Datasheet
DC Brushless Fan Motor Drivers
Multifunction Single-phase Full-wave
Fan Motor Driver
BD61245EFV
General Description
BD61245EFV is a 1chip driver that is composed of
H-bridge power DMOS FET. Moreover, the circuit
configuration is restructured, and convenience has been
improved by reducing the external parts and simplifying
the setting compared with the conventional driver.
Key Specifications
Operating Voltage Range:
Operating Temperature Range:
Output Voltage(total):
4V to 16V
–40°C to +105°C
0.2V(Typ) at 0.4A
Features
High Heat Radiation Package
Driver Including Power DMOS FET
Speed Controllable by DC / PWM Input
I/O Duty Slope Adjust
PWM Soft Switching
Current Limit
Start Duty Assist
Lock Protection and Automatic Restart
Quick Start
Rotation Speed Pulse Signal (FG) Output
Package
W (Typ) x D (Typ) x H (Max)
5.00mm x 6.40mm x 1.00mm
HTSSOP-B16
Applications
Fan motors for general consumer equipment of desktop PC, Projector, etc.
Typical Application Circuits
SIG
1
2
FG
H–
H+
SST
SLP
PWM
OUT2
RNF
GND
ADJ
SSW
ZPER
MIN
REF
VCC
OUT1
16
15
SIG
1
2
FG
H–
H+
SST
SLP
PWM
OUT2
RNF
GND
ADJ
SSW
ZPER
MIN
REF
VCC
OUT1
16
15
14
13
12
11
10
9
H
3
4
5
14
13
12
11
10
9
H
3
4
5
6
7
8
DC
PWM
6
7
8
M
＋
－
M
＋
－
Figure 1. Application of Direct PWM Input
Figure 2. Application of DC Voltage Input
〇Product
structure : Silicon monolithic integrated circuit
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〇This
product has no designed protection against radioactive rays
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BD61245EFV
Pin Configuration
(TOP VIEW)
FG
H–
H+
SST
SLP
PWM
OUT2
RNF
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
GND
1
Block Diagram
FG
SIGNAL
OUTPUT
OSC
TSD
GND
16
ADJ
2
H–
-
COMP
+
A/D
ADJ
15
SSW
ZPER
MIN
REF
5
3
H+
A/D
SSW
14
4
SST
A/D
CONTROL
LOGIC
A/D
ZPER
13
SLP
INSIDE
REG
A/D
A/D
MIN
12
VCC
6
OUT1
7
PWM
V
CL
FILTER
PRE-
DRIVER
REFE-
RENCE
REF
11
OUT2
+
COMP
-
VCC
10
Pin Description
Pin No. Pin Name
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
FG
H–
H+
SST
SLP
PWM
OUT2
RNF
OUT1
VCC
REF
MIN
ZPER
SSW
ADJ
GND
Function
Speed pulse signal output terminal
Hall – input terminal
Hall + input terminal
8
RNF
OUT1
9
Soft start setting terminal
I/O duty slope setting terminal
PWM input duty terminal
Motor output terminal 2
Output current detecting resistor
connecting terminal (motor ground)
Motor output terminal 1
Power supply terminal
Reference voltage output terminal
Minimum output duty setting terminal
Re-circulate period setting terminal
Soft switching setting terminal
Output duty correction setting
terminal
Ground terminal (signal ground)
I/O Truth Table
Hall Input
H+
H–
H
L
L
H
Driver Output
OUT1
OUT2
L
H
H
L
FG
Hi-Z
L
H; High, L; Low, Hi-Z; High impedance
FG output is open-drain type.
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BD61245EFV
Absolute Maximum Ratings
Parameter
Supply Voltage
Power Dissipation
Operating Temperature Range
Storage Temperature Range
Output Voltage
Output Current
Rotation Speed Pulse Signal (FG) Output Voltage
Rotation Speed Pulse Signal (FG) Output Current
Reference Voltage (REF) Output Current
Input Voltage1
(H+,H–,MIN,SSW,SST,ZPER,SLP,ADJ)
Input Voltage2 (PWM)
Junction Temperature
Symbol
V
CC
Pd
Topr
Tstg
V
OMAX
I
OMAX
V
FG
I
FG
I
REF
V
IN1
V
IN2
Tj
Rating
18
(Note 1)
0.95
–40 to +105
–55 to +150
18
(Note 2)
1.8
18
10
10
2.6
6.5
150
Unit
V
W
°C
°C
V
A
V
mA
mA
V
V
°C
(Note 1)
Derate by 7.6mW/°C when operating over Ta=25°C.
(Note 2)
Do not exceed Pd and Tj=150°C.
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.
Thermal Resistance
(Note 1)
Parameter
HTSSOP-B16
Junction to Ambient
Junction to Top Characterization Parameter
(Note 2)
Symbol
Thermal Resistance (Typ)
1s
(Note 3)
2s2p
(Note
4)
Unit
θ
JA
Ψ
JT
131.5
9
30.8
3
°C/W
°C/W
(Note 1)Based
on JESD51-2A(Still-Air)
(Note 2)The
thermal characterization parameter to report the difference between junction temperature and the temperature at the top center of the outside
surface of the component package.
(Note 3)Using
a PCB board based on JESD51-3.
Layer Number of
Measurement Board
Single
Top
Copper Pattern
Footprints and Traces
Layer Number of
Measurement Board
4 Layers
Top
Copper Pattern
Footprints and Traces
Material
FR-4
Board Size
114.3mm x 76.2mm x 1.57mmt
Thickness
70μm
(Note 4)Using
a PCB board based on JESD51-5, 7.
Material
FR-4
Board Size
114.3mm x 76.2mm x 1.6mmt
2 Internal Layers
Thermal Via
(Note 5)
Pitch
1.20mm
Bottom
Copper Pattern
74.2mm x 74.2mm
Thickness
70μm
35μm
Diameter
Φ0.30mm
Thickness
70μm
Copper Pattern
74.2mm x 74.2mm
Thickness
(Note 5)
This thermal via connects with the copper pattern of all layers..
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BD61245EFV
Recommended Operating Conditions
Parameter
Operating Supply Voltage
Hall Input Voltage
PWM Input Frequency
Symbol
V
CC
V
H
f
PWM
Min
4
0
15
Typ
12
-
-
Max
16
2
50
Unit
V
V
kHz
Electrical Characteristics (Unless otherwise specified Ta=25°C, V
CC
=12V)
Parameter
Circuit Current
Output Voltage
Lock Detection ON Time
Lock Detection OFF Time
Lock Detection OFF/ON Ratio
Hall Input Hysteresis Voltage
FG Output Low Voltage
FG Output Leak Current
PWM Input High Level Voltage
PWM Input Low Level Voltage
PWM Input Current
Reference Voltage
Current Limit Setting Voltage
Symbol
I
CC
V
O
t
ON
t
OFF
r
LCK
V
HYS+
V
FGL
I
FGL
V
PWMH
V
PWML
I
PWMH
I
PWML
V
REF
V
CL
Limit
Min
1.8
-
0.3
3.0
8
±7
-
-
2.5
-0.3
-10
-50
2.2
120
Typ
3.3
0.2
0.5
5.0
10
±12
-
-
-
-
0
-25
2.4
150
Max
4.8
0.44
0.7
7.0
12
±17
0.3
10
5.0
1.0
10
-12
2.6
180
Unit
mA
V
s
s
-
mV
V
μA
V
V
μA
μA
V
mV
I
O
=±400mA,
High and low side total
Conditions
Characteristic
Data
Figure 3
Figure 4 to
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12 to
Figure 13
Figure 14
-
-
Figure 15 to
Figure 16
Figure 17 to
Figure 18
Figure 19
r
LCK
=t
OFF
/ t
ON
I
FG
=5mA
V
FG
=16V
V
PWM
=5V
V
PWM
=0V
I
REF
=-1mA
For parameters involving current, positive notation means inflow of current to IC while negative notation means outflow of current from IC.
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BD61245EFV
Typical Performance Curves (Reference Data)
8
0.00
Output High Voltage: V
OH
[V]
Circuit Current: I
CC
[mA]
6
-0.15
4
105°C
25°C
–40°C
-0.30
–40°C
25°C
-0.45
2
Operating Voltage Range
105°C
-0.60
0
0
5
10
15
20
Supply Voltage: V
CC
[V]
0.0
0.6
1.2
1.8
Output Source Current: I
O
[A]
Figure 3. Circuit Current vs Supply Voltage
Figure 4. Output High Voltage vs Output Source Current
(V
CC
=12V)
0.00
0.60
-0.15
Output Low Voltage: V
OL
[V]
Output High Voltage: V
OH
[V]
0.45
105°C
25°C
-0.30
0.30
–40°C
16V
12V
-0.45
0.15
4V
-0.60
0.0
0.6
1.2
1.8
0.00
0.0
0.6
1.2
1.8
Output Source Current: I
O
[A]
Output Sink Current: I
O
[A]
Figure 6. Output Low Voltage vs Output Sink Current
(V
CC
=12V)
Figure 5. Output High Voltage vs Output Source Current
(Ta=25°C)
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