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FAN8024D (KA3024D)
4-Channel Motor Driver
Features
* * * * * * 2-Channel BTL driver with current feedback 2-Channel BTL DC motor driver Built-in thermal shutdown circuit Built-in mute circuit Operating supply voltage: 4.5~13.2V Corresponds to 3.3V or 5V DSP
Description
The FAN8024D is a monolithic IC, suitable for a 2-ch BTL DC motor driver and a 2-ch motor driver with current feedback which drives the focus and tracking actuator of a CDmedia system.
28-SSOPH-375
Typical Applications
* * * * * * Compact disk ROM (CD-ROM) Compact disk RW (CD-RW) Digital video disk ROM (DVD-ROM) Digital video disk RAM (DVD-RAM) Digital video disk player (DVDP) Other compact disk media
Ordering Information
Device FAN8024D Package 28-SSOPH-375 Operating Temp. -35 C ~ 85 C -35 C ~ 85 C
FAN8024DTF 28-SSOPH-375
Rev. 1.0.1 February. 2000.
(c)2000 Fairchild Semiconductor International
1
28
1 2 3 4 5 6 7
FAN8024D (KA3024D)
IN1 27 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1
STBY REF 26 25 24 23 22 IN4 CAP4.1 CAP4.2 IN3 VCCGND
Pin Assignments
(GND) FIN
FAN8024D
PVCC1 PGND1 DO2- DO2+ DO1- DO1+
FIN (GND)
2
8 9 10 11 12 13 14
21
VCC
PVCC2 20 19 18 17 16 15 FB4 PGND2 DO3- DO3+ DO4- DO4+
FAN8024D (KA3024D)
Pin Definitions
Pin Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Pin Name IN1 CAP1.1 CAP1.2 IN2.1 IN2.2 OUT2 FB1 VCC PVCC1 PGND1 DO2- DO2+ DO1- DO1+ DO4+ DO4- DO3+ DO3- PGND2 FB4 PVCC2 VCCGND IN3 CAP4.2 CAP4.1 IN4 REF STBY I/O I I I O I O O O O O O O O I I I I CH1 input Connection with capacitor for CH1 OP-AMP CH2 input(+) OP-AMP CH2 input(-) OP-AMP CH2 output Feedback for CH1 Signal Vcc Power Supply 1 Power Ground 1 Drive2 Output (-) Drive2 Output (+) Drive1 Output (-) Drive2 Output (+) Drive4 Output (+) Drive4 Output (-) Drive3 Output (+) Drive3 Output (-) Power Ground 2 Feedback for CH4 Power Supply 2 Vcc ground CH3 input Connection with capacitor for CH4 CH4 input Bias voltage input Stand-by input Pin Function Description
3
FAN8024D (KA3024D)
Internal Block Diagram
VCCGND CAP4.1 CAP4.2 PGND2 PVCC2
DO3-
DO4-
DO3+
28
27
26
25
24
23
22
21
20
FB4
IN4
IN3
GND
19
18
17
16
15
10K
20K
+
7.5K
PVCC2
7.5K X2
10K
15K
TSD PVCC1 PVCC2
20K
10K
7.5K
+
10K
1 IN1
2 CAP1.1
3 CAP1.2
4 IN2.1
DO1-
DO2-
GND
4
PVCC1
PGND1
IN2.2
OUT2
DO2+
DO1+
FB1
VCC
-
+
-
-
+
-
+
Loading Driver
Actuator Driver
+
VCC 7.5K X2
25K
Sled Driver
Actuator Driver
VCC PVCC1
5 6 7 8 9 10 11 12 13 14
DO4+
STBY
REF
-
-
+
-
FAN8024D (KA3024D)
Equivalent Circuits
ERROR AMP INPUT STAND-BY INPUT
8K 4 1K 2K
8K 5 1K 2K
28
50
ERROR AMP OUTPUT
SIGNAL REFERENCE INPUT
5 50 6 40 27
POWER AMP OUTPUT
11 12 13 14 16 17 18
5
FAN8024D (KA3024D)
Absolute Maximum Ratings (Ta = 25C)
Parameter Maximum supply voltage Power dissipation Operating temperature range Storage temperature range Symbol VCCmax PD TOPR TSTG Value 15 1.7note -35 ~ +85 -55 ~ +150 Unit V W C C
NOTE: 1. When mounted on a 50mm x 50mm x 1mm PCB (Phenolic resin material). 2. Power dissipation reduces 13.6mW/C for using above Ta = 25C 3. Do not exceed PD and SOA(Safe operating area).
Power Dissipation Curve
Pd [mW] 3,000
2,000
1,000 0 0
SOA
25 50 75 85 100 125 150 175 Ambient Temperature, Ta [C]
Recommended Operating Conditions (Ta = 25C)
Parameter Supply Voltage Symbol Vcc Min. 4.5 Typ. Max. 13.2 Unit V
6
FAN8024D (KA3024D)
Electrical Characteristics
(Unless otherwise specified, Ta = 25 C, VCC = 12V, PVCC1,2 = 5V & the other conditions & nomenclatures follow the test circuit) Parameter Quiescent Current1 Quiescent Current1 Stand-by On Voltage Stand-by Off Voltage ACTUATOR DRIVE CIRCUIT Output Offset Current Maximum Output Voltage1 Transconductance PRE OP-AMP (SLED DRIVER) ) - Common mode Input Range Input Bias Current Low Level Output Voltage Output Source Current Output Sink Current SLED DRIVE CIRCUIT Output Offset Voltage of Input OP-Amp Maximum Output Voltage2 Closed loop Voltage Gain1 Loading DRIVE CIRCUIT Output Offset Voltage1 Maximum Output Voltage 3 Closed loop Voltage Gain 2 VOF3 VOM3 GVLO3 VIN3 set to BIAS VIN3 set to 4.5V VIN3 = 100mVp-p, f=1KHz -50 3.6 13.5 0 4.0 15.5 50 17.5 mV V dB VOF2 VOM2 GVLO2 SW1=>posit. 2, SW2=>posit. 1 VIN 2 & VIN5 set to BIAS SW1 & SW2 set to position 2 VIN2 set to 4.5V VIN2 = 100mVp-p, f=1kHz SW2 & SW1 set to position 2 -100 10.0 18.0 0 10.9 20.0 +100 22.0 mV V dB VOOM IB VOL ISOURCE ISINK SW1 & SW2 set to position 2, VIN2 sweep from 0V to 12V SW1 & SW2 set to position 1 SW1=>posit. 2, SW2=>posit. 1 VIN2 is 2.0V & VIN5 is 3.0V SW1 set to position 2 SW2 & SW3 set to position 1 VIN2 is 3.0V & VIN5 is 2.0V SW3 set to position 2 VIN2 is 2.0V & VIN5 is 3.0V 0 -300 1 5 -30 0.1 4 10 11.0 0.3 V nA V mA mA IOO1,4 VOM1,4 GM1,4 VIN1,4 set to BIAS VIN1,4 = 4.5V VIN1,4 = 100mVp-p, f=1kHz -6 3.6 1.5 0 4.0 1.7 +6 1.9 mA V A/V Symbol ICC1 ICC2 VSTon VSToff Conditions Stand-by off Stand-by on Min. 2.0 Typ. 18 Max. 27 0.5 0.5 Unit mA mA V V
7
FAN8024D (KA3024D)
Application Information
1. REFERENCE INPUT & STAND-BY FUNCTION * Reference input (PIN 27) The applied voltage at the reference input pin must be between 1.4V and 6.5V, when VCC=8.5V. * Stand-by input (PIN 28) The following input conditions must be satisfied for the normal stand-by function. Stand-by input voltage Stand-by input voltage Below 0.5V or OPEN Above 2.0V Stand-by function is activated so the bias block and the power block are disabled Normal operation
2. PROTECTION FUNCTION Thermal shutdown (TSD) If the chip temperature rises above 175C, the thermal shutdown (TSD) circuit is activated and the output circuit is in the mute state, that is off state. The TSD circuit has a temperature hysteresis of 25C
3. SEPARATION OF POWER SUPPLY * PVcc1 (PIN 9) PVcc1 is the power for loading driver. The range is between 5V ~ 12V. * PVcc2 (PIN 21) PVcc2 is the power supply for actuator driver that include focus and tracking actuator. The range is between 5V ~ 12V * Vcc (PIN 8) Vcc pin supplies power for sled driver and signal logic part. The voltage applied to Vcc must be higher than PVcc1 and PVcc2 at least 1V
8
FAN8024D (KA3024D)
Test Circuits
VIN1
1 2 C1 V SW1 1 R1 2 1 3 4 5 6
28 VST 27 BIAS 26 VIN4 25 C5 24 23 VIN3
VIN2
VIN5 V R2
V
2SW2
FAN8024D
V SW3 12
R3
V
7
22
12V VCC C2 A PVCC1 C3 10 11 V 12 13 R6 R5 V 14 9
A
8
21 20 19 18 V 17 16 V 15
A C4 PVCC2
R4
R9
R7
R8
Symbol R1 R2 R3 R4 R5
Value 1M 1M 50 8 4
Symbol R6 R7 R8 R9 C1
Value 5 4 5 8 100pF
Symbol C2 C3 C4 C5 BIAS
Value 10uF 10uF 10uF 100pF 2.5V
9
FAN8024D (KA3024D)
Typical Application Circuits
1 SERVO FOCUS AMP TRACKING SLED 2
IN1 CAP1.1 CAP1.2
STBY 28 REF 27 IN4 26 CAP4.1 25 CAP4.2 24 IN3 23
Stand by REF
3
REF
4
IN2.1
5
IN2.2 OUT2
6
TRAY CONTROL IN
7
FB1
VCCGND 22
FAN8024D
8 12V 9 5V or 12V 10 PGND 11 DO2- SLED MOTOR 12 DO2+ DO3+ 17 PGND 19 DO3- 18 TRAY MOTOR PVCC1 FB4 20 VCC PVCC2 21 5V or 12V
FOCUS ACTUATOR
13 DO1- RD 14 DO1+
DO4- 16 RD DO4+ 15
TRACKING ACTUATOR
10
FAN8024D (KA3024D)
DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. LIFE SUPPORT POLICY FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR INTERNATIONAL. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user.
www.fairchildsemi.com 12/1/00 0.0m 001 Stock#DSxxxxxxxx 2000 Fairchild Semiconductor International
2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.

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