NCP1236AD65R2G ON Semiconductor, NCP1236AD65R2G Datasheet - Page 15

• Manufacturer Part Number: NCP1236AD65R2G
• Description: IC CTLR CURR MODE 65KHZ 7-SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1236AD65R2G

• Frequency - Max: 70kHz
• Pwm Type: Current Mode
• Number Of Outputs: 1
• Duty Cycle: 85%
• Voltage - Supply: 9.5 V ~ 28 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 8-SOIC (0.154", 3.90mm Width) 7 leads
• Duty Cycle (max): 85 %
• Output Current: 500 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 65 KHz
• Operating Supply Voltage: - 0.3 V to + 28 V
• Supply Current: +/- 30 mA
• Maximum Operating Temperature: + 125 C
• Fall Time: 40 ns
• Minimum Operating Temperature: - 40 C
• Rise Time: 40 ns
• 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.