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AN8813 Datasheet(PDF) 5 Page - Panasonic Semiconductor

Part # AN8813
Description  4-channel driver IC for optical disk drive
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Manufacturer  PANASONIC [Panasonic Semiconductor]
Direct Link  http://www.panasonic.com/industrial/
Logo PANASONIC - Panasonic Semiconductor

AN8813 Datasheet(HTML) 5 Page - Panasonic Semiconductor

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ICs for Compact Disc/CD-ROM Player
AN8813NSB
5
s Application Circuit Example
V2
V4
V3
V1
R3
R2
R1
RL1
RL2
RL4
RL3
PVCC1
PVCC2
VREF
SVCC
5 V
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 =
| V
18 −V17 |
+
| V
16 −V15 |
RL1
RL2
2. Load current IP2 flowing into load RL3, RL4 is supplied through pin 9.
IP2 =
| V
14 −V13 |
+
| V
12 −V11 |
RL3
RL4
3. Dissipation increase (
∆P
D) inside the IC (power output stage) caused by loads RL1, RL2, RL3 and RL4 is as follows:
∆P
D = (PVCC1 − | V18 −V17 |) ×
| V
18 −V17 |
+ (PV
CC1 − | V16 − V15 |) +
| V
16 −V15 |
RL1
RL2
= (PV
CC2 − | V14 −V13 |) ×
| V
14 −V13 |
+ (PV
CC2 − | V12 − V11 |) ×
| V
12 −V11 |
RL3
RL4
4. Dissipation increase (
∆P
S) inside the IC (signal block supplied from pin 7) caused by loads RL1, RL2, RL3 and RL4
comes roughly as follows:
∆P
S = 3 × {
V1 × (2 × SV
CC + | V18 −V17 |) +
V2 × (2 × SV
CC + | V16 −V15 |)
R1
R2
+
V3 × (2 × SV
CC + | V14 −V13 |)} +
V4 × (3 × SV
CC + | V12 −V11 |), where R4: Internal resistor 12.3 kΩ
R3
R4
5. Dissipation increase in a driver operating mode is
∆P
D + ∆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


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