SM74202 Datasheet, PDF (1/12 Pages) Texas Instruments – 100V Current Mode PWM Controller

SM74202
www.ti.com
SNOSBA4A – NOVEMBER 2011 – REVISED APRIL 2013
100V Current Mode PWM Controller
Check for Samples: SM74202
FEATURES
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•2 Renewable Energy Grade
• Internal Start-up Bias Regulator
• Error Amplifier
• Precision Voltage Reference
• Programmable Softstart
• 1A Peak Gate Driver
• Maximum Duty Cycle Limiting (50%)
• Programmable Line Under Voltage Lockout
(UVLO) with Adjustable Hysteresis
• Cycle-by-Cycle Over-Current Protection
• Programmable Oscillator Frequency with
Synchronization Capability
• Current Sense Leading Edge Blanking
• Thermal Shutdown Protection
DESCRIPTION
The SM74202 high voltage pulse-width-modulation
(PWM) controller contains all of the features needed
to implement single ended primary power converter
topologies. Output voltage regulation is based on
current-mode control, which eases the design of loop
compensation while providing inherent line feed-
forward. The SM74202 includes a high-voltage start-
up regulator that operates over a wide input range up
to 100V. The PWM controller is designed for high
speed capability including an oscillator frequency
range to 1MHz and total propagation delays less than
100ns. Additional features include an error amplifier,
precision reference, line under-voltage lockout, cycle-
by-cycle current limit, slope compensation, softstart,
oscillator synchronization capability and thermal
shutdown. The controller is available in the MSOP-10
package.
APPLICATIONS
• Photovoltaic
• Telecommunication Power Converters
• Industrial Power Converters
• +42V Automotive Systems
Typical Application Circuit
V_IN
VIN
VCC
V_OUT
UVLO
SM74202
SS
RT/ SYNC
OUT
CS
GND
FB
COMP
COMPENSATION
Figure 1. Non-Isolated Flyback Converter
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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