Product Overview
The AH3774 is a high-voltage, high-sensitivity Hall-effect latch IC designed for applications such as brushless DC motor commutation, flow meters, linear encoders, and position sensors in industrial and consumer home appliances. It operates over a wide supply range of 3.0V to 28V and features a chopper-stabilized architecture for temperature compensation and reliability. The device includes protection mechanisms like a reverse blocking diode and Zener clamp on the supply, as well as an overcurrent limit and Zener clamp on the output. The single open-drain output switches on with a South Pole of sufficient strength and switches off with a North Pole of sufficient strength.
Product Attributes
- Brand: Diodes Incorporated
- Certifications: Totally Lead-Free & Fully RoHS Compliant, Halogen and Antimony Free (Green Device)
- Note: The AH3774 is not recommended for new designs. Please use the AH3724.
Technical Specifications
| Parameter | Conditions | Min | Typ | Max | Unit |
| Supply Voltage (VDD) | Operating | 3.0 | - | 28 | V |
| Operating Temperature Range | - | -40 | - | +125 | C |
| Output On Voltage (VOUT_ON) | IOUT = 20mA, B > Bop | - | 0.2 | 0.4 | V |
| Output Leakage Current (IOUT_OFF) | VOUT = 28V, B < Brp, Output Off | - | < 0.1 | 10 | A |
| Supply Current (IDD) | Output Open, TA = +25C | - | 3 | - | mA |
| Supply Current (IDD) | Output Open, TA = -40C to +125C | - | - | 4 | mA |
| Chopping Frequency (fC) | VDD 3V | - | 800 | - | kHz |
| Output Current Limit (IOCL) | B > Bop | 30 | - | 55 | mA |
| Operation Point (Bop) | VDD = 12V, TA = +25C | - | 40 | - | Gauss |
| Operation Point (Bop) | TA = -40C to +125C | 20 | 40 | 60 | Gauss |
| Release Point (Brp) | VDD = 12V, TA = +25C | - | -40 | - | Gauss |
| Release Point (Brp) | TA = -40C to +125C | -60 | -40 | -20 | Gauss |
| Hysteresis (Bhy) | VDD = 12V, TA = +25C | - | 80 | - | Gauss |
| Hysteresis (Bhy) | TA = -40C to +125C | 40 | 80 | 120 | Gauss |
2412251007_DIODES-AH3774-P-B_C155332.pdf
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