AT5668 ETC1 | Alldatasheet
Document overview
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Technical content
Features
˙4 channels of DC motor BTL driver ˙1 channels forward/reverse control DC motor driver ˙Built-in suspension function. ˙Built-in 1-channel OPA. ˙Built-in 1-Channel Comparator. ˙Built-in thermal shutdown circuit. ˙Operating voltage: 4.5V~13.2V
Applications
CD-ROM/DVD-ROM/CD-RW drives DVD player.
Description
The AT5668 is a 5-channel BTL driver IC. Two of them can drive DC mo tors and two can drive coils, such as the focus and tracking actuators of a CD-ROM/DVD-ROM/DVD-Player system, with current feedback. It also built-in one channel bi-direction DC motor driver for Tray. Block Diagram Aimtron reserves the right without notice to change this circuitry and specifications.
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Pin Descriptions Pin No. Pin name Function
1 IN1 CH1(Focus coil) input
2 CP1N Comparator negative input
3 CP1P Comparator positive input
4 IN2 CH2(Sled driver) input
5 CP1O Comparator Output
6 FWD CH5 forward input
7 REV CH5 reverse input
8 VCC1 Power Supply 1
9 OUT5- CH5(Tray driver) output(-)
10 OUT5+ CH5(Tray driver) output(+)
11 OUT2+ CH2(Sled driver) output (+)
12 OUT2- CH2(Sled driver) output (-)
13 OUT1- CH1(Focus coil) output (-)
14 OUT1+ CH1(Focus coil) output (+)
15 OUT4+ CH4(Tracking coil) output (+)
16 OUT4- CH4(Tracking coil) output (-)
17 OUT3+ CH3(Loader) output (+)
18 OUT3- CH3(Loader) output (-)
19 VCC2 Power Supply 2
20 OP2O Error amplifier output
21 VCTL CH5 Speed control input
22 GND Ground
23 IN3 CH3(Loader) input
24 OP2N Error amplifier negative input
25 OP2P Error amplifier positive input
26 IN4- CH4 (Tracking driver) input
27 VBIAS VREF input pin
28 MUTE_1_2_3_4 Mute control for CH1,CH2,CH3,CH4
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw
Ordering Information
Part number Package Marking AT5668H 28-pin HSOP AT5668H Power Dissipation (Ta = 25oC) C o n d i t i o n : m o u n t o n 5 0 x 5 0 m m2 t=1.0mm paper phenol PCB Absolute maximum ratings (Ta = 25oC) Parameter Symbol Limits unit Power supply voltage VCC1,2 13.5 V Power dissipation P d 1.7 W Operating temperature T opr -30~+80 oC Storage temperature T stg -55~+150 oC NOTE:* 1. Power dissipation reduces 13.6mW / °C for using above Ta=25°C 2. Do not exceed Pd and SOA. Recommended operating conditions (Ta = 25oC) Parameter Symbol Limits unit VCC1 4.0~13.2 VPower supply voltage VCC2 4.0~Vcc1 V
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw
Electrical characteristics
(unless otherwise noted, Ta = 25oC,VCC1 =12V , VCC2 =5V , VBIAS=2.5V , RL1= RL4=8Ω, RL2= RL3=12Ω) Parameter Symbol Min. Typ. Max. Unit Conditions Quiescent current I QC -1 8 3 0 m A N o L o a d Mute quiescent current I QSB - - 5 mA CH5 ,OPA,COMP. active Mute ON voltage V SBON 0- 0 . 5 V Mute OFF voltage V SBOFF 2.0 - - V <Track driver> Output voltage offset V OFFSL -100 0 100 mV Maximum output voltage V O3MAX 3.6 4.0 - V VIN = VBIAS ±1.5V Closed loop gain G VSL 18.0 20.0 22.0 dB VIN = VBIAS ±0.2V <Focus driver> Output voltage offset V OFFSL -100 0 100 mV Maximum output voltage V O3MAX 3.6 4.0 - V VIN = VBIAS ±1.5V Closed loop gain G VSL 18.0 20.0 22.0 dB VIN = VBIAS ±0.2V <Sled motor driver> Output voltage offset V OFFSL -100 0 100 mV Maximum output voltage V O3MAX 7.5 9.0 - V VIN = VBIAS ±1.5V Closed loop gain G VSL 18.0 20.0 22.0 dB VIN = VBIAS ±0.2V <Spindle motor driver> Output voltage offset V OFFLD -100 0 100 mV Maximum output voltage V O4max1 7.5 9.0 - V VIN = VBIAS±2.0V Maximum output voltage V O4max2 3.6 4.0 - V VIN = VBIAS ±1.5V VCC1=5V Closed loop gain G VLD 13.5 15.5 17.5 dB VIN = VBIAS ±0.2V Gain error ΔGVLD 012 d B VIN = VBIAS±0.2V <Tray motor driver> Maximum output voltage V O5max1 3.8 - 4.2 V RL5=45Ω, RVCTL=0Ω, VCC1=VCC2=5V Output voltage offset V OFFTR -100 0 100 mV Input high level voltage VIH 2.0 - - V Input low level voltage V IL -- 0 . 8 V <OPA> Input Dynamic Range 0 - VCC1- 1.5V V Output Dynamic Range V O 1 - VCC1- 1.0V VI O =-0.25mA~3mA V oltage Gain GVC 70 - 90 dB Saturation V oltage VS - 0.25 0.4 V IO =3mA Input Offset V Offset -- ±10 mV <Comparator> Input Offset V Offset -- ±10 mV Input Dynamic Range 0 - VCC1- 1.5V V Output Dynamic Range V O 0.25 - VCC1- 1.0V VI O =-0.25mA~3mA Saturation V oltage V S - 0.25 0.4 V I O =4mA
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Tray Motor Driver Fig1. Input Ouput FWD REV OUT5+ OUT5- Status High High Low Low Break High Low High Low Forward Low High Low High Reverse Low Low Open Open Standby Tray Motor Speed Control The amplitude of the output voltage is contro lled by VCTL(pin21). If you want to control differential output voltage of the tray, insert external resistor RVCTL as shown in figure 1.
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Test Circuit
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Typical Curve
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw 5 6 7 8 9 10 11 12 Tray Speed Control(RL=45 ohm) VCTL Maximum Output Voltage(V)
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Application circuit
Preliminary Product Information 5 - C h a n n e l M o t o r D r i v e r f o r D V D / V C D Tel: 886-3-563-0878 http://www.aimtron.com.tw Fax: 886-3-563-0879 Email: service@aimtron.com.tw Package Outlines (units:mm): HSOP-28