KA3021D Fairchild Semiconductor, KA3021D Datasheet
KA3021D
Specifications of KA3021D
Available stocks
Related parts for KA3021D
KA3021D Summary of contents
Page 1
... Other compact disk media ©2000 Fairchild Semiconductor International www.fairchildsemi.com Description The KA3021D is a monolithic IC, suitable for a 1-ch (For- ward.reverse) control DC motor driver and a 3-ch motor driver which drives the focus actuator, tracking actuator, and sled motor of a CD-media system. 28-SSOPH-375 ...
Page 2
... Pin Assignments GND KA3021D GND 2 KA3021D ...
Page 3
... KA3021D Pin Definitions Pin Number Pin Name 1 DO1 2 DO1+ 3 IN1 4 IN1.1 5 OPIN+ 6 OPIN 7 MUTE1 GND 9 OPOUT 10 VCC2 DO2+ 13 DO2 14 GND 15 REV 16 FWD 17 DO3 18 DO3+ 19 CTL 20 IN3 21 VCC3 22 VCC1 23 REF 24 IN4.1 25 IN4 26 DO4+ 27 DO4 28 GND I/O Pin Function Description O Drive1 output ( ) O Drive1 output (+) ...
Page 4
... Internal Block Diagram 10k D D TSD + 10k 10k CC3 CC1 10k 10k + 15k + + MUTE1 MSC + V CC2 KA3021D 15 14 ...
Page 5
... KA3021D Equivalent Circuits Mute input 50k 7 50 50k Signal reference input 23 50 0.2k Loading logic input 30k 30k Power output loading control input 50k 19 50 50k ...
Page 6
... Power Dissipation Curve Pd (mW) 3,000 2,000 1,000 SOA Recommended Operating Conditions ( Parameter Supply voltage Symbol V CCmax OPR T STG 1mm PCB (Phenolic resin material 100 125 150 175 Symbol Min V 4 KA3021D Value Unit 18 V note 1 + +150 C Ambient temperature Typ Max Unit - 13.2 V ...
Page 7
... KA3021D Electrical Characteristics (Unless otherwise specified, Ta= Parameter Quiescent current Mute on current Mute on voltage Mute off voltage DRIVE CIRCUIT Output offset voltage Maximum output voltage1 (High level) Maximum output voltage2 (Low level) Closed loop voltage gain1 Closed loop voltage gain2 Ripple rejection ratio ...
Page 8
... If the chip temperature rises above 175 C, the thermal shutdown (TSD) circuit is activated and the output circuit is in the mute state, that is off state. The thermal shutdown(TSD) circuit has a temperature hysteresis Below 1V Mute function operation Above 1.4V Normal operation 8 KA3021D =8.5V. CC ...
Page 9
... KA3021D 3. FOCUS, TRACKING ACTUATOR, SLED MOTOR DRIVE PART • The reference voltage REF is given externally through pin 23. • The input signal,pin3,20.25 is amplified times and then fed to the level shift circuit. • The level shift circuit produces the differential output voltages and drives the two output power amplifiers. Since the differential gain of the output amplifiers is equal R3), input signal is amplified by ( R3) ...
Page 10
... The motor speed is proportional to the differential voltage between the pin12 (DO2+) and the pin13 (DO2 ). - By applying the voltage to the pin19 of CTL, the motor speed can be controlled and it is linearly proportional to the applied control voltage. - Motor torque is maximum when pin 19 is open. REV DO2 KA3021D Output DO2 State Vr Brake L Forward H Reverse Vr Brake ...
Page 11
... KA3021D Typical Application Circuits FOCUS ACTUATOR SERVO FOCUS AMP TRACKING SLED TRAY MOTOR 1 DO1 2 DO1+ 3 IN1 4 IN1.1 IN4.1 5 OPIN+ IN3 6 OPIN 1,4CH MUTE 7 MUTE1,4 KA3021D 8 GND 9 OPTPUT 10 VCC2 12V DO2+ 13 DO2 14 GND 11 GND 28 27 DO4 TRACKING ACTUATOR 26 DO4+ 25 IN4 24 IN4.1 REF(typically 1.675V) ...
Page 12
... KA3021D 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 LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ...