L9952-TR - SPI Controlled 8-Channel Low-Side Driver | STMicroelectronics
Артикул: L9952-TR ✓ Активен| Кол-во | Цена за ед. | Итого |
|---|---|---|
| 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 |
L9952-TR Обзор
A low-side driver is a type of power switch that connects the load to ground when activated, commonly used to control relays, solenoids, LEDs, and other inductive or resistive loads in automotive body electronics. In the system hierarchy, the L9952-TR functions as a power management IC, specifically a smart power switch, integrating logic, protection, and diagnostic features into a single package. This integration reduces external component count and enhances system reliability compared to discrete MOSFET solutions.
Key features of the L9952-TR include SPI-controlled outputs with daisy-chain capability, 16-bit data word for command and diagnosis, and built-in protection against overcurrent, overtemperature, and short-circuit conditions. Each output has a low-side driver with a typical on-resistance of 1.5 Ω, ensuring efficient power delivery. The device also features a 10-bit ADC for analog feedback of output currents, enabling precise load monitoring and fault detection.
From a technical perspective, the L9952-TR utilizes a smart power technology that combines CMOS logic with vertical power MOSFETs, allowing for high integration and robust performance. The SPI interface operates at clock frequencies up to 5 MHz, enabling fast communication with microcontrollers. The device includes a fail-safe mode that turns off all outputs in case of a watchdog timeout or overtemperature event, enhancing system safety.
Typical applications include automotive body control modules, relay drivers, LED lighting control, and industrial PLC output stages. The L9952-TR is particularly suited for driving inductive loads such as relays and solenoids, where its integrated freewheeling diodes and protection features simplify design. In automotive environments, the wide supply range and AEC-Q100 qualification ensure reliable operation under harsh conditions.
When designing with the L9952-TR, it is essential to provide adequate decoupling on the supply pins and to ensure proper thermal management, as the PowerSO-36 package can dissipate significant power when driving multiple channels at high current. The SPI interface should be carefully configured to avoid bus contention, and the watchdog timer must be serviced regularly to prevent unintended shutdown.
Аналоги без доработки для L9952-TR — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
Инструмент быстрого сравнения — выберите альтернативные компоненты для сравнения бок о бок:
L9952-TR
✅ Прямая замена✓ В наличии
$2.88 / шт.
Открыть даташит →L9952-TR
✅ Прямая замена✓ В наличии
$2.88 / шт.
Открыть даташит →L9952-TR
✅ Прямая замена✓ В наличии
$2.88 / шт.
Открыть даташит →TLE6228GP
⚡ Тот же корпус ⚠️ Характеристики не проверены📋 Справочный аналог (нет в каталоге)
L9952-TR Максимальные параметры и электрические характеристики
| Количество выходов | 8 |
| Тип выхода | 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 Ω |
| SPI Clock Frequency | 5 MHz (max) |
| ADC Resolution | 10-bit |
| Диапазон рабочих температур | -40°C to +150°C |
| Корпус | PowerSO-36 |
| Тип монтажа | Surface Mount |
| Qualification | AEC-Q100 |
| Статус RoHS | Compliant |
| Protection Features | Overcurrent, Overtemperature, Short-Circuit |
| Интерфейс | SPI |
Конфигурация выводов L9952-TR
| Контакт 1 | OUT1 — Low-side output 1 |
| Контакт 2 | OUT2 — Low-side output 2 |
| Контакт 3 | OUT3 — Low-side output 3 |
| Контакт 4 | OUT4 — Low-side output 4 |
| Контакт 5 | OUT5 — Low-side output 5 |
| Контакт 6 | OUT6 — Low-side output 6 |
| Контакт 7 | OUT7 — Low-side output 7 |
| Контакт 8 | OUT8 — Low-side output 8 |
| Контакт 9 | GND — Ground |
| Контакт 10 | VCC — Logic supply voltage |
| Контакт 11 | VS — Power supply voltage |
| Контакт 12 | SCK — SPI clock |
| Контакт 13 | SI — SPI data input |
| Контакт 14 | SO — SPI data output |
| Контакт 15 | CSN — SPI chip select (active low) |
| Контакт 16 | RSTN — Reset (active low) |
Типичное применение
L9952-TR подходит для 6 применениеs: 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.
Рекомендуется
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 (1.5Ω) 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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
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.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для L9952-TR — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | 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 |
Ключевые отличия
- Higher output current per channel (против TLE6228GP)
- Integrated 10-bit ADC for current sensing (против TLE6228GP)
- Wider supply voltage range (против TLE6228GP)
Заметки по проектированию
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.
Информация о соответствии
RoHS compliant and AEC-Q100 qualified per STMicroelectronics product page. Halogen-free status not explicitly stated.