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| Agamem Technology Inc. PRELIMINARY SERVO MOTOR CONTROLLER INTRODUCTION The AA51880 is a BJT integrated circuit for use in servo motor control applications. The built -in voltage regulato r provides the AA51880 with e xtremely stable output voltage. AA51880 FEATURES Built-in voltage regulator. Larger driving capability. Small outline package. APPLICATIONS Servo motor control. Radio controlled car, boat, airplane. IA products (such as air-condition). BLOCK DIAGRAM EXP1 Output Driver VIN Timing control Voltage Regulator OUT1 OUT2 EXP2 VREG POT CL RT CDB CST FUNCTION DESCRIPTION Timing control block detects the motor position and adjust dead band. Output driver circuit control the servo motor current direction. The voltage regulator supports the application reference voltage. 1 2003-04-24 Agamem Technology Inc. PRELIMINARY SERVO MOTOR CONTROLLER PIN ASSIGNMENT AA51880 RT EXP1 OUT1 NC OUT2 EXP2 CST NC 1 2 3 16 15 14 CT POT VIN GND GND RDB Vcc VREG AA51880 (Top View) 4 5 6 7 8 13 12 11 10 9 PIN DESCRIPTION Pin No 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Symbol RT EXP1 OUT1 NC OUT2 EXP2 CST NC VREG VCC RDB GND GND VIN POT CT Timing Resistor External PNP Transistor 1 output Output Driver 1 No Connection Output Driver 2 External PNP Transistor 2 output Stretcher capacitor No Connection Regulated Voltage output Power pin Error pulse output Ground pin Ground pin Input signal Servo position voltage Timing Capacitor Name & Function 2 2003-04-24 Agamem Technology Inc. PRELIMINARY SERVO MOTOR CONTROLLER RATINGS (Ta=25J , unless otherwise noted) Symbol Vcc Pd Tstg AA51880 Parameter Supply voltage Power dissipation Storage temperature range Conditions Ratings 9 300 -- Unit V mW J 25~125 ELECTRICAL CHARACTERISTICS (Ta=25J and Vcc=4.8V, unless otherwise noted) Symbol ICC VOL VOH IPNP VReg IReg Parameter Operating current Output voltage"L" Output voltage"H" External PNP transistor drive current Regulator output voltage Regulator output current Test comditions When output is OFF When output is ON Load resistor 20 ohm Load resistor 240 ohm Load resistor 240 ohm Load capacitor 0.1F Load resistor 500 ohm Limits Min. Typ. 5 25 0.1 3.5 30 2.3 4 2.45 2.6 Max. 8 28 0.2 Unit mA mA V V mA V mA VOLTAGE REGULATOR OUTPUT VOLTAGE CHARACTERISTIC (Ta=25J) 4 3 VReg 2 1 0 0 2 4 VCC 6 8 3 2003-04-24 Agamem Technology Inc. PRELIMINARY SERVO MOTOR CONTROLLER AA51880 APPLICATION CIRCUIT IC1 AA51880 14 VIN 10 VCC Q2 A695 EX 2 R6 51 [ P1 OUT1 3 OUT2 5 EX 6 P2 R7 51 [ VRE 9 G C8 103 M VR1 5K [ Q1 A695 C7 10U P OTCT R T R DBCST GNDGND 15 16 1 11 7 12 13 R1 R3 470K[ C2 1K [ 0.1U C3 0.1U R4 150K [ C4 C1 R2 C5 [ 0.22U 0.1U 20K 4.7U R7 1K [ 4 2003-04-24 Agamem Technology Inc. PRELIMINARY SERVO MOTOR CONTROLLER n SSOP PACKAGE DIMENSION AA51880 PLAN 5 2003-04-24 |
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