文档介绍：application UC1625
INFO UC2625
available UC3625
Brushless DC Motor Controller
FEATURES DESCRIPTION
• Drives Power MOSFETs or Power Darlingtons The UC3625 family of motor controller ICs integrate most of the
Directly functions required for high-performance brushless DC motor con-
trol into one package. When coupled with external power
• 50V Open Collector High-Side Drivers
MOSFETs or Darlingtons, these ICs perform fixed-frequency PWM
• Latched Soft Start motor control in either voltage or current mode while implementing
closed loop speed control and braking with smart noise rejection,
• High-speed Current-Sense Amplifier with Ideal
Diode safe direction reversal, and cross–conduction protection.
Although specified for operation from power supplies between 10V
• Pulse-by-Pulse and Average Current Sensing
and 18V, the UC1625 can control higher voltage power devices
• Over-Voltage and Under-Voltage Protection with external level-ponents. The UC1625 contains fast,
high-current push-pull drivers for low-side power devices and 50V
• Direction Latch for Safe Direction Reversal
open-collector outputs for high-side power devices or level shifting
• Tachometer circuitry.
• Trimmed Reference Sources 30mA The UC1625 is characterized for operation over the military tem-
perature range of –55°C to +125°C, while the UC2625 is charac-
• Programmable Cross-Conduction Protection
terized from –40°C to +105°C and the UC3625 is characterized
• Two-Quadrant and Four-Quadrant Operation from 0°C to 70°C. (NOTE: ESD Protection to 2kV)
TYPICAL APPLICATION
+5V TO HALL +15V VMOTOR
VREF
SENSORS
3kΩ+
100nF 100nF + 100µF
2N3904
20µF 20µF
10Ω
10kΩ
Ω
3kΩ 10k
ROSC 2 19 11
QUAD 33kΩ 2N3906
IRF9350
22 3kΩ
DIR
16
6 TO
1k 17 MOTOR
1 TO OTHER
CHANNELS
18
100nF 28 UC3625
4kΩ
14 REQUIRED
27 TO OTHER FOR BRAKE
CHANNELS
13 AND FAST
25 10Ω REVERSE
2200pF IRF532
12
COSC
15 20
BRAKE 21 26 3 24 23 8 9 10 4 5