US90A Просмотр технического описания (PDF) - Melexis Microelectronic Systems

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US90A

24V Hall IC Fan Driver

Melexis Microelectronic Systems  

US90A / US91A

24V Hall IC Fan Driver

6 General Electrical Specifications

DC Operating Parameters TA = 25oC, VDD = 24V (unless otherwise specified)

Parameter

Symbol Test Conditions

Fan Supply Voltage

VDD

Operating, RCOIL = 50Ω

Supply Current

IDD

Output Saturation Voltage

VDSON 1,2 IOUT = 150mA

Output Saturation Voltage

VDSON 1,2 IOUT = 250mA

Output Clamp Voltage

VOUT 1,2

FG / RD Output Low Voltage

VOL

IOL = 10mA

FG / RD Output Clamp Voltage VCLAMP

FG / RD Output Leakage Current ILEAK

VFG (VRD) = 18V

DC Thermal Resistance

RTHja

One-sided PCB, zero LFPM

VK Thermal Resistance

RTHja

One-sided PCB, zero LFPM

VA Thermal Resistance

RTHja

One-sided PCB, zero LFPM

Locked Rotor Period

TON

Locked Rotor Period

TOFF

Output Switching Delay

TDELAY “Dead time” when both drivers are off

Table 3: General electrical specifications

Min Typ

4.7(1)

2

375

625

60

250

28

150

200

170

0.25

1.5

200

Note 1: The minimal value of VDD should be determined using the following equation: VDD = 4.5V + RCOIL * IDD

Max Units

30

V

4

mA

mV

mV

V

500 mV

V

10

µA

°C/Watt

°C/Watt

°C/Watt

S

S

us

7 Magnetic Specifications

DC Operating Parameters TA = 25oC, VDD = 24V (unless otherwise specified)

Parameter

Symbol Test Conditions Min Typ Max Units

Operate point

BOP

3

6

mT

Release point

BRP

-6

-3

mT

Hysteresis

BHYST

2

6

mT

Table 4: Magnetic specifications

8 Driver Output vs Magnetic Pole

Parameter

North pole

Test Conditions

B < Brp – all packages

South pole

B > Bop - all packages

Table 5: Driver output vs. magnetic pole

OUT1

High

Low

OUT2

Low

High

Note 3: The magnetic pole is applied facing the branded side of the package

390109026302

Rev 002

Page 4 of 12

Data Sheet

Apr/07

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