Overview
The L99MD01XP, produced by STMicroelectronics, is an octal half-bridge driver designed specifically for automotive applications. This device is intended to drive DC and/or stepper motors, making it versatile for various motor control needs in the automotive sector.
It features an integrated 24-bit standard Serial Peripheral Interface (SPI) that controls all outputs and provides diagnostic information, including normal operation, open-load in on-state, overcurrent, temperature warning, and overtemperature protection.
The device can drive 4 stepper motors simultaneously using the boost converter, or 3 stepper motors in sequential mode or 2 stepper motors simultaneously without the boost converter. It can also drive 4 DC motors simultaneously and 7 DC motors sequentially.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Number of Half Bridges | 8 | |
| RON (Typical) | 0.9 Ω (HS), 0.64 Ω (LS) @ Tj = 25 °C | |
| Current Limit per Output | Minimum 0.8 A | |
| DC/DC Step Up Converter | Intrinsic, driving an external MOSFET | |
| PWM Mode | Option for all half bridges for hold current | |
| Internal PWM Generation | Available | |
| Current Monitor Outputs | Two | |
| SPI Interface | 24-bit standard SPI for data communication | |
| Temperature Warning | Available | |
| Overtemperature Protection | All outputs protected | |
| Short Circuit Protection | All outputs protected | |
| VCC Supply Voltage | 3.0 to 5.3 V | |
| Standby Mode Current Consumption | Typical 5 μA | |
| VS Operating Range | 6 V – 18 V | |
| Package | PowerSSO 36 | |
| Grade | Automotive | |
| RoHS Compliance Grade | Ecopack2 |
Key Features
- 8 half bridges for driving DC and/or stepper motors
- Low RON (typ. 0.9 Ω for HS, 0.64 Ω for LS at Tj = 25 °C)
- Current limit of each output at minimum 0.8 A
- Intrinsic DC/DC step up converter driving an external MOSFET
- PWM mode option for all half bridges for hold current
- Internal PWM generation
- Two current monitor outputs
- 24-bit standard SPI interface for data communication
- Temperature warning and overtemperature protection for all outputs
- Short circuit protection for all outputs
- Very low current consumption in standby mode (typ. 5 μA)
- VS operating range compliant: 6 V – 18 V
Applications
The L99MD01XP is primarily intended for automotive applications, including:
- Stepper motor drivers
- DC motor drivers
- Driving HVAC flaps and other automotive motor control systems
Q & A
- What is the primary function of the L99MD01XP?
The L99MD01XP is an octal half-bridge driver designed to drive DC and/or stepper motors in automotive applications.
- How many half bridges does the L99MD01XP have?
The device has 8 half bridges.
- What is the typical RON value for the L99MD01XP?
The typical RON value is 0.9 Ω for HS and 0.64 Ω for LS at Tj = 25 °C.
- What is the minimum current limit per output?
The minimum current limit per output is 0.8 A.
- Does the L99MD01XP have an integrated DC/DC step up converter?
Yes, it has an intrinsic DC/DC step up converter that drives an external MOSFET.
- What communication interface does the L99MD01XP use?
The device uses a 24-bit standard Serial Peripheral Interface (SPI) for data communication.
- What kind of protection does the L99MD01XP offer?
The device offers temperature warning, overtemperature protection, and short circuit protection for all outputs.
- What is the operating voltage range for the VS supply?
The VS operating range is compliant from 6 V to 18 V.
- What is the typical current consumption in standby mode?
The typical current consumption in standby mode is 5 μA.
- In what package is the L99MD01XP available?
The device is available in the PowerSSO 36 package.
