cmi

Capella Microsystems Inc.

3777 Stevens Creek Blvd., Suite 320

Santa Clara, CA 95051-7364 U.S.A

Tel: (408) 260-3400

FAX: (408) 248-3416

CONFIDENTIAL

CMI8800 Single/Three Phase

Spindle Motor Controller/Driver IC

For DVD/CD-ROM

PRELIMINARY DATA SHEET

Revision 3.0

07/09/99

This preliminary data sheet indicates that this product is still in the design cycle. All specifications

are based on design goals only. Capella Microsystems Inc. assumes no responsibility for the use of this
product.

Capella Microsystems Inc. reserves the right to make changes in specifications or discontinue

this product at any time without notice. Please contact Capella Microsystems Inc. for possible updates
before starting a design.

Capella Microsystems Inc. products are not designed for use in life support applications. Any

parties who use these products in such applications do so at their own risk and agree to fully indemnify
Capella Microsystems Inc. for any damages resulting from such improper usage or sale.

cmi

3777 Stevens Creek Blvd., Suite 320

Santa Clara, CA 95051-7364 U.S.A

Tel: (408) 260-3400

FAX: (408) 248-3416

CONFIDENTIAL

GENERAL DESCRIPTION

The CMI8800 is a spindle motor

controller/ driver IC designed for DVD/CD-ROM
and Video CD (VCD) applications. This chip can
be used to control/drive single phase spindle
motors (see Page 20, Figure 17 for the
CMI8800 Application example) as well as
conventional three phase spindle motors. It
contains all of the necessary functional blocks
such as the hall bias generator, hall amplifier,
current limit amplifier, thermal shutdown, anti-
reverse protection, short brake, H-bridge power
driver and other functional blocks required for
motor controller/driver ICs (see Page 4, Figure 2
for the CMI8800 Simplified Block Diagram).

FEATURES

Brushless DC motor controller/driver IC

dedicated for DVD/CD-ROM and Video-CD
(VCD) spindle motor applications

Can drive both single phase spindle motors

as well as conventional three phase spindle
motors

Built-in hall bias generator and hall

amplifiers for easy interface with hall sensor
devices

Built-in sleep or start/stop mode to put the

chip and motor into sleep mode for power
saving

Built-in current limit amplifier to limit the

maximum allowed current into the motor
coil

Built-in thermal shutdown for overheat

protection

Built-in torque control to setup the motor's

torque according to the control voltage
applied to the EC and ECR pins

Built-in anti-reverse protection circuitry to

prevent the motor from going into the
opposite (reverse) rotation direction in the
constant linear velocity (CLV) operating
mode (used when the rotation speed is
decreased from the inner track to the outer
track)

Built-in frequency generator (FG) output as

well as rotation detect (FR) output circuitry

Built-in short brake circuitry to short all of

the motor coils and stop the motor quickly

Compatible with 3.3V digital signal

processor (DSP) interface

APPLICATIONS

DVD-DRIVES

CD-DRIVES

Absolute Maximum Ratings

(Ta = 25

°
°

Description

Symbol

Value

Unit

Power Supply for Internal Core

VCCI

Power Supply for Motor Driver

VCCM1/VCCM2

Maximum Power Dissipation

1700*

Storage Temperature

Tstg

-55 ~ 150

Operating Temperature

Topr

-20 ~ 75

Maximum Output Current

Iout

1300

Hall Bias Current

IHB

* 13.6mW/

C Derating for Operating Temperature > 25

(see Page 19, Figure 16 for the Derating Curve)

Recommended Power Supply Range

Description

Symbol

Value

Unit

Power Supply for Internal Core

VCCI

4.25 ~ 5.5

Power Supply for Motor Driver

VCCM1/VCCM2

3.0 ~ 15

cmi

3777 Stevens Creek Blvd., Suite 320

Santa Clara, CA 95051-7364 U.S.A

Tel: (408) 260-3400

FAX: (408) 248-3416

CONFIDENTIAL

H3+

H3-

ECR

CNF

Hall Bias

Generator

H3+

H3-

MUX

In case of

Single Phase

H2+

H2-

Hall

Amp

GND

H1+

H1-

Hall

Amp

Hall

Amp

Hysteresis
Comp

H1+

H1-

H3+

H3-

Hysteresis
Comp

H2+

H2-

RNF

VCCM1

VCCM2

VCCI

PS~

Torque

Limit

VCCI

CLK

Communication

Control Logic

LDIN

LDOT

1P/3P~

Logic

Thermal

Shutdown

Torque

Sense Amp

Current

Limit Amp

Analog

Mux

Single Phase Motor -

Signal Processing

Circuitry

H-Bridge

Power

Driver

1P/3P~

Figure 2: CMI8800 Simplified Block Diagram

cmi

3777 Stevens Creek Blvd., Suite 320

Santa Clara, CA 95051-7364 U.S.A

Tel: (408) 260-3400

FAX: (408) 248-3416

CONFIDENTIAL

Pin Description

Pin #

Pin Name

Pin Description

LDIN

Input for the External Lead Network (for Single Phase Motor)
This Pin is left open for three phase motor applications

H-Bridge Power Driver Output (W)

LDOT

Output of External Lead Network (for Single Phase Motor)
This pin must be left open for three phase motor applications

H-Bridge Power Driver Output (V), NC for Single Phase Mode

No Connection [This pin must be left open]

H-Bridge Power Driver Output (U)

GND

Common Ground

H1+

Hall Amplifier #1 Positive Input

H1-

Hall Amplifier #1 Negative Input

H2+

Hall Amplifier #2 Positive Input

H2-

Hall Amplifier #2 Negative Input

H3+

Hall Amplifier #3 Positive Input

H3-

Hall Amplifier #3 Negative Input

Hall Bias Generator Output (Open Collector Output)

Brake Mode Control, High = Break Mode

CNF

Charge Pump Capacitor Between this Pin and Ground

Short Brake Control Pin, High = Short Brake Mode

1P/3P~

Single Phase (1P)/Three Phase (3P) Control Pin
High = Single Phase. Default = Three Phase = Low

Rotation Detection Pin

ECR

Reference Voltage to Torque Sense Amplifier

Torque Control Input Terminal

PS~

Power Save or Sleep Mode Control
(Logic Low: Power Save or Sleeping Mode)

FG Signal Output Pin

VCCI

5V Power Supply for Internal Core Circuitry

VCCM2

12V Power Supply for H-Bridge Motor (Power) Driver

VCCM1

12V Power Supply for Internal Core Circuitry

RNF

Motor Current Sense Resistor

Note: FIN

GND

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