ld7578j Leadtrend Technology, ld7578j Datasheet - Page 14

• Manufacturer Part Number: ld7578j
• Description: High Voltage Green-mode Pwm Controller With Over Temperature Protection
• Manufacturer: Leadtrend Technology

LD7578J
GND.
And such latchup will easily damage the chip
because of the equivalent short-circuit induced.
With the Leadtrend’s proprietary Hi-V technology, there is
no such parasitic SCR in LD7578J.
Fig. 23 shows the
equivalent circuit of LD7578J’s Hi-V structure.
The
LD7578J has higher capability to sustain negative voltage
than similar products. Nevertheless, a 40KΩ resistor is
recommended to implement on the Hi-V path as a current
limit resistor no matter what negative voltage is present in
any situation.
Fig. 23
Fig. 22
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Leadtrend Technology Corporation
www.leadtrend.com.tw
LD7578J-DS-00 March 2009