AMM2288 Motor Driver ICs Triple BTL Power Driver AMM2288 The AMM2288 is specially developed for the application of compact disc players and is capable of driving focus, tracking, sled, spindle functions, and loading motor. Applications CD-audio, VCD, and DVD-player Features 1) 2) 3) 4) 5) No external component. Single power supply. Low output offset voltage. ESD protection on all pins. DIP16 package for AMM2288A, SO16 package for AMM2288AT 6) Build-in thermal shutdown 7) Loading driver is current-controlled by external resistor Absolute maximum ratings (Ta=25 ) Parameter Supply voltage Peak output current Symbol Limits Unit VP IORM 16 * 0.5 1.4 (A type) 1.1 (AT type) -40 ~ +85 -55 ~ +150 V A Power dissipation Operate Temp range Storage Temp range Pd Topr Tstg W * For 1 channel output. Quick references for driver 1,2 (Ta=25 ) Parameter Symbol min Supply voltage VP 5 Internal voltage gain GV 14 Quiescent current @ 9V VP IDDQ Slew rate SR typ 15.5 max Unit 14 V 17 dB 24 mA 1 Input current V/us 300 Docu. No.: nA Dec., 2002 V1.0 -1- AMM2288 Motor Driver ICs Electrical characteristics (unless otherwise specified, Ta=25 , VP=9V, RL=8) Parameter Symbol Conditions Min Limit Typ Unit Max Channel 1,2 Supply voltage Output peak current Repetitive output current VP 5 14 V IPEAK 450 mA 320 mA IORM For 1,2 each channel(*1) Total quiescent current IP @ VP = 9V Output voltage swing VOPP 6.5 7.5 GV 14 15.5 17 dB Ibias 100 300 nA BW - 100 KHz - dB Voltage gain Input bias current Bandwidth Power supply rejection ratio PSRR Common mode rejection ratio CMRR Common mode input range VI(COM) @ VP = 5V 36 38 V 100 0 - mA dB VP-3.2 V Channel separation 50 dB Input impedance ZI 100 K Channel unbalance Slew rate |GV| 1 SR dB 1 V/us 200 mA Channel 3 (Loading) For Channel 3, at Rctrl=5.1 Output constant loading current ILC Input High Voltage VIH 2.5 Input Low Voltage VIL 0.8 160 *1. However, due to the power dissipation issue, it is not allowed for both channels to operate at this condition at the same moment. Docu. No.: Dec., 2002 V1.0 -2- AMM2288 Motor Driver ICs Block Diagram vp 4 Positive output 1 Positive input 1 7 9 + Negative input 1 8 Negative output 2 11 Negative output 1 Positive input 2 5 12 + Negative input 2 6 Positive output 2 14 Negative output 3 Positive input 3 2 16 + Negative input 3 3 Positive output 3 15 10 1 13 V PL Docu. No.: Dec., 2002 V1.0 -3- AMM2288 Motor Driver ICs Pin description PIN No Pin Name Function 1 VPL 2 IN3+ Positive input 3 3 IN3- Negative input 3 4 VP 5 IN2+ Positive input 2 6 IN2- Negative input 2 7 IN1+ Positive input 1 8 IN1- Negative input 1 9 OUT1+ Positive output 1 10 GND1 Ground 1 11 OUT1- Negative output 1 12 OUT2- Negative output 2 13 GND2 Ground 2 14 OUT2+ Positive output 2 15 OUT3+ Positive output 3 16 OUT3- Negative output 3 Loading driver current-controlled resistor and power supply Supply voltage for channel 1,2 Docu. No.: Dec., 2002 V1.0 -4- AMM2288 Motor Driver ICs Pin Assignment 1 16 IN3+ 2 15 OUT 3+ IN3- 3 14 OUT2+ VP 4 13 GND IN2+ 5 12 OUT 2- IN2- 6 11 OUT1- IN1+ 7 10 GND IN1- 8 9 OUT1+ AMM2288A VPL OUT3- Package type: DIP16/SO16 J ~ 90K/W (A type) J ~ 112K/W (AT type) Functional description Docu. No.: Dec., 2002 V1.0 -5- AMM2288 Motor Driver ICs The AMM2288 is triple power driver circuits in a BTL configuration, intended for use as a power driver for servo systems with a single supply. It is particularly designed for compact disc players and is capable of driving focus, tracking, sled , spindle functions and loading motors. Because of the BTL configuration, the device can supply bi-directional DC current in the load, with only a single supply voltage. The voltage gain of channel 1,2 is fixed by internal feedback at 15.5dB and the device operate in a supply voltage ranges 5 ~14V. The differential input can handle common mode input voltage from ground level up to VP-3.2V. The maximum output current of loading driver is controlled by an external resistor, which is normally in the range of 6~15 ohms. Docu. No.: Dec., 2002 V1.0 -6- AMM2288 Motor Driver ICs Application information Vp 4 7 D riv er singal 1 9 + + 500 RL 8 S erv o system 5 D riv er signal 2 + 11 - 12 - 500 RL V ref 6 FW D 2 + 14 + 16 M REV 3 15 V PL 10 + 1 13 Vp R CTRL Docu. No.: Dec., 2002 V1.0 -7-