Overview
The PM8851D device, produced by STMicroelectronics, is a high-frequency single-channel low-side MOSFET driver. It is specifically designed to work with digital power conversion microcontrollers, such as the STMicroelectronics STLUX™ family of products. This driver is optimized for high-speed operation and is suitable for various power conversion topologies.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 10 V to 18 V | V |
| Sink Current Capability | 1 A | A |
| Source Current Capability | 0.8 A | A |
| Input Threshold Voltage Range | 2 V to 5.5 V | V |
| Operating Temperature Range | -40 °C to 125 °C | °C |
| Propagation Delays (IN to GD) | 30 ns (typ.) | ns |
| Rise and Fall Times (COUT = 470 pF) | 20 ns (typ.) | ns |
| Package Type | SOT23-6L | - |
| UVLO (Under Voltage Lock Out) | Present for input and output stages | - |
Key Features
- Low-side MOSFET driver with 1 A sink and 0.8 A source capability
- Complementary outputs for source and sink driving
- External reference for input threshold
- Wide supply voltage range (10 V to 18 V)
- Input and output pull-down resistors
- Short propagation delays
- UVLO circuitry for input and output stages
- Wide operating temperature range: -40 °C to 125 °C
Applications
- Switch-Mode Power Supplies (SMPS)
- Digital lighting
- Wireless battery chargers
- Digitally controlled MOSFETs
- Digitally controlled PFC boost converters, flyback converters, and inverse buck converters
Q & A
- What is the PM8851D device used for?
The PM8851D is a high-frequency single-channel low-side MOSFET driver designed to work with digital power conversion microcontrollers.
- What is the supply voltage range for the PM8851D?
The supply voltage range is 10 V to 18 V.
- What are the sink and source current capabilities of the PM8851D?
The sink current capability is 1 A, and the source current capability is 0.8 A.
- What is the operating temperature range of the PM8851D?
The operating temperature range is -40 °C to 125 °C.
- Does the PM8851D have UVLO circuitry?
- What package type is the PM8851D available in?
The PM8851D is available in the SOT23-6L package.
- What are some typical applications of the PM8851D?
Typical applications include SMPS, digital lighting, wireless battery chargers, and digitally controlled MOSFETs.
- How do I configure the input threshold voltage for the PM8851D?
The input threshold voltage can be configured using the IN_TH pin, which can be connected to the same voltage as the microcontroller supply voltage or derived from the VCC pin using a voltage divider.
- What are the propagation delays for the PM8851D?
The propagation delays from IN to GD are typically 30 ns for both rising and falling edges.
- How should I layout the PM8851D to minimize noise?
The PM8851D should be placed close to the gate of the driven MOSFET to reduce the risk of injecting high-frequency noise.
