LD7577JAGS 데이터 시트보기 (PDF) - Unspecified

부품명

상세내역

제조사

LD7577JAGS

High Voltage Green-Mode PWM Controller with Brown-Out Protection

Unspecified 

Protection Resistor on the Hi-V Path

In some other Hi-V processes and designs, there is

probably some parasitic SCR caused around HV pin, VCC

and GND. As shown in figure 24, a small negative spike

in the HV pin may trigger this parasitic SCR and cause the

latchup between VCC and GND. Such latchup will

damage the chip easily because of the equivalent

short-circuit induced.

The LD7577JA has eliminated the parasitic SCR

efficiently. Figure 25 shows the equivalent circuit of the

LD7577JA’s Hi-V structure. It illustrates the LD7577JA is

capable to sustain negative voltage and superior than

similar products. Even though, a 40KΩ resistor is still

recommended to be placed on the Hi-V path.

LD7577JA

Fig. 24

Fig. 25

Leadtrend Technology Corporation

LD7577JA-DS-00b August 2010

15

www.leadtrend.com.tw

Share Link: