NCP1378DR2G ON Semiconductor, NCP1378DR2G Datasheet - Page 2

• Manufacturer Part Number: NCP1378DR2G
• Description: IC CTRLR PWM CM OVP UVLO 8SOIC
• Manufacturer: ON Semiconductor

Specifications of NCP1378DR2G

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 100kHz
• Voltage - Supply: 8.2 V ~ 18 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 125°C
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 100kHz
• Output Voltage: 16 V
• Output Current: 500 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 100 KHz
• Operating Supply Voltage: 18 V
• Maximum Operating Temperature: + 150 C
• Fall Time: 20 ns
• Rise Time: 40 ns
• Synchronous Pin: No
• Topology: Flyback
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Duty Cycle: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NCP1378DR2GOS; NCP1378DR2GOS; NCP1378DR2GOSTR

Universal
Network
PIN FUNCTION DESCRIPTION
Pin
1
2
3
4
5
6
7
8
Symbol
Demag
GND
V
Drv
NC
CS
HV
FB
CC
*Please refer to the application information section.
Core reset detection and OVP
Sets the peak current setpoint
Current sense input and skip
+
cycle level selection
High- -voltage pin
Supplies the IC
The IC ground
Driving pulses
Function
OVP and
Demag
- -
Figure 1. Typical Application Schematic
1
2
3
4
NCP1378
http://onsemi.com
The auxiliary FLYBACK signal ensures discontinuous operation and offers a
fixed overvoltage detection level of 5.2 V.
By connecting an optocoupler to this pin, the peak current setpoint is
adjusted accordingly to the output power demand. By bringing this pin below
the internal skip level, you shut off the device.
This pin senses the primary current and routes it to the internal comparator
via an L.E.B. By inserting a resistor in series with the pin, you control the
level at which the skip operation takes place.
The driver’s output to an external MOSFET.
This pin is connected to an external bulk capacitor of typically 47 mF.
This unconnected pin ensures adequate creepage distance.
Connected to the high- -voltage rail, this pin injects a constant current into the
V
- -
CC
8
7
6
5
bulk capacitor and ensures a clean lossless startup sequence.
2
R*
+
Description
Y1 Type
+
12 V @ 1 A
GND