AM5680M28-E1 データシートの表示（PDF） - BCD Semiconductor
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AM5680M28-E1 Datasheet PDF : 13 Pages
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Data Sheet
5-CHANNEL MOTOR DRIVER FOR DVD PLAYER
AM5680
Application Information
1. The built-in thermal shutdown circuit mutes the
output current when the chip temperature reaches
175oC (Typ). The hysteresis is set to 30oC (Typ), so the
circuit will start up again when the chip temperature
falls to 145oC (Typ).
Input circuit of pins 6 and 7 is designed to avoid
simultaneous activation of upper and lower output
tray; however, in order to improve reliability, apply
motor forward/reverse input once through open mode.
Time period for open is recommended to be longer
than 10msec.
2. In case mute pin voltage is under 0.5V or this pin is
not connected, output current is muted (except for tray
motor driver). Mute pin voltage should be more than
2.0V for normal application.
3. BIAS pin (pin 27) should be pulled up to more than
1.2V. In case the bias pin voltage is pulled down below
0.9V (Typ), the output current is muted.
4. Insert the bypass capacitor (about 0.1µF) between
VCC1,2 pin and GND pin as close as possible to this
chip.
"H" side output voltage on output pins (VOTR+ or
VOTR-) varies depending on output control terminal
for tray (pin 21). "H" side output voltage is set to three
times (9.2dB Typ) the voltage of VCTL (pin 21). And,
"L" side output voltage is equal to output saturation
voltage.
7. For 3.3V I/O system, if voltage applied to VCCD
(pin 20) is lower than detector threshold voltage (Typ
2.9V), RESET pin (pin 24) will generate a L level as
reset signal. Once the VCCD comes over 3.1V,
RESET pin will change to H level immediately.
5. Heat dissipation fins are attached to the GND on
the inside of the package. Make sure to connect them
to the external GND.
6. Tray driver logic input:
FWD REV VOTR+ VOTR-
(pin6) (pin7) (pin10) (pin9)
L
L
OPEN OPEN
L
H
L
H
H
L
H
L
H
H
L
L
Function
Open
mode
Reverse
mode
Forward
mode
Brake
mode
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
11
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