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Specifications
BHYS:
7mT
Operating Current:
13.5mA
Operation Points:
10mT
Release Points:
10mT
Operating Temperature:
-20℃~+85℃
Voltage - Supply:
3.5V~18V
Mfr. Part #:
AH477AZ4-BG1
Package:
SIP-4
Key Attributes
Model Number:
AH477AZ4-BG1
Product Description
Product Overview
The AH477A is a single-phase Hall effect latch with an integrated H-bridge output driver, designed for brushless DC motor applications. It features an on-chip Hall sensor, amplifier, comparator for noise rejection, and bi-directional drivers for high current loads. An internal bandgap regulator ensures temperature compensation and a wide operating voltage range. The device switches output states based on magnetic flux density thresholds, making it suitable for PWM power supply control speed applications in single-coil brushless DC motors and fans.
Product Attributes
- Brand: BCD Semiconductor Manufacturing Limited
- Package Type: TO-94 (SIP-4L)
- Certifications: RoHS compliant and green (designated with "G1" suffix)
Technical Specifications
| Parameter | Symbol | Value | Unit | Notes |
| Supply Voltage | VCC | 3.5 to 18 | V | Recommended Operating Conditions |
| Magnetic Flux Density (Operating Point) | BOP | 5 to 70 (Grade A) / 100 (Grade B) | Gauss | TA=25oC |
| Magnetic Flux Density (Releasing Point) | BRP | -70 to -5 (Grade A) / -100 (Grade B) | Gauss | TA=25oC |
| Hysteresis | BHYS | 70 | Gauss | TA=25oC |
| Output Saturation Voltage (Sink) | VSAT | 0.45 to 0.65 | V | VCC=14V, IO=200mA |
| Output Saturation Voltage (Drive) | VSAT | VCC- 1.3 to VCC- 1.0 | V | VCC=14V, IO=200mA |
| Supply Current | ICC | 13.5 to 16 | mA | VCC=20V, Output Open |
| Output Rise Time | tr | 0.5 to 1.0 | s | RL=820, CL=20pF |
| Output Fall Time | tf | 0.5 to 1.0 | s | RL=820, CL=20pF |
| Continuous Output Current | IO | 250 | mA | |
| Hold Output Current | IO | 300 | mA | |
| Peak Output Current (start up) | IO | 600 | mA | |
| Power Dissipation | PD | 550 | mW | |
| Operating Temperature | TA | -20 to 85 | oC | |
| Storage Temperature | TSTG | -50 to 150 | oC | |
| ESD Rating (Human Body Model) | 6000 | V | ||
| Frequency (PWM Power) | f | 0.1 to 25 | kHz |
2210281000_DIODES-AH477AZ4-BG1_C842030.pdf
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