SGM42630
Dual H-bridge motor driver with 2.5A peak current per channel, voltage range of 2.5V to 12V, and integrated protection.
Product Overview
Description
The SGM42630 is a dual H-bridge motor driver capable of driving two DC motors or one stepper motor.
Each H-bridge can deliver up to 2.5A peak current with integrated current regulation and protection.
The wide supply voltage range supports battery-operated and industrial applications.
Product Series
SGM
Primary Application
Toys and robotics
Key Features
- Dual H-bridge configuration
- 2.5A peak current per channel
- Low RDS(on) for high efficiency
- Current regulation and limiting
- Low-power sleep mode
Specifications
| Supply Voltage | 2.5V - 12V |
|---|---|
| Output Current | 2.5A peak per channel |
| Control Interface | PWM and direction pins |
| Protection Features | OCP, thermal, UVLO |
| Package | TSSOP-16, QFN-4x4-24 |
Applications
Toys and robotics
Electronic system design
Printer mechanisms
Electronic system design
CCTV camera movement
Electronic system design
Industrial valves
Industrial automation and control
Battery-powered equipment
Battery and charging management
FAE Expert Insights
"The SGM42630 is a versatile motor driver that I frequently recommend for small to medium DC motor applications. The dual H-bridge configuration provides flexibility - you can drive two independent DC motors or combine both bridges for a single higher-current motor. The integrated current regulation is particularly useful for limiting stall current and protecting both the motor and driver. I've successfully used this driver in robotics projects and camera gimbal applications. The low RDS(on) keeps thermal dissipation manageable even at higher currents. For battery applications, the sleep mode feature helps extend battery life when motors are idle."
Flexible dual H-bridge solution for DC and stepper motor applications
— Alex Zhao, BeiLuo
Frequently Asked Questions
Can the SGM42630 drive a stepper motor?
Yes, the SGM42630 can drive a bipolar stepper motor by combining both H-bridges. Connect one winding to the first H-bridge (OUT1/OUT2) and the second winding to the second H-bridge (OUT3/OUT4). Control the phase sequence through the input pins to achieve stepping. The driver supports full-step and half-step modes. For microstepping, external current control through PWM is required. The 2.5A peak current capability supports most small to medium stepper motors used in printers, scanners, and automation equipment.
Use both H-bridges together for stepper motor control. Follow phase sequencing tables for proper rotation.
What is the current regulation feature of the SGM42630?
The SGM42630 includes current regulation that limits motor current to a programmed level. This is achieved through PWM chopping of the output when current exceeds the set threshold. Benefits include: 1) Protection against overcurrent conditions; 2) Torque limiting for safety; 3) Reduced power dissipation during stall; 4) Consistent torque across supply voltage variations. The current limit is set using an external sense resistor and reference voltage. This feature is particularly valuable for protecting gearboxes and mechanisms from excessive torque.
Configure current limit based on motor specifications and application requirements. Protects motor and mechanism from overload.
How do I implement PWM speed control with the SGM42630?
PWM speed control is implemented by applying a PWM signal to the enable pins (AIN1/AIN2 or BIN1/BIN2) while holding the direction pins at appropriate logic levels. The PWM duty cycle controls the average voltage applied to the motor, thereby controlling speed. Recommended PWM frequency is 20-50kHz to avoid audible noise. Higher frequencies reduce current ripple but increase switching losses. The SGM42630 supports PWM frequencies up to 100kHz. For bidirectional control, use one pin for PWM and the other for direction, or use complementary PWM on both pins.
Apply 20-50kHz PWM to enable pins for speed control. Use higher frequencies for quieter operation, lower frequencies for better efficiency.
What thermal management is required for the SGM42630?
Thermal management depends on operating current and duty cycle: 1) At currents below 1A per channel, minimal heatsinking is required - the TSSOP package can dissipate heat through PCB copper; 2) At 1-2A, add copper pours on PCB connected to the exposed pad; 3) At maximum current (2.5A), consider thermal vias and larger copper area; 4) Calculate power dissipation: P = I^2 x RDS(on) x 2 (for both high and low side); 5) Ensure junction temperature stays below 150C. The thermal shutdown feature protects the device but should not be relied upon for normal operation.
Design adequate PCB copper area for heat dissipation based on your current requirements. Use thermal vias for high-current applications.
Can the SGM42630 operate from a single Li-ion battery?
Yes, the SGM42630 operates from 2.5V to 12V, making it compatible with single-cell Li-ion batteries (3.0V - 4.2V). At typical Li-ion voltage (3.7V nominal), the driver can deliver good torque for small DC motors. Consider that motor speed is proportional to voltage - at 3.7V, a 6V-rated motor will run at approximately 60% of rated speed. The low RDS(on) at low voltages helps maintain efficiency. For applications requiring higher speed or torque, consider boosting the battery voltage or using a lower-voltage rated motor.
SGM42630 works well with single Li-ion cells. Select motors rated for 3-5V for best performance with Li-ion batteries.