Fairchild KA3012D Data Sheet

Summary

This datasheet documents the Fairchild KA3012D 4-channel motor driver IC in a 28-SSOPH-375 package, designed for CD-media systems requiring sled motor, loading motor, focus actuator, and tracking actuator drive. The monolithic BTL (H-bridge type linear) driver achieves a wide dynamic range with 4.2V output at 8Ω load (12V signal/5V power) or 10.4V at 24Ω (12V signal/12V power). A built-in operational amplifier accepts digital servo signals from the CD-media controller. Integrated protection feat

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www.fairchildsemi.com

KA3012D 4-Channel Motor Driver

Features Description BTL (H-Bridge type linear) 4channel motor driver The KA3012D is a monolithic IC, and suitable for 4-CH Wide dynamic range: motor driver which drives sled motor, loading motor, focus SVCC=12V, PVCC1=5V, RL=8Ω → VOM=4.2V & tracking actuator of CD-media system and built in OP-

SVCC=12V, PVCC2=12V, RL=24Ω → VOM=10.4V amp which can receive digital signal from servo of CD- Built in level-shift circuit media system.

Built in OP-amp for digital input Built in thermal shutdown (TSD) circuit Three independent sources Low crossover distortion

28-SSOPH-375

Built-in reverse rotation prevented Built-in short breaker

Typical Applications Ordering Information Compact disk ROM (CD-ROM)

Device Package Operating Temp.

Compact disk RW (CD-RW)

KA3012D-02 28-SSOPH-375 -35 °C ~ 85 °C

Digital video disk ROM (DVD-ROM) Digital video disk RAM (DVD-RAM) KA3012D-02TF 28-SSOPH-375 -35 °C ~ 85 °C Digital video disk player (DVDP) Other compact disk media

Rev. 1.0.1 February. 2000.

Page Summary Contents For Fairchild KA3012D Data Sheet

Page 1 www.fairchildsemi.com KA3012D 4-Channel Motor Driver Features Description BTL (H-Bridge type linear) 4channel motor driver The KA3012D is a monolithic IC, and suitable for 4-CH Wide dynamic range: mot...

Page 2 KA3012D Pin Assignments (GND) AM P1 -O 4- AM P1 -I (− AM P4 -O KA3012D AM P1 -I AM P4 -I (− BI AS AM P4 -I FIN SV PV (GND) TE AM P3 -I AM P2 -I AM P3 -I (− AM P2 -I (− AM P3 -O AM P2 -O 3- 2- DFIN

Page 3 KA3012D Pin Definitions Pin Number Pin Name I/O Pin Function Description CH1-O Drive CH 1 output (−) CH1-O Drive CH 1 output (+) AMP1-O Op-amp CH 1 output AMP1-I(−) Op-amp CH 1 input (−) AMP1-I(+) OP-...

Page 4 KA3012D Internal Block Diagram GND GND +− +− −PVCC2PVCC1 PVCC1/2 PVCC2/2PVCC1/2 AM PVCC2/2 P1 -O 4- 20k 10k 10k LEVEL-SHIFT LEVEL-SHIFT AM P1 -I (− AM P4 -O LEVEL-SHIFT LEVEL-SHIFT +− AM P1 -I AM P4 -...

Page 5 KA3012D Equivalent Circuits Op-amp input Op-amp output AMP-O AMP-I (−)AMP-I (+) 3, 12, 17, 25 Pin Drive output Bias 10kΩ CH-O (2, 13, 17, 26 Pin) Bias (6 Pin) 200Ω CH-O (1, 14, 16, 27 Pin) Mute (9 Pin...

Page 6 KA3012D Absolute Maximum Rating (Ta = 25°C) Parameter Symbol Value Unit Supply voltage VCC Power dissipation PD 1.7note Operating temperature range TOPR −35 ~ +85 °C Storage temperature range TSTG −55...

Page 7 KA3012D Electrical Characteristics (Ta=25°C, VCC1=VCC2=5V, RL=8Ω) Parameter Symbol Conditions Min. Typ. Max. Units DRIVE CIRCUIT Quiescent current 1 ICC1 No load, Mute off m A Quiescent current 2 ICC2...

Page 8 KA3012D Application Information 1. MUTE Pin #9 Mute circuit Output driver High Turn-on bias Low Turn-off Open Turn-off When the voltage level of the mute pin is above 2V, the mute circuit is activated...

Page 9 KA3012D 3. DRIVER Buffer (6 Pin) Level shift Pre-amp AMP-I (+) (5, 10, 20, 23 Pin) CH-O CH-O AMP-I (−) 10k 10k (4, 11, 19, 24 Pin) 16, 27 Pin) 17, 26 Pin) AMP-O −∆I Buffer Q3 Q4 (3, 12, 18, 25 Pin) Th...

Page 10 KA3012D Typical Performance Characteristics ai n1 (d VCC vs ICC (No load) ut pu ol ta ge om 1( VCC (V) AMP-I (+) vs OUTPUT VOLTAGE Figures can be obtained by changing of AMP-I (+) from 0V to 5V, shows...

Page 11 KA3012D Test Circuits RL3 RL3’ RL4 10µF PVCC1 PVCC210µF PI (− PO PI PI (− KA3012D PI )SW1 PI (− PI (− SW2 PO PO RL2 RL2’ 10µFBias 2.5V SVCC VMUTE OPIN (+) OPIN (−) OPOUT VIN2 VIN4

Page 12 KA3012D Typical Application Circuits SERVO PREAMP MICOM LOADING FOCUS TRACKING BIAS SLED (SPINDLE) MUTE GND 10kΩ KA3012D

Page 13 KA3012D DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LI...

Manual Details

Brand	Fairchild
Pages	13
File Size	238.62 KB
Published	July 07, 2026

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Frequently Asked Questions

What temperature range can the KA3012D operate in?

-35 °C to 85 °C (Operating) for CD-RW/KA3012D-02, and -35 °C to 85 °C for CD-ROM/DVD media versions.

Does the driver have protection against unexpected shutdowns?

Yes, it is built with a thermal shutdown (TSD) circuit and includes a built-in short breaker.

What kind of voltage sources does the IC manage?

It utilizes three independent sources: SVCC, PVCC1, and PVCC2.

Is the driver suitable for various CD media types?

Yes, it supports Compact disk ROM (CD-ROM), RW (CD-RW), DVD-ROM, DVD-RAM, and Digital video disk player (DVDP) applications.