1FEATURES

• QML-V Qualified, SMD 5962-91689

• Rad-Tolerant: 40 kRad (Si) TID (1)

• Drives Power MOSFETs or Power Darlingtons

Directly

• 50-V Open Collector High-Side Drivers

• Latched Soft Start

• High-speed Current-Sense Amplifier with Ideal

Diode

• Pulse-by-Pulse and Average Current Sensing

• Over-Voltage and Under-Voltage Protection

• Direction Latch for Safe Direction Reversal

• Tachometer

• Trimmed Reference Sources 30 mA

• Programmable Cross-Conduction Protection

• Two-Quadrant and Four-Quadrant Operation

DESCRIPTION/ORDERING INFORMATION

The UC1625 motor controller integrates most of the functions required for high-performance brushless dc motor

control into one package. When coupled with external power MOSFETs or Darlingtons, this device performs

fixed-frequency PWM motor control in either voltage or current mode while implementing closed loop speed

control and braking with smart noise rejection, safe direction reversal, and cross-conduction protection.

Although specified for operation from power supplies between 10 V and 18 V, the UC1625 can control higher

voltage power devices with external level-shifting components. The UC1625 contains fast, high-current push-pull

drivers for low-side power devices and 50-V open-collector outputs for high-side power devices or level shifting

circuitry.

The UC1625 is characterized for operation over the military temperature range of –55°C to 125°C.