UNISONIC TECHNOLOGIES CO., LTD

H654

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

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Copyright © 2005 Unisonic Technologies Co., Ltd

QW-R118-003,B

COMPLEMENTARY OUTPUT

HALL EFFECT LATCH

DESCRIPTION

The UTC H654 is integrated Hall sensors with complementary

output drivers designed for electronic commutation of brushless DC

Fan. It composed of an on-chip Hall voltage generator, a differential

amplifier, Schmitt trigger, an open-collector output on a single chip.

Furthermore, an internal bandgap regulator allows temperature

compensated operations and a wide operating supply range. An

on-chip protection diode is implemented to prevent reverse power

fault.

will be turned on(low) and DOB be turned off(high). The output state

is reversal to turned off and DOB turned on.

FEATURES

* Operate from 3.5V ~ 20V supply voltage.

* On-chip Hall sensor with two different sensitivity and hysteresis

settings.

* High output sinking capability up to 300mA for driving large load.

* Lower current change rate reduces the peak output voltages during

switching.

* Build-in protecting diode for chip reversal power connecting.(Note1)

SIP-4

1

*Pb-free plating product number: H654L

ORDERING INFORMATION

Order Number

Normal

Lead Free Plating

Package

Packing

H654-G04-K

H654L-G04-K

SIP-4

Bulk

H654L-G04-K

(1)Packing Type

(2)Package Type

(3)Lead Plating

(1) B: Bulk

(2) G04: SIP-4

(3) L: Lead Free Plating, Blank: Pb/Sn

PIN DESCRIPTION

PIN NO. PIN NAME

P/I/O

DESCRIPTION

1

P

Positive Power Supply

2

DO

O

Output Pin

3

DOB

O

Output Pin

4

P

Ground