6	12	V
Idd	Quiescent Current	—	0	2	µA
Iin	Operating Current	200	350	500	µA
IC	Continuous Current	750	800	850	mA
IMax	Peak Current	—	1500	2000	mA

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Logical Control Table – Channel 1 (M1)

M1_A	M1_B	A	B
H	L	H	L
L	H	L	H
L	L	L	L
H	H	L	L

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Logical Control Table – Channel 2 (M2)

M2_A	M2_B	A	B
H	L	H	L
L	H	L	H
L	L	L	L
H	H	L	L

Notes on Logic Levels

• H (High): Logic high level (TTL / CMOS compatible)
• L (Low): Logic low level
• Motor direction is determined by the relative logic state of A and B inputs.
• Applying the same logic level to both inputs results in braking behavior.

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Board Pinout

( J1 ) Control & Power Connector

Pin Number	Pin Name	Description
1	VCC	Motor voltage positive input
2	M2_B	Channel 2 control input B
3	M2_A	Channel 2 control input A
4	M1_B	Channel 1 control input B
5	M1_A	Channel 1 control input A
6	GND	Ground

( J4 ) Control & Power Connector (Parallel to J1)

Pin Number	Pin Name	Description
1	VCC	Motor voltage positive input
2	M2_B	Channel 2 control input B
3	M2_A	Channel 2 control input A
4	M1_B	Channel 1 control input B
5	M1_A	Channel 1 control input A
6	GND	Ground

( J2 ) Motor Output – Channel 1 (M1)

Pin Number	Pin Name	Description
1	B	Motor output B (Channel 1)
2	A	Motor output A (Channel 1)

( J3 ) Motor Output – Channel 2 (M2)

Pin Number	Pin Name	Description
1	B	Motor output B (Channel 2)
2	A	Motor output A (Channel 2)

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Board Dimensions

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Step Files

Boardoza L9110S.step

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Datasheet

L9110S Datasheet

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Version History

• v1.0 – Initial release

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Support

• For questions or technical support, please contact [email protected]

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License

This repository contains both hardware and software components:

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.

Software/Firmware

All software and firmware are licensed under BSD 3-Clause License.