AH284

HALL-EFFECT SMART FAN MOTOR CONTROLLER

AH284 Rev. 3

3 of 9

JANUARY 2007

www.diodes.com

DOB

DO

GND

12V

D2

L2

L1

284

12

3

4

D1

R1

R2

C1

C2

C3

56

Notes: R1, R2: typical

C1, C2, C3: typical 2.2 F

The R, C value need to be fine tuned

based on coils design.

Ω

12V Brush-Less DC Fan

Characteristics

Symbol

Rating

Unit

Supply Voltage

24

V

SIP4/SOT89-5

500

Output Current

700

mA

SIP4

550

Power Dissipation

SOT89-5

800

mW

Operating Temperature

-40 ~ 100

°C

Storage Temperature

-55 ~ 150

°C

Maximum Junction Temp.

Tj

150

°C

SIP4

227

Thermal Resistance

JA

θ

SOT89-5

156

°C/W

Tc

JC

θ

JA

θ

Note:

JA

θ

should be confirmed with what heat sink thermal resistance. If no heat sink contacting,

JA

θ

is almost the same as

JC

µ