LM3406HVEVAL National Semiconductor, LM3406HVEVAL Datasheet - Page 15

• Manufacturer Part Number: LM3406HVEVAL
• Description: LM3406/06HV 1.5A Constant Current Buck Regulator for Driving High Power LEDs; Qty per Container: 1/
• Manufacturer: National Semiconductor

CS PIN PROTECTION WITH OVP
When designing output overvoltage protection into the switch-
ing converter circuit using a zener diode, transient protection
on the CS pin requires additional consideration. As shown in
Figure
(with the series resistor) for output overvoltage protection will
9, adding a zener diode from the output to the CS pin
FIGURE 10. CS Pin with OVP, Transient Path with Protection
FIGURE 9. CS Pin with OVP, Transient Path
15
now again allow the transient energy to be passed through
the CS pin’s ESD structure thereby damaging it.
Adding an additional series resistor to the CS pin as shown
in
to pass through the sense resistor thereby protecting the
LM340X device.
Figure 10
will result in the majority of the transient energy
30020366
30020367
www.national.com