APW7016 Ver la hoja de datos (PDF) - Anpec Electronics

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APW7016

Advanced PWM Power Controller

Anpec Electronics 

APW7016

Pin Function Description

VSEN (pin 1)

Connect this pin to the converter’s voltage output.

The OVP comparator circuits monitor output voltage

status and act over voltage protection by using this

signal.

OCSET(pin 2)

Connect a resistor(ROCSET) from this pin to the drain

of the upper MOSFET. An internal 200µA current

source (IOCS), ROCSET, and the upper MOSFET’s on-

resistance (RDS(ON)) set the converter over-current

(OC) trip point according to the following equation :

IPEAK=

IOCSET * ROCSET

rDS(ON)

An over-current trip resets the soft-start function.

SS (Pin 3)

Connect a capacitor from this pin to ground. This

capacitor, along with an internal 10µA current source,

sets the soft-start interval of the converter.

PHASE (pin 10)

Connect the PHASE pin to the source of the upper

MOSFET. This pin is used to monitor the voltage

drop across the upper MOSFET for over-current

protection.

UGATE (pin 11)

Connect UGATE to the upper MOSFET gate. This

pin enables the gate drive signal to drive the upper

MOSFET .

BOOT (pin 12)

BOOT pin provides bias voltage to the upper

MOSFET gate driver. A bootstrap circuit could be

used to pump a BOOT voltage for enforcing the driv-

ing capability of the gate driver and improving the

performance of the upper MOSFET.

PGND(pin 13)

PGND pin provides the power ground connection.

Connect this pin to the source of the lower MOSFET.

VID0-2 (Pins 4-6)

LGATE (pin 14)

VID0-2 are the input pins to the 3-bit DAC. The states

of these three pins decide the internal voltage refer-

ence (DACOUT). The level of DACOUT sets the con-

verter output voltage and also sets the OVP

thresholds. Table 1 specifies DACOUT for the 8 com-

binations of DAC inputs.

COMP (pin 7) and FB (pin 8)

Connect LGATE to the lower MOSFET gate. This pin

enables the gate drive signal to drive the lower

MOSFET.

VCC (pin 15)

Connect VCC to 12V voltage supply. This pin sup-

plies the bias for the chip.

COMP and FB are the accessiable pins of the error

amplifier. FB pin is the inverting input of the error

amplifier and COMP pin is output of the error amplifier.

These pins provide the compensation for the volt-

age-control feedback loop of the converter.

GND (Pin 9)

GND is signal ground of the IC. All voltage levels are

measured with respect to this pin.

RT (pin 16)

RT pin provides oscillator switching frequency

adujstment. By connecting a resistor (RT) from this

pin to GND, the nominal 200kHz switching frequency

is increased. Conversely. connecting a pull-up re-

sistor (R ) from this pin to V reduces the switching

T

CC

frequency.

Copyright  ANPEC Electronics Corp.

4

Rev. A.1 - Oct., 2002

www.anpec.com.tw

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