ROHM BD6971FS Technical data

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STRUCTURE Silicon Monolithic Integrated Circuit

PRODUCT SERIES Single-Phase Full-Wave Motor Driver for Fan Motor

TYPE

ＢＤ６９７１ＦＳ

FEATURES Speed controllable by DC/PWM input

Current limit circuit

PWM soft switching drive

〇ABSOLUTE MAXIMUM RA TINGS

Parameter

Symbol Limit Unit
Supply voltage Vcc 20 V
Power dissipation Pd 812.5＊ mW
Operating temperature Topr -40 to +100 °C
Storage temperature Tstg -55 to +150 °C
Output current Iomax 1.0＊＊ A

FG output current
FG output voltage
REF current ability
HB current ability

IFG 10 mA

VFG 20 V

IREF 5 mA

IHB 5 mA
Input voltage(H+, H-, TH, MIN, CS) VIN 7 V
Junction temperature Tjmax 150 °C

＊Reduce by 6.5mW/°C over Ta=25°C.

(On 70.0mm×70.0mm×1.6mm glass epoxy board)

＊＊This value is not to exceed Pd.

〇OPERATING CONDITIONS

Parameter

Symbol

Limit Unit

Operating supply voltage range Vcc 3.5 to 17.0 V
Hall input voltage range VH

0 to Vcc-2.0 V

0 to 7.0 V
TH input voltage range VTH 0 to VREF V
MIN input voltage range VMIN 0 to VREF V

＊This product is not designed for production against radioactive rays.

less than Vcc=9.0V
more than Vcc=9.0V

REV. B

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〇ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta=25°C, Vcc=12V)

Parameter

Symbol

Min. Typ. Max.

Limit

Unit Conditions

Circuit current Icc 3 5 8 mA
Hall input hysteresis + VHYS+ 4 9 16 mV
Hall input hysteresis - VHYS- -18 -13 -8 mV

Output voltage VO - 0.6 0.9 V

Io=200mA,

Upper and Lower total
Lock detection ON time TON 0.3 0.5 0.7 s
Lock detection OFF time TOFF 3.0 5.0 7.0 s
FG output low voltage VFGL - 0.15 0.3 V IFG =2mA
FG output leak current IFGL - - 10 μA VFG=17V
OSC low voltage VOSCL 0.8 1.0 1.2 V
OSC high voltage VOSCH 2.3 2.5 2.7 V
OSC charge current ICOSC -16 -8 -4 μA
OSC discharge current IDOSC 4 8 16 μA

VTH=VREF×0.222
Output ON Duty 1 DUTY1 75 80 85 %

OUT1-OUT2=1kΩ,

COSC=100pF

VTH=VREF×0.294
Output ON Duty 2 DUTY2 45 50 55 %

OUT1-OUT2=1kΩ,

COSC=100pF

VTH=VREF×0.367
Output ON Duty 3 DUTY3 15 20 25 %

OUT1-OUT2=1kΩ,

COSC=100pF
REF voltage VREF 5.8 6.0 6.2 V IREF =-2mA
Hall bias voltage VHB 1.10 1.3 1.5 V IHB =-2mA
Current limit voltage VCL 280 310 340 mV
TH bias current ITH - - 0.2 μA
MIN bias current IMIN - - 0.2 μA
CS bias current ICS - - 0.2 μA

REV. B