PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
■ 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.
©Copyright Agamem Microelectronics Inc.
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www.agamem.com.tw 2008/4/22
AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
■ PIN DESCRIPTION
PIN NO. SSOP16 DIP14 Resistor 1 14 RT Timing 2 1 EXP1
External PNP Transistor 1 output
PIN NAME
FUNCTION
Driver 1 3 3 OUT1 Output Driver 2 5 6 OUT2 Output 6 8 EXP2
External PNP Transistor 2 output
capacitor 7 7 CST Stretcher Connection 8 12 NC No 9 9 VREG 10 10 VCC
Regulated Voltage output Power supply pin
pulse output 11 5 RDB Error 4,12,13 4 GND Ground pin
2
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©Copyright Agamem Microelectronics Inc.
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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
PIN NO. SSOP16 DIP14 PIN NAME FUNCTION
signal 14 2 VIN Input position voltage 15 11 POT Servo 16 13
■ ABSOLUTE MAXIMUM RATINGS
Ta=25℃
CT Timing Capacitor
SYMBOL PARAMETER Vcc Supply voltage Pd Power dissipation Tstg Storage temperature range
RATINGS UNIT
4.8~7 V 300 mW －25~＋125
℃
■ ELECTRICAL CHARACTERISTICS
Ta=25℃, Vcc=4.8V
SYMBOL PARAMETER ICC Operating current VOL VOH IPNP VREG IREG
Output voltage \"L\" Output voltage \"H\"
TEST CONDITIONS When output is OFF When output is ON
LIMITS
UNIT
MIN TYP MAX- 5 8 mA -
25
28
mA
Load resistor 20Ω - 0.1 0.2 V Load resistor 240Ω 3.5 - - V External PNP transistor Load resistor 240Ω 30 - - mA drive current Regulator output voltage
Regulator output current
Load capacitor 0.1uF
2.3
2.45
2.6
V
Load resistor 500Ω 4 - - mA ©Copyright Agamem Microelectronics Inc.
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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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
■ 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
©Copyright Agamem Microelectronics Inc.
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www.agamem.com.tw 2008/4/22
AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
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)
VCC
10EXP12C8 103pFOUT13VIN14OUT2EXP256VR15KΩVREG9RT1CT16POT15RDBCSTGNDGNDGND11R31KΩC30.1uFC10.1uFC20.1uF741213R1470KΩR71KΩR220KΩR4 150KΩC40.22uFC54.7uF
©Copyright Agamem Microelectronics Inc.
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AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
B. Half H-Bridge application using two external PNP drivers
C. Full H-Bridge application using two PNPs and two NPNs
©Copyright Agamem Microelectronics Inc.
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AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
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. AA51880C PACKAGE SSOP 16L PACKING Q’TY MARK CHART AA51880 XXXX CAA51880 XXXX FAA51880 XXXXP TAPE & REEL 2,500ea AA51880F SSOP 16L(FD) TAPE & REEL 2,500ea AA51880P DIP 14L ©Copyright Agamem Microelectronics Inc.
TUBE 25ea 7
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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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
■ PACKAGE DIMENSIONS
16-pin Plastic SSOPCtheta12°(4X)DeDIMENSIONS IN MILLIMETERSMINNOMMAX1.350.10---0.200.194.805.803.80---0.40---0°1.60---1.450.25------------0.64---------1.750.25---0.300.255.006.204.00---1.270.108°bSYMBOLSAA1A2bCDEE1eLythetaDIMENSIONS IN INCHESMINNOMMAX0.0530.004---0.0080.0070.1890.2280.150---0.016---0°0.064---0.0570.010------------0.025---------0.0690.010---0.0120.0100.1970.2440.157---0.0500.0048°NOTE1. PACKAGE BODY SIZES EXCLUDE MOLD FLASH PROTRUSIONSOR GATE BURRS2. DIMENSION L IS MEASURED IN GAGE PLANE
3.TOLERANCE +/-0.1 mm UNLESS OTHERWISE SPECIFIED
4. CONTROLLING DIMENSION IS MILLIMETER. CONVERTEDINCH DIMENSIONS ARE NOT NECESSARILY EXACT.
5. FOLLOWED FROM JEDEC MO-137
©Copyright Agamem Microelectronics Inc.
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AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
元器件交易网www.cecb2b.com
PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
©Copyright Agamem Microelectronics Inc.
9
www.agamem.com.tw 2008/4/22
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.
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PRELIMINARY
Agamem Microelectronics Inc.
AA51880
SERVO MOTOR CONTROLLER
14-pin DIP
SYMBOLS MIN. NOR.MAX.
A --- --- 0.210A1 0.015 --- --- A2 0.125 0.130D 0.735 0.750E1 0.245 0.250L 0.115 0.130eB 0.335 0.355θ
。
0.1350.7750.2550.1500.375
E 0.300 BSC. 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. eB 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.
©Copyright Agamem Microelectronics Inc.
10
www.agamem.com.tw 2008/4/22
AGAMEM MICROELECTRONICS INCOPERATION RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICETO 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.
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