UC3845 IC DIP/SMD SOP-8 Current Mode PWM Controller

Key Features:
Trimmed oscillator for precise frequency control
Oscillator frequency guaranteed at 250 kHz for consistent operation
Current mode operation supporting output switching frequencies up to 500 kHz
Adjustable output deadtime ranging from 50% to 70% for fine-tuned performance
Automatic feed-forward compensation for stable operation
Latching PWM for cycle-by-cycle current limiting
Internally trimmed reference with undervoltage lockout for reliable startup
High current totem pole output for effective driving of power stages
Under-voltage lockout with hysteresis to prevent operation under low voltage conditions
Low startup and operating current for energy efficiency

Specifications:
Supply voltage (low impedance source): 30V
Supply voltage (Ii < 30mA): Self-limiting
Output current: ±1A
Output energy (capacitive load): 5µJ
Analog input voltage range (pins 2, 3): – 0.3V to 5.5V
Error amplifier output sink current: 10mA
Power dissipation at Tamb ≤ 25°C (Mini dip): 1.25W
Power dissipation at Tamb ≤ 25°C (SO8): 800mW
Storage temperature range: – 65°C to 150°C
Operating temperature: – 40°C to 150°C
Soldering temperature (10s): 300°C

Applications:
The UC3845B is ideal for a wide range of applications, including power supplies, inverters, motor control systems, and other circuits requiring efficient PWM control.