Diodes AH278 Manual do Utilizador descarregar pdf

HIGH VOLTAGE HALL EFFECT LATCH AH278

Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited

Data Sheet

General Description

The AH278 is an integrated Hall sensor with output

driver designed for electronic commutation of brush-

less DC motor applications. The device includes an on-

chip Hall sensor for magnetic sensing, an amplifier

that amplifies the Hall voltage, a Schmitt trigger to

provide switching hysteresis for noise rejection and

two complementary open-collector drivers for sinking

large load current. It also includes an internal band-gap

regulator which is used to provide bias voltage for

internal circuits and allows a wide operating supply

voltage ranges.

Placing the device in a variable magnetic field, if the

magnetic flux density is larger than threshold B

, the

pin DO will be turned low (on) and pin DOB will be

turned high (off). This output state is held until the

magnetic flux density reverses and falls below B

RP,

then causes DO to be turned high (off) and DOB

turned low (on).

AH278 is available in TO-94 (SIP-4L) package.

Features

· On-Chip Hall Sensor

· 4V to 30V Supply Voltage

· 500mA (avg) Output Sink Current

· Build in Protection Diode for Reverse Power

Connecting

· -20

C to 85

C Operating Temperature

· Low Profile TO-94 (SIP-4L) Package

· Build in Over Temperature Protection Function

· ESD Rating: 300V(Machine Model)

Applications

· 12V/24V Dual-Coil Brushless DC Motor/Fan

· Power Supply and Switchboard

· Communications Facilities

· Industrial Equipment

Figure 1. Package Type of AH278

TO-94

1 2 3 4 5 6 ... 10 11

Resumo do Conteúdo

Página 1 - Applications

HIGH VOLTAGE HALL EFFECT LATCH AH278 1Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 2 - Pin Description

HIGH VOLTAGE HALL EFFECT LATCH AH278 10Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturin

Página 3 - Functional Block Diagram

IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the

Página 4

HIGH VOLTAGE HALL EFFECT LATCH AH278 2Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 5 - Magnetic Characteristics

HIGH VOLTAGE HALL EFFECT LATCH AH278 3Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 6

HIGH VOLTAGE HALL EFFECT LATCH AH278 4Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 7

5Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Data SheetHIGH VOLTAGE HALL EFFECT LATCH

Página 8 - (Continued)

HIGH VOLTAGE HALL EFFECT LATCH AH278 6Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 9 - Typical Applications

7Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Data SheetHIGH VOLTAGE HALL EFFECT LATCH

Página 10 - Unit: mm(inch)TO-94

HIGH VOLTAGE HALL EFFECT LATCH AH278 8Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing

Página 11

9Nov. 2009 Rev. 1. 4 BCD Semiconductor Manufacturing Limited Data SheetHIGH VOLTAGE HALL EFFECT LATCH

Comentários a estes Manuais

Sem comentários

Diodes AH278 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Hardware Diodes AH278. Diodes AH278 User Manual Manual do Utilizador

Resumo do Conteúdo

Comentários a estes Manuais

Manuais e produtos relacionados com Hardware Diodes AH278