APW7199
Pin Description
PIN
NO.
NAME
FUNCTION
This pin provides ground referenced bias voltage to the high-side MOSFET driver. A bootstrap
1
BOOT
circuit with a diode connected to 5V is used to create a voltage suitable to drive a logic-level
N-channel MOSFET.
2
UGATE
Connect this pin to the high-side N-channel MOSFET’s gate. This pin provides gate drive for the
high-side MOSFET.
3
PHASE
The pin provides return path for the high-side MOSFET driver’s pull-low current. Connect this pin
to the high-side MOSFET’s source.
The GND terminal provides return path for the IC’s bias current and the low-side MOSFET
4
GND
driver’s pull-low current. Connect the pin to the system ground via very low impedance layout on
PCBs.
5
LGATE/OCSET
Low-side Gate Driver Output and Over-Current Setting Input. This pin is the gate driver for
low-side MOSFET.
Connect this pin to a 5V supply voltage. This pin provides bias supply for the control circuitry and
6
VCC
the low-side MOSFET driver. The voltage at this pin is monitored for the Power-On-Reset (POR)
purpose. Decoupling capacitor (4.7µF) be connected to GND for noise decoupling.
Output Voltage Feedback pin. This pin is connected to the resistive divider that set the desired
7
FB
output voltage. The POK, UVP, and OVP circuits detect this signal to report output voltage
status.
8
VOUT
The VOUT pin makes a direct measurement of the converter output voltage. The VOUT pin
should be connected to the top feedback resistor at the converter output.
9
POK
POK is an open drain output used to indicate the status of the output voltage. Connect the POK
pin to +5V through a pull-high resistor.
10
EN/EXTREF Enable/Shutdown Pin or External Reference Selection of The PWM Controller.
Copyright © ANPEC Electronics Corp.
11
Rev. A.4 - Oct., 2010
www.anpec.com.tw