11-MD125 Version : A.01 Issue Date : 2003/06/30 Total Page : 11 2 Channel Low Saturation & Constant Current DC Motor Driver 新竹市展業一路 9 號 4 樓之 3 SILICON TOUCH TECHNOLOGY INC. 9-4F-3, Prosperity Rd I, Science-Based Industrial Park Hsinchu, Taiwan, R.O.C. Fax：886-3-5727390 Tel：886-3-5727171 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. 11-MD125 2 Channel Low Saturation & Constant Current DC Motor Driver General Specifications The 11-MD125 is a 2-channel DC driver with one channel constant current mode (forward, reverse and stand-by function ) and the other channel saturation mode(forward, reverse, brake and stand-by function). The 11-MD125 is specifically designed for DSC lens shutter (constant current) / iris (saturation voltage) or shutter (constant current) / zoom DC motor (saturation voltage), or other portable devices. The constant current can be varied by an external resistor and two constant current level can be selected through input control pin. Its design is optimized for use in camera solenoid coil and DC motor. Features and Benefits Low voltage operation ( VDD Min = VB Min = 2.5V ) Low saturation voltage ( Upper transistor + low transistor residual voltage; 0.4V typ. at 300mA , VDD = VB = 3V) Low input current Constant current control Two constant current level selection Reference Voltage inside (Vref=1.23V) Thermal shutdown protection Thin, highly reliable package (SSOP-20) Pin Assignment 11-MD125_A01.doc IN1 VB2 IN2 SG IN3 PG IN4 VO1 IN5 VO2 IAD IO1 VREF IO2 HO1 IM NC VDD CF VB1 Version：A.01 Page：1 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Pin NO. Pin Name Description 1 IN1 Input pin start constant current mode 2 IN2 Input pin that determines forward/reverse mode 3 IN3 Holding 1 output pin (output current settling) 4 IN4 Input pin that determines DC driving mode 5 IN5 Input pin that determines DC driving mode 6 IAD AMP positive input pin 7 VREF Reference voltage output pin 8 HO1 Holding 1 output pin (output current settling) 9 NC No connection 10 CF Oscillation protech capacitance 11 VB1 Power supply pin for constant current output driver 12 VDD Power supply pin for controller. 13 IM Current sense resistor 14 IO2 Current driving 2 15 IO1 Current driving 1 16 VO2 DC driving 2 17 VO1 DC driving 1 18 PG Driver ground 19 SG Controller ground 20 VB2 Power supply pin for DC output driver Absolute Maximum Ratings ( Unless otherwise noted, TA= 25℃ ) Characteristic Symbol Rating Unit VDD 5.5 V VB 7 V VIN VDD+0.4 V IO Peak Current IOPeak 1.5 A IODC Current IODC 0.45 A Power Dissipation PD 450 mW Operating Temperature Range TOPR -40 ~ 125 °C Storage Temperature Range TSTG -65 ~ 150 °C Supply Voltage Input Voltage 11-MD125_A01.doc Version：A.01 Page：2 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Electrical Characteristic (Unless otherwise noted, TA= 25℃ & VDD = VB = 3V ) Characteristic Sym. Supply Voltage Limit Condition Unit Min. Typ. Max. VDD 2.5 3 5.5 V VB 2.5 3 5.5 V ISTB VIN1, IN4, IN5 =L 0.1 1 μA Supply Current IACT1 VIN1 =H, VIN4, IN5 =L 0.4 1 mA ( IDD ) IACT2 VIN1 =L, VIN4, IN5 ≠L 0.2 1 mA IACT3 VIN1 =H, VIN4, IN5 ≠L 0.5 1 mA Reference Voltage Circuit Reference Voltage Vref 1.19 1.23 1.27 V HO1 Voltage VHO1 1.19 1.23 1.27 V ENA / IN1 / IN2 / IN3 Input Terminal ( TJ = 25℃) Input Voltage “H” VIH - 0.8*VDD - VDD+0.4 V Input Voltage “L” VIL - -0.4 - 0.2*VDD V Input Current “H” IIH VIN = VDD - - ±5 μA Input Current “L” IIL VIN = 0 V - - ±5 μA IO1 / IO2 Output Terminal ( TJ = 25℃) Output Current1 IO1 IAD = 0.3V, RIM = 1Ω 282 300 318 mA Output Current1 IO2 IAD = 0.2V, RIM = 1Ω 188 200 212 mA - 0.4 0.8 V - 0.4 0.8 V Output Voltage (upper + lower) VOUT IOUT = 300 mA VO1 / VO2 Output Terminal ( TJ = 25℃) Output Voltage (upper + lower) VOUT RLoad=10Ω Thermal Protection Circuit Protection Temperature TTSD 11-MD125_A01.doc VIN1 =H, VIN4, IN5 ≠L Version：A.01 160 ℃ Page：3 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Truth Table Constant current driving INPUT OUPUT MODE IN1 IN2 IN3 IO1 IO2 HO1 L OFF OFF OFF STANDBY H/L H H/L L/H ON* Shutter (Current 1)* H H/L L H/L L/H OFF* Shutter (Current 2)* - : Don’t care *HO1 : ON Output voltage=1.23V (= Vref). : OFF Output = Impendence. *The constant current level is dependent on the connections of external resistors RIM, RA, RB and RC in the block diagram. Saturation voltage driving INPUT OUPUT MODE IN4 IN5 VO1 VO2 L L OFF OFF STANDBY L H L H REVERSE H L H L FOWORD H H H H BREAK : If IN1=L, IN4=L and IN5=L, the driver will be shutdown and Vref become high impedence. 11-MD125_A01.doc Version：A.01 Page：4 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Block Diagram VO1 0.1µF 0.1µF M M 17 16 IO1 VO2 15 14 IO2 VB2 11 20 VB1 10µF 10µF 18 PG 13 IM RIM* VDD CF Controller 12 10 103 3300pF 104 19 TSD SG Reference SG Voltage 4 5 IN5 3 IN4 IN3 8 1 2 IN2 IN1 HO1 RC 7 + VREF RA 6 IAD RB *The current value can be justified with VIAD divided by RIM . *When IN3 =L, HO1=High Impedance, VIAD= Vref * RB/(RA+RB), and IOUT = VIAD / RIM. *When IN3 =H, HO1=Vref, VIAD=Vref * RB /[( RA // RC)+ RB] , and IOUT = VIAD / RIM 11-MD125_A01.doc Version：A.01 Page：5 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Application Circuit For one saturation channel and one fixed constant current channel application, the circuit diagram is suggestion as below. VB IN1 IN2 IN4 IN5 RA IN1 VB2 IN2 SG IN3 PG IN4 VO1 IN5 VO2 IAD IO1 VREF IO2 HO1 IM NC VDD CF VB1 10u 0.1u M 0.1u M RIM VDD RB 103 104 3300P * For example, to get constant current output IOUT about 200mA, set RA = 8.2kΩ, RB =1.6kΩ, RIM = 1Ω, thus, VIAD = 1.23/6.125=0.201V and IOUT = 0.201/1 = 201mA. 11-MD125_A01.doc Version：A.01 Page：6 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. For one saturation channel and one constant current channel with two current values application, the circuit diagram is as below. VB IN1 IN2 IN3 IN4 IN5 RC RA IN1 VB2 IN2 SG IN3 PG IN4 VO1 IN5 VO2 IAD IO1 VREF IO2 HO1 IM NC VDD CF VB1 10µF 0.1µF M 0.1µF M RIM VDD RB 0.01µF 0.1µF 3300P * For example, to get two constant current level IOUT about 200mA and 300mA, set RA = 8.2KΩ, RB=1.6KΩ, RC= 13KΩ, RIM= 1Ω. If IN3=L, VIAD = 1.23/6.125=0.201V and IOUT = 0.201/1 = 201mA. If IN3=H, VIAD = 1.23/4.142=0.297V and IOUT = 0.297/1 = 297mA. 11-MD125_A01.doc Version：A.01 Page：7 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Application Notes 1. In multiple power supply application, the voltage of VB1 and VB2 can be used at different value. The power supply VB1 is used for constant current channel and VB2 is used for saturation channel. 2. In constant current mode, Gnd of RIM and PG have better to been connected to Gnd of system power as close as possible, because IOUT is sensitive with VIAD referred to Vref, when large current flowing into SG will result in significant variation of Vref. 3. The power dissipated by the IC varies widely with the supply voltage, the output current, and loading. It is important to ensure the application does not exceed the allowable power dissipation of the IC package. The recommended motor driver power dissipation versus temperature is depicted as follows: Power Dissipation-Temperature Power Dissipation ( mW ) 700 IC PCB 600 500 400 300 200 100 0 0 25 50 75 100 125 Ambient Temperature ( ℃ ) 11-MD125_A01.doc Version：A.01 Page：8 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. Package Specifications (20-pin SSOP ) 11-MD125 C E1 F xxxxxx* θ L D ZD A B A1 e SYMBOL MIN NOM MAX A A1 A2 1.35 0.10 － 1.63 0.15 － 1.75 0.25 1.50 B 0.20 － 0.30 c 0.18 － 0.25 e D E E1 L ZD θ 11-MD125_A01.doc Dimensions in Millimeter 8.56 5.79 3.81 0.41 0° 0.635 BASIC 8.66 5.99 3.91 0.635 1.4732REF － 8.74 6.20 3.99 1.27 8° Version：A.01 Page：9 點晶科技股份有限公司 11-MD125 SILICON TOUCH TECHNOLOGY INC. The products listed herein are designed for ordinary electronic applications, such as electrical appliances, audio-visual equipment, communications devices and so on. Hence, it is advisable that the devices should not be used in medical instruments, surgical implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention equipment and the like. Misusing those products may directly or indirectly endanger human life, or cause injury and property loss. Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage of the products mentioned above. Anyone who purchases any products described herein with the above-mentioned intention or with such misused applications should accept full responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all their officers and employees shall defend jointly and severally against any and all claims and litigation and all damages, cost and expenses associated with such intention and manipulation. 11-MD125_A01.doc Version：A.01 Page：10