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BA6283N / BA6955N

Motor driver ICs

Reversible motor driver

BA6283N / BA6955N

The BA6283N and BA6955N are reversible-motor drivers with a maximum output current of 1.0A. Two logic inputs allow

four output modes: forward, reverse, stop (standby), and brake.

The built-in power save circuit suppresses current consumption in the motor stop mode.

!Applications

VCRs, audio devices

Features

1) Logic and driver sections have separate ground pins; this allows the IC to drive speed-variable, reversible motors by

connecting an electronic governor circuit.

2) Built-in power saving circuit suppresses current consumption in stop (standby) mode.

3) Interfaces with TTL devices.

4) Built-in thermal shutdown circuit.

Absolute maximum ratings

(Ta = 25°C)

Parameter Symbol Limits Unit

Applied voltage

18 V

Power dissipation Pd

BA6283N

BA6955N

1150

∗1

1080

∗2

Operating temperature Topr

−20~+75

°C

Output current

OUT

1000

∗3

Storage temperature Tstg

−55~+150

°C

∗1 Reduced by 9.2mW for each increase in Ta of 1°C over 25°C.

∗2 Reduced by 8.64mW for each increase in Ta of 1°C over 25°C.

∗3 Should not exceed Pd or ASO values.

!Recommended operating conditions (Ta = 25°C)

Parameter

Operating power supply voltage

CC 5.5 15 V

−

M 5.5 15 V

−

Symbol Min. Typ. Max. Unit

Summary of content (9 pages)

PAGE 1
BA6283N / BA6955N Motor driver ICs Reversible motor driver BA6283N / BA6955N The BA6283N and BA6955N are reversible-motor drivers with a maximum output current of 1.0A. Two logic inputs allow four output modes: forward, reverse, stop (standby), and brake. The built-in power save circuit suppresses current consumption in the motor stop mode.
PAGE 2
BA6283N / BA6955N Motor driver ICs !Block diagram BA6283N CONTROL LOGIC TSD POWER SAVE 1 2 3 4 5 6 7 8 9 OUT2 RNF OUT1 VM GND VCC FIN GND RIN BA6955N CONTROL LOGIC TSD POWER SAVE 1 2 3 4 5 6 7 8 VCC FIN GND RIN OUT2 RNF OUT1 VM
PAGE 3
BA6283N / BA6955N Motor driver ICs !Pin descriptions BA6283N Pin No. Pin name 1 OUT2 Functions Motor output Output GND, for connecting resistor for output current detection 2 RNF 3 OUT1 4 VM 5 GND 6 VCC Power supply 7 FIN Logic input 8 GND 9 RIN Motor output Motor power supply GND GND Logic input BA6955N Functions Pin No.
PAGE 4
BA6283N / BA6955N Motor driver ICs !Electrical characteristics (unless otherwise noted, Ta=25°C, VCC=9V, and VM=9V) Symbol Min. Typ. Max. Unit Circuit current1 ICC1 − 30 43.5 mA Forward or reverse mode Circuit current2 ICC2 − 40 58 mA Brake mode Circuit current3 ICC3 − − 15 µA Standby mode Input high level voltage VIH 2.0 − − V Input low level voltage VIL − − 0.8 V Input high level current IIH 50 90 130 µA VIN=2.0V VCE − 1.0 1.
PAGE 5
BA6283N / BA6955N Motor driver ICs VCE : Sum of the high and low side output transistor voltage. IO flows from High to Low Level output pins. VCC VIF VIR V V VOR VOF VM Fig.5 !Circuit operations (1) Input section (FIN, RIN) Control signals are input from these pins. Input circuit can be controlled with TTL or over voltage input. Operation in each mode is show below.
PAGE 6
BA6283N / BA6955N Motor driver ICs (6) Ground (GND, RNF) Attached the current detection resistors at the RNF terminal, the current flowing in the motor can be detected. Also attached the electronic governor, the speed-variable reversible motors can be constructed. !Application example BA6238N CONTROL LOGIC TSD POWER SAVE M LOGIC CONTROL IC VCC Fig.
PAGE 7
BA6283N / BA6955N Motor driver ICs BA6955N CONTROL LOGIC TSD POWER SAVE M LOGIC CONTROL IC VCC Fig.7 !Operation notes (1) The quality of these products have been carefully checked; however, use of the products with applied voltages, operating temperatures, or other parameters that exceed the absolute maximum rating given may result in the damage of the IC and the product it is used in.
PAGE 8
BA6283N / BA6955N Motor driver ICs (5) Large current line Large currents are carried by the motor power supply and motor ground for these ICs. Therefore, the layout of the pattern of the PC board and the constants of certain parameters for external components, such as the capacitor between the power supply and ground, may cause this large output current to flow back to the input pins, resulting in output oscillation or other malfunctions.
PAGE 9
BA6283N / BA6955N Motor driver ICs 1000 BA6955N 500 0 25 50 75 100 125 40 30 Curcuit current 1 Inputs FIN : H RIN : L 20 10 0 150 VCC Curcuit current 2 Inputs FIN : H RIN : H OUTPUT HIGH VOLTAGE : VOH (V) BA6283N 0 OUTPUT HIGH VOLTAGE : VOL (V) CIRCUIT CURRENT : ICC (mA) POWER DISSIPATION : Pd (mw) !Electrical characteristic curves 0 4 8 12 16 20 VCC−0.5 Inputs FIN : H RIN : L Outputs : OUT1 VCC=9V VM=9V VCC−1.0 VCC−1.5 VCC−2.0 VCC−2.5 VCC−3.0 0 0.2 0.4 0.