ncp4303a ON Semiconductor, ncp4303a Datasheet - Page 3

• Manufacturer Part Number: ncp4303a
• Description: Ncp4303a/b Secondary Side Synchronous Rectification Driver For High Efficiency Smps Topologies
• Manufacturer: ON Semiconductor

PIN FUNCTION DESCRIPTION
Pin No.
1
2
3
4
5
6
7
8
TRIG/Disable
Pin Name
Min_toff
Min_ton
COMP
GND
VCC
DRV
CS
Compensation inductance
Current sense of the SR
Minimum off time adjust
Minimum on time adjust
Supplies the driver
Forced reset input
Gate driver output
connection
IC ground
Function
MOSFET
Figure 3. Internal Circuit Architecture
http://onsemi.com
V
Adjust the minimum off time period by connecting resistor to ground.
Adjust the minimum on time period by connecting resistor to ground.
This ultrafast input turns off the SR MOSFET in CCM applications. Activates
sleep mode if pulled up for more than 100 ms.
This pin detects if the current flows through the SR MOSFET and/or its body
diode. Basic turn off detection threshold is 0 mV. A resistor in series with this
pin can modify the turn off threshold if needed.
Use as a Kelvin connection to auxiliary compensation inductance. If SR
MOSFET package parasitic inductance compensation is not used (like for
SMT MOSFETs), connect this pin directly to GND pin.
Ground connection for the SR MOSFET driver and V
Ground connection for minimum ton, toff adjust resistors and trigger input.
GND pin should be wired directly to the SR MOSFET source terminal/solder-
ing point using Kelvin connection.
Driver output for the SR MOSFET.
CC
supply terminal of the controller. Accepts up to 30 V continuously.
3
Pin Description
CC
decoupling capacitor.