Key Specs
| Spec | Value | Condition | Source |
|---|---|---|---|
| Applications | DC Motors, General Purpose | Digi-Key | |
| Current Output Channel | 1.3A | Digi-Key | |
| Current Peak Output | - | Digi-Key | |
| Fault Protection | Current Limiting, Over Temperature, Short Circuit | Digi-Key | |
| Features | - | Digi-Key | |
| Interface | PWM | Digi-Key | |
| Load Type | Inductive | Digi-Key | |
| Mounting Type | Surface Mount | Digi-Key | |
| Operating Temperature Range | -40°C ~ 150°C (TJ) | Digi-Key | |
| Output Configuration | Half Bridge (4) | Digi-Key | |
| Package Case | 16-VFQFN Exposed Pad | Digi-Key | |
| RDS On (Typ) | 400mOhm LS + HS | Digi-Key | |
| Supplier Device Package | 16-VFQFPN (3x3) | Digi-Key | |
| Technology | Power MOSFET | Digi-Key | |
| Voltage Load | 1.8V ~ 10V | Digi-Key | |
| Voltage Supply | 0V ~ 5V | Digi-Key |
When To Use
Use the STSPIN240 for driving DC motors in applications requiring a single output channel with a continuous current up to 1.3A. It is well suited for general-purpose inductive loads operating within a supply voltage range of 0V to 5V and load voltage from 1.8V to 10V. Its half-bridge output configuration and integrated power MOSFET technology make it ideal for compact surface-mount designs where space is limited and efficient PWM control is needed.
When Not To Use
Do not use the STSPIN240 in applications requiring peak output currents above 1.3A or where multi-channel outputs are necessary, such as multi-phase motor drives. For applications demanding higher current or multiple outputs, consider devices specifically designed for higher current ratings or multi-channel operation. Additionally, avoid using this device in non-inductive or purely resistive load applications where a different driver topology may be more efficient.
Application Notes
The half-bridge output node switches rapidly and must have the smallest possible loop area to reduce switching noise and voltage spikes. The exposed pad on the 16-VFQFN package should be soldered directly to a thermal pad on the PCB to enhance heat dissipation, especially when operating near the maximum continuous current of 1.3A. The PWM input pin is noise-sensitive; proper filtering and routing away from noisy signals are recommended. A heatsink is generally not required if the PCB layout provides adequate thermal management at typical operating points within the -40°C to 150°C junction temperature range.
Gotchas
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Incorrect PCB layout causing excessive switching loop area: If the switching node loop area is large, it can induce voltage spikes and electromagnetic interference, potentially damaging the MOSFETs or causing erratic operation. To avoid this, minimize the PCB trace length between the half-bridge output and the load, and keep the high-current loop area as small as possible.
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Ignoring thermal management at high ambient temperatures: Operating near the upper junction temperature limit of 150°C without adequate thermal dissipation can cause thermal shutdown or device failure. Use proper PCB thermal design techniques, including copper pours and exposed pad soldering, to ensure effective heat dissipation and maintain junction temperature within safe limits.