L9909 Fast Delivery |IC PHOENIX CO.,LIMITED

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L9909
DC MOTOR DRIVER WITH POSITION CONTROL
DESCRIPTION
Oscillator.
The output currentat ROSC pinis mirroredto
COSC pin witha proper direction accordingtoits
voltage slope.
The triangular wave format COSC pin, being
compared witha threshold, defines the PWM duty
cycleat the motor driver output M+ and M-.
The oscillator also supplies the time base for the
switchoff and switchon delays and the Time Out
Counter.
The typicaloscillator periodis:
Tosc= 7.04x Roscx Cosc
February 2001
150KΩ
150KΩ
OP1
COMP1+ 1
375K 2
VR3=6.6%Vcc
COMP7
switchon
DELAY
VR7=
7.5%Vcc
switchoff
DELAY
35V
35V
VR3=
6.6%Vcc
VR2=
56.6%Vcc
COMP2
COMP3
curr.
sense
OSCILLATOR
OP8
VR8=
14.2%Vcc
COMP4
pwm
DELAY
VR4=1.5V
COUNTER
Tck
RES
TIMEOUT
Vcc
Tck
Tck
Tck
Vcc
Tck
Vcc
ROSC GND
VR2=56.6%Vcc
VR3=6.6%Vcc TEMP.
SENSE
Currentratio=1:2
VR5= 6.6%Vcc 5Verr|
curr.
limit
curr.
limit
Vcc
Vcc
Vcc
16V VR2=
56.6%Vcc
VR3=
6.6%Vcc
Td_on
Td_pwm
Td_off
10V
open
over
temp.
VOLT.
SENSE
overvolt.
overvolt.
DELAY1
Td_ov_1
(130μs)
Vcc
open
START
LATCHLatch
STOP
STOP
START
DIRECTION
PWM
DRIVER
CONTROL
OFF
OFF
overvolt.
DELAY2
Td_ov_2
(1ms)
curr.
limit
curr.
limit
BLOCK DIAGRAM
MInidip
ORDERING NUMBER: L9909
L9909 MOTOR DRIVER WITH POSITION CONTROL
1/9
ABSOLUTEMAXIMUM RATINGS
Symbol Parameter Value Unit
VCC DC battery supply voltage -0.3to55 V
VCC_t Transient battery supply voltage (Figs.4 and5) -0.3to VCC_CL(*) V
Vin Voltageat VCOM and VFB pins -0.3to VCC +0.3 V
VROSC VoltageAT ROSCpin -0.3to7 V
VCOSC Voltageat COSCpinfor VCC >16V -0.3 to16 V
Voltageat COSCpinfor VCC >16V -0.3to VCC +0.3 V
ICC Currentat VCC GND, M+ andM- ±1.9 A
ICC_t Transient Currentat VCC GND (figs.4 and5) ±4A
Isig Currentat VFB, VCOM, COSC and ROSC ±10 mA Device Power Dissipation internally limited W Junction Temperature -40to 150 °C
Tstg Storage and Junction Temperature -55to 150 °C
VESD ESD Voltage Level (Human body Model- MIL STD883C) ±2000 V
(*) NOTE: SELFPROTECTING
Stressedabove those listed under”Absolute Maximum Ratings” may cause permanent damagetothe device. Thisis astress rating anlyand
functional operationofthe deviceatany conditionabovethose indicatedinthe operational section ofthisspecificationisnot implied.Exposure
toabsolute maximumrating conditionsfor extended periods may affectdevice reliability.
THERMAL DATA
Symbol Parameter Value Unit
Rth j-case Thermal resistance Junctionto case (pin1) 70 °C/W
GND
COSC
VFB
VCOM
4M-
VCC
ROSC8
D99AT436
PIN CONNECTION
L9909
2/9
ELECTRICAL CHARACTERISTICS (VCC=7 to18V;Tj= -40to 85°C, unless otherwise specified.)
Pin Symbol Parameter Test Condition Min. Typ. Max. Unit
POWER SUPPLY
VCC ICC Quiescent Supply Current IM+ =IM- =0, IROSC= 100μA;
VCOSC =0 mA
VCC_OV Over Voltage Shut Down 18 20 V
VCC_OVdel Over Voltage Shut Down Delay 130 μs
VCC_min Minimum VCC Operating
Voltage- Other Parameter
maynotbein spec
5.5 V
VCC_CL Battery Supply Clamp Voltage Transientsof Fig.5 70 80 V
Td_ov_1 Battery Supply Clamp Time Transientsof Fig.5 130 1000 μs
Td_ov_2 Battery Supply Clamp Time Transientsof Fig.4 1 ms
OSCILLATOR
COSC
ROSC
ROSC Oscillator Resistor 10 100 KΩ
COSC Oscillator Capacitor 2 100 nF
TOUT Timer Run Time 16384 TOSC
FOSC Oscillator Frequency ROSC 27KΩ;COSC= 10nF 430 530 630 Hz
ROSC Vrosc Voltageat ROSCpin ROSC 27KΩ 14.2 %VCC
COSC ICOSC Currentat COSCpin ROSC 27KΩ -20 IROSC 20 %
VTHCOSC High Threshold Voltage 56.6 1000 %VCC
VTLCOSC Low Threshold Voltage 6.6 1000 %VCC
VLINERR Voltage Ramp Linearity Error -20 20 %
PIN FUNCTIONS Name Function GND Ground COSC Oscillator Capacitor VFB Position Feedback Voltage VCOM Position Command Voltage M- Negative Motor Terminal VCC Power Supply ROSC Oscillator Resistor M+ Positive Motor Terminal
L9909
3/9
ELECTRICAL CHARACTERISTICS (continued.)
Pin Symbol Parameter Test Condition Min. Typ. Max. Unit
INPUT OUTPUT TRANSER FUNCTION
VCOM
VFB
COSC Input Output Gain 7 10 14
VSTP Stop Motor Voltage VSTP =2 VR4 2.5 3 3.5 V
VSTR Start Error Voltage VSTR =VR7/5 1 1.5 2 %VCC
Voff_c1 Comp1 Input Offset Voltage Error Voltage whenthe motor
starts braking
-20 20 mV
Ton Switchon Delay 1 2 TOSC
Toff Switchoff Delay 1 2 TOSC
VCOM
VFB
Rdiff Differential Input Impedance
(seefig3) 2VCOM− VFB
Icom−IFB
100 300 KΩ
Rcom Common Mode Input (seefig3) VCOM+ VFB
Icom+IFB KΩ
OUTPUT DRIVERS
RON_H High Side RDS IM+ =IM-= 0.3A; VCC =13.5V 0.6 1.5 Ω
IM+ =IM-= 0.3A; VCC =7V 1 2.6 Ω
RON_L Low Side RDS IM+ =IM-= 0.3A; VCC =13.5V 0.6 1.5 Ω
IM+ =IM-= 0.3A; VCC =7V 1 2.6 Ω
ILIM Output Current Limitfor each4 Output Transistors
Separately 1.9 A Output Rise Time 20%to 80% 20 μs Output Fall Time 80% to20% 20 μs
VMTRAN |V(M+)- V(M-)| Output Voltage
During VCC Transients
Transientsof figs.4 and5 20 V
THSHDN ThermalShutdown 170 °C
VOUT
Vcc
Vcc
ΔVOUT
ΔVerr =10
-Vcc
-Vcc
VSTR=
1.5%Vcc
VSTP
Vcc-VSTP Verr
-VSTP
VSTR=
-1.5%VccVcc-VSTP
Figure1. Static Transfer Characteristic.Error
Voltagevs. Output Voltage
VOUT
Vcc
ΔVOUT
ΔVerr =10
-Vcc
Perr[%]
-VSTP
VSTP (1+-------)VSTP
Vcc
-10(1+ -------)VSTP
Vcc
Figure2. Static TransferCharacteristic. Position
Error Voltagevs. Output Voltage
Perr= Verr/VCC
L9909
4/9
Position Feedback. shownin Figs.3 and6,a positive error voltage
VERR= VCOM- VFBK drives the motor witha
positive M+ voltage with respectto M-.A correct
negative electro-mechanical feedbackis estab-
lished when the motor, supplied witha positive voltage with respectto M-, drives the feed-
back potentiometerwiperto Vcc.
Rest Zone.
When the differentialinput voltage VERR crosses
the zero Volts threshold,as detectedby the preci-
sion comparator COMP1, the motoris brakedby
drivingit witha zero Volts voltage. longas VERRis kept inside the Rest Zone,
ranging from -VSTRto +VSTR (see Figs.1 and
2), no electrical stimulusis appliedto the motor
terminals. Whenin the Rest Zone M+ and M- are
both drivento Vcc.
Running Zone.
When the input error voltage VERR goes outof
the Rest Zone (see Figs.1 and 2) the motor
starts and the wiper voltage VFBof the feedback
potentiometer movesin the directionof the input
voltage VCOM, bringing the VERR voltage back zero.
When VERR becomes lower than (Vcc-VSTP)/10, proportional control activates. The motor volt-
ageat M+ and M- lowers witha rate factorof 10
times VERR. This motor voltageis generated, ac-
cordingto the motor direction,by connectingto
Vcc one motor terminal andby switching the op-
posite one witha PWM control.
When approaching the target position, at
VERR=0, the motor jumps into the Rest Zone
froma residual VSTP supply voltage. This control suitable for motors that still run with the min.
VSTP=2.5V residual supply voltagein all condi-
tions, ensuring that the rest positionis finally
reached. But at the same time the max.
VSTP=3.5V should not make any motor run too
fast and stop far away from the set pointfor me-
chanical inertia,or even get outof the rest zone
possibly starting oscillations.
Time Out Counter.
The Time Outis performedbya 14 Bit Counter
that counts 16384 Tosc periods. When the input
error voltage VERR goes outof the Rest Zone the
motor and the counter start. The motor stopsat
the VERR zero crossingor when the Counter
times out, whichevercomes first.
Direction Control.
The motor can be drivenin both direction and
stoppedby the timeras shownin Fig.7.
The bias voltageat VFB input sets the threshold
voltage for the direction control input pin (DIR).
VFB and VCOM inputs maybe swapped causing
the motorto reverse directions.+ M+
VFB
VCOM
U709
Vcc
GND
Vcc
VERR VOUT
ICOM
IFB
Figure3. L9909 Simplified Application Diagram =60V
Source resistance=0.5Ω
1mst1=10s
Time
Vcc
10%
90%
Figure4. Load Dump Transient= 100V
Source resistance =10Ω=1μs =200μsto 500μs= 200msto 500ms
Time
Vcc
10%
90%
Figure5. Inductive Switching Transient- Positive
L9909
5/9
Over Current Protection.
The driver output pins (M+ and M-) are over cur-
rent protectedby4 separate linear current limit-
ers, one for eachof the4 power output transis-
tors. The output drivers resume normal operation soonas the over currentis removed.
Motor Over Voltage Protection.
The motoris over voltage protectedby switching
off (to Hi-Z) the M+ and M- output drivers, when
Vcc rises above the 19V typ. over voltage shut
down threshold.
Over Temperature Protection.
The chipis over temperature protectedby switch-
ingoff(to Hi-Z) the M+ and M- output drivers.
Power Supply Transient Protections.
The device provides over voltage suppressionfor
fast Vcc voltage transients (Fig. 5). The Vccis
clampedat typ. 70V by turningonall four, bridge
connected, power output transistors. They are
roughly subjectedto equal currents and voltages
for even transientenergy distribution.
The over voltage suppressionis deactivated for
slow Vcc voltage transients (Fig.4)by raising the
Vcc voltage clampat typ. 80V.+
OSCILLATOR
U709
Rosc
27KΩ
Cosc
10nF
1nF
1nF
GNDCOSCROSC
VCOM
VFB
1KΩ
1KΩ
EMI
Protection
Network
100nF
MOTOR
COMMANDPOTENTIOMETER
VCC
ReverseBattery
Protection Diode
GROUND
POWER
FEEDBACK
POTENTIOMETER
100nF 1nF
ERR
Figure6. Recommended Application Diagramfor Positive Control+
OSCILLATOR
U709
Rosc
27KΩ
Cosc
10nF
1nF
1nF
GNDCOSCROSC
VCOM
VFB
10KΩ
20KΩ
EMI
Protection
Capacitors
100nF
MOTOR
VCC
Reverse Battery
Protection Diode
GROUND
POWER
100nF 1nF
DIR
20KΩ
Protection
Resistor
DIR
Threshold
Voltage
Figure7. Recommended Application Diagramfor Direction Control
L9909
6/9

Partno	Mfg	Dc	Qty	Available	Descript
L9909	STM	N/a	450	avai	DC MOTOR DRIVER WITH POSITION CONTROL
L9909	ST	N/a	400	avai	DC MOTOR DRIVER WITH POSITION CONTROL