Key facts
- Brand
- Allegro
- Model
- A3935
- Documents
- 2
- Languages
- EN
- Last added
- 2012-08-03
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Allegro A3935 Three-Phase Power MOSFET Controller Datasheet
The A3935 is a three-phase power MOSFET controller designed specifically for automotive applications requiring high-power motors. It integrates a pulse-frequency modulated (PEM) boost converter to create a constant supply voltage for driving external n-channel power MOSFETs from low-voltage battery supplies.
The device provides six high-current gate drive outputs and includes diagnostic features such as current monitor output, adjustable battery overvoltage detection, and protection against short-to-battery, short-to-supply, bridge-open, and thermal shutdown conditions.
Allegro A3935 specifications
| Operating Temperature Range (Tj) | -40°C to +150°C |
|---|---|
| Junction Temperature (Tj) | +150°C |
| Load Supply Voltages Range | -0.6 V to 40 V |
| Output Voltage Ranges (GHA/GHB/GHC) | -4V to 55 V |
| Logic Supply Voltage (VDD) Range | -0.3 V to +6.5 V |
| VBAT Operating Range | 7.0 V to 40 V |
| VREG Output Voltage | 12.7 V to 14 V |
| Boost Output Voltage Limit (Max) | 163 V |
Source: Allegro A3935 Three-Phase Power MOSFET Controller Datasheet
All Allegro A3935 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
Questions answered in these manuals
Does the A3935 include protection for short-to-battery?
Yes, it includes diagnostic outputs to protect against short-to-battery conditions.
From: Allegro A3935 Three-Phase Power MOSFET Controller Datasheet
What is the thermal shutdown temperature threshold?
The thermal shutdown activates at a junction temperature between 160°C and 180°C.
From: Allegro A3935 Three-Phase Power MOSFET Controller Datasheet
Does the A3935 include a boost converter?
Yes, it integrates a pulse-frequency modulated boost converter for use with low-voltage battery supplies.
From: Allegro MicroSystems A3935 Three-Phase Power MOSFET Controller Datasheet
What protection features are included?
The device includes protection for short-to-battery, short-to-supply, bridge-open, and battery under/overvoltage conditions.
From: Allegro MicroSystems A3935 Three-Phase Power MOSFET Controller Datasheet