HIP6018B Ver la hoja de datos (PDF) - Intersil

Número de pieza

componentes Descripción

Lista de partido

HIP6018B

Advanced PWM and Dual Linear Power Control

Intersil 

HIP6018B

Functional Pin Description

VSEN1 (Pin 19)

This pin is connected to the PWM converter’s output voltage.

The PGOOD and OVP comparator circuits use this signal to

report output voltage status and for over voltage protection.

OCSET1 (Pin 20)

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

upper MOSFET. ROCSET, an internal 200μA current source

(IOCSET), and the upper MOSFET on-resistance (rDS(ON))

set the PWM converter over-current (OC) trip point

according to the following equation:

IPEAK = I--O-----C----S----Er--D--T---S--×-(---OR----N-O---)-C-----S----E---T--

An over-current trip cycles the soft-start function. Sustaining

an over-current for 2 soft-start intervals shuts down the

controller.

SS (Pin 9)

Connect a capacitor from this pin to ground. This capacitor,

along with an internal 11μA (typically) current source, sets

the soft-start interval of the converter. Pulling this pin low

with an open drain signal will shut down the IC.

VID0, VID1, VID2, VID3, VID4 (Pins 6, 5, 4, 3 and 2)

VID0-4 are the input pins to the 5-bit DAC. The states of

these five pins program the internal voltage reference

(DACOUT). The level of DACOUT sets the core converter

output voltage. It also sets the core PGOOD and OVP

thresholds.

COMP1 and FB1 (Pins 17 and 18)

COMP1 and FB1 are the available external pins of the PWM

error amplifier. The FB1 pin is the inverting input of the error

amplifier. Similarly, the COMP1 pin is the error amplifier

output. These pins are used to compensate the voltage-

control feedback loop of the PWM converter.

GND (Pin 14)

Signal ground for the IC. All voltage levels are measured

with respect to this pin.

PGOOD (Pin 7)

PGOOD is an open collector output used to indicate the

status of the output voltages. This pin is pulled low when the

core output is not within ±10% of the DACOUT reference

voltage and the other outputs are below their under-voltage

thresholds. The PGOOD output is open for ‘11111’ VID

code. See Table 1.

PHASE1 (Pin 23)

Connect the PHASE pin to the PWM converter’s upper

MOSFET source. This pin is used to monitor the voltage

drop across the upper MOSFET for over-current protection.

UGATE1 (Pin 24)

Connect UGATE pin to the PWM converter’s upper

MOSFET gate. This pin provides the gate drive for the upper

MOSFET.

PGND (Pin 21)

This is the power ground connection. Tie the PWM

converter’s lower MOSFET source to this pin.

LGATE1 (Pin 22)

Connect LGATE1 to the PWM converter’s lower MOSFET

gate. This pin provides the gate drive for the lower MOSFET.

VCC (Pin 1)

Provide a 12V bias supply for the IC to this pin. This pin

also provides the gate bias charge for all the MOSFETs

controlled by the IC.

RT (Pin 10)

This pin provides oscillator switching frequency adjustment.

By placing a resistor (RT) from this pin to GND, the nominal

200kHz switching frequency is increased according to the

following equation:

Fs ≈ 200kHz + R-5----T-×---(--1k---0-Ω---6--)

(RT to GND)

Conversely, connecting a pull-up resistor (RT) from this pin

to VCC reduces the switching frequency according to the

following equation:

Fs ≈ 200kHz – -R4----T-×---(--1k---0-Ω---7--)

(RT to 12V)

FAULT (Pin 8)

This pin is low during normal operation, but it is pulled to VCC

in the event of an over-voltage or over-current condition.

DRIVE3 (Pin 15)

Connect this pin to the gate of an external MOSFET. This

pin provides the drive for the linear controller’s pass

transistor.

FB3 (Pin 16)

Connect this pin to a resistor divider to set the linear

controller output voltage.

VOUT2 (Pin 13)

Output of the linear regulator. Supplies current up to 230mA.

FB2 (Pin 11)

Connect this pin to a resistor divider to set the linear

regulator output voltage.

VIN2 (Pin 12)

This pin supplies power to the internal regulator. Connect

this pin to a suitable 3.3V source.

Additionally, this pin is used to monitor the 3.3V supply. If,

following a startup cycle, the voltage drops below 2.55V

(typically), the chip shuts down. A new soft-start cycle is

6

Share Link: