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AD6392 4-CH MOTOR DRIVE IC
DESCRIPTIONS
AD6392 is a 4-CH BTL driver suitable for driving motors and actuators in CD-P/VCD-P systems. Each channel drivers except the spindle driver have an internal primary filter and they can be directly connected to the servo's PWM output without any attached external components.
28SSOPH-375B
FEATURES
- 3-CH BTL driver compatible with PWM input (PWM input is filtered by an internal primary filter, so there is no need to attach external components) - 1-CH BTL spindle driver with analog input - Built-in TSD (thermal shut down) circuit. - Built-in mute circuit. - Operating supply voltage (4.5V~13.2V).
ORDER INFORMATION
Device AD6392 AD6392 Package 28SSOPH-375A 28SSOPH-375B Operating Temp -35OC ~ +85OC -35OC ~ +85OC
BLOCK DIAGRAM
PGND DO4F DO4R VBINA VSIN VBIN VCC2 PGND VCC1 IN3F IN3R RCIN3 DO3R DO3F MUTE
28
27
26
25
150K
24
23
22
21
20
19
18
17
16
15
FWD
100K
BIAS
INTERFACE
190K
LEVEL SHIFT
MUTE
TSD
INTERFACE FWD REV
INTERFACE FWD
6
REFI
1
DO1F
2
DO1R
3
RCIN1
4
IN1R
5
IN1F
7
REFO PGND
8
SGND
9
IN2F
REV
10
IN2R
REV
11
RCIN2
12
DO2R
13
DO2F
14
PGND1
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AD6392 4-CH MOTOR DRIVE IC
PIN CONNECTIONS
AD6392
PIN DESCRIPTIONS
NO 1 2 3 4 5 6 7 8 9 10 11 12 13 14 SYMBOL DO1F DO1R RCIN1 IN1R IN1F REFI REFO SGND IN2F IN2R RCIN2 DO2R DO2F PGND1 I/O O O I I I I O I I I O O DESCRIPTION CH1 forward output CH1 reverse output CH1 external capacitor / resistor CH1 reverse input CH1 forward input Reference input Reference output Signal ground CH2 forward input CH2 reverse input CH2 external capacitor / resistor CH2 reverse output CH2 forward output Power ground 1 25 26 27 28 VBINA DO4R DO4F PGND2 I O O NO 15 16 17 18 19 20 21 22 23 24 SYMBOL MUTE DO3F DO3R RCIN3 IN3R IN3F VCC1 VCC2 VBIN VSIN I/O I O O I I I I I DESCRIPTION Mute CH3 forward output CH3 reverse output CH3 external capacitor / resistor CH3 reverse input CH3 forward input Power supple voltage 1 Power supple voltage 2 CH4 bias input CH4 input CH4 bias input (with internal resistor) CH4 reverse output CH4 forward output Power ground 2
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AD6392 4-CH MOTOR DRIVE IC
ABSOLUTE MAXIMUM RATINGS
CHARACTERISTICS Maximum supply voltage Power dissipation 1 (375A_Type) Power dissipation 2 (375B_Type) Operating temperature Storage temperature SYMBOL VCCmax Pd 1 Pd 2 Topr Tstg VALUE 18 1.7 * 2.3 * -35 ~ +85 -55 ~ 150 UNIT V W W
O
C C
O
Note> 1. When mounted on 100mm X 100mm X 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6 mW/OC(375A_Type), 18.4 mW/OC(375B_Type), for using above Ta=25OC 3. Do not exceed Pd and SOA.
POWER DISSIPATION CURVE
3
375B_Type
Power Dissipation (W)
2 1
375A_Type
0
25
50
75
100
125
150
175
Ambient Temperature (C)
RECOMMENDED OPERATING CONDITIONS
CHARACTERISTICS Operating Supply Voltage SYMBOL VCC1,2 VALUE 4.5~ 13.2 UNIT V
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS
(VCC1=VCC2=8V, f = 1kHz, RL = 8ohm, Ta = 25OC unless otherwise specified.) CHARACTERISTICS Quiescent Circuit Current PREFO Pin Voltage PREFO Pin Voltage Variance All Mute On Voltage All Mute Off Voltage Mute On Voltage Mute Off Voltage Mute on current [ DRIVE PART (CH1,CH2,CH3) ] Input High Level Voltage Input Low Level Voltage Input High Level Current Input Low Level Current Output Offset Voltage 1,2,3 Output High Level Voltage Output Low Level Voltage Constant Current Internal integral Capacitance Current Pulse rise time 1 Current Pulse fall time 2 Current Pulse time differential Drive Linearity Ripple Rejection Vih Vil lih lil Voo Vohd Vold Iconst C tr tf tr-f LIN RR At startup At shutdown Vin = Vref0.5, 1, 1.5V*1 Vin = 100mVrms, 100Hz Vin = 5V Vin = 5V FWD = 5V, REV = 0V FWD = 0V, REV = 5V 2.4 50 -40 5.2 14 -160 90 100 0 5.8 1.1 22 24 0.08 0.55 100 70 0.5 150 +40 1.6 30 1 1 160 110 V V uA uA mV V V uA pF us us us % dB SYMBOL Icc Vbias Vbias Vamon Vamoff Vmon Vmoff Imute CONDITIONS No Load 1mA Source, sink Pin6=variation Pin6=variation Pin15=variation Pin15=variation MIN 3.40 -30 2.0 2.0 TYP 6.5 3.70 MAX 4.00 30 0.5 0.5 3 UNIT mA V mV V V V V mA
*1. If Vo = Vo1 when Vin = Vref0.5V, Vo = Vo2 when Vin = Vref1.0V, and Vo = V3 when Vin = Vref1.5V, then Lin = (Vo3/Vo2)(Vo2/Vo1)X100% April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS
(VCC1=VCC2=8V, f = 1kHz, RL = 8ohm, Ta = 25OC unless otherwise specified.) [ DRIVE PART (CH4) ] Input Bias Current Common mode input range Maximum Output Voltage High Maximum Output Voltage Low Voltage Gain Output offset voltage 4 Slew Rate Ripple Rejection Ratio lb Vicm Vohs Vols Gvc Voos SR RRs Vin = 100mVrms, 100Hz 1.6 5.2 8 -60 5.8 1.1 10.5 0 2 70 300 6.4 1.6 13 60 nA V V V dB mV V/us dB
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AD6392 4-CH MOTOR DRIVE IC
APPLICATION SUMMARY
- Mute function through power reference or signal reference pins Muting all channel drivers can be obtained through power reference or signal reference pins. Fig.1 shows the simplified schematic diagram for power/signal reference mute.
Fig. 1 Power reference, Signal reference & all mute function
Pin6, Pin23, Pin25 Above 1.0V Below 1.0V
Mute off on
As it can be seen in Fig. 1, pin6, pin23 and pin25 are connected to the positive input terminals of comparators, and the internal 1.0V reference is connected to the negative input terminals. Thus, if the voltage applied to each pins falls below 1.0V, Q1 and Q2 become on and hence the bias currents for all channel drivers become to be shut down. Thus all mute function can be carried out.
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
APPLICATION SUMMARY (Continued)
- Mute function through MUTE pin Mute function is also performed at MUTE pin (pin15). The logic is as followers:
Pin15 High Low
Mute off on
As it can be seen in Fig. 2, If the voltage of the pin15 become low (below 0.5V) or open, Q3 becomes off and Q4 on, and hence the bias currents for all channel drivers are shut down and muted. If the voltage of the pin15 become high (above 2.0V), the channel drivers operate normally.
Fig. 2 Mute function
- Thermal shutdown (TSD) The AD6392 has a thermal protection against the abnormal high temperature operation to protect the chip.
Temperature Above 175 OC Falls below 150 OC Hysteresis
mute on off 25 OC
Fig. 3 Thermal shut down
Q5 is biased through the resistor string from the internal bandgap reference voltage so that it remains in off state at the ranges of the normal operating temperatures. If the junction temperature rises above 175OC, Q5 turns into on state and hence Q7 turns on, and all channel drivers are muted as the bias currents are shut down. When the junction temperature falls below 150 O C, Q5 and Q7 are turned off and the drivers operate normally. The hysteresis temperature is, thus, 25 OC
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
APPLICATION SUMMARY (Continued)
- CH1,CH2 and CH3 Drive Parts (Focus, Tracking , Sled Drivers) CH1, CH2 and CH3 drive parts are composed of internal filter, V-I converter and output power amplifiers.
Internal filter
V-I converter Output Power AMP Fig. 4 CH1, CH2 and CH3 drive parts
- Internal primary filter Internal primary filter is composed of sourcing/sinking current source of 22uA and forward/reverse controlled switches. It converts "FWD/REV" digital signals to analog signal as shown in Fig. 5.
Fig. 5 Output signal waveforms of the primary filter
- V-I converter V-I converter converts filtered analog voltage signal to positive or negative steering current signals and delivers them to output power amplifiers. - Output power amplifier Output power amplifiers with a unity feedback configuration re-convert the current outputs of V-I converters to differential output voltage to drive motors in BTL mode.
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AD6392 4-CH MOTOR DRIVE IC
APPLICATION SUMMARY (Continued)
Input waveform (digital servo output). (Pin4,5,9,10,19,20)
Output waveform at internal filter(RCIN). (Pin3,11,18)
Final output waveform. (Pin1,2,12,13,26,27)
Fig. 6 Operation waveforms of CH1, CH2 and CH3 drive parts
- Operation principle If FWD is high and REV is low, then SW_FWD and SW_REV become on and off, respectively. This causes the internal capacitor to be charged with sourcing current of 22 uA and consequently the voltage of the filter output (RCIN) increases with the internal time constant of 2.4usec (time constant = R*C=24 pF * 100 Kohm =2.4usec). Then the output current of V-I converter is given by
di=
VRCIN 100 K
The output voltages of power amplifiers are, then, given as:
DOF = Pref + RCIN
DOR = Pref - RCIN
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AD6392 4-CH MOTOR DRIVE IC
APPLICATION SUMMARY (Continued)
- CH4 spindle drive part CH4 drive part is composed V-I converter and output power amplifiers.
V-I converter Output Power AMP Fig. 7 CH4 spindle drive part - The V-I converter converts the input voltage applied to pin24 into a incremental output current given by
di =
Vin - Vref Vin = 100K 100K
Vin = Vin - Vref
* Vin = input voltage of pin24 *Vref = reference voltage (pin23 or pin25)
- These sourcing and sinking output current from V-I converter are delivered to output power amplifiers, where they are appeared as differential output voltages given as:
DOF = Pref + di *170K
DOR = Pref - di *170K
- The differential voltage gain is, then, calculated as follows:
Vout = DOF - DOR = 2 * di *170K
Avf = 20log
DVout 2 * 170K = 20log = 10.6dB DVin 100K
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
TEST CIRCUIT
April. 2002 (Rev.0)
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4-CH MOTOR DRIVE IC
28 PGND2 DO4F DO4R VBINA VSIN VBIN VCC2
27
26
25
24
23
22 PGND
21
20 VCC1 IN3F
19
18
17
16
15
IN3R RCIN3 DO3R DO3F MUTE
AD6392
TYPICAL APPLICATION CIRCUIT
DO1F DO1R RCIN1 IN1R IN1F REFI 1 2 3 4 5 6 REFO PGND 7 SGND IN2F 8 9 10 11 12 13 14
IN2R RCIN2 DO2R DO2F PGND1
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AD6392
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AD6392 4-CH MOTOR DRIVE IC
INTERNAL CIRCUIT
Pin no Pin name Internal circuit
1,2, 12,13, 16,17, 26,27
DO1F, DO1R, DO2R, DO2F, DO3F, DO3R, DO4R, DO4F
3, 11, 18
RCIN1, RCIN2, RCIN3
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AD6392 4-CH MOTOR DRIVE IC
INTERNAL CIRCUIT (Continued)
Pin no Pin name Internal circuit
4,5, 9,10, 19,20
IN1R, IN1F, IN2F, IN2R, IN3R, IN3F
6
PREFI
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AD6392 4-CH MOTOR DRIVE IC
INTERNAL CIRCUIT (Continued)
Pin no Pin name Internal circuit
15
MUTE
22
Vcc2
23, 24, 25
VBIN, VSIN, VBINA
23 15 150k 25 15 24 15 100k
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS CURVES
Vout (V)
6
Vin vs Vout (CH4)
RL=25 ohm
5
RL=8 ohm
4
RL=4 ohm
3
2
1
VCC=8.0V Vref=2.5V Vin=sweep RL=Change Mute=high
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
0
Vin (V)
Vout (V)
6
Vin vs Vout (CH1,2,3,)
RL=25 ohm
5
RL=8 ohm
4
RL=4 ohm
3
2
1
VCC=8.0V Vref=2.5V VRCIN=sweep RL=Change Mute=high
0.0 0.5 1.0 1.5 2.0 2.5 3.0
0
Vin (V)
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS CURVES (Continued)
Vout (V)
7 6 5 4 3 2 1 0 0 2
Vcc vs Vout (CH1,2,3,)
RL=open RL=8 ohm VCC=Sweep Vref=2.5V FWD=Low REV=High RL=Change Mute=high
10 12 14 16
4
6
Vcc (V)
8
ICC (mA)
10
Vcc vs ICC
9
8
7
6
5
VCC=Sweep Vref=2.5V FWD=open REV=open RL=open Mute=high
4 6 8 10 12 14 16
4
Vcc (V)
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS CURVES (Continued)
Imute (mA)
2.2
Vcc vs Imute
2.1
2.0
1.9
1.8
1.7
VCC=Sweep Vref=2.5V FWD=open REV=open RL=open Mute=Low
4 6 8 10 12 14 16
1.6
Vcc (V)
Vout (V)
3.0
Duty vs Vout
2.5
2.0
1.5
VCC=8.0V Vref=2.5V FWD=Low REV=pulse (0V,5V,50kHz) RL=open Mute=High
1.0
0.5
0.0 0 10 20 30 40 50
Duty (%)
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS CURVES (Continued)
Avf (dB)
12
Vcc vs Avf
11
10
9
8
7
VCC=8.0V Vref=2.5V Vin=0.2Vrms, 1KHz RL=8 ohm Mute=High
6 4 6 8 10 12 14 16
Vcc (V)
Icc (mA)
8 7 6 5 4 3 2 1 0 -40 -20 0
Temp vs Icc
VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=High
20 40 60 80 100
Temperature
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
ELECTRICAL CHARACTERISTICS CURVES (Continued)
Icc (mA)
3.0
Temp vs Imute
2.5
2.0
1.5
1.0
0.5
VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=Low
-40 -20 0 20 40 60 80 100
0.0
Temperature
Avf (dB)
12.0 11.5 11.0 10.5 10.0 9.5 9.0 8.5 8.0 -40 -20 0
Temp vs Avf
VCC=8.0V Temp=Sweep Vref=2.5V RL=8 ohm Mute=High
20 40 60 80 100
Temperature
April. 2002 (Rev.0)
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AD6392 4-CH MOTOR DRIVE IC
[ 28SSOPH_375A_Type ]
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AD6392 4-CH MOTOR DRIVE IC
PACKAGE DIMENSION
[ 28SSOPH_375B_Type ]
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