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PDF AN8813 Data sheet ( Hoja de datos )
| Número de pieza | AN8813 | |
| Descripción | 4-channel driver IC for optical disk drive | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for Compact Disc/CD-ROM Player
AN8813NSB
4-channel driver IC for optical disk drive
s Overview
The AN8813NSB is a 4-channel driver IC of the
BTL method. Ch.1 is used only for the loading
motor with little gain dispersion.
s Features
• For the loading motor channel, there are 4 modes,
that is, forward rotation, reverse rotation, brake
and standby modes, and you can select a mode
among them. The gain of it is fixed to 6 dB (±0.5
dB) with a small dispersion among the products.
• 3.3 V supply voltage is available due to an exter-
nal PNP-tr.
• Driver I/O gain setting is possible with an addi-
tional external resistor
• Since the output and input lines are separated and
respectively collected together, pattern designing
is relatively easy.
s Applications
• CD/CD-ROM drive
• DVD/DVD-ROM drive
s Block Diagram
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
Unit: mm
(1.315)
0° to 10°
0.65±0.20
21
1
2
PVCC
22
24
23 Direction Direction Direction Direction
detector detector detector changeover
1
2 3.3 V
reg.
1
2
PVCC
8
SVCC
detector
7 SVCC
Thermal
protection
circuit
Fin GND
28 VREF
Decoder
1
1 page  
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
VREF
V3 V2 V1
R3 R2 R1
PVCC1
AN8813NSB
RL1 RL2
5V
V4
SVCC
PVCC2
RL4 RL3
When the AN8813NSB 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
×
(3
×
SVCC
+
|
V12
−V11
|),
where
R4:
Internal
resistor
12.3
kΩ
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 × I(SVCC) +PVCC1 × I(PVCC1) + PVCC2 × I(PVCC2)
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 AN8813.PDF ] | |
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