Product Summary

The UC2842AD high performance fixed frequency current mode controller is specifically designed for off-line and DC-to-DC converter applications offering the designer a cost effective solution with minimal external components. The UC2842AD features a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and a high current totem pole output ideally suited for driving a power MOSFET.

Parametrics

UC2842AD absolute maximum ratings: (1)Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec), VCC, VC: 30 V; (2)Total Power Supply and Zener Current, (ICC + IZ): 30 mA; (3)Output Current, Source or Sink, IO: 1.0 A; (4)Output Energy (Capacitive Load per Cycle), W: 5.0 uJ; (5)Current Sense and Voltage Feedback Inputs, Vin: -0.3 to + 5.5 V; (6)Error Amp Output Sink Current, IO: 10 mA; (7)Power Dissipation and Thermal Characteristics: D Suffix, Plastic Package: Maximum Power Dissipation @ TA = 25℃: PD=862 mW; Thermal Resistance, Junction.to.Air: RθJA=145℃/W; N Suffix, Plastic Package: maximum Power Dissipation @ TA = 25℃: PD=1.25 W; Thermal Resistance, Junction.to.Air: RθJA=100℃/W; (8)Operating Junction Temperature, TJ: + 150 ℃; (9)Operating Ambient Temperature, TA: 0 to + 70℃; (10)Storage Temperature Range, Tstg: -65 to + 150 ℃.

Features

UC2842AD features: (1)Trimmed Oscillator Discharge Current for Precise Duty Cycle Control; (2)Current Mode Operation to 500 kHz; (3)Automatic Feed Forward Compensation; (4)Latching PWM for Cycle-By-Cycle Current Limiting; (5)Internally Trimmed Reference with Undervoltage Lockout; (6)High Current Totem Pole Output; (7)Undervoltage Lockout with Hysteresis; (8)Low Startup and Operating Current; (9)Direct Interface with ON Semiconductor SENSEFET Products; (10)Pb-Free Packages are Available.cc

Diagrams

UC2842AD block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
UC2842AD8
UC2842AD8
Texas Instruments
Current Mode PWM Controllers Current Mode
Data Sheet
0-1: $0.98
1-25: $0.85
25-100: $0.77
100-250: $0.68
UC2842AD8G4
UC2842AD8G4
Texas Instruments
Current Mode PWM Controllers Current-Mode PWM Controller
Data Sheet
0-1: $0.96
1-25: $0.77
25-100: $0.70
100-250: $0.64
UC2842AD8TRG4
UC2842AD8TRG4
Texas Instruments
Current Mode PWM Controllers Current-Mode PWM Controller
Data Sheet
0-1730: $0.40
1730-2000: $0.37
2000-2500: $0.37
2500-5000: $0.36
UC2842ADG
UC2842ADG
ON Semiconductor
Other Power Management 52kHz 1A Current PWM w/96% Duty Cycle Max
Data Sheet
Negotiable 
UC2842ADG4
UC2842ADG4
Texas Instruments
Current Mode PWM Controllers Current Mode
Data Sheet
0-1: $0.96
1-25: $0.77
25-100: $0.70
100-250: $0.64
UC2842ADM
UC2842ADM

IC REG CTRLR BST FLYBK ISO 8SOIC
Data Sheet
0-1: $2.94
1-10: $2.63
10-100: $2.15
100-250: $1.94
250-500: $1.74
500-1000: $1.47
1000-2500: $1.40
2500-5000: $1.34
5000-10000: $1.30
UC2842ADR2
UC2842ADR2
ON Semiconductor
Other Power Management 52kHz 1A Current PWM
Data Sheet
Negotiable 
UC2842ADR2G
UC2842ADR2G
ON Semiconductor
Other Power Management 52kHz 1A Current PWM w/96% Duty Cycle Max
Data Sheet
Negotiable