Document
Datasheet
For Air-Conditioner Fan Motor
3-Phase Brushless Fan Motor Driver
BM6248FS
General Description
This 3-phase Brushless Fan motor driver IC adopts PrestoMOS™ as the output transistor, and put in a small full molding package with the 180° sinusoidal commutation controller chip and the high voltage gate driver chip. The protection circuits for overcurrent, overheating, under voltage lock out and the high voltage bootstrap diode with current regulation are built-in. It provides downsizing the built-in PCB of the motor.
Features
600V PrestoMOS™ Built-in Output Current 1.5A Bootstrap operation by floating high side driver
(including diode) 180° Sinusoidal Commutation Logic PWM Control (Upper and lower arm switching) Phase control supported from 0° to +40° at 1° intervals Rotational Direction Switch FG signal output with pulse number switch (4 or 12) VREG Output (5V/30mA) Protection circuits provided: CL, OCP, TSD, UVLO,
MLP and the external fault input Fault Output (open drain)
Applications
Air Conditioners; Air Purifiers; Water Pumps; Dishwashers; Washing Machines
Typical Application Circuit
Key Specifications
Output MOSFET Voltage: Driver Output Current (DC): Driver Output Current (Pulse): Output MOSFET DC On Resistance: Duty Control Voltage Range: Phase Control Range: Maximum Junction Temperature:
600V
±1.5A (Max) ±2.5A (Max)
2.7Ω (Typ) 2.1V to 5.4V
0° to +40° +150°C
Package SSOP-A54_36A
W(Typ) x D(Typ) x H(Max) 2.0mm x 14.1mm x 2.4mm
SSOP-A54_36 SSOP-A54_36A
VDC GND VCC VSP
R1 C1
C2~C4
HW HV HU
R3
R2 C11
FG
Q1
DTR
VREG
R6 R5
C10 R12 R11 R10 R9
C14 R13
D1 C5 C6
R4 R8 C12
C7 C13 C8
M
C9
R7
Figure 1. Application Circuit Example
Product structure : Semiconductor IC
www.rohm.com © 2018 ROHM Co., Ltd. All rights reserved. TSZ22111 • 14 • 001
This product has no designed protection against radioactive rays
1/30
TSZ02201-0P1P0C402200-1-2 22.Feb.2019 Rev.002
BM6248FS
Contents
General Description ........................................................................................................................................................................1 Features..........................................................................................................................................................................................1 Applications ....................................................................................................................................................................................1 Key Specifications ..........................................................................................................................................................................1 Package ..................................................................................................................................................................................1 Typical Application Circuit ...............................................................................................................................................................1 Contents .........................................................................................................................................................................................2 Block Diagram and Pin Configuration .............................................................................................................................................3 Pin Description................................................................................................................................................................................3 Description of Blocks ......................................................................................................................................................................4 Controller Outputs and Operation Mode Summary.........................................................................................................................9 Absolute Maximum Ratings ..........................................................................................................................................................10 Thermal Resistance .....................................................................................................................................................................10 Recommended Operating Conditions........................................................................................................................................... 11 Electrical Characteristics (Driver part) .......................................................................................................................................... 11 Electrical Characteristics (Controller part) ...........................................................................................................................