NCP1236AD100R2G ON Semiconductor, NCP1236AD100R2G Datasheet - Page 15

• Manufacturer Part Number: NCP1236AD100R2G
• Description: IC CTLR CURR MODE 100KHZ 7-SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1236AD100R2G

• Input Voltage: 28V
• No. Of Outputs: 1
• Voltage Regulator Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +125°C
• Svhc: No SVHC (20-Jun-2011)
• Base Number: 1236
• Rohs Compliant: Yes
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

High−Voltage Current Source with Built−in Brown−out
Detection
The NCP1236 HV pin can be connected either to the
rectified bulk voltage, or to the ac line through a rectifier.
Start−up
on the HV pin is higher than V
V
V
proper start−up, i.e. when V
controller actually starts the next time V
between V
current source on and off, it can only be used in light load
CC
CC(min)
At start−up, the current source turns on when the voltage
Even though the DSS is able to maintain the V
reaches V
, until the input voltage is high enough to ensure a
CC(on)
CC(on)
and V
, then turns on again when V
CC(min)
VCC
Figure 30. HV Start−up Current Source Functional Schematic
HV
HV
HV(min)
by turning the HV start−up
reaches V
, and turns off when
CC
reaches V
I
HV(start)
start
DETAILED DESCRIPTION
CC
CC
reaches
voltage
http://onsemi.com
CC(on)
. The
Control
+
+
+
+
V
V
V
V
.
CC(on)
CC(min)
CC(off )
CC(reset)
+
+
+
+
−
−
−
−
15
condition, otherwise the power dissipation on the die would
be too much. As a result, an auxiliary voltage source is
needed to supply V
switching pulses are delivered, e.g. in brown−out condition,
or to prevent the controller from stopping during load
transients when the V
threshold V
t
The DSS is useful to keep the controller alive when no
If the voltage increases above the overvoltage protection
blanking
UVLO(blank)
IC Start
CC(ovp)
Reset
R
S
Q
, the controller is latched off.
CC
CC
during normal operation.
UVLO
TSD
might drop.