AM5868 Motor Driver ICs
5-channel BTL Driver for DVD player AM5868
The AM5868 is a five-channel BTL driver IC for driving the motors and actuators such as used in DVD player and consists of two independent precision voltage comparators. It supports a variety of applications.
z Applications
BTL driver for CD, CD-ROM and DVD.
z Features
1) Two comparators built-in: Two general-purpose voltage comparators are built-in.
2) Two channels are voltage-type BTL drivers for actuators of tracking and focus. Two channels are voltage-type BTL driver for sled and spindle motors. It is also built-in one channel bi-direction DC motor driver for tray.
3) Wide dynamic range [9.0V (typ.) when Vcc1= Vcc2= 12V, at RL=8Ω load].
4) Separating power of Vcc1 and Vcc2 is to improve power efficiency by a low supply voltage for tracking, focus, and spindle.
5) Level shift circuit built-in. 6) Thermal shut down circuit built-in. 7) Mute mode built-in.
8) Dual actuator drivers: A general purpose input OP provides differential input for signal addition. The output structure is two power OPAMPS in bridge configuration.
9) Sled motor driver: A general purpose input OP provides differential input for signal addition. The output structure is one power OPAMP in bridge configuration.
10) Spindle driver: Single input linear BTL driver. The output structure are two power OPAMPS in bridge configuration.
11) Tray in-out driver: The DC motor driver supports forward/reverse control for tray motor.
AMtek semiconductors
-0-
May 2003 V0.7
AM5868 Motor Driver ICs
z Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Supply voltage
Power dissipation Operate Temp range Storage Temp range
Vcc1 Vcc2
Pd Topr
Tstg
13.5
*1.7 -35 ~ +85 **-55 ~ +150
*When mounted on a 70mm × 70mm × 1.6mm glass epoxy board.
*Reduced by 13.6mW for each increase in Ta of 1℃ over 25℃. **Should not exceed Pd or ASO and Tj=150 ° C values
z Guaranteed operating conditions (Ta=25°C)
Parameter Power supply voltage
z Block diagram
Symbol Vcc1 Vcc2
Limits 4.3 ~ 13.2 4.3 ~ Vcc1
Unit V W ℃ ℃
Unit V V
AMtek semiconductors
-0-
May 2003 V0.7
AM5868 Motor Driver ICs
z Electrical characteristics
( Unless otherwise specified Ta=25℃, Vcc1=12V, Vcc2=5V, BIAS=2.5V, RL=8Ω/10Ω/45Ω)
Parameter
Quiescent current Voltage for mute ON Voltage for mute OFF
Output offset voltage Maximum output voltage Voltage gain
Symbol
Icc Vston Vstoff
Min
0 2.0
Limit Typ 30
-
Unit Max
- mA 0.5 V 5V
Conditions
Voo -
- ± 5 0 mV
Vom 3.6 4.0 - V @10ΩLoad
Gv - 20 - dB VIN=BIAS+0.2Vpp ac @1KHz
Output offset voltage Maximum output voltage Closed loop voltage gain
Voofsl Vomsl Gvsl
7.5 18
- ± 1 00 mV 9.0 - V @8Ω Load 20 22 dB VIN=BIAS+0.2Vpp ac @1KHz
Output offset voltage Maximum output voltage Voltage gain Gain error by polarity
Voofld
-
- ± 5 0 mV
Vomax 3.6
4.0
-
V @8Ω Load
Gvld 13.3 15.5 17.5 dB VIN=BIAS+0.2Vpp ac @1KHz
ΔGvld
0
1
2 dB VIN=BIAS+.