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Part Number: A266
Description: A266 is an integrated Hall sensors with output drivers designed for electronic commutation of brushles...
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A266
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General Description
A266 General Description
A266 is an integrated Hall sensors with output drivers designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifies the Hall voltage, and a Schmitt trigger to provide switching hysteresis for noise rejection, and complementary open-collector drivers for sinking large current loads. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range.
If a magnetic flux density larger than threshold Bop,DO is turned on(low) and DOB is turned off (high). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off and DOB turned on.
A266 is rated for operation over temperature range from -20 oC to 100 oC and voltage range from 3.5V to 28V. The devices are available in low cost die forms or rugged 4 pin SIP packages.
A266 Maximum Ratings
Supply Voltage, Vcc ----------------------------------- 28V
Reverse VCC Polarity Voltage, VRCC-----------------35V
Magnetic flux density, B------------------------------- Unlimited
Output OFF Voltage, Vce-------------------------------50V(Note 1)
Output ON Current, Ic
Continuous ----------------------------------------------300mA
Hold-------- -----------------------------------------------400mA
Peak (Start Up)-----------------------------------------700mA
Operating Temperature Range,
Ta -------------------------------------------------------- (-20 to +100 )
Storage Temperature Range,
Ts -------------------------------------------------------- (-65 to +150 )
Package Power Dissipation,
Pd----------------------------------------------------------550mW
Maximum Junction Temp , Tj--------------------------175
(Note1) Output Zener protection voltage.
Reverse VCC Polarity Voltage, VRCC-----------------35V
Magnetic flux density, B------------------------------- Unlimited
Output OFF Voltage, Vce-------------------------------50V(Note 1)
Output ON Current, Ic
Continuous ----------------------------------------------300mA
Hold-------- -----------------------------------------------400mA
Peak (Start Up)-----------------------------------------700mA
Operating Temperature Range,
Ta -------------------------------------------------------- (-20 to +100 )
Storage Temperature Range,
Ts -------------------------------------------------------- (-65 to +150 )
Package Power Dissipation,
Pd----------------------------------------------------------550mW
Maximum Junction Temp , Tj--------------------------175
(Note1) Output Zener protection voltage.
A266 Features
1) On-chip Hall sensor IC with two different sensitivity and hysteresis settings for A266.
2) Internal bandgap regulator allows temperature compensated operations and a wide operating voltage range.
3) High output sinking capability up to 300mA for driving large load.
4) Lower current change rate reduces the peak output voltages during switching.
5) Build in protection diode for chip reverse power connecting.
6) Package: SIP-4.
2) Internal bandgap regulator allows temperature compensated operations and a wide operating voltage range.
3) High output sinking capability up to 300mA for driving large load.
4) Lower current change rate reduces the peak output voltages during switching.
5) Build in protection diode for chip reverse power connecting.
6) Package: SIP-4.
A266 Typical Application
1) Brushless DC Motor
2) Brushless DC Fan
3) Revolution Counting
4) Speed Measurement
2) Brushless DC Fan
3) Revolution Counting
4) Speed Measurement
A266
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