The AM5890S is a five-channel BTL driver IC for driving the motors and actuators such as those used in the DVD players and consists of two independent precision voltage regulators with adjustable range from 1.25V to 4 V. In addition, an under-voltage detection circuit is built to do Resetting Function. Also, Package is Pb-free for environmental protection.
Two channels are voltage-type BTL drivers for actuators of tracking and focus. Two channels are voltage-type BTL drivers for sled and spindle motors. It also built-in one-channel bi-direction DC motor driver for the tray.
Wide dynamic range [9.0V (typ.) when Vcc1= Vcc2= 12V, at RL= 20Ω load].
Separating the power of Vcc1 and Vcc2 is to improve power efficiency by a low supply voltage for tracking, focus, and spindle.
Level shift circuit built-in.
Thermal shutdown circuit built-in.
Mute mode is built-in.
Dual actuator drivers: A general-purpose input OP provides differential input for signal addition. The output structure is two-power OPAMPS in a bridge configuration.
Sled motor driver: A general-purpose input OP provides differential input for signal addition. The output structure is one power OPAMP in a bridge configuration.
Spindle driver: Single input linear BTL driver. The output structure is two power OPAMPS in a bridge configuration.
Tray-in-out driver: The DC motor driver supports forward/reverse control for the tray motor.
2 Built-in regulator controllers: Adjustable range 1.25V ~ 4V
Under voltage detection
AM5890S Absolute maximum ratings (Ta=25°C)
Parameter
Symbol
Limits
Unit
Supply voltage
Vcc1 Vcc2 VccD
13.5
V
Power dissipation
Pd
*1.7
W
Operate Temp range
Topr
-35 ~ +85
℃
Storage Temp range
Tstg
**-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
AM5890S Pinout
Pin Definitions
PIN No
Pin Name
Pin Description
1
VINFC
Input for focus driver
2
TRB_1
Regulator voltage output, connect to the external transistor collector
3
REGO2
Regulator voltage output, connect to external transistor collector
4
VINSL+
Input for the sled driver
5
REGO1
The speed control input of tray driver
6
FWD
Tray driver forward input
7
REV
Tray driver reverse input
8
Vcc1
Vcc for pre-drive block and power block of sled and tray
9
VOTR-
Tray driver output (-)
10
VOTR+
Tray driver output (+)
11
VOSL+
Sled driver output (+)
12
VOSL-
Sled driver output (-)
13
VOFC-
Focus driver output (-)
14
VOFC+
Focus driver output (+)
15
VOTK+
Tracking driver output (+)
16
VOTK-
Tracking driver output (-)
17
VOLD+
Spindle driver output (+)
18
VOLD-
Spindle driver output (-)
19
Vcc2
Vcc for power block of the spindle, tracking, and focus
20
VCCD
Inpu for voltage detection
21
VCTL
Connect to the external transistor base
22
GND
Ground
23
VINLD
Input for spindle driver
24
RSET
Output for voltage detection
25
TRB_2
Connect to external transistor base
26
VINTK
Input for tracking driver
27
BIAS
Input for reference voltage
28
MUTE
Input for mute control
Applications
BTL driver for CD, CD-ROM, and DVD
AM5890S Datasheet
Download the AM5890S IC Datasheet from the link given below.
