DC Brushless Fan Motor Driver
Multifunction Single-phase Full-wave
Fan Motor Driver
BD61250MUV is pre-driver IC to drive single phase H bridge output composed of external MOS FET.
The power supply input terminal and the drive output have voltage rating of 40V, so it can be used in a 24V power supply
without using voltage drop down circuit.
Pre driver for external power MOS FET
Speed controllable by PWM / DC voltage
Minimum output duty limit
Input / output duty slope adjustment
Silent drive by the PWM soft switching
Lead angle setting
Lock protection and automatic restart
Rotation speed pulse signal(FG), Lock alarm
Drive PWM frequency selectable (50kHz/25kHz)
General consumer equipment of Desktop PC, Server,
Office equipment, Copier, FAX, Laser Printer, etc.
W (Typ) x D (Typ) x H (Max)
4.00mm x 4.00mm x 1.00mm
Absolute Maximum Ratings
VCC 40 V
Operating Temperature Range
Topr -40 to +105 °C
Storage Temperature Range
-55 to +150
Maximum Junction Temperature
High Side Output Voltage
VOH VCC-7 to VCC V
Low Side Output Voltage
VOL 0 to 7 V
IOMAX 10 mA
Signal Output Voltage
VSIG 40 V
Signal Output Current
ISIG 10 mA
Reference Voltage (REF) Output Current
IREF 10 mA
Input Voltage1 (PWMIN, CS, FSEL, SSEL, STBEN)
Input Voltage2 (HP, HM, ADC input terminal)
(Note 1) Derate by 6.64mW/°C when operating above Ta=25°C. (Mounted on 114.3mm×76.2mm×1.57mm 1layer board)
Caution 1: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is
operated over the absolute maximum ratings.
Caution 2: Should by any chance the maximum junction temperature rating be exceeded the rise in temperature of the chip may result in deterioration of the
properties of the chip. In case of exceeding this absolute maximum rating, design a PCB boards with power dissipation and thermal resistance
taken into consideration by increasing board size and copper area so as not to exceed the maximum junction temperature rating.
○Product structure：Silicon monolithic integrated circuit
© 2016 ROHM Co., Ltd. All rights reserved.
○This product has no designed protection against radioactive rays