NCP1397ADR2G ON Semiconductor, NCP1397ADR2G Datasheet - Page 18

• Manufacturer Part Number: NCP1397ADR2G
• Description: IC CTLR RESONANT HI PERF 16-SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1397ADR2G

• Pwm Type: Controller
• Number Of Outputs: 1
• Frequency - Max: 560kHz
• Duty Cycle: 52%
• Voltage - Supply: 10.3 V ~ 20 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SOIC (3.9mm Width, 15 Leads)
• Frequency-max: 560kHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Brown−Out protection
resonant converter from low DC input voltages. Below a
given level, the controller blocks the output pulses, above it,
it authorizes them. The internal circuitry, depicted by
Figure 40, offers a way to observe the high−voltage (HV)
rail. A resistive divider made of R
portion of the HV rail on Pin 5. Below the turn−on level, the
28 mA current source IBO is off. Therefore, the turn−on
level solely depends on the division ratio brought by the
resistive divider.
The Brown−Out circuitry (BO) offers a way to protect the
−4.00
−8.00
4.00
3.00
2.00
1.00
16.0
12.0
8.00
4.00
8.00
4.00
0
0
0
56.2 m
A − B
upper
Clock Pulses
Ct Voltage
and R
Figure 39. Typical Oscillator Waveforms
DT
65.9 m
lower
, brings a
http://onsemi.com
time in seconds
18
75.7 m
Figure 40. The Internal Brown−out Configuration with
DT
DT
Rupper
Rlower
an Offset Current Source
Vbulk
85.4 m
IBO
BO
V
DD
+
VBO
ON/OFF
+
−
95.1 m
BO