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PDF AN8787NSB Data sheet ( Hoja de datos )
| Número de pieza | AN8787NSB | |
| Descripción | 4-channel linear driver IC for CD/CD-ROM drive | |
| Fabricantes | Panasonic Semiconductor | |
| Logotipo |  |
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ICs for Compact Disc/CD-ROM Player
AN8787NSB
4-channel linear driver IC for CD/CD-ROM drive
s Overview
The AN8787NSB is a 4-channel driver IC that
has 2-channel of H-bridge method actuator driver
with current feedback, one channel of BTL type
traverse driver and one channel of tri-state output
type loading driver. It is optimum for actuator or
motor driver of CD/CD-ROM player. It comes with
a surface mount package that excels in heat radiat-
ing characteristic.
s Features
• Little phase delay due to current feedback method
(2-channel for actuator)
• Channels for loading motor (H-bridge system) are
available for three modes of forward rotation, re-
verse rotation and braking
• Muting SW with 2 modes: A loading channel is in
operation, and the other 3 channels are in muting;
Loading is in muting and the other 3 channels are
in operation.
• Standby switch to stop all functions
• Wide output dynamic range is available regard-
less of a reference power source on the system.
• I/O gain setting by an external resistor
• Thermal shut-down circuit built-in (with hyster-
esis)
s Applications
• 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
Unit: mm
(1.315)
0° to 10°
0.65±0.20
1
1 page  
ICs for Compact Disc/CD-ROM Player
AN8787NSB
s Electrical Characteristics at SVCC = VCC1 = VCC2 = 12 V, VCC3 = 5 V, RL = 8 Ω, VPC = 5 V, VSTB = 5 V,
Ta = 25°C (continued)
Parameter
Symbol
Conditions
Min Typ Max Unit
Reset circuit
Reset operation release supply
voltage
VRST
5
V
VREF detection voltage
VR
1.35
V
• Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter
Symbol
Conditions
Min Typ
Thermal protection circuit
Thermal protection operating
temperature
TTHD
160
Thermal protection hysteresis
width
∆TTHD
45
Reset circuit
Voltage detection reset
hysteresis width
VHYS
0.2
Max
Unit
°C
°C
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
PVC5 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.
To set gain for ch. 3 and ch. 4, use the following formula:
RVC5
| VIN3(4) −VREF |
R3(4) + 500 Ω
× 2.2 kΩ = RS3(4) × IOUT3(4)
(IOUT3 and IOUT4 are the load current for ch. 3 and ch. 4, respectively.)
3. Power cut operation
RS3 RS4
S3 PVC3 PVC4 S4
PC Standby
Low (open)
High
Low High (open)
Ch. 1, Ch. 3, Ch. 4
Ch. 2
(exclusive for L0)
Mute
Active
Active
Mute
Standby
Active
or
Mute
4. Do not use ch. 2 (exclusive for loading) at more than 6 V of VCC2 when ch. 2 load is 20 Ω and less.
5. 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.
6. Avoid the short-circuits between output pin and VCC , output pin and GND (line-to-supply and line-to-ground), and
between output pins (short-circuit due to load). Otherwise, the IC is likely to emit smoke and break down.
7. An appropriate prior study should be done for use of dip soldering.
5
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| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet AN8787NSB.PDF ] | |
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