Overview
The L9856-LF, manufactured by STMicroelectronics, is a high-voltage high-side driver IC designed to drive N-Channel Power MOS transistors. This device is fabricated using BCD 'OFF-LINE' technology, enabling it to operate with a high voltage rail up to 160 V. The L9856-LF features CMOS/TTL compatible inputs with hysteresis, making it easy to interface with controlling devices. It is packaged in an SO-8 package and is available in both tube and tape-and-reel packaging options.
Key Specifications
| Parameter | Value | Units | Min. | Max. |
|---|---|---|---|---|
| Operating Temperature Range | -40 to +125 | °C | -40 | +125 |
| Supply Voltage (VCC) | 4.4 to 6.5 | V | 4.4 | 6.5 |
| High Side Floating Supply Voltage (VBS) | -0.3 to 20 | V | -0.3 | 20 |
| High Side Driver Output Stage Voltage (VB) | -5 to 166 | V | -5 | 166 |
| Peak Output Current (Source, Sink) | 500 mA | mA | 500 | 500 |
| Rise/Fall Time | 100 ns | ns | 100 | 100 |
| Thermal Resistance Junction to Ambient | 150 | °C/W | 150 | 150 |
| Package | SO-8 |
Key Features
- High voltage rail up to 160 V
- dV/dt immunity ±50 V/nsec in full temperature range
- Driver current capability: 500 mA source, 500 mA sink
- Switching times: 100 ns rise/fall with 2.5 nF load
- CMOS/TTL Schmitt trigger inputs with hysteresis
- Under voltage lock out (UVLO)
- Clamping on VCC
- Loading circuit for external Bootstrap capacitor
- Inverting input
- Reset circuitry
Applications
The L9856-LF is suitable for various high-voltage applications, including but not limited to:
- Power supplies and DC-DC converters
- Motor control and drive systems
- Industrial automation and control systems
- Aerospace and automotive systems requiring high reliability and high voltage handling
- Other applications where high-side MOSFET driving is necessary
Q & A
- What is the maximum high-side floating supply voltage for the L9856-LF?
The maximum high-side floating supply voltage (VBS) is 20 V, though it can handle transient voltages up to 166 V for the driver output stage.
- What is the operating temperature range of the L9856-LF?
The operating temperature range is from -40°C to +125°C.
- What is the peak output current capability of the L9856-LF?
The L9856-LF can source and sink up to 500 mA of current.
- What type of inputs does the L9856-LF have?
The L9856-LF has CMOS/TTL compatible inputs with hysteresis.
- Does the L9856-LF have under voltage lockout (UVLO) protection?
- What is the typical rise and fall time of the L9856-LF?
- What package types are available for the L9856-LF?
- Is the L9856-LF RoHS compliant?
- What is the thermal resistance junction to ambient for the L9856-LF?
- Does the L9856-LF have reset circuitry?
