AN8787NSB Datasheet, PDF (6/7 Pages) Panasonic Semiconductor – 4-channel linear driver IC for CD/CD-ROM drive

AN8787NSB
ICs for Compact Disc/CD-ROM Player
s Application Notes
• P_D  T_a curves of HSOP042-P-0400
P_D  T_a
3 000
2 800
R_th(j−c) = 16°C/W
2 600
2 561
2 400
2 200
2 000
Glass epoxy both side copper foil PCB
(75 mm × 75 mm × t1.6 mm)
Rth(j-a) = 48.8°C/W
PD = 2 561 mW (25°C)
1 800
1 600
1 400
1 200
1 120
1 000
800
600
400
Independent IC
without a heat shink
Rth(j-a) = 111.6°C/W
PD = 1 120 mW (25°C)
200
0
0
25
50
75
100
125 150
Ambient temperature T_a (°C)
s Application Circuit Example
RAS
SV_CC
V_IN2
V₁
R1
V_REF
RL1
V_CC1
RL2
V_CC2
RC3
C3 ^{R3 R4}
RC4
V₃
RS3 RS4
V_{4 VCC3}
C4
RL4
RL3
When the AN8787NSB is use, take into account the following cautions and follow the power dissipation characteristic curve.
1. Load current I_P1 flowing into load RL1 is supplied through pin 21.
I_P1
=
|
V₂₀ −V₁₈
R_L1
|
2. Load current I_P2 flowing into load RL2 is supplied through pin 16.
I_P2
=
|
V₁₇ −V₁₅
R_L2
|
6