Overview
The L9733CN, produced by STMicroelectronics, is a highly flexible monolithic, medium current, output driver. It incorporates 8 outputs that can be used as either internal low or high-side drives in any combination. This device is designed for automotive applications and is AEC-Q100 (Rev. F) qualified. The outputs are self-configuring, allowing users to connect high or low-side loads without additional inputs, and they provide proper fault mode operation. The L9733CN can switch variable load currents over a wide ambient temperature range of -40 °C to +125 °C, making it suitable for various automotive systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage (Vdd) | 4.5 to 5.5 | V |
| Battery Supply Voltage (Vbat) | 4.5 to 18 | V |
| Thermal Junction Temperature Range (Tj) | -40 to 150 | °C |
| Maximum Output Current (IOx) | 800 | mA |
| On-Resistance (RON) | 0.7 Ω @ Tj = 25 °C, 1.2 Ω @ Tj = 125 °C | Ω |
| Output Voltage Clamping (Low-Side) | min. 40 V | V |
| Output Voltage Clamping (High-Side) | max. -14 V | V |
| Package | PowerSSO-28 (Exposed pad) |
Key Features
- AEC-Q100 (Rev. F) qualified for automotive use.
- Eight independently self-configuring low/high drivers.
- SPI interface for output control and diagnosis data communication.
- Additional PWM inputs for outputs 6, 7, and 8.
- Independent thermal shutdown for all outputs with open load, short to GND, short to Vb, and overcurrent diagnostics in latched or unlatched mode.
- Internal charge pump without the need for an external capacitor.
- Controlled SR for reduced EMC.
Applications
The L9733CN is designed for various automotive applications, including but not limited to:
- Body control modules.
- Power door and window control.
- Wiper and washer control.
- Headlight and taillight control.
- Other automotive systems requiring flexible and reliable output drivers.
Q & A
- What is the operating temperature range of the L9733CN?
The L9733CN operates over a temperature range of -40 °C to +125 °C. - How many outputs does the L9733CN have, and what are their configurations?
The L9733CN has 8 outputs that can be self-configured as either low or high-side drivers. - What is the supply voltage range for the L9733CN?
The supply voltage range is from 4.5 V to 5.5 V. - Does the L9733CN support PWM control?
Yes, outputs 6, 7, and 8 can be PWM controlled via external pins (IN6-8). - What is the maximum output current per channel?
The maximum output current per channel is 800 mA. - Is the L9733CN AEC-Q100 qualified?
Yes, the L9733CN is AEC-Q100 (Rev. F) qualified. - How does the L9733CN handle fault conditions?
The L9733CN has independent thermal shutdown and diagnostics for open load, short to GND, short to Vb, and overcurrent in latched or unlatched mode for each channel. - Can multiple L9733CN devices be daisy-chained?
Yes, multiple L9733CN devices can be daisy-chained. - What is the purpose of the internal charge pump in the L9733CN?
The internal charge pump eliminates the need for an external capacitor. - How does the L9733CN reduce electromagnetic compatibility (EMC) issues?
The L9733CN features controlled SR (switching rate) to reduce EMC.
