UC3842AN

Operating Supply Voltage :
Operating Supply Current :
Number of Outputs : 1
Mounting Style : Through Hole
Switching Frequency : 500 KHz
Rise Time : 50 ns
Duty Cycle (Max) : 100 %
Fall Time : 50 ns
Maximum Operating Temperature : + 70 C
Package / Case : PDIP-8


Pinout




Description

The UC2842AD is designed as one kind of high performance fixed frequency current mode controller that belongs to the UC2842 family. This device has the UVLO threshold of 16V (on) and 10V (off), this UVLO threshold can be used in off-line applications, and could operates to duty cycles approaching 100%. And this device also features a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator

Features of the UC2842AD are:(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 Motorola SENSEFET products.

The absolute maximum ratings of the UC2842AD can be summarized as:(1)Total Power Supply and Zener Current: 30 mA;(2)Output Current, Source or Sink: 1.0 A;(3)Output Energy (Capacitive Load per Cycle): 5.0 uJ;(4)Current Sense and Voltage Feedback Inputs: -0.3 to + 5.5 V;(5)Error Amp Output Sink Current: 10 mA;(6)Operating Junction Temperature: +150 °C;(7)Operating Ambient Temperature: -25°C to + 85°C;(9)Storage Temperature Range: -65°C to +150°C;(10)Lead Temperature (Soldering, 10 Seconds): 300°C.

The electrical characteristics of this device UC2842AD can be summarized as:(1)Output Voltage: 4.95 V to 5.05 V;(2)Line Regulation: 2.0 mV to 20 mV;(3)Load Regulation: 3.0 to 25 mV;(4)Total Output Variation: 4.9 to 5.1 V;(5)Output Noise Voltage: 50 uV;(6)Long Term Stability: 5.0 mV;(7)Output Short Circuit: -30 to -180 mA;(8)Delay to Output: 150 ns to 300 ns;(9)Input Bias Current: -2 to -10 uA;(10)PSRR: 70 dB. If you want to know more information such as the electrical characteristics about it, please download the datasheet in www.seekic.com or www.chinaicmart.com.

Parameters:

Technical/Catalog Information	UC3842AN
Vendor	STMicroelectronics
Category	Integrated Circuits (ICs)
PWM Type	Current Mode
Number of Outputs	1
Package / Case	8-DIP (300 mil)
Packaging	Tube
Duty Cycle	100%
Voltage - Supply	10 V ~ 30 V
Frequency-Max	500kHz
Buck	No
Boost	Yes
Flyback	Yes
Inverting	No
Doubler	No
Divider	No
Cuk	No
Isolated	Yes
Drawing Number	*
Operating Temperature	0°C ~ 70°C
Lead Free Status	Lead Free
RoHS Status	RoHS Compliant
Other Names	UC3842AN UC3842AN 497 3078 5 ND 49730785ND 497-3078-5