RS2030 Orister Corporation, RS2030 Datasheet - Page 5

• Manufacturer Part Number: RS2030
• Description: Lowest Cost Greenpower Offline Pwm Controller
• Manufacturer: Orister Corporation

The current flowing by the power BJT has an extra value
sense pin to power BJT cut off in the RS2030 (Among these, V
inductance, V
dynamic peak limit circuit to compensate the system delay T
Soft Start
The V
decreasing. The soft start performance have been implemented by increasing the duty cycle in starting.
Leading‐edge Blanking (LEB)
Each time the power BJT is switched on, a turn‐on spike will inevitably occur at the sense pin, which would disturb the internal signal from
the sampling of the R
cannot be switched off during this time. So that the conventional external RC filtering on sense input is no longer required.
Short Circuit Protection (SCP)
When the output circuit is shorted, the restart time of the RS2030 and the input power will be increased with input voltage increasing, then
the power NPN BJT will be hot and destroyed. So the Orister secondary delay circuit has been introduced for decrease the restart time.
DS‐RS2030‐13 September, 2009
DD
pin of the RS2030 is the power supply voltage pin and the feedback pin, so the duty cycle will be increase with V
IN
ranges from 85V
SENSE
. There is a 250ns leading edge blanking time built in to avoid the effect of the turn‐on spike and the power BJT
AC
to 264V
AC
.) To guarantee the output power is a constant for universal input AC voltage, there is a
Δ
D
that the system delay brings on.
IN
I
=
is the primary winding voltage of the transformer and L
V
L
IN
P
×
T
D
due to the system delay T
D
that the current detected from the
P
is the primary wind
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DD
voltage