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FAN8038C
4-Channel Motor Drive IC
Features
* * * * * * * * * 4-CH H-Bridge driver Built-in DC-DC converter controller Built-in Power-on reset (POR) circuit Built-in battery charging circuit Built-in battery voltage monitoring circuit Built-in thermal shutdown (TSD) circuit Built-in general OP-Amplifier Low power consumption Built-in power controller circuit
Description
FAN8038C is monolithic IC for portable CD player, and suitable for a 4-CH motor driver which drives focus acutator, tracking actuator, sled motor and spindle motor of portable CD player system. And it also provides DC-DC converter, reset, recharge, and short circuit protection.
44-QFP-1010B
Typical application
* * * * Portable Compact Disk Player (CDP) Portable Mini Disk Player (MD) Disc-Man Other Potable Compact Disk Media
Ordering Information
Device Package Operating Temp. -35C ~ +85C FAN8038C 44-QFP-1010B
Rev. 1.0.0
(c)2005 Fairchild Semiconductor Corporation
FAN8038C
Pin Assignments
FIL SGND EMPSET ADPVCC STOP START CLKIN PWM DVCC EMP RST
44
OVP
43
42
42
40
39
38
37
36
35
34 33
CHGSET
1
BATT
2
32
DO1(-)
RSTOUT
3
31
DO1(+)
DEDSET
4
30
DO2(-)
BDSW
5
29
DO2(+)
ERRO
6
FAN8038C
28
PGND
ERRI
7
27
DO3(+)
SCP
8
26
DO3(-)
COSC
9
25
DO4(+)
NC
10
24
DO4(-)
OPIN(-)
11 12
SVCC1
23 13 14 15
SVCC2
BRAKE
16
VREF
17
DI3
18
DI4
19
MUTE34
20
DI2
21
MUTE2
22
DI1
OPOUT OPIN(+)
2
FAN8038C
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Pin Name OVP BATT RSTOUT DEDSET BDSW ERRO ERRI SCP COSC N.C OPIN(-) SVCC1 OPOUT OPIN(+) SVCC2 VREF DI3 DI4 MUTE34 DI2 MUTE2 DI1 BRAKE DO4(-) DO4(+) DO3(-) DO3(+) PGND DO2(+) DO2(-) DO1(+) DO1(-) CHGSET RST EMP DVCC PWM CLKIN START STOP ADPVCC EMPSET SGND FIL I I/O I O I O O I I O I O I I I I I I I I I O O O O O O O O I O O O I I I Pin Function Description Battery voltage motor Battery power supply input Power-on reset output Dead time setting capacitor Transistor drive for voltage step-up Error amplifier output Error amplifier Input Short circuit protection time setting capacitor Triangular waveform output No connection OP-amplifier negative input Control circuit power supply OP-amplifier output OP-amplifier positiveinput Pre-driver power supply Reference voltage input Channel 3 control signal Input Channel 4 control signal Input Channel 3 and 4 mute signal input Channel 2 control signal Input Channel 2 mute signal inpu Channel 1 control signal Input Channel 1 brake signal input Channel 4 negative output Channel 4 positive output Channel 3 negative output Channel 3 positive output Power block power Ground Channel 2 positive output Channel 2 negative output Channel 1 positive output Channel 1 negative output Charge current setting resistance Power-on reset inverting output Battery voltage detection output (Empty detection) H-Bridge block power supply PWM transistor drive output External clock input DC-DC converter start control input DC-DC converter off control input Charging circuit power supply Empty dection level switch Signal ground PWM phase compensation
3
FAN8038C
Internal Block Diagram
44 43 42 41 40 39 38 37 36 35 34
1
OVP 33
Empty Detector
POWER-OFF START
Maximum Detection 2
VSYS1
Power Supply
10uA
20uA OFF V / I
32 31
Predriver
3
4
65K
5
1.25V R1
V / I
30 29 28
Predriver
6
Error Amp
7 8
R2
V / I
27 26
Predriver
1.25V
9 10 11
Triangular Waveform Thermal Shutdown
CLOCK
V / I
25 24
Predriver
VSYS1
Brake1
Control Circuit Power Supply
23
Mute34
Mute2
12
13
14
15
16
17
18
19
20
21
22
4
FAN8038C
Absolute Maximum Ratings (Ta = 25C)
Parameter Maximum supply voltage Maximum output current Power dissipation Operating temperature Stroage temperature Symbol VCC IO PD TOPR TSTG Value 13.2 500 1.0 -35 ~ +85 -55 ~ +150 Unit V mA W C C
Recommended Operating Conditions (Ta = 25C)
Parameter Charging circuit power supply voltage Power supply voltage Control circuit power supply voltage Pre-driver power supply voltage H-Bridge power supply voltage Operating Temperature Symbol ADPVCC BATT SVCC1 SVCC2 DVCC Ta Min. 3.0 1.5 2.7 2.7 -10 Typ. 4.5 2.4 3.2 3.2 PWM 25 Max. 8.0 8.0 5.5 5.5 BATT 70 Unit V V V V V C
5
FAN8038C
Electrical characteristics
(Ta=25C, BATT=2.4V, SVCC1=SVCC2=3.2V, VREF=1.6V, ADPVCC=0V, fCLKIN=88.2KHz, unless otherwise specified) Parameter COMMON SECTION BATT Stand-by Current BATT Supply Current (No Load) SVCC Supply Current (No Load) SVCC2 Supply Current (No Load) ADPVCC Supply Current (No Load) H-BRIDGE DRIVER PART Voltage Gain CH1, 3, 4 Voltage Gain CH2 Gain Error By Polarity Input pin Resistance CH1, 3, 4 Input pin Resistance CH2 Maximum Output Voltage Saturation Voltage (Lower) Saturation Voltage (Upper) Input offset Voltage Output Offset Voltage CH1, 3, 4 Output Offset Voltage CH2 DEAD Zone Brake1 On Voltage Brake1 Off Voltage MUTE2 On Voltage MUTE2 Off Voltage MUTE34 On Voltage MUTE34 Off Voltage VREF On Voltage VREF Off Voltage BRAKE1 Brake Current *Granteed Design Value GVC134 GVC2 GVC RDI134 RDI2 VOUT VSAT1 VSAT2 VIO VOO134 VOO2 VDB VM1ON VM1OFF VM2ON VM2OFF VM34ON VM34OFF VREFON VREFOFF IBRAKE DI1=1.8V DI1=1.8V DI2=1.8V DI2=1.8V DI3=DI4=1.8V DI3=DI4=1.8V IN1=IN2=IN3=IN4=1.8V IN1=IN2=IN3=IN4=1.8V Brake Current IN=1.7 and 1.8V IN=1.7 and 1.8V RL=8, DVCC=BATT=4V, IN=0 ~ 3.2V IO= -300mA, IN=0 and 3.2V IO=300mA, IN=0 and 3.2V VREF=IN=1.6V VREF=IN=1.6V 12 21.5 -2 9 6 1.9 -8 -70 -130 -20 2.0 2.0 2.0 1.2 4 14 23.5 0 11 7.5 2.1 240 240 0 0 0 0 7 16 24.5 2 13 9 400 400 8 70 130 20 0.8 0.8 0.8 0.8 10 dB dB dB K K V mV mV mV mV mV mV V V V V V V V V mA IST IBATT ISVCC1 ISVCC2 IADPVCC BATT=10.5V, SVCC1=SVCC2=VREF=0V DVCC=0.45V, MUTE34=3.2V DVCC=0.45V, MUTE34=3.2V, ERRI=0V DVCC=0.45V, MUTE34=3.2V ADPVCC=4.5V, ROUT=OPEN 2.5 3.0 3.5 0.2 5 3.5 3.5 5.0 1.0 A mA mA mA mA Symbol Conditions Min. Typ. Max. Unit
6
FAN8038C
Electrical Characteristics
(Ta=25C, BATT=2.4V, SVCC1=SVCC2=3.2V, VREF=1.6V, ADPVCC=0V, fCLKIN=88.2KHz, unless otherwise specified) Parameter PWM POWER SUPPLY DRIVING PWM Sink Current *DVCC Level Shift Voltage DVCC Leak Current *PWM Amp Transfer Gain DC-DC CONVERTER ERROR AMP SVCC1 Pin Threshold Voltage ERRO Pin Output Voltage H ERRO Pin Output Voltage L SHORT CIRCUIT PROTECTION SCP Pin Voltage SCP Pin Current 1 SCP Pin Current 2 SCP Pin Current 3 *SCP Pin Impedance SCP Pin Threshold Voltage Over Voltage Protection Detect TRANSISTOR DRIVING BDSW Pin Output Voltage 1H BDSW Pin Output Voltage 2H BDSW Pin Output Voltage 2L BDSW Pin Oscillating Reequency1 SW Pin Oscillating Reequency 2 BDSW Pin Oscillating Reequency 3 *BDSW Pin Minimum Pulse Width Pulse Duty Start MAX. Pulse Duty at Self-Running MAX. Pulse Duty at CLKIN Synchronization *Granteed Design Value VSW1H VSW2H VSW2L fSW1 fSW2 fSW3 TSWMIN DSW1 DSW2 DSW3 BATT=COSC=1.5V =SVCC2=0V, 10mA COSC=0V, IO = -10mA, ERRI=0.7V SCP=0V CT=2V, IO=1-mA COSC=470pF, =SVCC2=0V COSC=470pF, CLKIN=0V COSC=470pF COSC=470pF, ERRO=0.5 0.7V COSC=470PF, SVSS1,SVCC2=0V COSC=470pF, ERR0=0.8V, CLKIN=0V ERR0=0.8V, COSC=470pF 0.78 1.0 65 60 0.01 40 50 45 0.98 1.5 0.3 80 70 88.2 50 60 55 1.13 0.45 95 82 0.6 60 70 65 V V V KHz KHz KHz s % % % VSCP ISCP1 ISCP2 ISCP3 RSCP VSCPTH VOVP ERRI=1.3V ERRI=0.7V ERRI=1.3V, OFF=0V ERRI=1.3V, BATT=9.5V ERRI=0.7V, COSC=470PF OVP Voltage 6 12 12 175 1.10 9.5 0 10 20 20 220 1.20 10 0.1 16 32 32 265 1.30 10.5 V A A A K V V VS1TH VEOH VEOL ERRI=0.7V, IO = -100A ERRI=1.3V, IO = 100A 3.05 1.4 3.20 1.6 3.35 0.3 V V V IPWM VSHIF IDLK GPWM DI1=2.1V DI1=1.8V, DVCC-OUT1F DVCC=9V, SVCC1,2=BATT=0V DI1=1.8V, DVCC=1.2V ~ 1.4V 10 0.35 1/60 13 0.45 0 1/50 17 0.55 5 1/40 mA V A 1/K Symbol Conditions Min. Typ. Max. Unit
7
FAN8038C
Electrical Characteristics
(Ta=25C, BATT=2.4V, SVCC1=SVCC2=3.2V, VREF=1.6V, ADPVCC=0V, fCLKIN=88.2KHz, unless otherwise specified) Parameter DEAD TIME *DEDSET Pin Impedance DEDSET Pin Output Voltage INTERFACE STOP Pin Threshold Voltage STOP Pin Bias Current START Pin On Threshold Voltage START Pin Off Threshold Voltage START Pin Bias Current CLKIN Pin Threshold Voltage H CLKIN Pin Threshold Voltage L CLKIN Pin Bias Current START CURCUIT Starter Switching Voltage Starter Switching Hysteresis Width Discharge Release Voltage RESET CIRCUIT *SVCC1 RESET Threshold Voltage Ratio RESET Detection Hysteresis Width RSTOUT Pin Output Voltage RSTOUT Pin Pull Up Resistance RST Pin Output Voltage 1 RST Pin Output Voltage 2 *RST Pin Pull Up Resistance *Granteed Design Value RRSTOTH VRSTHS VRSTO RRSTO VRST1 VRST2 RRST IO=1mA, SVCC1,SVCC2=2.8V IO= -1mA, SVCC1,SVCC2=2.8V IO= -1mA, SVCC1,SVCC2=0V 85 25 72 2.0 2.0 77 90 50 90 95 95 100 0.5 108 2.4 2.4 113 % mV V K V V K VSSV VSSHS VDIS SVCC1,SVCC2=0V 3.2V START=0V START=0V 2.3 130 1.63 2.5 200 1.83 2.7 300 2.03 V mV V VSTOPTH ISTOP VSTATH1 VSTATH2 ISTART VCLKINTH
H
Symbol RDEDSET VDEDSET
Conditions ERRI=1.3V OFF=0V SVCC1,SVCC2=0V, COSC=2V SVCC1,SVCC2=0V, COSC=2V START=0V CLKIN=3.2V
Min. 52 0.78 2.0 75 1.3 13 2.0 -
Typ. 65 0.88 95 16 -
Max. 78 0.98 115 2.1 19 0.8 10
Unit K V V A V V A V V A
VCLKINTH
L
ICLKIN
8
FAN8038C
Electrical Characteristics
(Ta=25C, BATT=2.4V, SVCC1=SVCC2=3.2V, VREF=1.6V, ADPVCC=0V, fCLKIN=88.2KHz, unless otherwise specified) Parameter OP-AMP Input Bias Current Input Offset Voltage High Level Output Voltage Low Level Output Voltage Output Drive Current (Source) Output Drive Current (Sink) *Open Loop Voltage Gain *Slew Rate BATTERY CHARGING CURCUIT CHGSET Pin Bias Voltage *CHGSET Pin Output Resistance EMPSET Pin Leak Current 1 EMPSET Pin Leak Current 2 EMPSET Pin Saturation Voltage EMPTY DETECTION EMP Detection Voltge 1 EMP Detection Voltge 2 EMP Detection Hysteresis Voltage 1 EMP Detection Hysteresis Voltage 2 EMP Pin Output Voltage EMP Pin Output Leak Current *OVP Pin Input Resistance OVP Pin Leak Current EMP_SET Pin Detection Voltage EMP_SET Pin Detection Current *Granteed Design Value VEMPT1 VEMPT2 VEMHS1 VEMHS2 VEMP IEMPLK ROVP IOVPLK VEMPSET IEMPSET VEMPSET = 0V IEMPSET = -2A VEMPSET = 0V IEMPSET = -2A IO = 1mA, OVP = 1V OVP = 2.4V VEMPSET = 0V SVCC1 = SVCC2 = 0V, OVP = 4.5V VEMPSET = BATT-EMPSET, OVP = 2V EMPSET 2.1 1.7 25 25 17 1.5 -2 2.2 1.8 50 50 23 2.3 1.9 100 100 0.5 1.0 27 1.0 V V mV mV V A K V V A VCHGSET RCHGSET IEMPSET IEMPSET VEMPSET ADPVCC=4.5V, CHGSET=1.8k ADPVCC=4.5V ADPVCC=4.5V, CHGSET=OPEN ADPVCC = 0.6V, CHGSET = 1.8k ADPVCC = 4.5V, IO = 300mA, CHGSET = 0 0.71 0.75 0.81 0.95 0.45 0.91 1.20 1.0 1.0 1.0 V K A A V IBIAS VOFOP VOHOP VOLOP VSOURCE VSINK GVO SR IN(+)=1.6V IN(+)=1.6V RL=OPEN RL=OPEN 50 GND 50 SVCC VIN= -75dB, F=1kHz -5.5 2.8 0.4 0 -6.5 0.7 70 0.5 300 5.5 0.2 -3.0 nA mV V V mA mA dB V/s Symbol Conditions Min. Typ. Max. Unit
9
FAN8038C
Application Information
1. BAKE AND MUTE FUNCTION * Of the four channel drivers, channel 1 has a brake function, and the other channels have a mute function. * When the BRAKE (pin23) is set to high level, both channel 1 outputs go low level. (Brake mode). * When the MUTE2 (pin21) is set to high level, the channel 2 output is muted. * When the MUTE34 (pin19) is set to high level, the channel 3 and 4 outputs are muted. * 2. REFERENCE VOLTAGE(VREF) DROP MUTE * When the voltage applied to VREF (pin16) is 1.0V or less (typical), the H-bridge driver outputs are set to high impedance.
3. THERMAL SHUTDOWN (TSD) * If the chip temperature reaches 150C (typical), the H-bridge driver output current is cut-off and the thermal shut down circuit has a hysteresis temperature of 25C.
4. H-BRIDGE DRIVER (4-CHANNELS) * The driver input resistance is 11K(typical) for channels 1, 3 , and 4, and 7.5K for channel 2. Set the gain according to the following formula. * Channel CH1 CH3 CH4 Gain Unit dB
Gv = 20 log
55 K 11K + REXT 110 K 7.5 K + REXT
CH2
Gv = 20 log
dB
where, REXT is externally connected input resistance. 5. SWITCHING REGULATED POWER SUPPLY DRIVE * The power supply of H-bridge driver consists of DVCC(pin36) for output stage power supply and VSYS2 (pin15) for predriver power supply.
VBAT
PWM
37
15
36
44
Maximum Detector
Predriver
25 24
27 26
29 30
31 32
9
Triangular Waveform
28
Figure 1. Switching Regulated Power Supply
10
FAN8038C
6. DC-DC CONVERTER CONTROL CIRCUIT 6-1. Set to output voltage * The DC-DC converter output voltage, SVCC1, is set by internal resistors R3 and R4 and the voltage, SVCC1, is defined as follows.
SVCC1 = (1 +
R3 )1.267 = 2.5[V ] R4
* This voltage, SVCC1, can be varied with the addition of an external resistors R1 and R2 as shown Figure.2 and the voltage is defined as follows.
R2 R4 R1 R 3 + R1 + R 3 R 2 + R 4 x 1.267[V ] SVCC 1 = R2 R4 R2 + R4
* Where, R1 and R2 are exteranl resistors, and R3 and R4 are internal resistors.
2
10uA VBAT CSCP
8 6
1.25V Short Circuit Protection
7 12
R1 R2 R4
SVCC1
R3
Error Amp
1.267V
65 K
PWM Comp
R 3 = 30 K R 4 = 30 .5 K
SVCC1
Triangular Waveform
9
COSC
5
4
CDEDSET
1.267V
34
3
Figure 2. Schematic of DC-DC Converter
6-2. Power-on Reset function * If the output voltage of DC-DC conver, SVCC1,is over than 90%, the RSTOUT(pin3) goes from low level to high level, and RST (pin34) goes to high level to low level. The reset voltage has 50mV of hysteresis to prevent output chattering. 6-3. Delayed Short Circuit Protection * When the error amplifier output (pin6) become high level state during the abnormal conditions such as over load or short ciruit, the exteral capacitor, CSCP, is charged, and when the SCP (pin8) voltage reaches 1.25V(typ.), the PWM comparator output, BDSW(pin5), is shwitch-off.
11
FAN8038C
* The time until switching-off is set by the capacitor, CSCP, and the equation is as follows:
t SCP =
CSCP x VSCP [sec] iSCP
where, VSCP = 1.25[V ], iSCP = 10[uA]
6-4. Soft Start Function * The soft start function operates when a capacitor is connected between DEDSET(pin4) and GND. Also, the maximum duty cab be varied by connecting a resistor to pin4.
t SOFT = C DEDSET x R Where, R = 65[ K]
7. POWER OFF FUNCTION * When low level is applied to STOP (pin40), SCP (pin8) is charged, and when the voltage reaches 1.25V (typical), the PWM comparator output, BDSW(pin5), is shwitch-off. * The time until switching-off is set by the capacitor, CSCP, and the equation is as follows:
tOFF =
CSCP x VTH [sec] iOFF
Where, VTH = 1.25[V ], iOFF = 20[uA]
* 8. BATTERY CHARGER AND MONITORING FUNCTION 8-1. Set to Battey Charging Current * The power supply for the charging circuit is ADPVCC (pin41), and battery charger circuit is separated from any other block. The resistance between CHGSET (pin33) and GND sets the charging current, iCHG. * This current, iCHG, is drawn from EMPSET (pin42). * The thermal shutdown circuit is provided, and when the chip temperature rise up to about 150C the charging current, iCHG, is cut-off and it has the temperature hysteresis of about 30C. 8-2. Over Voltage Protection * When the voltage applied to the OVP (pin1) reaches 9.7V, SCP (pin8) is charged, and when the voltage reaches 1.25V (typical), the PWM comparator output, BDSW(pin5), is shwitch-off. * The time until switching-off is set by the capacitor, CSCP, and the equation is as follows: *
tOVP =
CSCP x VTH [sec] iOVP
Where, VTH = 1.25[V ], iOVP = 20[uA]
* 8-3. Empty Detecting Circuit * when the voltage applied to the OVP (pin1) falls below the detector voltage, EMP (pin35) goes from high level to low level (open collector output). The detector voltage has 50mV of hysteresis to prevent output chattering. * EMPSEL (pin42) to switch the detection voltage as shown below. * EMPSET Detect Voltage Hysteresis Mode LOW HIGH-Z 2.2V 1.8V 50mV 50mV Battery Mode Adapter Mode
12
FAN8038C
Typical Performance Characteristics
Temp vs V S1TH 3. 20 3. 18 3. 15
Temp vs V ovp 10.50 10.25 V ovp10.00 [V ] 9.75
V S1TH 3. 13 [V ] 3. 10 3. 08 3. 05 -35 -20 -5 10 25 40 55 70 85 Temp[]
BATT vs IST
9.50 -35 -20 -5 10 25 40 55 70 85 Temp[]
BATT vs IBATT 4 3 IBATT 2 [mA] 1 0
0.1 0.05 IST [mA] 0 -0.05 -0.1 1.5 2.5
3.5
4.5
5.5
6.5
7.5
1. 5
2. 5
3. 5
4. 5
5. 5
6. 5
7. 5
BATT[V ]
BATT[V ]
Temp vs V EMPSET 1. 8 1. 6
T E S PM E
Temp vs ISINK 1 0. 9 0. 8 ISINK 0. 7 [mA] 0. 6 0. 5
V
[V ]
1. 4 1. 2 1 -35 -20 -5
10
25
40
55
70
85
0. 4 -35 -20
-5
10
25
40
55
70
85
Temp[]
Temp[]
13
FAN8038C
Application Circuits
Adaptor
Battery Battery
STOP START Clock
44 43 42 41 40 39 38 37 36 35 34
1
OVP
33
Empty Detector
POWER-OFF START
Maximum Detection
2 VSYS1
Power Supply
10uA
20uA OFF V / I 32 Predriver
RESET
3
31
4 65K 5 V / I R1 6 Error Amp 7 R2 28 30 Predriver
1.25V
29
8
V / I
27
Predriver
26
1.25V
9
Triangular Waveform Thermal Shutdown
CLOCK
V / I
25
Predriver
24
10
VSYS1
Brake1
11 Control Circuit Power Supply
23
Mute34
Mute2
12
13
14
15
16
17
18
19
20
21
22
VREF
DI3
DI4
MUTE34 DI2
MUTE1 DI1 BRAKE
Servo Pre Amp & Controller
14
FAN8038C
Package Dimension
15
FAN8038C
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 11/18/04 0.0m 001 Stock#DSxxxxxxxx 2005 Fairchild Semiconductor Corporation
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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