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參數資料
| 型號： | OQ8844 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 模擬信號調理 |
| 英文描述： | Digital Servo Driver DSD-2 |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 文件頁數： | 2/16頁 |
| 文件大?。?/td> | 80K |
| 代理商： | OQ8844 |
1995 Nov 27
2
Philips Semiconductors
Product specification
Digital Servo Driver (DSD-2)
OQ8844
FEATURES
Servo functions
1-bit class-D focus actuator driver (3.3
)
1-bit class-D radial actuator driver (3.7
)
1-bit class-D sledge motor driver (2.5
).
Other features
Supply voltage 5 V only
Small package (SOT163-1)
Higher efficiency, compared with conventional drivers,
due to the class-D principle
Built-in digital notch filters for higher efficiency
Enable input for focus and radial driver
Enable input for sledge driver
Differential outputs for all drivers
Separate power supply pins for all drivers.
GENERAL DESCRIPTION
The OQ8844 or Digital Servo Driver 2 (DSD2) consists of
1-bit class-D power drivers, which are specially designed
for digital servo applications. Three such amplifiers are
integrated in one chip, to drive the focus and radial
actuators and the sledge motor of a compact disc optical
system.
The main benefits of using this principle are its higher
efficiency grade compared to conventional analog power
amplifiers, its higher integration level, its differential output
and the fact that only a few external components are
needed. When using these digital power drivers in a digital
servo application, the statement ‘complete digital servo
loop’ becomes more realistic.
QUICK REFERENCE DATA
ORDERING INFORMATION
SYMBOL
PARAMETER
MIN.
TYP.
MAX.
UNIT
V
DDD
V
DD(F)
V
DD(R)
V
DD(S)
I
DDDq
I
DD(F)
I
DD(R)
I
DD(S)
f
i(clk)
P
tot
T
amb
digital supply voltage
supply voltage focus actuator
supply voltage radial actuator
supply voltage sledge actuator
quiescent supply current digital part
supply current focus
supply current radial
supply current sledge
input clock frequency
total power dissipation
operating ambient temperature
4.5
4.5
4.5
4.5
40
126
20
150
4.2336
110
5.5
5.5
5.5
5.5
10
250
250
560
5
+85
V
V
V
V
μ
A
mA
mA
mA
MHz
mW
°
C
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
OQ8844
SO20
plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
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