LV8805V-MPB-H [ONSEMI]
Direct PWM Structure Three-Phase Sensorless Fan Motor Driver, SSOP36J (275mil) Exposed Pad, 30-FNFLD;
| 型号： | LV8805V-MPB-H |
| 厂家： | 
ONSEMI |
| 描述： | Direct PWM Structure Three-Phase Sensorless Fan Motor Driver, SSOP36J (275mil) Exposed Pad, 30-FNFLD 驱动器 运动控制电子器件 风扇 信号电路 光电二极管 电动机控制 电机 信息通信管理 PC |
| 文件： | 总9页 (文件大小：272K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENA1748B
LV8805SV
Bi-CMOS LSI
PC and Server
http://onsemi.com
Fan Motor Driver
Overview
The LV8805SV is a motor driver for PC and server fans.
Feature
• Direct PWM three-phsae sensorless motor driver
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
max
CC
Conditions
Ratings
Unit
V
V
maximum supply voltage
V
16
CC
VG maximum supply voltage
OUT pin withstand voltage
OUT pin maximum output current
SOFTST pin withstand voltage
FR pin withstand voltage
VG max
21
V
V
I
max
16
V
OUT
max
UO pin, VO pin, WO pin
1.2
A
OUT
V
max
6
V
SOFTST
V
V
V
I
max
6
V
FR
PWMIN pin withstand voltage
FG output pin withstand voltage
FG pin output current
max
6
V
PWMIN
max
FG
16
V
max
5
mA
V
FG
RD output pin withstand voltage
RD pin output current
VRD max
IRD max
Pd max1
Pd max2
Topr
16
5
mA
W
W
°C
°C
Allowable Power dissipation 1
Allowable Power dissipation 2
Operating temperature
Independent IC
0.3
Mounted on designated board *1
0.95
-40 to +95
-55 to +150
Storage temperature
Tstg
*2
*1: When mounted on the designated 76.1mm × 114.3mm × 1.6mm, glass epoxy board (single-layer)
*2: Do not exceed Tjmax=150°C.
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current,
high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
92612NK 20120913-S00007/N0211 SY/60910 SY No.A1748-1/9
LV8805SV
Allowable Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
V
V
supply voltage
V
V
V
V
6 to 15
0 to VREG
0 to VREG
0 to VREG
CC
CC
SOFTST input voltage range
FR input voltage range
V
SOFTST
FR
V
MINSP input voltage range
V
MINSP
Electrical Characteristics at Ta = 25°C, V
= 12V, unless otherwise specified
CC
Ratings
typ
Parameter
Symbol
Conditions
Unit
mA
min
max
3.6
Circuit current 1
I
1
2.6
CC
Charge pump block
Charge pump output voltage
Regulator block
V
17
5
V
V
Ω
VG
5V regulator voltage
Output on resistance
V
4.75
5.25
2
VREG
Sum of high-/low-side output transistor on
resistance
Ron (H+L)
I
= 0.7A, V
= 12V, VG = 17V
CC
1.2
O
Startup oscillator (OSC) pin
OSC pin charge current
I
I
C
D
-2.5
2.5
μA
μA
OSC
OSC pin discharge current
PWM input (PWMIN) pin
OSC
High-level input voltage range
Low-level input voltage range
Range of PWM input frequency
Forward/reverse switching pin
High-level input voltage range
V
V
f
H
L
2.3
0
VREG
1
V
V
PWMIN
PWMIN
15
60
kHz
PWMIN
V
H
L
Order of current application :
UOUT→VOUT→WOUT
Order of current application :
UOUT→WOUT→VOUT
2.3
0
VREG
1
V
V
FR
Low-level input voltage range
V
FR
FG and RD output pins
FG output pin low-level voltage
FG output pin leak voltage
RD output pin low-level voltage
RD output pin leak voltage
Current limiter circuit
Limiter voltage
V
When I is 2mA
O
0.25
0.25
0.35
1
V
μA
V
FG
ILFG
When V
is 16V
When I is 2mA
FG
V
0.35
1
RD
O
ILRD
When V
is 16V
μA
RD
V
Limit current set to 1A when RF is 0.25Ω.
0.225
0.25
0.275
V
RF
Constraint protection circuit
CT pin high-level voltage
CT pin low-level voltage
CT pin charge current
V
V
H
L
2.25
0.43
-2.9
0.21
7
2.8
0.5
2.95
0.65
-2.1
0.32
13
V
V
CT
CT
I
I
C
-2.5
0.25
10
μA
μA
CT
CT pin discharge current
ICT charge/discharge ratio
Soft start circuit
D
CT
R
CT
Soft start releasing voltage
SOFTST pin charge current
Thermal protection circuit
V
2.5
0.6
V
SOFTST
SOFTST
I
μA
Thermal protection circuit operating
temperature
TSD
Design target *
150
180
210
°C
* : Design target value and no measurement is made. The thermal protection circuit is incorporated to protect the IC from burnout or thermal destruction. Since
it operates outside the IC's guaranteed operating range, the customer's thermal design should be performed so that the thermal protection circuit will not be
activated when the fan is running under normal operating conditions.
No.A1748-2/9
LV8805SV
Package Dimensions
unit : mm (typ)
3360
Pd max - Ta
1.2
Thermal resistance
evaluation board :
5.2
1.0
0.95
76.1 114.3 1.6mm3
x
x
20
glass epoxy
Thermal resistance
evaluation board
0.8
0.6
0.42
1 2
0.4
0.30
0.2
0.5
0.22
0.15
Independent IC
(0.35)
0.13
100
0
-
20
40
40
-20
0
60
80
120
Ambient temperature, Ta - C
SSOP20J(225mil)
Pin Assignment
SOFTST
FG
RD
1
2
3
4
20
19 PWMIN
F/R
18
17
CT
OSC
VREG
16 FIL
GND 5
LV8805SV
6
7
8
9
15
14
13
12
11
VG
CP
COMIN
COM
CPC
RF
V
CC
UO
VO
WO 10
Top view
No.A1748-3/9
LV8805SV
Block Diagram
FG
RD
CT
VG CPC
CP
CHARGE
PUMP
FG
RD
CTOSC
VREG
F/R
REFOSC
VREG
PWMIN
OSC
SENSORLESS
LOGIC
START
OSC
PRI DRIVE
FIL
V
CC
COMIN
COM
UO
VO
WO
SELECTOR
CURR LIM
COM
RF
GND SOFTST
No.A1748-4/9
LV8805SV
Pin Function
Pin No.
Pin name
Function
Equivalent circuit
1
FG
FG pulse output. This pin outputs a Hall
sensor system equivalent pulse signal.
Motor lockup detection output.
1
2
2
RD
Output is fixed high when motor is locked up.
3
CT
Motor lockup detection time setting.
When the motor lockup condition is detected,
the protection time period before the
protection circuit is activated is set by
connecting a cacacitor between this pin and
ground.
VREG
3
4
OSC
Motor startup frequency setting. A capacitor
must be connected between this pin and
ground. The startup frequency is adjusted by
controlling the charge/discharge current and
capacitance of the capacitor.
VREG
4
5
6
GND
VG
GND pin
Charge pump step-up voltage output.
7
8
A capacitor must be connected between this
V
CC
pin and the V
pin or ground.
CC
VREG
7
8
CP
Charge pump step-up pulse output pin.
A capacitor must be connected between this
pin and the CPC pin (pin 8).
6
CPC
Charge pump step-up pin.
A capacitor must be connected between this
pin and the CP pin (pin 7).
13
V
Power supply for the IC and motor.
Capacitors must be connected between
these pins and ground.
CC
13
12
11
10
9
UO
VO
WO
RF
Output pins. Connect these pins to the U, V,
and W of the motor coil.
12
11
10
Output current detection pins. The drive
current is detected by connecting a resistor
between these pins and ground.
9
Continued on next page.
No.A1748-5/9
LV8805SV
Continued from preceding page.
Pin No.
14
Pin name
COM
Function
Equivalent circuit
Motor middle point connection.
VG
15
COMIN
Motor position detection comparator filter
pin. A capacitor must be connected between
this pin and the FIL pin (pin 16).
14
16
17
FIL
Motor position detection comparator filter
pin. A capacitor must be connected between
this pin and the COMIN pin (pin 15).
15 16
VREG
Regulator voltage (5V) output.
A capacitor must be connected between
these pins and ground.
V
CC
17
VREF
18
F/R
Motor rotation direction switching. A
VREG
18
Reverse signal
high-level input causes current to flow into
the motor in the order of U, V, and W and a
low-level input in the order of U, W, and V.
Changing the order of current application
turns the motor in the opposite direction.
Forward/reverse
switching signal
Forward signal
VREG
19
PWMIN
PWM signal input pin.
"H" The output transistor is turned on by the
level voltage input. "L" The output transistor
is turned off by the level voltage input, and
the motor stops. The speed of the motor is
controlled by controlling Duty of the input
signal. When the pin opens, the motor
becomes all velocities.
19
20
SOFTST
Soft start time setting.
VREG
The motor can be started smoothly by
connecting a capacitor between this pin and
ground.
20
No.A1748-6/9
LV8805SV
Application Circuit Example
*3
V
CC
UO
VO
VG
CP
WO
COM
CPC
COMIN
FIL
VREG
*10
F/R
FG
FG
PWMIN
PWMIN
*11
*11
PWM Control Signal
F=20kHz to 50kHz
*11
RD
RF
FG
CT
SOFTST
OSC GND
*1
*8
1000pF
*1. Power supply and GND wiring
The GND is connected to the control circuit power supply system.
*2. Power-side power stabilization capacitor
For the power-side power stabilization capacitor, use a capacitor of 10μF or more.
Connect the capacitor between V and GND with a thick and along the shortest possible route.
CC
LV8805SV uses synchronous rectification for high efficiency drive. Synchronous rectification is effective for heat
reduction and higher efficiency. However, it may increase supply voltage.
If the supply voltage shall increase, make sure that it does not exceed the maximum ratings by inserting a zener diode
between power supply and GND.
*3. Reverse connection protection diode
This diode protects reverse connection.
Insert a diode between power supply and V
pin to protect the IC from destruction due to reverse connection.
CC
Connection of this diode is not necessary required.
*4. COMIN and FIL pins
These pins are used to connect the filter capacitor. The LV8804 uses the back EMF signal generated when the motor is
running to detect the information on the rotor position. The IC dertermines the timing at which the output block
applies current to the motor based on the position information obtained here. Insert a filter capacitor with a capacitance
ranging from (1,000pF to 10,000pF) between the COMIN pin and FIL pin to prevent any motor startup missoperation
that is caused by noise. However, care must be taken since an excessively high capacitance will give rise to
deterioration in efficiency and delays in the output power-on timing while the motor is running at high speed.
Furthermore, connect the capacitor between the COMIN pin and FIL pin as close as possible in order to avoid the
effects of noise from other sources.
No.A1748-7/9
LV8805SV
*5. CT pin
This pin is used to connect the lock detection capacitor.
The constant-current charging and constant-current discharging circuits inporporated causes locking when the pin
voltage reaches 2.5V, and releasing the lock protection when it drops to 0.5V. This pin must be connected to the GND
when it is not going to be used.
*6. RF pins
These pins are used to set the current limit.
When the pin voltage exceeds 0.25V, the current is limited, and regeneration mode is established. In the application
circuit, this voltage is set in such a way that the current limit will be established at 1A.
The calculation formula is given below.
RF resistance = 0.25V/target current limit value
*7. SOFTST pin
This pin is used to set the soft start.
By connecting a capacitor between this pin and GND, the motor speed can be increased gradually.
When the pin voltage exceeds 2.5V, the soft start is released, and the LV8804V is switched to normal control.
If the soft start function is not going to be used, connect the pin to the VREG pin.
*8. OSC pin
This pin is used to connect the capacitor for setting the startup frequency.
A capacitor with a capacitance ranging from about 500pF to 2,200pF (recommendation) must be connected between
this pin and GND.
The OSC pin determines the motor startup frequency, so be sure to connect a capacitor to it.
<How to select the capacitance>
Select a capacitance value that will result in the shortest possible startup time for achieving the target speed and
produce minimal variations in the startup time. If the capacitance is too high, variations in the startup time will
increase; conversely, if it is too low, the motor may idle. The optimum OSC constant depends on the motor
characteristics and startup current, so be sure to recheck them when the type of motor used or circuit specifications are
changed.
*9. VG, CP, and CPC pins
These pins are used to connect the capacitors to generate the pre-drive voltage and stabilize the pre-drive power
supply.
Be sure to connect these capacitors in order to generate the drive voltage for the high-side (upper) output DMOS
transistor.
*10. VREG pins
These are the control system power supply pin and regulator output pin, which create the power supply of the control
unit. Be sure to connect a capacitor between this pin and GND in order to stabilize control system operation.
Since these pins are used to supply current for control and generate the charge pump voltage, connect a capacitor with
a capacitance that is higher than that of the capacitor connected to the charge pump.
Both the VREG pins (pins 3 and 4) must be short-circuited on the print pattern.
*11. Pin protection resistor
It is recommended that resistors higher than 1kΩ are connected serially to protect pins against misconnection such as
GND open and reverse connection.
No.A1748-8/9
LV8805SV
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PS No.A1748-9/9
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