ETC AA51880

AA51880
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.
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
OUT1
Driver
OUT2
EXP2
Timing control
VIN
Voltage
Regulator
P OT
CL
RT
CDB
VREG
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
AA51880
Agamem Technology Inc.
PRELIMINARY
SERVO MOTOR CONTROLLER
PIN ASSIGNMENT
1
16
CT
EXP1
2
15
POT
OUT1
3
14
VIN
NC
4
13
GND
OUT2
5
12
GND
EXP2
6
11
RDB
CST
7
10
Vcc
NC
8
9
AA51880
RT
VREG
(Top View)
PIN DESCRIPTION
Pin No
Symbol
Name & Function
Timing Resistor
1
RT
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
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
Regulated Voltage output
2
2003-04-24
AA51880
Agamem Technology Inc.
PRELIMINARY
SERVO MOTOR CONTROLLER
RATINGS (Ta=25℃, unless otherwise noted)
Symbol
Parameter
Conditions
Vcc
Supply voltage
Pd
Power dissipation
Tstg
Storage temperature
range
Ratings
Unit
9
V
300
mW
—
℃
25~125
ELECTRICAL CHARACTERISTICS (Ta=25℃ and Vcc=4.8V, unless otherwise noted)
Symbol
Parameter
ICC
Operating current
VOL
Output voltage"L"
Test comditions
Limits
Min.
Unit
Typ.
Max.
When output is OFF
5
8
mA
When output is ON
25
28
mA
0.1
0.2
V
Load resistor 20 ohm
VOH
Output voltage"H"
Load resistor 240 ohm
3.5
IPNP
External PNP transistor drive current
Load resistor 240 ohm
30
VReg
IReg
Regulator output voltage
Regulator output current
Load capacitor 0.1µF
Load resistor 500 ohm
2.3
4
2.45
2.6
VOLTAGE REGULATOR OUTPUT VOLTAGE CHARACTERISTIC (Ta=25℃)
4
VReg
3
2
1
0
0
2
4
6
8
VCC
3
2003-04-24
V
mA
V
mA
AA51880
Agamem Technology Inc.
PRELIMINARY
SERVO MOTOR CONTROLLER
APPLICATION CIRCUIT
Q2
A695
10
IC1 AA51880
VCC
14 VIN
C7
10U
POT CT
15
16
C2
0.1U
RT
1
EXP1
OUT1
OUT2
EXP2
2 R6 51Ω
3
5
6
R7 51Ω
V REG
9
C8
Q1
A695
103
M
VR1
5KΩ
RDB CST GND GND
11
7
12 13
R1
470KΩ
R3
1KΩ
C3 0.1U
R2
C1
0.1U 20KΩ
R4 150KΩ
C4
0.22U
4
C5
4.7U
2003-04-24
R7
1KΩ
AA51880
Agamem Technology Inc.
PRELIMINARY
SERVO MOTOR CONTROLLER
n
SSOP
PACKAGE
DIMENSION
PLAN
5
2003-04-24