AA51881 Datasheet, PDF (3/7 Pages) Agamem Microelectronic Inc. – SERVO MOTOR CONTROLLER

PRELIMINARY
AA51881 _{Agamem Microelectronics Inc.}
SERVO MOTOR CONTROLLER
■ ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER
VCC Supply voltage
PD Power dissipation
TSTG Storage temperature range
RATINGS
4.8~7
300
－25~＋125
Ta=25℃
UNIT
V
mW
℃
■ ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER
TEST CONDITIONS
ICC
VOL
VOH
IPNP
VREG
IREG
Operating current
When output is OFF
When output is ON
Output voltage "L"
Load resistor 20Ω
Output voltage "H"
Load resistor 240Ω
External PNP transistor drive
current
Load resistor 240Ω
Regulator output voltage
Load capacitor 0.1uF
Regulator output current
Load resistor 500Ω
Ta=25℃, Vcc=4.8V
LIMITS
UNIT
MIN TYP MAX
--- 5 8 mA
--- 25 28 mA
--- 0.1 0.2 V
3.5 --- --- V
30 --- --- mA
2.3 2.45 2.6 V
4 --- --- mA
■ FUNCTIONAL DESCRIPTION
(1) Voltage Regulator
This circuit outputs a 2.45-volt temperature compensated reference voltage. This reference
voltage is stabilized when the supply voltage is variable.
(2) Sawtooth 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.
©Copyright Agamem Microelectronics Inc.
3
www.agamem.com.tw 2008/5/5
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.