nx2113 Microsemi Corporation, nx2113 Datasheet - Page 4

• Manufacturer Part Number: nx2113
• Description: 300khz & 600khz Synchronous Pwm Controller With Programmable Bus Uvlo
• Manufacturer: Microsemi Corporation

PIN DESCRIPTIONS
Rev. 2.0
11/18/05
PIN #
10
1
2
3
4
5
6
7
8
9
PIN SYMBOL
BST
HDRV
PGND/Gnd
LDRV
PVcc
Vcc
EN
FB
COMP
SW
This pin supplies voltage to the high side driver. A high frequency
ceramic capacitor of 0.1 to 1 uF must be connected from this pin to SW pin.
High side MOSFET gate driver.
Power and analog ground pin. For MLPD package, analog ground and power ground
are separated, additional pad pin(11) is available for analog ground.
Low side MOSFET gate driver.
Ldrv supply voltage. A 1uF high frequency cap must be connected from this pin to
GND directly.
Voltage supply for the internal circuit as well as the low side MOSFET gate driver. A
1uF high frequency ceramic capacitor must be connected from this pin to GND pin.
Pull up this pin to Vcc for normal operation. Pulling this pin down below 1.25V
shuts down the controller and resets the soft start. This pin can also be used as
a UVLO detector for the bus voltage via a resistor divider.
This pin is the error amplifier inverting input. This pin is also connected to the output
UVLO comparator. When this pin falls below 0.4V, both HDRV and LDRV outputs
are latched off.
This pin is the output of the error amplifier and together with FB pin is used to
compensate the voltage control feedback loop.
This pin is connected to the source of the high side MOSFET and provides return
path for the high side driver.
PIN DESCRIPTION
NX2113/2113A
4