KA3021D Fairchild Semiconductor, KA3021D Datasheet - Page 9

• Manufacturer Part Number: KA3021D
• Description: Motor / Motion / Ignition Controllers & Drivers SSOP-28
• Manufacturer: Fairchild Semiconductor
• Type: 4 Channel Motor Driverr

Specifications of KA3021D

• Mounting Style: SMD/SMT
• Package / Case: SSOPH-28
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

KA3021D
3. FOCUS, TRACKING ACTUATOR, SLED MOTOR DRIVE PART
• The reference voltage REF is given externally through pin 23.
• The input signal,pin3,20.25 is amplified by R2 / R1 times and then fed to the level shift circuit.
• The level shift circuit produces the differential output voltages and drives the two output power amplifiers. Since the
• If the total gain is insufficient, the external resistors can be used through pin 4, 24 to increase the gain.
• The bias voltage (Vref) is about a half of the supply voltage(VM).
4. TRAY MOTOR DRIVE PART
differential gain of the output amplifiers is equal to 2 (1+ R4 / R3), input signal is amplified by (R2 / R1) 2 (1 + R4 /
R3).
R4
CTL
19
23
R3
DO2+
AP2
+
LEVEL
Vref
12
FWD
Power amp
IN
16
D
LEVEL SHIFT
Vr
AP1
M
3
9
M.S.C
20 25
SHIFT
S.W
M
R1
+
AP3
R2
4
REV
IN
15
R3
D
24
DO2
13
R4