AA51880 ETC
Document overview
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Technical content
Agamem Technology Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER INTRODUCTION The AA51880 is a BJT integrated circuit for use in servo motor control applications. The built -in voltage regulat or provide s the AA51880 with extremely stable output voltage.
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 DIAGR AM 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 ap plication reference voltage. Timing control Output Driver Voltage Regulator VIN POT C L R T CDB C ST EXP1 OUT1 OUT2 EXP2 VREG
Agamem Technology Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER PIN ASSIGNMENT PIN DESCRIPTION Pin No Symbol Name & Function
1 RT Timing Resistor
2 EXP1 External PNP Transistor 1 output
3 OUT1 Output Driver 1
4 NC No Connection
5 OUT2 Output Driver 2
6 EXP2 External PNP Transistor 2 output
7 CST Stretcher capacitor
8 NC No Connection
9 VREG Regulated Voltage output
10 VCC Power pin
11 RDB Error pulse output
12 GND Ground pin
13 GND Ground pin
14 VIN Input signal
15 POT Servo position voltage
16 CT Timing Capacitor
(Top View) RT EXP1 OUT1 NC OUT2 EXP2 CST NC CT POT VIN GND GND RDB Vcc VREG AA51880
Agamem Technology Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER RATINGS (Ta=25℃, unless otherwise noted) Symbol Parameter Conditions Ratings Unit Vcc Supply voltage 9 V Pd Power dissipation 300 mW Tstg Storage temperature range — 25~125 ℃ ELECTRICAL CHARACTERISTICS (Ta=25℃ and Vcc=4.8V, unless otherwise noted) Unit Min. Typ. Max. When output is OFF 5 8 mA When output is ON 25 28 mA VOL Output voltage"L" Load resistor 20 ohm 0.1 0.2 V VOH Output voltage"H" Load resistor 240 ohm 3.5 V IPNP External PNP transistor drive current Load resistor 240 ohm 30 mA VReg Regulator output voltage Load capacitor 0.1µF 2.3 2.45 2.6 V IReg Regulator output currentLoad resistor 500 ohm 4 mA Test comditions Limits ICC Operating current Symbol Parameter VOLTAGE REGULATOR OUTPUT VOLTAGE CHARACTERISTIC (Ta=25℃) 0 2 4 6 8 VCC V Reg
Agamem Technology I nc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER APPLICATION CIRCUIT M 14 VIN VCC EXP1 2 OUT1 3 OUT2 5 EXP2 6 VREG 9 POT CT RT RDB CST GND GND 15 16 1 11 7 12 13 VR1 5KΩ A695 A695 C8 103 R6 51Ω R7 51Ω 1KΩ 470KΩ R4 150KΩ 1KΩ 20KΩ 10U 0.1U 0.1U C3 0.1U 0.22U 4.7U IC1 AA51880
Agamem Technology Inc. AA51880 PRELIMINARY SERVO MOTOR CONTROLLER n SSOP PACKAGE DIMENSION PLAN