ENA2205 D

Ordering number : ENA2205
LV8850GA
Bi-CMOS IC
Three-Phase sensorless
FAN Motor Pre-Driver
http://onsemi.com
Overview
LV8850GA is a pre-driver IC which is three-phase, sensorless and drives with PWM.
LV8850GA drives without a hole sensor, which is suitable for driving high-current motor which requires high
reliability and long life.
Function
• VCC+7V charge pump booster circuit for output drive
• Integrated Synchronous Rectifier circuit (Selected by SYNSEL pin)
• PWM or DC input signal is selectable (Selected by CTLSW pin)
• Adjustable PWM frequency (By the external capacitor at DC input mode)
• Integrated Current Limit circuit (highly accurate detection by using sensing (RFGND) pin for monitoring)
• Integrated Forward / Reverse rotation switch circuit (Selected by F/R pin)
• Integrated Lock Protection circuit with auto-recovery
• Output Lock Protection signal (RD pin) / Output 1-hole FG signal (FG pin)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum Supply voltage
VCC max
VCC pin
18
V
Maximum VG voltage
VG max
VG pin
23
V
Maximum RD/FG pin voltage
VFG max
RD, FG pin
18
V
Maximum RD/FG pin current
IFG max
RD, FG pin
5
mA
Maximum Output pin voltage1
VO max1
UH, VH, WH pin
23
V
Maximum Output pin voltage2
VO max2
UL, VL, WL pin
6
V
Maximum Output pin current
IO max
UH, VH, WH, UL, VL, WL pin
30
mA
Maximum Input pin voltage
VL max
SOSC, LIM, VCTL, PWMOSC, CSDOSC
6
V
Maximum VREG pin current
IVREG max
VREG pin
5
mA
Allowable power dissipation2
Pd max
Mounted on a board. *1
Operating temperature
Topr
– 40 to 95
deg.
Storage temperature
Tstg
– 55 to 150
deg.
Junction temperature
Tj max
150
deg.
1.2
W
*1: Specified board: 76.1mm x 114.3mm x 1.6mm, glass epoxy board
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.
ORDERING INFORMATION
See detailed ordering and shipping information on page 13 of this data sheet.
Semiconductor Components Industries, LLC, 2013
July, 2013
72413NK 20130626-S00001 No.A2205-1/14
LV8850GA
Recommended Operating Conditions at Ta = 25°C
Parameter
Symbol
Operating voltage
VCC
VCC pin
Operating supply voltage
VCCOP
VCC pin *2
VG pin voltage range
VG
VG pin (VCC+7V) *3
Pin voltage range
Input PWM frequency range
typ
Unit
max
12
V
4
SOFTST, CTLSW, SYNSEL, F/R pin
IO
*4
min
SOSC, LIM, VCTL, PWMOSC, CSDOSC
VL
Output current range
Ratings
Conditions
UL, VL, WL, UH, VH, WH pin
f(PWM)
16
V
21
V
0
VREG
V
0
25
mA
20
60
kHz
*2: When the voltage of VCC is reduced, the speed might not be controllable properly depending on settings.
*3: For VG pin, be applied either VCC+7V or 21V, whichever is lower.
*4: Make sure to adjust it according to External-FETs and types of Motor and maximum rotation speed.
Electrical Characteristics at Ta = 25°C, VCC = 12V
Parameter
Supply current
Symbol
ICC
Conditions
DC input mode, PWM=100%
Ratings
Min
typ
Unit
max
7
10
13
mA
8
10
12
MHz
3.6
4.0
Internal oscillation circuit
Oscillation frequency
f(MOSC)
Constant voltage output (VREG pin) *5
Output voltage1
VVREG
Load fluctuation
ΔVREG
Io = -5 to 0 mA
4.2
V
100
mV
Charge pump output (VG pin) *6
Output voltage
VVG
Vcc+7
V
Output block
On-resister of Upper-Tr
in H-side
On-resister of Lower-Tr
in H-side
On-resister of Upper-Tr
in L-side
On-resister of Lower-Tr
in L-side
RONHH
Io=-10mA
25
40
Ω
RONHL
Io=10mA
40
60
Ω
RONLH
Io=-10mA
40
60
Ω
RONLL
Io=10mA
25
40
Ω
VCTL amplifier (VCTL pin) at DC input mode (CTLSW pin=High)
Input bias current
IB (CTL)
Gain
G (CTL)
–1
1
0.57
uA
V/V
0% duty input voltage
VIN1 (CTL)
3.0
3.2
3.4
V
Max duty input voltage
VIN2 (CTL)
1.35
1.55
1.75
V
VREG – 1
VREG
V
0
1
V
VREG – 1
VREG
V
0
1
V
During direct PWM input (VCTL pin) at PWM input mode (CTLSW pin=Low)
High level input voltage
VIH (PWM)
Out transistor ON
Low level input voltage
VIL (PWM)
Output transistor OFF
Input mode select pin (CTLSW pin)
High level input voltage
VIH(CTLSW)
DC input mode
Low level input voltage
VIL(CTLSW)
PWM input mode
Internal PWM oscillator (PWMOSC pin)
High level output voltage
VOH (PWM)
2.7
3.0
3.3
V
Low level output voltage
VOL (PWM)
1.75
2.0
2.25
V
Charge/ discharge current
I (PWM)
±30
±45
±60
uA
2.5V
Forward / Reverse switch (F/R pin) *7
High level input voltage
VIH (FR)
Energization: UOUT -> VOUT -> WOUT
VREG – 1
VREG
V
Low level input voltage
VIL (FR)
Energization: UOUT -> WOUT -> VOUT
0
1
V
Continue to the next page
No.A2205-2/14
LV8850GA
Continue from the former page
Parameter
Symbol
Conditions
Ratings
Min
typ
Unit
max
Synchronous rectification switch (SYNSEL pin) *11
High level input voltage
VIH (SYN)
Synchronous rectification control is disabled
VREG – 1
VREG
V
Low level input voltage
VIL (SYN)
Synchronous rectification control is enabled
0
1
V
0.3
V
600
Hz
0.23
V
V
FG, RD output (FG pin, RD pin) *8
Low level output voltage
Maximum FG frequency
*9
VFG
FG, RD pin. Io = 2mA
f (FG)
*10
VRF
RF = 0.2 ohm, limit current: 1.05A
Current limiter circuit (RF pin)
Limiter voltage
0.18
0.21
Lock protection (CSDOSC pin)
High level output input
VOH (CSD)
1.7
1.9
2.1
Low level output input
VOL (CSD)
0.25
0.40
0.55
V
Charge current
IC (CSD)
– 4.5
– 3.5
– 2.5
uA
Discharge current
ID (CSD)
0.25
0.35
0.45
Ratio of charge and discharge
RI (CSD)
8
10
12
uA
uA/uA
Internal Start-Up oscillator (SOSC pin)
High level output input
VOH (SOSC)
0.9
1.1
1.3
V
Low level output input
VOL (SOSC)
0.45
0.60
0.75
V
Charge/ discharge current
I (SOSC)
±3.5
±5
±6.5
uA
0.9
1.2
1.45
V
0.35
0.50
0.65
uA
SOFT start (SOFTS pin)
SOFT start cancel voltage
VIH(STS)
SOFTS charge current
I(STS)
Overheat protection circuit (thermal shutdown)
Operating temperature
TSDON
Design guarantee *10
160
deg.
Hysteresis temperature
ΔTSD
Design guarantee *10
20
deg.
*5: For VREG pin, it can be used for only internal and setting of this IC, not for power supply.
*6: For VG pin, be applied either VCC+7V or 21V, whichever is lower. And it can not be for power supply.
*7: Do not switch R/F pin during motor rotation. This may damage the IC and the motor.
*8: For FG, RD output pins, it is recommended to connect pull-up resistor between the pins and power supply of the controller.
*9: Be limited by External-FETs and types of Motor.
*10: Design guarantee: Signifies target value in design. These parameters are not tested in an independent IC.
*11: For heat reduction and higher efficiency, this IC uses synchronous rectification by setting the “SYSNSEL”-pin. However, it may increase supply voltage
under usage conditions:
* When output duty is reduced rapidly.
* PWM input frequency is low. And other.
The above behavior depends on inserting a diode for protection against reverse connection, a bypass capacitor value between power supply and GND
and FAN motor. Please confirm it enough. If the supply voltage shall increase, make sure that it does not exceed the maximum ratings with the following
measures:
*Select an optimal capacitor between power supply and GND.
*Insert a zener diode between power supply and GND.
No.A2205-3/14
LV8850GA
Package Dimensions
unit : mm (typ)
3253B
9.75
0.5
5.6
7.6
19
36
1
0.18
18
0.15
0.08
(1.0)
(0.63)
1.2max
(0.5)
TSSOP36(275mil)
2.5
Specified circuit board:
glass epoxy board
2.0
1.5
1.20
1.0
0.53
0.5
0
- 40
-20
0
20
40
60
80
100
No.A2205-4/14
3
7
COM
CIN
FIL
4
RD
5
6
TGND
TGND2
SOSC
36
VREG
500Ω
36
1
2
Pin name
500Ω
Pin No.
9
VCTL
VG
1
1kΩ
VG
17
18
CPC1
CPC2
16
15
VCC
CP1
14
13
12
VREG
SGND
SOFTST
11
8
LIM
CDSOSC
7
SOSC
10
6
TGND2
PWMOSC
5
TGND
3
FG
4
2
FIL
RD
1
CIN
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
CP2
VG
CTLSW
SYNSEL
F/R
RFGND
RF
PGND
WL
WH
VL
VH
UL
UH
WOUT
VOUT
UOUT
COM
LV8850GA
Pin Assignment
Equivalent Circuit
Equivalent Circuit
2
VG
1kΩ
6kΩ
3
FG
25Ω
4
VREG
25Ω
7
Continue to the next page
No.A2205-5/14
LV8850GA
Continue from the former page
Pin No.
Equivalent Circuit
Pin name
9
VREG
8
LIM
VCTL
500Ω
8
9
500Ω
1kΩ
10
VREG
10
200Ω
PWMOSC
11
VREG
11
200Ω
500Ω
CSDOSC
VREG
12
SOFTST
13
SGND
12
500Ω
VCC
25Ω
14
VREG
54k Ω
14
100Ω
26kΩ
15
VCC
Continue to the next page
No.A2205-6/14
LV8850GA
Continue from the former page
Pin No.
Equivalent Circuit
Pin name
16
16
17
18
19
20
CP1
CPC1
CPC2
CP2
VG
17
18
19
20
VREG
VCC
SGND
VREG
21
22
23
100kΩ
21
CTLSW
SYNSEL
F/R
22
1kΩ
23
VREG
VCC
24
25
RFGND
RF
10kΩ
5kΩ
24
25
26
PGND
VREG
27
29
31
27
WL
VL
UL
25Ω
29
51kΩ
31
VG
28
30
32
28
WH
VH
UH
25Ω
15Ω
30
51kΩ
32
VG
6kΩ
33
33
34
35
WOUT
VOUT
UOUT
6kΩ
34
35
6kΩ
No.A2205-7/14
LV8850GA
Pin Functions
Pin No.
Pin name
1
CIN
2
FIL
3
FG
4
RD
5
6
TGND
TGND2
7
SOSC
8
LIM
9
VCTL
10
PWMOSC
11
CSDOSC
12
SOFTST
13
SGND
14
VREG
15
VCC
16
CP1
17
CPC1
18
CPC2
19
CP2
20
VG
21
CTLSW
22
SYNSEL
23
F/R
Function
Filter pin for motor position detection comparator.
Make sure to connect a capacitor between FIL (PIN2) and CIN.
Filter pin for motor position detection comparator.
Make sure to connect a capacitor between CIN (PIN1) and FIL.
FG pulse output. Outputs pulse equivalent to 1 hole. Synchronizes with U-phase.
Motor lock detection output.
Outputs high level voltage when the motor is locked. Auto-recovery lock protection
circuit.
Test pin.
Connect to SGND.
Setting pin for motor startup frequency. Make sure to connect a capacitor between SOSC
and GND. Adjusts startup frequency according to charge/discharge current and the
capacitor.
Voltage input for setting the lowest speed during DC control signal input mode.
By dividing the regulator voltage with resistance and inputting the voltage (1 < LIM <
3V), you can set the lowest speed for the motor.
Motor control voltage input.
VCTL functions as DC control signal input pin and PWM control input signal input pin.
CTLSW (PIN21) switches between DC input and PWM input.
Reference frequency setting for PWM switching.
Make sure to connect a capacitor between PWMOSC and GND. You can set a carrier
frequency for PWM switching during DC control signal input mode by adjusting the
capacitor.
Setting pin for motor lock detection time. Make sure to connect a capacitor between
CSDOSC and GND. You can set time to start lock protection operation by adjusting the
capacitor.
Setting pin for soft start time. By connecting a capacitor between SOFTS and GND, you
can start up the motor smoothly.
GND for the IC.
Regulator voltage output (4V).
Make sure to connect a capacitor between VREG and GND.
You cannot supply power outside the IC.
Supply for the IC. Make sure to connect a capacitor between VCC and GND.
Charge pump: pulse output for the 1st stage booster. Make sure to connect a capacitor
between CP1 and CPC1 (17PIN).
Charge pump: a pin for the 1st stage booster. Make sure to connect a capacitor between
CPC1 and CP1 (PIN16).
Charge pump: a pin for the 2nd stage booster. Make sure to connect a capacitor between
CPC2 and CP2 (PIN19).
Charge pump: pulse output for the 2nd stage booster. Make sure to connect a capacitor
between CP2 and CPC2 (PIN18).
Charge pump: output for booster voltage.
Make sure to connect a capacitor between VG and GND.
Switching pin for control input signal. CTLSW= “High”: DC control signal input mode
CTLSW=”Low”, PWM control signal input mode
Configuration should be performed according to control method.
Switching pin for synchronous rectification operation.
SYNSEL=”High”: Stop
SYNSEL=”Low”: Enable
Switching pin for motor rotation direction. The order of energization to the motor is as
follows:
"High" input: U→V→W
"Low" input: U→W→V By changing the order, rotation direction is switched. Do not
switch operation while the motor is driving.
Continue to the next page
No.A2205-8/14
LV8850GA
Continue from the former page
Pin No.
Pin name
24
RFGND
25
RF
26
27
29
31
28
30
32
33
34
35
36
PGND
WL
VL
UL
WH
VH
UH
WOUT
VOUT
UOUT
COM
Function
GND for RF sensing for drive current detection. By connecting RFGND to RF (PIN25),
drive current is detected with high precision.
RF sensing for drive current detection. By connecting RF to RFGND, drive current is
detected.
GND for the IC.
Low-side pre-driver outputs.
Make sure to connect Nch-Tr gate for motor drive to each pin. They outputs drive signal
for the sink.
High-side pre-driver outputs.
Make sure to connect Nch-Tr gate for motor drive to each pin. They outputs drive signal
for the source.
Detection pin for motor back EMF voltage. Make sure to connect them to each phase of
U,V,W of the motor.
Connection pin for motor midpoint.
No.A2205-9/14
LV8850GA
Block Diagram
CIN
1
COM
36
FIL
2
UOUT
35
FG
3
VOUT
34
RD
4
WOUT
33
TGND
5
RD
Waveform Synthesis
FG
TGND2
6
SOSC
7
UL
31
VH
30
START
OSC
Main
OSC
LIM
8
VCTL
9
PWMOSC
10
CDSOSC
11
SOFTST
12
CTLSW
PWM input
DC input
Selector
PWM
OSC
CSD
OSC
VCC
15
CP1
16
SENSORLES
S
LOGIC
PRE
DRIVER
VL
29
WH
28
WL
27
PGND
26
TSD
RF
25
Soft
Start
RFGND
24
SGND
13
VREG
14
UH
32
VREG
F/R
23
CHARGE
PUMP
SYNSEL
22
CTLSW
21
CPC1
17
VG
20
CPC2
18
CP2
19
No.A2205-10/14
LV8850GA
Application Circuit Example
* Each fixed number in the following FIG. is the referential value. Make sure to adjust it according to External-FETs and
types of Motor.
C1
CIN
1
COM
36
FIL
2
UOUT
35
*12
FG
3
VOUT
34
*14
*12
RD
4
WOUT
33
*14
TGND
5
UH
32
*14
TGND2
6
UL
31
SOSC
7
VH
30
LIM
8
VL
29
*4
*11
R2
*11
R1
*8
C3
R8
R7
D2
VCTL
*12
9
R5
PWMOSC
*16
10
C2
CDSOSC
*7
11
C4
SOFTST
*6
12
C5
SGND
13
C8
VREG
*10
14
*17
C9
*3
C10
D1 *17
*9
C7
*2
R10
C21
C15
R11
C16
C13
R12
WH
28
*18
C22
C17
R13
C18
WL
27
PGND
26
R14
RF
25
C19
C23
RFGND
24
R15
F/R
23
VCC
15
SYNSEL
22
CP1
16
CTLSW
21
CPC1
17
VG
20
CPC2
18
CP2
19
C20
FET
R9
R16
C14
*5
*1C
C11
*9
C6
*9
C12
*1E
*1A
*1B
C1
C2
C3
C4
C5
C6
C7
C12
C8
C9
C10
C11
R1
R2
R3
R4
R5
R7
R8
1000pF
470pF
1000pF
2.2uF
2.2uF
0.15uF
0.15uF
0.47uF
0.47uF
10uF
0.1uF
47uF
100 Ω
100 Ω
100k Ω
100k Ω
100 Ω
100k Ω
100k Ω
D1
D2
DSE010
DSP10
*1D
B-EMF detection filter
PWM oscillator
Start-Up oscillator
Lock-detection time
Soft Start time
Charge pump
Charge pump
Charge pump
VREG
VREG
VCC
VCC
RD
FG
RD
FG
Input signal
LIM
LIM
C14
C15
C16
C17
C18
C19
C20
C21
C22
C23
C13
470pF
220pF
220pF
220pF
220pF
220pF
220pF
0.1uF
0.1uF
0.1uF
33uF
R9
R10
R11
R12
R13
R14
R15
R16
FET
510 Ω
330 Ω
510 Ω
330 Ω
510 Ω
330 Ω
510 Ω
0.2 Ω
NTMD5836
RF filter
FET
FET
FET
FET
FET
FET
FET
FET
FET
VM
RF filter
FET, gate resistor
FET, gate resistor
FET, gate resistor
FET, gate resistor
FET, gate resistor
FET, gate resistor
RF resistor
Nch / Nch
A value of these circuit fixed number is one example. Make sure to adjust it according to External-FETs and types of
Motor.
No.A2205-11/14
LV8850GA
*1A, *1B, *1C, *1D, *1E .<GND line>
GND is classified as follows: SGND, PGND RFGND and MGND.
SGND (*1A) : Small-signal (VREG4, TGND, TGND2, PWMOSC, SYNSEL, CTLSW, SGND, VCTL,
LIM, SOFTS, F/R, CSDOSC, SOSC)
MGND (*1B) : Middle-signal (PGND)
PGND (*1D) : Power-signal (GND-side of RF-resistor, GND-side of bypass-capacitor for a Motor)
RFGND (*1C) : Sensing-signal (RFGND)
When design a PCB layout, SGND(*1A), MGND(*1B) and PGND(*1D) should be connected at a single GND with a
capacitor (power supply stabilizer capacitor(*1E)) between VCC and GND.
Power supply and GND should be connected as wide and short as possible. RFGND should be connected near the
resistance which should be lined separately from the other GND line.
*2.<Power supply stabilizer capacitor for power stabilization>
Power supply stabilization capacitor(C11) should be 10uF or higher.
*3.<Noise rejection capacitor>
Noise rejection capacitor(C10) should be connected as short as possible.
*4.<CIN, FIL pin>
Connection pin for filter capacitor. LV8850 detects rotor position using back-EMF (electromotive force) which is
generated during rotation of the motor. Based on the information, energization timing for output pins are defined.
Problems in startup due to noise can be improved by connecting a filter capacitor (C1) between CIN and FIL.
If the capacitance is too high, energization timing of the output during high-speed rotation is delayed and efficiency is
degraded. Make sure to connect capacitor between COMIN and FIL as short as possible to reject noise.
*5.<RF pin>
Setting pin for current limiter. When pin voltage is higher than 0.21V, current is limited and recirculation mode is set. In
the example of application circuit, current limiter is set at 1A. RF resistance (R16) is calculated as follows:
RF resistance = 0.21V/ desired current limit value.
If detection precision of current limit is low due to noise, make sure to insert a filter (R9, C14) between RF and RFGND.
*6.<SOFTST pin>
Setting pin for soft start. Motor rotation count increases gradually by connecting a capacitor (C5) between SOFTST pin
and SGND. The period of Soft-Start is calculated approximately as follows:
Period of Soft-Start ≈ Capacitor value / 380 × 10-9
ex) In the case of Capacitor value = 2.2uF,
Then Period of Soft-Start ≈ 5.8s
*7.<CSDOSC pin>
Capacitor connection pin for lock detection. It integrates constant current charger, constant current discharger circuit.
Lock protection time can be modified by connecting capacitor (C4) between CSDOSC and SGND. When it isn’t used,
then make sure to connect to SGND. The Period of Start-Up and Lock is calculated approximately as follows:
Period of Start-Up ≈ Capacitor value * 0.43 × 106
Period of Lock ≈ Capacitor value * 4.29 × 106
ex) In the case of Capacitor value = 2.2uF,
Then Period of Start-Up ≈ 0.9s
Period of Lock ≈ 9.4s
*8.<SOSC pin>
Capacitor connection pin for setting startup frequency. Make sure to connect a capacitor (C3) between SOSC and SGND.
The capacitor is required for SOSC pin to define frequency to start up motor.
Also make sure to confirm constant when you change motors or circuit specification because optimum value changes
according to startup condition. The Frequency of SOSC is calculated approximately as follows:
Frequency of SOSC ≈ 5 × 10-6 / Capacitor value
ex) In the case of Capacitor value = 1000pF,
Then Frequency of SOSC ≈ 5kHz
No.A2205-12/14
LV8850GA
*9<VG,CP1,CPC1,CP2,CPC2 pin>
Capacitor connection pin for pre-drive voltage generation and pre-drive power supply stabilizer. Make sure to connect
capacitor to the pins because they generate voltage to drive upper output DMOS transistor. The layout should be as wide
and short as possible.
*10.<VREG pin>
Power supply pin for the internal control block. Regulator output pin to generate power supply for the control circuit.
Make sure to connect capacitor (C8, C9) between VREG and SGND to stabilize operation of the control block. Make sure
to connect the capacitor with greater capacitance than the one connected to the charge pump because it is used for power
supply to the control block and to generate charge pump voltage.
*11.<FG/RD pin>
Since FG, RD output are open-drain, it is recommended to connect pull-up resistance between FG and RD and the power
supply for the controller.
*12.<Noise rejection resistor>
Make sure to implement resistance (R1, R2, R5) for protection because the line is easily influenced by noise.
*14.<UOUT,VOUT,WOUT,COM pin>
Back EMF detection pins. Make sure to line the pins as short as possible without crossing with the other lines.
*15.<VCTL pin>
Make sure not to open.
*16.<PWMOSC pin>
Capacitor connection pin for setting PWM frequency. When it is the “DC control signal input mode”, make sure to
connect a capacitor (C2) between PWMOSC and SGND as short as possible. When it is the “PWM control signal input
mode”, make sure to be open.
Also make sure to confirm constant when you change motors or circuit specification because optimum value changes
according to motor rotation speed. The Frequency of PWM is calculated approximately as follows:
Frequency of PWM ≈ 23 × 10-6 / Capacitor value
ex) In the case of Capacitor value = 470pF,
Then Frequency of PWM ≈ 49kHz
*17.<Separation of power supply>
Make sure to insert a diode to prevent the inverted-current from a motor.
*18.<Protection of VM (power supply for a motor)>
When the motor power supply voltage (VM) abnormally rises by environment to use, please insert a Zener diode between
a motor power supply and motor GND.
ORDERING INFORMATION
Device
LV8850GA-AH
Package
TSSOP36 (275mil)
(Pb-Free / Halogen Free)
Shipping (Qty / Packing)
1000 / Tape & Reel
No.A2205-13/14
LV8850GA
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PS No.A2205-14/14
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