L9952-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
MPN: L9952-TR β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.24 | $1,620.00 |
| 1,000 | $2.88 | $2,880.00 |
Drop-in alternatives for L9952-TR β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
L9952-TR
β Drop-Inβ 99,999 In Stock
$2.88 / Unit
View Datasheet βL9952-TR
β Drop-Inβ 99,999 In Stock
$2.88 / Unit
View Datasheet βL9952-TR
β Drop-Inβ 99,999 In Stock
$2.88 / Unit
View Datasheet βTLE6228GP
β‘ Same Packageπ Reference alternative (not in catalog)
L9952-TR Maximum Ratings & Electrical Characteristics
| Number of Outputs | 8 |
| Output Type | Low-Side |
| Continuous Output Current per Channel | 1.2 A |
| Supply Voltage (Logic) | 4.5 V to 5.5 V |
| Supply Voltage (Power Stage) | 4.5 V to 28 V |
| On-Resistance (Typical) | 1.5 Ξ© |
| SPI Clock Frequency | 5 MHz (max) |
| ADC Resolution | 10-bit |
| Operating Temperature Range | -40Β°C to +150Β°C |
| Package | PowerSO-36 |
| Mounting Type | Surface Mount |
| Qualification | AEC-Q100 |
| RoHS Status | Compliant |
| Protection Features | Overcurrent, Overtemperature, Short-Circuit |
| Interface | SPI |
L9952-TR Pin Configuration
| Pin 1 | OUT1 β Low-side output 1 |
| Pin 2 | OUT2 β Low-side output 2 |
| Pin 3 | OUT3 β Low-side output 3 |
| Pin 4 | OUT4 β Low-side output 4 |
| Pin 5 | OUT5 β Low-side output 5 |
| Pin 6 | OUT6 β Low-side output 6 |
| Pin 7 | OUT7 β Low-side output 7 |
| Pin 8 | OUT8 β Low-side output 8 |
| Pin 9 | GND β Ground |
| Pin 10 | VCC β Logic supply voltage |
| Pin 11 | VS β Power supply voltage |
| Pin 12 | SCK β SPI clock |
| Pin 13 | SI β SPI data input |
| Pin 14 | SO β SPI data output |
| Pin 15 | CSN β SPI chip select (active low) |
| Pin 16 | RSTN β Reset (active low) |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
L9952-TR is suitable for 6 applications: Automotive Body Control Module, Relay Driver, LED Lighting Control, Industrial PLC Output Stage, Solenoid Driver, Test and Measurement Equipment.
Automotive Body Control Module
The L9952-TR is ideal for automotive body control modules (BCMs) where multiple loads such as relays, solenoids, and LEDs need to be controlled. Its 8 low-side channels can drive up to 1.2A each, and the SPI interface allows a microcontroller to manage all outputs with minimal I/O pins. The wide supply range (4.5V to 28V) ensures compatibility with automotive battery voltages, and the AEC-Q100 qualification guarantees reliability in harsh environments. The integrated protection features (overcurrent, overtemperature, short-circuit) protect the module and the loads, reducing the need for external protection components. The 10-bit ADC enables current monitoring for diagnostic purposes, which is essential for detecting faulty loads or wiring.
Recommended
Relay Driver
The L9952-TR is well-suited for driving relays in industrial and automotive applications. Each output can sink 1.2A, which is sufficient for most automotive relays. The integrated freewheeling diodes protect the device from inductive kickback, eliminating the need for external clamping diodes. The SPI interface allows precise control of relay switching sequences, and the diagnostic features can detect relay coil failures. The low on-resistance (1.5Ξ©) minimizes power dissipation, and the PowerSO-36 package provides good thermal performance. In a typical relay driver circuit, the L9952-TR is placed between the microcontroller and the relay coils, with each output connected to one coil. The 10-bit ADC can be used to measure the coil current, enabling detection of stuck or open relays.
Recommended
LED Lighting Control
The L9952-TR can be used for LED lighting control in automotive and industrial applications. Each channel can drive up to 1.2A, which is suitable for high-power LEDs. The SPI interface enables PWM dimming by rapidly switching the outputs, and the 10-bit ADC can be used for current monitoring to ensure consistent brightness. The wide supply voltage range allows direct connection to automotive battery rails, and the protection features prevent damage from overcurrent or short circuits. In a typical LED lighting application, the L9952-TR is used to control multiple LED strings, with each output connected to the cathode of an LED string. The low-side configuration is ideal for common-anode LED configurations. The device's thermal performance is adequate for moderate power dissipation, but for high-current applications, proper PCB layout and thermal management are essential.
Recommended
Industrial PLC Output Stage
The L9952-TR is suitable for industrial PLC output stages where multiple low-side switches are needed to control actuators, valves, and indicators. Its SPI interface allows a PLC CPU to control up to 8 outputs with a single serial link, reducing wiring complexity. The wide supply range (4.5V to 28V) accommodates various industrial power rails, and the protection features ensure robust operation in industrial environments. The 10-bit ADC provides current feedback, which can be used for load diagnostics and predictive maintenance. In a typical PLC output stage, the L9952-TR is used to drive relays or solid-state switches that control higher-power loads. The PowerSO-36 package is suitable for DIN-rail mounted modules, and the AEC-Q100 qualification, while automotive-focused, also indicates high reliability for industrial use.
Recommended
Solenoid Driver
The L9952-TR is ideal for driving solenoids in automotive and industrial applications, such as fuel injectors, transmission solenoids, and pneumatic valves. Each output can handle the inductive load with integrated freewheeling diodes, and the SPI interface allows precise timing control. The 10-bit ADC can monitor the solenoid current to detect faults like open or shorted coils. The wide supply range and protection features make it suitable for harsh environments. In a typical solenoid driver circuit, the L9952-TR is used to switch the ground side of the solenoid, with the supply voltage connected to the solenoid's other terminal. The device's low on-resistance minimizes power loss, and the thermal performance of the PowerSO-36 package is adequate for moderate duty cycles.
Recommended
Test and Measurement Equipment
The L9952-TR can be used in test and measurement equipment for switching various loads in automated test setups. Its SPI interface allows easy integration with microcontrollers or FPGAs, and the 8 channels provide flexibility for controlling multiple loads. The 10-bit ADC enables precise current measurement, which is useful for characterizing devices under test. The wide supply range and protection features ensure safe operation in laboratory environments. In a typical test system, the L9952-TR is used to switch power to different test points, with the SPI interface controlled by a host computer. The device's small footprint and surface-mount package make it suitable for compact test fixtures.
Recommended
Recommended Products Summary
Engineering reference data for L9952-TR β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | L9952-TR | TLE6228GP |
|---|---|---|---|
| Package | PowerSO-36 | PowerSO-36 | PG-DSO-36 |
| Brand | STMicroelectronics | STMicroelectronics | Infineon |
| Number of Outputs | 8 | 8 | 8 |
| Output Current per Channel | 1.2 A | 1.2 A | 0.5 A |
| Supply Voltage Range | 4.5 V to 28 V | 4.5 V to 28 V | 4.5 V to 5.5 V |
| SPI Clock Frequency | 5 MHz | 5 MHz | 1 MHz |
| ADC Resolution | 10-bit | 10-bit | None |
| Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 |
Key Differentiators
- Higher output current per channel (vs TLE6228GP)
- Integrated 10-bit ADC for current sensing (vs TLE6228GP)
- Wider supply voltage range (vs TLE6228GP)
Design Notes
Ensure adequate decoupling on the VCC and VS pins. Place a 100nF ceramic capacitor close to each supply pin and a 10uF electrolytic capacitor on the VS pin to handle transient currents. The logic supply (VCC) should be clean and stable, as noise on VCC can affect SPI communication and internal logic.
The PowerSO-36 package has an exposed pad that must be soldered to a copper area on the PCB for heat dissipation. When driving all 8 channels at 1.2A, the total power dissipation can be significant (P = I^2 * R_on * 8 = 1.2^2 * 1.5 * 8 = 17.28W). Ensure the PCB has adequate copper area and thermal vias to keep the junction temperature below the maximum rating. Consider using a heatsink or forced air cooling for high-duty-cycle applications.
For high-current outputs, use wide traces (at least 2mm per amp) to minimize voltage drop and heat generation. Keep the SPI lines short and shielded to avoid noise coupling. Place the L9952-TR close to the loads to reduce parasitic inductance. Also, ensure that the ground plane is solid and connected to the exposed pad for optimal thermal and electrical performance.
Compliance Information
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not explicitly stated.
