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FAN8024CDTF

P1-P3P4-P6P7-P9P10-P12
FAN8024CD
7
Electrical Characteristics
(Unless otherwise specified, Ta = 25 °C, V
CC
= 12V, PV
CC
1,2 = 5V)
* : Guaranteed design value
Parameter Symbol Conditions Min. Typ. Max. Unit
Quiescent Current1 I
CC1
Stand-by off - 18 27 mA
Quiescent Current1 I
CC2
Stand-by on - - 0.5 mA
Stand-by On Voltage V
STon
---0.5V
Stand-by Off Voltage V
SToff
-2.0--V
ACTUATOR DRIVE CIRCUIT
Output Offset Current I
OO1,4
--60+6mA
Maximum Output Voltage1 V
OM1,4
-3.64.0-V
Transconductance G
M1,4
V
IN
= 100mVp-p, f=1kHz 1.5 1.7 1.9 A/V
PRE OP
AMP (SLED DRIVER)
Common mode Input Range* V
OOM
-0-11.0V
Input Bias Current I
B
- -300 -30 - nA
Low Level Output Voltage V
OL
--0.10.3V
High Level Output Voltage V
OH
- 10 10.9 - V
Output Source Current I
SOURCE
-14-mA
Output Sink Current I
SINK
-510-mA
SLED DRIVE CIRCUIT
Output Offset voltage2 V
OF2
- -100 0 +100 mV
Maximum Output Voltage2 V
OM2
- 10.0 10.9 - V
Closed loop Voltage Gain1 G
VLO2
V
IN
= 100mVp-p, f=1kHz 18.0 20.0 22.0 dB
Loading DRIVE CIRCUIT
Output Offset Voltage1 V
OF3
--50050mV
Maximum Output Voltage 3 V
OM3
-3.64.0-V
Closed loop Voltage Gain 2 G
VLO3
V
IN
= 100mVp-p, f=1KHz 13.5 15.5 17.5 dB
FAN8024CD
8
Application Information
1. Reference Input & Stand-by Function
• Reference input (PIN 27)
The applied voltage at the reference input pin must be ranged between 0.8V and 6.5V, when V
CC
=8.5V.
• Stand-by input (PIN 28)
The following input conditions must be satisfied for the stand-by function.
2. Protection Function
Thermal shutdown (TSD)
If the chip temperature rises above 175°C, the thermal shutdown (TSD) circuit is activated and the output circuit enters the
mute state, that is off state. The TSD circuit has a temperature hysteresis of 25°C
3. Separation Of Power Supply
•PV
CC1
(PIN 9)
PV
CC1
is the power supply for the loading driver. The range is between 5V ~ 12V.
•PV
CC2
(PIN 21)
PV
CC2
is the power supply for the actuator drivers that include focus and tracking actuators. The range is between 5V ~ 12V
•V
CC
(PIN 8)
V
CC
pin supplies power for the sled driver and the signal logic part. V
CC
≥PV
CC1
(PV
CC2
).
Stand-by input voltage OPERATION
below 0.5V or open
The stand-by function is activated so the bias block and
power block are disabled
above 2.0V Recover the normal operation
FAN8024CD
9
4. Current feedback channels(channel 1 & 4)
• The reference voltage(ref) is given externally through pin 27.
• The input OP-amp output signal is amplified by (20K/10K) times and then fed to the current feedback amplifier.
• The current feedback amplifier compares the output current sensed input and command input then makes the controlled
output to eliminate delay effect of the load. Please refer to the application note for more information about current feedback
theory(http://www.fairchildsemi.com/an/AN/AN-4109.pdf).
• The DC gain of current feedback amplifier and power amplifier is unity, that is 1 [A/V]. Users can change the gain by
adding external resistor at the command input.
5. Channel 2 schematic
• The reference voltage(ref) is given externally through pin 27.
• The input OP-amp can be used for several purposes, for example low pass filter, differential input coordinator, gain scaler
and so on.
Level shift
X2
20k
10k
7.5k
7.5k
ref
actuator
Sensing resistor
Rext Cext
Command
power amp
current feedback amp
Level shift
25k
10k
ref
power amp
M
P1-P3P4-P6P7-P9P10-P12

FAN8024CDTF

Mfr. #:
Buy FAN8024CDTF
Manufacturer:
ON Semiconductor
Description:
IC MOTOR DRVR 4.5V-13.2V 28SSOPH
Lifecycle:
New from this manufacturer.
Delivery:
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