RES

SS

LO

HO

5V

t1

Current Limit Detected

at CS

2.5V

0V

+110 PA

+1 PA

t2

t3

#1V

CLK

Q

S

R

Drivers Off

SS

PWM

COMP

CS

RES

LM5035C

SS

Drivers Off

Voltage

Feedback

Current

Sense

Circuit

CRES

Restart

Comparator

Restart

Latch

2.5V

5V

Restart

Current

Source

Logic

SS

Logic

To Output

Drivers

Current

Limit

0.25 V

CSS

100 mV

110 PA

110 PA

1 PA

22 PA

12 PA

Copyright © 2016, Texas Instruments Incorporated

16

LM5035C

SNVS631D – JANUARY 2010 – REVISED OCTOBER 2016

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Product Folder Links: LM5035C

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Copyright © 2010–2016, Texas Instruments Incorporated

Feature Description (continued)

configuration are that a short term overload will not cause a hiccup mode restart but during extended

overload conditions, the average dissipation of the power converter will be very low.

4. Externally Controlled Hiccup: The RES pin can also be used as an input. By externally driving the pin to a

level greater than the 2.5-V hiccup threshold, the controller will be forced into the delayed restart sequence.

For example, the external trigger for a delayed restart sequence could come from an overtemperature

protection circuit or an output overvoltage sensor.

Figure 11. Current Limit Restart Circuit

Figure 12. Current Limit Restart Timing