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AH276

Features: On-chip Hall sensor with two different sensitivity and hysteresis settings for AH276 400mA (avg) output sink current Built-in protecting diode only for chip reverse power connecting -20°C to 85°C operating temperature Low profile 4 pin SIP packageApplication Dual-coil Brush-less DC Mot...

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SeekIC No. : 004278799 Detail

AH276: Features: On-chip Hall sensor with two different sensitivity and hysteresis settings for AH276 400mA (avg) output sink current Built-in protecting diode only for chip reverse power connecting -20°...

AH276 Data Sheet

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Part Number:
AH276
Supply Ability:
5000

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  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

On-chip Hall sensor with two different sensitivity and hysteresis settings for AH276
400mA (avg) output sink current
Built-in protecting diode only for chip reverse power connecting
-20°C to 85°C operating temperature
Low profile 4 pin SIP package


Application

Dual-coil Brush-less DC Motor
Dual-coil Brush-less DC Fan
Revolution Counting
Speed Measurement


Pinout

Connection Diagram


Specifications

Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
20
V
Reverse VCC Polarity Voltage
VRCC

-20
V
Magnetic flux density
B
Unlimited
Output "on" current Continuous
Ic
0.4
A
Hold
0.5
Peak (Start Up)
0.7
Operating temperature range
Ta
-20~+85
°C
Storage temperature range
Ts
-65~+150
°C
Package Power Dissipation
PD
550
mW
Maximum Junction Temp
Tj
150
°C



Description

AH276 are integrated Hall sensors with output drivers, mainly designed for electronic commutation of brush-less DC Fan. This AH276IC internally includes the regulator, protecting diode, Hall plate, amplifier,comparator, and a pair of complementary open-collector outputs (DO, DOB).While the magnetic flux density (B) is larger than operate point (Bop), DO will turn on (low), and meanwhile DOB will turn off (high).

Each output of AH276 is latched until B is lower than release point (Brp),and then DO,DOB transfer each state.For DC fan application, sometimes need to test power reverse connection condition. Internal diode only protects chip-side but not for coil-side. If necessary, add one external diode to block the reverse current from coil-side.




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