AX3842 Datasheet, PDF (1/12 Pages) List of Unclassifed Manufacturers – High Performance Current Mode Pwm Controlers

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AX3842P / AX3842S
High Performance Current Mode Pwm Controlers
Description
The AX3842 Series is high performance fixed frequency current mode controllers.
That is specifically designed for Off-Line and DC To DC converter applications
offering the designer a costeffective solution with minimal external components.
These integrated circuits feature a trimmed oscillator for precise duty cycle control.
A temperature compensated reference, high gain error amplifier, current sensing
compara-tor, and a high current totem pole output ideally suited for driving a
power MOSFET. Also included are protective features consisting of input and
reference undervoltage lockouts each with hysteresis, cycle-by-cycle current
limiting, programmable output deadtime, and a latch for single pulse metering.
8-Lead Plastic DIP-8
Package Code: P
•
8-Lead Plastic SO-8
Package Code: S
Features
• Trimmed Oscillator for Precise Frequency Control
• Oscillator Frequency Guaranteed at 250 kHz
• Current Mode Operation to 500 kHz
• Automatic Feed Forward Compensation
• Latching PWM for Cycle-By-Cycle Current Limiting
• Internally Trimmed Reference with Undervoltage Lockout
• High Current Totem Pole Output
• Undervoltage Lockout with Hysteresis
• Low Startup and Operating Current
Absolute Maximum Ratings
Symbol
V_i
V_i
I_O
E_O
P_tot
T_stg
T_J
T_L
Parameter
Supply Voltage (low impedance source)
Supply Voltage (I_i<30mA)
Output Current
Output Energy (capacitive load)
Analog Inputs (pin 2, 3)
Error Amplifier Output Sink Current
Power Dissipation at T_amb≤25^oC
Storage Temperature Range
Junction Operating Temperature
Lead Temperature (soldering 10s)
Value
Unit
30
V
Self Limiting
±1
A
5
uJ
-0.3 to 5.5
V
10
mA
800
mW
-65 to 150
o_C
-40 to 150
o_C
300
o_C
Thermal Data
Symbol
Rth j-amb
Description
Thermal Resistance Junction-ambient
DIP-8
100
SO-8
150
Units
o_C/W
AVANTICS - AX3842 Series
Specification No.: 050308-FE0008