NCP1236AD65R2G ON Semiconductor, NCP1236AD65R2G Datasheet - Page 23

• 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

Feedback with Slope Compensation
is 5, meaning that the FB voltage corresponding to V
duty cycle above 50 %, a fixed slope compensation is
internally applied to the current−mode control. The slope
The ratio from the FB voltage to the current sense setpoint
In order to allow the NCP1236 to operate in CCM with a
detector
V
HV(stop)
Peak
I
V
OPC
HV
CS
FB
t
wd
Sample
20 kW
Figure 42. Overpower Compensation
blanking
t
LEB
V
FB(ref)
Figure 43. FB Circuitry
K FB
http://onsemi.com
ILIM
t
wd
Sample
is
+
−
23
3.5 V. There is a pull−up resistor of 20 kW from FB pin to an
internal reference.
appearing on the internal voltage setpoint for the PWM
comparator is −32.5 mV/ms typical for the 65 kHz version,
and −50 mV/ms for the 100 kHz version.
comp.
slope
PWM
t
wd
Sample
Oscillator
Reset
t
HV
Reset
time
time
time