Pioneer Avh-P5050 Service Manual

Motor driver ICs

Reversible motor driver
BA6246N / BA6247 / BA6247N / BA6247FP-Y
The BA6246N, BA6247, BA6247N and BA6247FP-Y are monolithic ICs incorporating two reversible-motor drivers. TheICs differ in the control logic and output mode.
FFeatures
1) Two reversible-motor drivers in each unit.
2) Built-in thermal shutdown circuit.
3) Output voltage can be set arbitrarily.

FBlockdiagram

498

4) Available in a compact SIP10pin package
(BA6246N, BA6247N) or a HSIP10pin package with
radiation fins (BA6247).
5) Available in a HSOP25pin surface-mount package
(BA6247FP-Y).Motor driver ICs

BA6246N / BA6247 / BA6247N / BA6247FP-Y

FControl pin equivalent circuits

FInput / output truth table

FAbsolute maximum ratings (Ta = 25_C)

499

Motor driver ICsBA6246N / BA6247 / BA6247N / BA6247FP-Y

FElectrical characteristics (unless otherwise noted, Ta = 25_C and VCC = 12V)

FApplication examples

500

Motor driver ICs

BA6246N / BA6247 /BA6247N / BA6247FP-Y

FOperation notes
(1) Input conditions
(1) The input threshold voltage is positively correlated
with temperature as expressed by :
∆VIH
∆T

)2.8mV / _C

∆VIL
)1.6mV / _C(Typ.)
∆T
(2) The input pins of the BA6246N are pulled up through
a resistance of about 15kΩ (see Fig. 1). To secure the
LOW level input, the interface to these pins should have
a current-sinkcapability of at least 700 µ A
(5V / 15kΩ 2).
(3) The maximum input voltage is 6V. Make sure that the
input will not exceed this value. Also when the voltage
VCC is not applied to the IC, do notapply voltages to the
input pins.
(2) Changes in motor direction
When reversing the rotational direction of a motor, make
sure to go through the brake or open mode in-between
the oppositedirections.
The duration of brake mode should be more than the
braking time, which is defined by the time required for the
potential of the LOW level output pin to become less than
the ground potential...