BD6346FV Datasheet, PDF (1/25 Pages) Rohm – Three-phase Full-wave Fan Motor Driver

Datasheet
DC Brushless FAN Motor Drivers
Three-phase Full-wave
Fan Motor Driver
BD6346FV
˔General Description
BD6346FV is a three phase, sensorless motor 1chip driver
with integrated power DMOS MOSFETs. Its feature is
sensor-less drive which doesn’t require a hall device as a
location detection sensor. Furthermore, introducing a PWM
soft switched driving mechanism achieves silent
operations and low vibrations.
˔Features
„ Integrated Power DMOS FET driver
„ Sensorless PWM soft switched drive
„ Lock protection and automatic restart
„ DC voltage/direct PWM input ,speed control
„ Current limit
„ Soft-Start function
„ Quick-Start function
„ Rotating speed pulse signal(FG)output
„ UVLO
˔Package(s)



SSOP-B20
W (Typ.) x D (Typ.) x H (Max.)
6.50mm x 6.40mm x 1.45mm
SSOP-B20
˔Applications
„ Refrigerator, Sever, Desktop, cooling Fan for general
consumer equipment
˔Absolute maximum ratings
Parameter
Supply voltage
Power dissipation
Operating temperature
Storage temperature
Output voltage
Output Current
FG signal output voltage
FG signal output current
REF current ability
Symbol
Limit
Unit
V_CC
20
V
P_d
1200*¹
mW
T_opr
-40 to +100
ˆ
T_stg
-55 to +150
ˆ
V_omax
20
V
I_omax
1.2*²
A
V_FG
20
V
I_FG
10
mA
I_REF
8
mA
Input voltage 1 (COM)
Vin1
20
V
Input voltage2 (CONT, MIN, SS, OSC, TOSC, SEL) Vin2
6.5
V
Junction temperature
Tjmax
150
°C
*1 Reduce by 9.6mW/°C, over Ta=25°C (on 70.0mm×70.0mm×1.6mm glass epoxy board)
*2 This value is not exceed Pd and ASO
˔Recommended operating conditions
Parameter
supply voltage range
Input voltage (CONT)
Input voltage (MIN)
Input frequency (CONT, OSC=GND setting)
Symbol
Limit
Unit
Vcc
5.5 to 17.0
V
Vcont
0 to Vref
V
Vmin
Voscl to Vref
V
Fcont
20 to 50
kHz
˓Product structureɿSilicon monolithic integrated circuit
˓This product is not designed for protection against radioactive rays
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TSZ02201-0H1H0B100520-1-2
17.Jun.2013 Rev.001