View AN8819_39490.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ICs for CD/CD-ROM Player
AN8819NFB
4Ch. Linear Driver IC + DC-DC Converter Control for CD
s Overview
The AN8819NFB is a 4ch. driver employing the low consumption power type H-bridge method which can operate with low voltage. It is suitable particularly for a portable CD player.
33 23 22
+ 0.1
Unit : mm
34
0.3 - 0.05 10.00.3
s Features * Wide output D-range is available regardless of the reference voltage on the system Driver input/output gain setting enabled by an external resistance * For 2 channels, independent power on/off feature builtin. For other 2 channels, simultaneous on/off feature provided. * Thermal shut down circuit (with hysteresis) built-in * PWM control of the driver supply enabled by an external circuit for low consumption power operation * Construction of DC-DC converter enabled by an external circuit * Construction of ripple filter for D/A converter enabled by an external capacitor * Construction of PWM control circuit of laser output by an external circuit for low consumption power operation * Reset circuit with a mute and battery voltage detection circuit built-in for rational design of a set
*
44
12
1 0.10.1
11
0.90.1 2.00.3
(0.6) 10.00.3 12.20.4
44-lead QFP package (QFP044-P-1010)
s Application
Actuator for CD, motor drive
0.2 - 0.05 0.90.1
+ 0.1
12.20.4
0.8
AN8819NFB
s Block Diagram
+
-
34 PGND
33
26
25
24
23
29
30
31
32
28 27 6
7
SGND 35 36 37 10 39 41 9
-+
42 BTL BTL BTL
BTL
Max. Value Thermal Shutdown Starter exchange Initial setting POWER OFF
- + - +
43 Absolute Value Absolute Value Absolute Value
- +
44
Absolute Value
+ - +
- + -+ -+ -+ - +
-
-+
DRVCC 14 Ripple Filter
15
16
17
18
19
20
21
22
13 12
11 5 SVCC
- +
PWM
Starter
38
1 PVCC
40
Switching Circuit
3
4
8
2
ICs for CD/CD-ROM Player
DC-DC Conv.
ICs for CD/CD-ROM Player
s Pin Description
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 PVCC Supply Pin DED Dead Time Input Pin OUT DC-DC Converter Output Pin FB Error Amp. Input Pin IN Error Amp. Output Pin DRGND Ground Pin SGND Ground Pin SPRO Short-Circuit Protection Input Pin BSEL Empty Detection Level Changeover Pin VSEN Empty Detection Input Pin SVCC Power Pin CRIP Capacitor Pin for Ripple Rejection AVDD Ripple Filter Ouput Pin DRVCC Supply Pin VREF 1/2 VCC Input Pin INFO Driver Input Pin INTR Driver Input Pin LDON Driver ON - OFF Control Pin INSP Driver Input Pin PC Driver ON - OFF Control Pin INTV Driver Input Pin TRVSTOP Driver ON - OFF Control Pin Pin Name Pin No. 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 Pin Name TR- Driver Output Pin TR+ Driver Output Pin FO - Driver Output Pin FO + Driver Output Pin PGND Ground Pin PGND Ground Pin SP + Driver Output Pin SP - Driver Output Pin TV+ Driver Output Pin TV- Driver Output Pin VC Driver Power Voltage Pin TB PWM Circuit Output Pin RESET Reset Output Pin MRST Muting Reset Output Pin EMP Empty Detection Output Pin CLK External Synchronization Input Pin START Start Oscillation Start Input Pin POWER Power On/Off Input Pin CT Triangular Wave Oscillation Pin
AN8819NFB
PWMG PWM Loop Gain Adjustment Pin COMPO APC Comparator Output Pin COMPI APC Comparator Input Pin
s Absolute Maximum Ratings (Ta=25C)
Parameter Supply Voltage VSEN Pin Maximum Applied Voltage VC Pin Maximum Applied Voltage Supply Current Power Dissipation Note) Operating Ambient Temperature Storage Temperature Note) Unit Symbol PVCC SVCC DRVCC V10max. V33max. ICC PD Topr Tstg 880 -25 ~ + 75 -55 ~ + 125 Rating 15 6 6 15 9 V V mA mW C C V Unit
s Recommended Operating Range (Ta=25C)
Parameter Operating Supply Voltage Range Symbol PVCC SVCC DRVCC Range 1.5V ~ 9V 2.7V ~ 5.5V 2.7V ~ 5.5V
AN8819NFB
s Electrical Characteristics (Ta=25C2C)
Parameter SVCC No Load Supply Current DRVCC No Load Supply Current PVCC No Load Supply Current PVCC Leak Current Driver Portion Maximum Drive Voltage of Pins FO, TR, SP and TV Maximum Drive Current Focus/Tracking/Traverse Transmission Gain (+) Spindle Transmission Gain (+) Focus/Tracking/Traverse Output Offset Voltage Spindle Output Offset Voltage Focus/Tracking/Traverse Input Conversion Dead Zone Spindle Input Conversion Dead Zone DC-DC Converter Portion CLK Synchronization Output Pulse Maximum Duty Self-Running Output Pulse Maximum Duty Starting Output Pulse Maximum Duty D2C PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470k, VIN = 0.8V PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470k, VIN = 0.8V PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470k, VIN = 0.8V PVCC = 2.4V, SVCC = 3.2V IOUT = -25mA, VCT = 0V, VFB = 0.7V PVCC = 2.4V, SVCC = DRVCC = 3.2V, IOUT = 15mA, VCT = 1V, VFB = 0.5V PVCC = 3.2V, SVCC = 0V CT = 390pF/470k PVCC = 2.4V, SVCC = DRVCC = 3.2V, CT = 390pF/470k Symbol I11Q I14Q I1Q I1L Condition PVCC = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC1 = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC1 = 2.4V, SVCC = DRVCC = 3.2V, VREF = 1.6V PVCC = 9V, SVCC = DRVCC = 0V, VERF = 0V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V PVCC = 4V, SVCC = DRVCC = 3.2V
ICs for CD/CD-ROM Player
min. 2.0 1.8 1.8
typ. 3.1 2.4 2.6
max. 4.5 3.0 5.1 2.0
Unit mA mA mA A
VDMAX IDMAX G+ Gsp + VOFF VSPOFF IDZ ISpDZ
DRVCC -1.2 500 33 67 -50 -100 -1 -2 43 87 53 107 50 100 1 2
V mA k k mV mV A A
65
74
83
%
D2F
74
80
86
%
D2S
35
45
55
%
Self-Running Output Voltage (H)
V20H
1.08
1.5
1.71
V
Self-Running Output Voltage (L) Starting Oscillation Frequency Self-Running Oscillation Frequency Ripple Filter Portion Ripple Rejection Ratio
V20L F41S F41F
0.15 60 54
0.3 83 65
0.4 115 76
V kHz kHz
RR13
PVCC = 2.4V, SVCC = DRVCC = 3.2V, Input = 35mVrms/20kHz
40
dB
ICs for CD/CD-ROM Player
s Pin Description
Pin No. Symbol I/O Pin Description Supply pin for control circuits other than of driver, not connected with DRVCC, PVCC Equivalent Circuit
AN8819NFB
11
SVCC
I
11
7
SGND
I
Ground pin for control circuits other than of driver
7
14
DRVCC
I
Supply pin for control circuit of driver, not connected with SVCC, PVCC
14
6
DRGND
I
Ground pin for control circuit of driver
6
1
PVCC
I
Supply pin supplying the current for output power transistor
1
27 27 28 PGND I Ground pin for output power transistor 28
SVCC
2 2 DED Setting pin for dead time control input and soft start
50k
25k
PVCC
3
OUT
O
Switching output pin 3
200
15k
AN8819NFB
s Pin Description (Cont.)
Pin No. Symbol I/O Pin Description
ICs for CD/CD-ROM Player
Equivalent Circuit
4
FB
O
Error amp. output pin
26.9k SVCC
SVCC
13.1k
5
IN
I
Error amp. input pin 5 4
16.4k
8
SPRO
I
Short-circuit protection input pin
8
22k 32k
20k
40
POWER
I
Switching output ON/OFF pin
40
79k 62k
13
SVCC
13
AVDD
O
Supply pin for D/A converter
SVCC
12
CRIP
External capacitor pin for ripple rejection
12
ICs for CD/CD-ROM Player
s Pin Description (Cont.)
Pin No. Symbol I/O Pin Description
DRVCC
AN8819NFB
Equivalent Circuit
15
VREF
I
VREF input pin
15
40k 80k
16
INFO
I
Input pin for Driver FO
16
DRVCC or
17
INTR
I
Input pin for Driver TR
17
VREF or 1k
19
INSP
I
Input pin for Driver SP
19
or
21
INTV
I
Input pin for Driver TV
21
DRVCC
18
LDON
I
Power cut input pin for Drivers FO, TR. Driver output at L = GND
18
or 1k
20 20 PC I Power cut input pin for Driver SP. Driver output at H = GND 22 22 TRV STOP I Power cut input pin for Driver TV. Driver output at H = GND
100k
DRVCC
86k
86k
23 24 25 26 30 29 32 31 33
TR- TR+ FO - FO + SP - SP + TV- TV+ VC
O O O O O O O O O
- output pin of Driver TR + output pin of Driver TR - output pin of Driver FO + output pin of Driver FO - output pin of Driver SP + output pin of Driver SP - output pin of Driver TV + output pin of Driver TV Driver supply pin
33
24 29
or or
26 31
or
23 30
or or
25 32
or
AN8819NFB
s Pin Description (Cont.)
Pin No. Symbol I/O Pin Description
PVCC
ICs for CD/CD-ROM Player
Equivalent Circuit
9
BSEL
I
Pin switching the dry cell and charger battery for battery voltage detection circuit
30k
70k
9
7.8k
10
9.9k
10
VSEN
I
Battery voltage detection input pin for battery voltage detection circuit
7k
37
EMP
I
Battery shortage detection output pin for battery voltage detection circuit
37
40k
35
RESET
O
Reset output pin. Reset voltage = Output voltage x 90%
35
PVCC PVCC 20k 60k
36 Muting reset output pin. Reset voltage = Output voltage x 90%
36
MRST
O
PVCC PVCC
39
START
O
Start pin. OUT pin starts switching in start mode
200k
39
100k
ICs for CD/CD-ROM Player
s Pin Description (Cont.)
Pin No. Symbol I/O Pin Description Equivalent Circuit
AN8819NFB
50k
38
CLK
I
Clock input pin, used to synchronize the triangular wave oscillation with clock.
38
20k 50k 160k
41
CT
O
Triangular wave oscillation pin. Oscillation frequency determined by external R and C. Recommendable values : 470k, 390pF
41
60k PVCC
34
TB
O
Transistor base pin for controlling the driver supply voltage PWM
34
DRVCC
42
PWMG
Gain adjustment pin for controlling the driver supply voltage PWM
42
43
COMP0
O
APC switching comparator output pin
43
SVCC
44
COMP1
I
APC switching comparator input pin
44
1k
AN8819NFB
s Characteristic Curve
PD -Ta
2,000 1,800 1,786 1,600 Power Dissipation PD (mW) 1,400 1,200 1,000 880 800 600 400 200 0 0 25 50 75 100 125 150 Ambient Temperature Ta (C) Unit Rthj- a = 142C/W PD = 880mW (25C) Glass epoxy board (50mm x 50mm x 0.8mm) Rthj- a = 70C/W PD =1786mW (25C)
ICs for CD/CD-ROM Player
s Description for use * Driver Portion
Set the driver gain calculated by the equation shown below, except for SP driver. For SP driver, the gain must be set to the calculated value + 6dB. G= 43k 1.0k + R R : External input resistance
The total channel driver supply is Pin33. Set the driver supply as necessary, since the output amplitude increases with increase of the supply voltage. However, also increase the voltage of DRVCC pin (Pin14) at the same time. As protection functions, VREF detection and heat protection circuits are incorporated. VREF detector sets the driver output to high impedance, when the voltage applied to VREF is 0.75V or less. For the heat protective circuit, the set temperature for operation is approx. 150C and the release temperature is approx. 120C. FO and TR drivers have the built-in function for making short-circuit between either loading end and GND by LDON (Pin18), and for SP and TV drivers by PC (Pin20) and TRVSTOP (Pin22). LDON : Output GND at L PC : Output GND at H TRVSTOP : Output GND at H
ICs for CD/CD-ROM Player
* DC-DC Converter Portion
AN8819NFB
3.4V regulator can be constructed by using external components. The output voltage can be made variable by using an external resistance. The short-circuit protective function stops switching of OUT pin (Pin3), unless the output of error amplifier (Pin4) reaches L after H, within t = CSPRO x VTH/ISPRO (VTH = 1.1V ISPRO = 30A). (It is recommended that an electrolytic capacitor of 4.7F around should be used for Pin3.) The soft start function works by attaching a capacitor to Pin2 for GND. t = CDED x R (R = 60k) Also, MAX duty can be changed by attaching an external resistance to Pin2. The output voltage is determined as follows: (Example) Assuming R1 + R2 = 50k
1.11V R3
+ -
SVCC
11
R1
IC Inside
SVCC = 1.1 x
R1 x R3 R1 + R3
+
R2 x R4 R2 + R4
5
R2 IN R4
R2 x R4 R2 + R4
FB
4
Where R3 = 26.9k R4 = 13.1k
* Ripple Filter Portion for DA Converter (Ripple Filter of Low Saturation Voltage Type)
Attach a capacitor for noise removal to CRIP pin for GND. (A capacitor of 22F around is recommended.) Output current : 10mA (typ.)
* Battery Voltage Detection Circuit
The voltage applied to VSEN pin (Pin10) and the constant voltage are compared for output to EMP pin (Pin37). There is approx. 50mV of hysteresis from detection to reset to prevent the output chattering. The detection threshold voltage can be made variable by an external resistance. The threshold values with no external resistances at VSEN pin (Pin10) are as follows: Detection : VSEN = 2.2V (typ.) BSEL (Pin9) = L Reset : VSEN = 2.25V (typ.) BSEL (Pin9) = L Detection : VSEN = 1.8V (typ.) BSEL (Pin9) = HiZ Reset : VSEN = 1.85V (typ.) BSEL (Pin9) = HiZ Use the following equation as reference to determine the detection threshold voltage:
R1 VSEN' VSEN
10
Assuming that the voltage of VSEN (Pin10) at battery shortage detection is VSEN' VSEN' = R1 + R2 + R3 x 1.25 R3
R2
+ -
Where
R3
IC Inside
1.25V
37
EMP
R1 : External Resistance R2 : 8.0k R3 : 16.5k (BSEL = HiZ) R3 : 10.5k (BSEL = L)
* RESET and MRST Portions
RESET (Pin35) is changed from L to H, and MRST pin is changed from H to L, with approx. 90% of the output voltage by a DCDC converter.

▲Up To Search▲

Price & Availability of AN8819

	To Download AN8819 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .