AA51880

AA51880 AGAMEM | Alldatasheet

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Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ■ DESCRIPTION The AA51880 is a BJT integrated circuit using in servo motor control applications. The built-in voltage regulator provides the AA51880 with extremely stable output voltage. It also incorporates a linear one-shot and pulse-width demodulator for improved positional accuracy. ■ FEATURES

• Built-in voltage regulator.
• Larger driving capability.
• Internal output NPN power transistor.
• Adjustable dead band range control.
• Incorporates a protection circuit for "H-Bridge" driving configuration.
• Small outline package. ■ APPLICATIONS
• Servo motor control.
• Radio controlled car, boat, and airplane.
• IA products (such as air-condition).
• Remote positioning. ■ BLOCK DIAGRAM Note: Pin no. is for AA51880C/AA51880F; please refer to “PIN DESCRIPTION” for other package type.

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ■ PIN DESCRIPTION PIN NO. SSOP16 DIP14 PIN NAME FUNCTION 1 14 RT Timing Resistor 2 1 EXP1 External PNP Transistor 1 output 3 3 OUT1 Output Driver 1 5 6 OUT2 Output Driver 2 6 8 EXP2 External PNP Transistor 2 output 7 7 CST Stretcher capacitor 8 12 NC No Connection 9 9 VREG Regulated Voltage output 10 10 VCC Power supply pin 11 5 RDB Error pulse output 4,12,13 4 GND Ground pin

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. PIN NO. SSOP16 DIP14 PIN NAME FUNCTION 14 2 VIN Input signal 15 11 POT Servo position voltage 16 13 CT Timing Capacitor ■ ABSOLUTE MAXIMUM RATINGS Ta=25 ℃ SYMBOL PARAMETER RATINGS UNIT Vcc Supply voltage 4.8~7 V Pd Power dissipation 300 mW Tstg Storage temperature range －25~＋125 ℃ ■ ELECTRICAL CHARACTERISTICS Ta=25 , Vcc=℃ 4.8V LIMITS SYMBOL PARAMETER TEST CONDITIONS MIN TYP MAX UNIT When output is OFF - 5 8 mA ICC Operating current When output is ON - 25 28 mA VOL Output voltage "L" Load resistor 20 Ω - 0.1 0.2 V VOH Output voltage "H" Load resistor 240 Ω 3.5 - - V IPNP External PNP transistor drive current Load resistor 240Ω 30 - - mA VREG Regulator output voltage Load capacitor 0.1uF 2.3 2.45 2.6 V IREG Regulator output current Load resistor 500Ω 4 - - mA

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ■ FUNCTIONAL DESCRIPTION (1) Voltage Regulator This circuit is composed of a band gap circuit, and outputs a 2.45-volt temperature compensated reference voltage. This reference voltage is stabilized when the supply voltage is variable. (2) Saw tooth wave & One-Shot Generator Connect a capacitor to CT pin will generate a triangular wave by constant current charging. A typical value is 0.1uF. The constant current is determined by a resistor connected to RT pin. A typical capacitor of approximately 0.1uF should be connected in parallel with the resistor to increase stability. (3) Servo Position & Over-Time logic This circuitry consists of a pulse width comparator, which compares the servo position detection signal (POT pin) from the one-shot timer (CT pin) whose period depends on the resistance of a potentiometer connected to the servo's drive shaft. This feedback is what provides the stability for the control circuitry. (4) Pulse Stretcher The difference between the servo control signal and the feedback signal is the error signal. This error signal is used to toggle the direction the current flows through the servo. The function of this pulse stretcher is to “stretch” the small error signal long enough and increases the duty cycle to the motor for it can maintain sufficient holding force. The circuit also implements a “dead band” function that prevents servo jitter and hunting. This is a range over which differences between the input and reference signals will not cause servo operation. When the signal differences exceed this “dead band” range, drive to the motor occurs. servo’s drive shaft. The dead band will change according to the value of resistor connected to the RDB pin. (5) Directional Logic Control The comparator circuit compares pulses from the servo control input (VIN pin) and the voltage controlled pulse generator and provides either a positive or a negative output depending on whether the signal pulse width is larger or smaller than the position generator’s output pulse (POT pin). Application of this error voltage to the motor driver circuit causes the motor to turn in a direction that will minimize the error until both pulse widths are the same. (6) PWM Control This signal generated by directional logic control block is used to control a flip-flop that toggles the direction the current flows through the motor. The outputs of the flip-flop drive an H-Bridge output driver block that handles the high current going through the motor. This blocks output will be turned on or off with each input pulse based on the status of the directional logic. The

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. PWM drive techniques provide the benefits of reduced power dissipation, improved servo motor performance and positively affect system efficiency. (7) Output driver The output driver controls the servo current direction. For light load application, the servo can be connected with OUT1 and OUT2 pin only. For heavy load application, the EXP1 and EXP2 pin will be connected to the base of the external PNP transistor. It drives in an H-bridge configuration (The sink NPN drivers are built inside the chip). ■ TYPICAL APPLICATION EXAMPLE A. Mini-Servo Application (No external drivers needed) 20KΩ 0.1uF VREG CST VCC VIN RT POT RDBCT GND EXP1 OUT1 OUT2 EXP2 16 15 11 7 13 0.1uF 0.1uF 1KΩ 0.22uF C8 103pF R4 150KΩ 4.7uF 470KΩ 1KΩ VR1 5KΩ GND GND

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. B. Half H-Bridge application using two external PNP drivers C. Full H-Bridge application using two PNPs and two NPNs

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. D. Full H-Bridge application using two PMOSs and two NMOSs Note: Pin no. is for AA51880C, please refer to “PIN DESCRIPTION” for other package type. ■ ORDERING INFORMATION ORDER NO. PACKAGE PACKING Q’TY MARK CHART AA51880C SSOP 16L TAPE & REEL 2,500ea AA51880F SSOP 16L(FD) TAPE & REEL 2,500ea AA51880P DIP 14L TUBE 25ea AA51880 XXXX C AA51880 XXXX F AA51880 XXXXP

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. ■ PACKAGE DIMENSIONS NOTE 1. PACKAGE BODY SIZES EXCLUDE MOLD FLASH PROTRUSIONS OR GATE BURRS 2. DIMENSION L IS MEASURED IN GAGE PLANE 3. TOLERANCE +/- 0.1 mm UNLESS OTHERWISE SPECIFIED 4. CONTROLLING DIMENSION IS MILLIMETER. CONVERTED INCH DIMENSIONS ARE NOT NECESSARILY EXACT. 5. FOLLOWED FROM JEDEC MO-137 0.25---0.10A1 --- 3.80 --- 0.40 5.80 4.80 0.19 0.20 --- y theta D e L E b C 0.10--- --- 8° --- 0.64 --- --- --- --- 0.25 1.45 5.00 --- 1.27 4.00 6.20 0.30 0.25 --- DIMENSIONS IN MILLIMETERS 1.35 MIN SYMBOLS A1 . 6 0 NOM MAX 1.75 0.010---0.004 --- 0.150 --- 0.016 0.228 0.189 0.007 0.008 --- 0.004--- --- 8° --- 0.025 --- --- --- --- 0.010 0.057 0.197 --- 0.050 0.157 0.244 0.012 0.010 --- DIMENSIONS IN INCHES 0.053 MIN 0.064 NOM MAX 0.069 D theta 12°(4X) be C 16-pin Plastic SSOP

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.

Agamem Microelectronics Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER ©Copyright Agamem Microelectronics Inc. www.agamem.com.tw 2 0 0 8 / 4 / 2 2 AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. AGAMEM DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCTS OR CIRCUIT DESRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. 14-pin DIP SYMBOLS MIN. NOR. MAX. A --- --- 0.210 A1 0.015 --- --- A2 0.125 0.130 0.135 D 0.735 0.750 0.775 E 0.300 BSC. E1 0.245 0.250 0.255 L 0.115 0.130 0.150 eB 0.335 0.355 0.375 θ 0 7 15 UNIT : INCH NOTES: 1. JEDEC OUTLINE : MS-001 AA 2. “D”, “E1” DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.010 INCH. 3. e B IS MEASURED AT THE LEAD TIPS WITH THE LEADS UNCONSTRAINED. 4. POINTED OR ROUNDED LEAD TIPS ARE PREFERRED TO EASE INSERTION. 5. DISTANCE BETWEEN LEADS INCLUDING DAM BAR PROTRUSIONS TO BE 0.005 INCH MININUM. DATUM PLANE “H” COINCIDENT WITH THE BOTTOM OF LEAD WHERE LEAD EXITS BODY. ■ NOTES ON USE

• The application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design.
• Application circuit diagrams and circuit constants contained herein are shown as examples of standard use and operation. Please pay careful attention to the peripheral conditions when designing circuits and deciding upon circuit constants in the set.
• Take account of common impedance when designing the earth line on a printed wiring board.