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PDF AN8814SB Data sheet ( Hoja de datos )
| Número de pieza | AN8814SB | |
| Descripción | 4-channel driver IC for optical disk drive | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for Compact Disc/CD-ROM Player
AN8814SB
4-channel driver IC for optical disk drive
s Overview
The AN8814SB is a BTL system 4-channel
driver and is encapsulated in the SMD package
which excels in heat radiation characteristic.
s Features
• Wide output dynamic range regardless of refer-
ence voltage of the system
• Driver I/O gain setting is possible with an addi-
tional external resistor
• 3.3 V supply voltage is available due to an exter-
nal PNP-tr.
• Additional OP-amp. built-in
s Applications
• MD, CD/CD-ROM drive
• DVD/DVD-ROM drive
18.4±0.2
(5.15)
(4.8)
28 22
21 15
17
8 14
(1.2)
(6.4)
0.8
0.35+–00..0150
Seating plane
HSOP042-P-0400
s Block Diagram
Unit: mm
(1.315)
0° to 10°
0.65±0.20
21
1
2
PVCC
6
4
VCC 5
1
Direction
detector
2 3.3 V
reg.
Direction
detector
Direction
detector
Direction
detector
1
2
PVCC
8
VCC
detector
7 VCC
Thermal
protection
circuit
Fin
GND
22 VREF
1
1 page  
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
VREF
V4 V3
V2
V1
PVCC1
AN8814SB
RL1 RL2
SVCC
PVCC2
RL4 RL3
When the AN8814SB is use, take into account the following cautions and follow the power dissipation characteristic curve.
1. Load current IP1 flowing into load RL1, RL2 is supplied through pin 20.
IP1
=
|
V18 −V17
RL1
|
+
| V16 −V15 |
RL2
2. Load current IP2 flowing into load RL3, RL4 is supplied through pin 9.
IP2
=
|
V14 −V13
RL3
|
+
| V12 −V11 |
RL4
3. Dissipation increase (∆PD) inside the IC (power output stage) caused by loads RL1, RL2, RL3 and RL4 is as follows:
∆PD = (PVCC1 − | V18 −V17 |) ×
| V18 −V17 |
RL1
+
(PVCC1
−
|
V16
−
V15
|)
+
|
V16 −V15
RL2
|
= (PVCC2 − | V14 −V13 |) ×
| V14 −V13 |
RL3
+
(PVCC2
−
|
V12
−
V11
|)
×
|
V12 −V11
RL4
|
4. Dissipation increase (∆PS) inside the IC (signal block supplied from pin 7) caused by loads RL1, RL2, RL3 and RL4
comes roughly as follows:
∆PS
=
3
×
{
V1
R1
×
(2
×
SVCC +
|
V18
−V17
|)
+
V2
R2
×
(2
×
SVCC
+
|
V16
−V15
|)
+
V3
R3
×
(2
×
SVCC
+
|
V14
−V13
|)
+
V4
R4
× (2 × SVCC + | V12 −V11 |)}
5. Dissipation increase in a driver operating mode is ∆PD + ∆PS .
6. Allowable power dissipation without load (PD1) can be found as follows:
PD1 = SVCC × ISVCC + PVCC1 × IPVCC1 + PVCC2 × IPVCC2
7. Allowable power dissipation in a load operating mode (PD) comes roughly as follows:
PD = PD1 + ∆PD + ∆PS
5
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet AN8814SB.PDF ] | |
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