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What is RM6203?

This electronic component, produced by the manufacturer "Reactor", performs the same function as "High Performance Current Mode PWM Switching Power Supply Controller".


RM6203 Datasheet PDF - Reactor

Part Number RM6203
Description High Performance Current Mode PWM Switching Power Supply Controller
Manufacturers Reactor 
Logo Reactor Logo 


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RM6203
High Performance Current Mode PWM Switching Power Supply controller
DESCRIPTION
The RM6203 is a current mode PWM switching power
supply controller that specifically designed for AC/DC
converter with high performance versus cost ratio. It provides
continuous output power up to 12W in the broad voltage range
of 85V – 265V.Its optimized and highly reasonable circuit
design has made it possible to minimize the total cost of the
product. This power supply controller could be used in typical
flyback circuit topology to constitute simple AC/DC converter.
The internal initiating circuit of RM6203 has been designed
with a unique means of current sink to complete the startup
using the amplifying function of the power switching tube. This
will significantly reduce the power consumption of the start-up
resistor; and when the output power becomes smaller,
RM6203 will automatically lower its operating frequency to
enable very low standby power consumption.
When the power tube stops, the internal circuit will turn
the power tube reverse bias to greatly raise the voltage
resistant capacity of OC pin. This will ensure the safety of the
power tube. The internal design of the RM6203 is also
provided with over-load and saturation preventive function
capable of preventing disorders such as overload, transformer
saturation and output short-circuit, so as to increase the
reliability of the power supply. A voltage reference of 2.5V is
also integrated in the RM6203 to provide accurate power
supply to the clock circuit, and the clock frequency may be set
by external timing capacitance. Presently, standard DIP8
package and environmental friendly lead-free package in
compliance with European standard can be supplied.
FEATURES
Built-in 700V high voltage power switching tube with
minimal external parts count
Latched PWM and pulse-by-pulse current limiting
inspection
Reduced frequency at low output with standby power
consumption below 0.25W
Built-in slope and feedback compensation function
Separate upper limit current inspection controller to
handle timely the over-current and overload of the controller
Turn off periodic bias output of the emitter to improve the
voltage resistance of the power tube
Built-in thermal protective circuit
Complete start-up using amplification of the switching
power tube to reduce the power consumption of the start-up
resistor more than ten times
Automatic VCC over-voltage limit
Broad voltage output power up to 5W and narrow voltage
output power up to 8W
Applications
Power Adaptors(traveling chargers ,stand-alone power
set)
Internal power supply for Energy-Saving Appliances (such
as electromagnetic oven, microwave oven and etc.)
www.reactor-micro.com
1

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RM6203 equivalent
open current will increase along with IS linearly, when IS raises
www.Dtoata0S.6hVee, t4thUe.coOmB open current is approximately 100mA, this
feature will effectively utilize the output current of OB and lower
the power consumption of RM6203), if IS detects the specified
current of FB, it goes into close period; in the close period, OB
pulls down, the power tube may not be turned off immediately,
but OE clamps on 2.0V (after the power tube turns off, the
base will be reverse bias and the voltage withstanding
capacity is increased); in the open or close period, if it detects
the current exceeding upper limit of the power tube, then the
upper limit flip-flop will be put at the preferential position,
forcing FB to decrease and the duty ratio will turn smaller, so
that the power tube and transformer will be protected; at the
RM6203
beginning of next close period edge or if FB is below 1.8V, the
upper limit flip-flop will reset. Besides, the built-in heat
protection of RM6203 will widen the oscillator period when the
internal temperature is above 125 to ensure the
temperature of RM6203 will not exceed 135; the built-in
slope compensation will stabilize the open/close period when
RM6203 is at high duty ratio or in continuous current mode.
When VCC lowers to about 4.4V, the oscillator will be
closed, OSC1 and OSC2 will be at low level, and the power
source will be maintained at close period; when VCC goes on
lowering to about 3.8V, RM6203 will enter the enabling stage
again.
Normal Stage Switching Cycle Oscillogram
Global Oscillogram
www.reactor-micro.com
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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for RM6203 electronic component.


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1. PWM Switching Power Supply Controller

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