View AN8783SB_39466.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ICs for Compact Disc/CD-ROM Player
AN8783SB
4-channel linear driver IC for CD/CD-ROM drive
s Overview
The AN8783SB employs one channel of power op-amp. system and three channels of H-bridge system. Two channels out of three channels of Hbridge method are a current feedback system. So this IC is optimum for driving an actuator and a motor of CD/CD-ROM drive. It comes with a surface mount package which excels in a heat radiation characteristic.
18.40.2 (5.15) (4.8) 28 22 21 15 (1.315)
8.30.2 10.930.30
Unit: mm
0.30-0.05
+0.10
0 to 10 1 7 8 14 0.650.20
2.70.2
s Features
* Little phase delay due to current feedback system (2-channel for actuator) * 4 modes of forward, reverse rotations, braking and standby can be selected from channels for loading motor (H-bridge method) by a digital signal from a microcomputer. * Wide output dynamic range regardless of reference voltage of the system * Setting the input level of a driver by an external resistor is possible. * PC (power cut) function built-in (common for ch. 1, ch. 3 and ch. 4) * Thermal shut-down circuit built-in (with hysteresis)
(1.2) 0.8
(6.4)
0.35+0.10 -0.05 Seating plane
HSOP042-P-0400
s Applications
* CD/CD-ROM drive
0.10.1
1
AN8783SB
s Block Diagram
PVC1 PVC2
ICs for Compact Disc/CD-ROM Player
PVC3
PVC4 8
D1+
D1-
D2-
D2+
D3+
D3-
D4+
D4-
S3
21
20
18
17
15
16
14
12
13
5
10
9
1/2 PVCC PGND1
BTL linear driver ch. 2
BTL linear driver ch. 3
BTL linear driver ch. 4
6 11 PGND2 7 2 22 VREF PC1
19
ch. 1 Direction det. current amp. ch. 2 Control logic ch. 3 ch. 4
Reset
28
SVCC Thermal protect
Absolute V-l direction det.
Absolute V-l direction det.
Fin
Comp. SVCC monitor VREF monitor
27
23
25
24
26
3
4
N.C.
IN1
AS
IN2
PC2
IN3
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Description PC1 (power cut) input pin Driver-3 phase compensation pin Driver-3 input pin Driver-4 input pin Driver-3 feedback pin Driver-4 feedback pin Driver-4 phase compensation pin Driver-4 current feedback power supply pin Driver-4 reverse rotation output pin Driver-4 forward rotation output pin Driver-2, driver-4 GND pin Driver-3 reverse rotation output pin Driver-3 current feedback power supply pin Driver-3 forward rotation output pin Driver-2 forward rotation output pin Pin No. 16 17 18 19 20 21 22 23 24 25 26 27 28 Fin Description Driver-2 power supply pin Driver-2 reverse rotation output pin Driver-1 reverse rotation output pin Driver-1 GND pin Driver-1 forward rotation output pin Driver-1 power supply pin VREF input pin Driver-1 input pin Driver-2 input pin Driver-2 output voltage adjustment pin PC2 (power cut) input pin N.C. Power supply pin GND pin
2
IN4
1
S4
ICs for Compact Disc/CD-ROM Player
s Absolute Maximum Ratings
Parameter Supply voltage Supply current Power dissipation
*2 *1
AN8783SB
Symbol SVCC ICC PD Topr Tstg
Rating 14.4 542 -30 to +85 -55 to +150
Unit V mA mW C C
Operating ambient temperature Storage temperature
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: Referring to "s Application Circuit Example", use within the range of PD = 542 mW or less at Ta = 85C, following the allowable power dissipation characteristic curve of "s Application Notes".
s Recommended Operating Range
Parameter Supply voltage Symbol SVCC PVC1 , PVC2 Range 6.4 to 14 4.5 to 14 Unit V
s Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 , VPC1 = 0 V, VPC2 = 5 V, Ta = 25C
Parameter Current consumption 1 with no signal Current consumption 2 with no signal Current consumption 3 with no signal Driver 1 Output offset voltage Gain (+) Relative gain (+/-) Limit voltage (+) Limit voltage (-) Driver 2 Output voltage 1 (+) Output voltage 1 (-) Output voltage 2 (+) Output voltage 2 (-) V21+ V21- V22+ V22- VPC1 = 5 V, VPC2 = 0 V, VIN2 = 1 V, RAS = 10 k VPC1 = 5 V, VPC2 = 0 V, VIN2 = 4 V, RAS = 10 k VPC1 = 5 V, VPC2 = 0 V, VIN2 = 1 V, RAS = 0 k VPC1 = 5 V, VPC2 = 0 V, VIN2 = 4 V, RAS = 0 k 2.4 -3.0 3.4 2.7 -2.7 4.0 -4.0 3.0 -2.4 -3.4 V V V V VOOF-1 G1+ G1- VL1+ VL1- -30 18.5 -3.0 6.5 0 21.0 0 8.0 -8.0 30 23.5 3.0 -6.5 mV dB dB V V Symbol ISVCC IVCC1 IVCC2 Conditions IIN1 = IIN3 = IIN4 = 0 A IIN1 = IIN3 = IIN4 = 0 A IIN1 = IIN3 = IIN4 = 0 A Min Typ 15 4 1 Max 30 6 4 Unit mA mA mA
3
AN8783SB
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 , VPC1 = 0 V, VPC2 = 5 V, Ta = 25C (continued)
Parameter Driver 2 (continued) Braking ability Input pin bias current Driver-2 power transistor current at power cut Driver 3 Output offset voltage Gain (+) Relative gain (+/-) Limit voltage (+) Limit voltage (-) Dead zone width Driver 3 Output offset voltage Gain (+) Relative gain (+/-) Limit voltage (+) Limit voltage (-) Dead zone width Power cut operation PC1 threshold high-level voltage PC1 threshold low-level voltage PC2 threshold high-level voltage PC2 threshold low-level voltage PC1 input current PC2 input current Reset circuit Reset operation release supply voltage VREF detection voltage VRST VR 1.35 5 V V VPC1H VPC1L VPC2H VPC2L IPC1 IPC2 3.5 3.5 70 70 1.0 1.0 120 120 V V V V A A VOOF4 G4+ G4 VL4+ VL4- VDZ4 RS4 = 0.5 RS4 = 0.5 RS4 = 0.5 RS4 = 0.5 RS4 = 0.5 RS4 = 0.5 -60 8.5 -1.0 3.3 -5 10.5 0 3.9 -3.9 15 60 12.5 1.0 -3.3 45 mV dB dB V V mV VOOF3 G3+ G3 VL3+ VL3- VDZ3 RS3 = 0.5 RS3 = 0.5 RS3 = 0.5 RS3 = 0.5 RS3 = 0.5 RS3 = 0.5 -60 8.5 -1.0 3.3 -5 10.5 0 3.9 -3.9 15 60 12.5 1.0 -3.3 45 mV dB dB V V mV VBRK IIN2 IDRV2 VPC1 = 5 V, VPC2 = 0 V, VIN2 = 2.6 V, IO = 200 mA VPC1 = 5 V, VPC2 = 0 V, VIN2 = 5 V VPC2 = 5 V, VIN2 = 2.6 V 0.3 40 1.0 100 1.0 V A A Symbol Conditions Min Typ Max Unit
4
ICs for Compact Disc/CD-ROM Player
AN8783SB
s Electrical Characteristics at SVCC = 12 V, VCC1 = 12 V, VCC2 = 5 V, RL = 8 , VPC1 = 0 V, VPC2 = 5 V, Ta = 25C (continued)
* Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter Thermal protection circuit Thermal protection operating temperature Thermal protection hysteresis width Reset circuit Voltage detection reset hysteresis width
Symbol
Conditions
Min
Typ
Max
Unit C C
TTHD TTHD
160 45
VHYS
0.2
V
s Usage Notes
1. SVCC must be used in the highest potential. Otherwise it possibly causes an operation error. 2. Ch. 3 and ch. 4 are current feedback type drivers. Do not apply voltage directly to PVC3 and PVC4, but apply from PVC2 through the current feedback detection resistors RS3 and RS4 , respectively. And commonly connect S3 pin to PVC3 pin and S4 pin to PVC4 pin. At this time, as an output current flows on the detection resistors RS3 and RS4, use a resistor which has a sufficient allowable power dissipation. RVC2 To set gain for ch. 3 and ch. 4, use the following formula: | VIN3(4) -VREF | x 2.2 k = RS3(4) x IOUT3(4) R3(4) + 500 (IOUT3 and IOUT4 are the load current for ch. 3 and ch. 4, respectively.)
RS3
RS4
S3
PVC3 PVC4
S4
3. Power cut operation Power cut pins PC1 (for ch. 1, ch. 3, ch. 4) and PC2 (only for ch. 2) are high for mute and low for active. While ch. 2 is exclusive to a loading motor, ch. 2, ch. 3 and, ch. 4 are driven by the output current from the same source (PVC2). Therefore, do not use ch. 2 and ch. 3, ch. 4 simultaneously because noise is likely to be put on ch. 3, ch. 4 when ch. 2 is being drived. 4. Appropriate care should be taken on the characteristics. When changing an external circuit constant on actual use, secure an appropriate margin in consideration of characteristic fluctuation of external parts and our ICs including transient characteristics as well as static ones. 5. Avoid the short-circuits between output pin and VCC , output pin and GND (line-to-supply and line-to-ground), and between output pins (load short-circuit). Otherwise, the IC is likely to emit smoke and break down.
5
AN8783SB
s Application Notes
* PD Ta curves of HSOP042-P-0400
ICs for Compact Disc/CD-ROM Player
PD T a
2.500 2.240 2.000
Power dissipation PD (W)
Mounted on standard board (glass epoxy: 75 mm x 75 mm x t1.6 mm) Rth(j-a) = 55.8C/W 1.500
1.042 1.000 Independent IC without a heat sink Rth(j-a) = 119.9C/W 0.500
0.000 0 25 50 75 100 125 150
Ambient temperature Ta (C)
s Application Circuit Example
RL1 RL2
V1
SVCC RAS VIN2 R1 VREF VCC1
Fin
27
26
25
24
23
22
21
20
19
18
17
16 13
RL3
28
Fin
10
11
12
RC1 C1
R3
R4
V3
V4
RS3 RS4 VCC2
RC2 C2 RL4
When the AN8783SB is use, take into account the following cautions and follow the power dissipation characteristic curve. 1. Load current IP1 flowing into load RL1 is supplied through pin 21. IP1 = | V20 -V18 | /RL1 2. Load current IP2 flowing into load RL2 is supplied through pin 16. IP2 = | V17 -V15 | /RL2 3. Load current IP3 flowing into load RL3 is supplied through pin 13 via the resistor RS3. IP3 = | V14 -V12 | /RL3 4. Load current IP4 flowing into load RL4 is supplied through pin 8 via the resistor RS4. IP4 = | V10 -V9 | /RL4
6
14
1
2
3
4
5
6
7
8
9
15
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example (continued)
AN8783SB
5. Dissipation increase (PD) inside the IC (power output stage) caused by loads RL1, RL2, RL3 and RL4 is as follows: | V20 -V18 | | V -V12 | | V14 -V12 | PD = (VCC1 - | V20 -V18 |) x + {VCC2 - (RS3 + RL3) x 14 }x RL1 RL3 RL3 | V17 -V15 | | V10 -V9 | | V10 -V9 | = (VCC2 - | V17 -V15 |) x + {VCC2 - (RS4 + RL4) x }x RL4 RL4 RL2 6. Dissipation increase (PS) inside the IC (signal block supplied from pin 28) caused by loads RL1, RL2, RL3 and RL4 comes roughly as follows: V I PS = 3 x 1 x (2 x SVCC + | V20 -V18 | ) + P2 x (SVCC - | V17 -V15 | ) K R1 IP3 IP4 + x (SVCC - | V14 -V12 | ) + x (SVCC - | V10 -V9 | ), where K 100 7. Dissipation increase in a driver operating mode is PD + PS . 8. Allowable power dissipation without load (PD1) can be found as follows: PD1 = SVCC x I(SVCC) +VCC1 x I(VCC1) + VCC2 x I(VCC2) 9. Allowable power dissipation in a load operating mode (PD) comes roughly as follows: PD = PD1 + PD + PS
7

▲Up To Search▲

Price & Availability of AN8783SB

	To Download AN8783SB Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .