BU6909AGFT Datasheet, PDF (1/21 Pages) Rohm – Built in HALL element

DC Brushless Fan Motor Driver
5V Single-phase Full-wave
Fan Motor Driver
BU6909AGFT
Description
The BU6909AGFT is a 5V single-phase full-wave FAN motor driver with built in HALL element. It is part of the DC brushless
FAN motor driver series. BU6909AGFT is built in a compact package and provides Auto Gain Control function (AGC), silent
drive by soft switching, and low battery consumption via its standby function. BU6909AGFT is best used for notebook PC
cooling FANs.
Features
„ Built in HALL element
„ Auto Gain Control function (AGC)
„ Soft switching drive (PWM type)
„ Low PWM duty start up
„ Quick start function
„ Stand-by mode
„ Incorporates lock protection and automatic restart
circuit
„ Compact package (GFT:TSSOF6 flat lead package)
When TSSOF6 is mounted, package thickness is
0.3mm
„ Rotating speed pulse signal (FG) output
„ PWM speed control
Package
TSSOF6
W(Typ) x D(Typ) x H(Max)
2.90mm x 3.80mm x 0.8mm
TSSOF6
Applications
„ For compact 5V FAN such as notebook PC cooling FAN
Absolute Maximum Ratings
Parameter
Symbol
Limit
Unit
Supply Voltage
Power Dissipation
V_CC
7
V
Pd
0.54^{(Note 1)}
W
Operating Temperature
Topr
-40 to +85
°C
Storage Temperature
Tstg
-55 to +125
°C
Output Voltage
Output Current
V_OMAX
7
V
I_OMAX
800^{(Note 2)}
mA
FG Signal Output Voltage
V_FG
7
V
FG Signal Output Current
I_FG
10
mA
Junction Temperature
Tjmax
125
°C
(Note 1) Reduce by 5.4mW/℃ over 25℃. (On 70.0mm×70.0mm×1.6mm glass epoxy board)
(Note 2) This value is not to exceed Pd.
Caution: 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.
Recommended Operating Condition
Parameter
Symbol
Limit
Unit
Operating Supply Voltage Range
V_CC
1.8 to 5.5
V
○Product structure：Silicon monolithic integrated circuit ○This product has no protection against radioactive rays
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28.Oct.2014 Rev.002