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MIK3842A

Mikron
Part Number MIK3842A
Manufacturer Mikron
Description CURRENT MODE PWM CONTROLLER
Published Mar 4, 2015
Detailed Description MIK3842A, MIK3843A MIK3844A, MIK3845A CURRENT MODE PWM CONTROLLER Description MIK3842A, MIK3843A, MIK3844A and MIK3845A...
Datasheet PDF File MIK3842A PDF File

MIK3842A
MIK3842A

Overview
MIK3842A, MIK3843A MIK3844A, MIK3845A CURRENT MODE PWM CONTROLLER Description MIK3842A, MIK3843A, MIK3844A and MIK3845A are high performance with fixed frequency current mode PWM controllers.
They are specially designed for off-Line and DC-to-DC converter applications with minimum external components.
These devices feature a trimmed oscillator for precise duty cycle control, a temperature compensated reference, high gain error amplifier, current sensing comparator, and high current totem pole output which is suitable for driving MOSFETs.
The under voltage lock-out (U.
V.
L.
O.
) is designed to operated with 0.
17mA typ.
start-up current, allowing an efficient bootstrap supply voltage design.
The U.
V.
L.
O.
thresholds for the MIK3842A/44A are 16V (on) and 10V (off) which are ideal for off-line applications.
The corresponding typical threshold for the MIK3843A/45A is 8.
4V (on) and 7.
6V (off).
The MIK3842A/43A can operated within 100% duty cycle and the MIK3844A/45A can operated within 50% duty cycle.
Features  Low Start-Up and Operating Current  Automatic Feed Forward Compensation  Current Mode Operating Frequency up to 500KHz  Trimmed Oscillator Discharge Current for Precise Duty Cycle Control  Latching PWM for Cycle-By-Cycle Current Limiting  Under Voltage Lockout with Hysteresis  High Current totem Pole Output Stage Available Options Device Start-UP Hysteresis Voltage MIK3842A MIK3843A MIK3844A MIK3845A 16V 8.
4V 16V 8.
4V 6V 0.
8V 6V 0.
8V Max.
Duty Cycle < 100% < 100% < 50% < 50% Application  Off-line flyback or forward converters  DC to DC buck/boost converter  Monitor Power Supply Rev.
1.
0 – May, 2013, preliminary specification 1 © 2013 Mikron MIK3842A, MIK3843A MIK3844A, MIK3845A CURRENT MODE PWM CONTROLLER Marking Information and Pin Configurations (Top View) A: Assembly / Test site code Y: Year WW: Week Ordering Information Ordering Number MIK3842AD8T MIK3842AS8T MIK3842AS8R MIK3843AD8T MIK3843AS8T MIK3843AS8R MIK3844AD8T MIK3844AS8T MIK3844AS...


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