HIP6008CB 查看數據表（PDF） - Intersil

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HIP6008CB

Buck Pulse-Width Modulator (PWM) Controller and Output Voltage Monitor

Intersil 

HIP6008

Typical Performance Curves

1000

100

RT PULLUP

TO +12V

10

RT PULLDOWN

TO VSS

10

100

1000

SWITCHING FREQUENCY (kHz)

FIGURE 1. RT RESISTANCE vs FREQUENCY

Functional Pin Description

OCSET 1

SS 2

VID0 3

VID1 4

VID2 5

VID3 6

COMP 7

FB 8

16 VSEN

15 RT/OVP

14 VCC

13 BOOT

12 UGATE

11 PHASE

10 PGOOD

9 GND

OCSET (Pin 1)

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

upper MOSFET. ROCSET, an internal 200µA current source

(IOCS), and the upper MOSFET on-resistance. (rDS(ON)) set

the converter over-current (OC) trip point according to the

following equation:

IPEAK = I--O-----C----Sr--D---•--S--R-(---O-O---N-C---)--S----E---T--

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

SS (Pin 2)

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.

VID0-3 (Pins 3-6)

VID0-3 are the input pins to the 4-bit DAC. The states of

these four pins program the internal voltage reference

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

voltage. It also sets the PGOOD and OVP thresholds. Table

1 specifies DACOUT for the 16 combinations of DAC inputs.

4

40

35

30

CUGATE = 3300pF

25

20

15

CUGATE = 1000pF

10

5

CUGATE = 10pF

0

100 200 300 400 500 600 700 800 900 1000

SWITCHING FREQUENCY (kHz)

FIGURE 2. BIAS SUPPLY CURRENT vs FREQUENCY

COMP (Pin 7) and FB (Pin 8)

COMP and FB are the available external pins of the error

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

amplifier and the COMP pin is the error amplifier output.

These pins are used to compensate the voltage-control

feedback loop of the converter.

GND (Pin 9)

Signal ground for the IC. All voltage levels are measured with

respect to this pin.

PGOOD (Pin 10)

PGOOD is an open collector output used to indicate the

status of the converter output voltage. This pin is pulled low

when the converter output is not within ±10% of the

DACOUT reference voltage.

PHASE (Pin 11)

Connect the PHASE pin to the upper MOSFET source. This

pin is used to monitor the voltage drop across the MOSFET

for over-current protection. This pin also provides the return

path for the upper gate drive.

UGATE (Pin 12)

Connect UGATE to the upper MOSFET gate. This pin

provides the gate drive for the upper MOSFET.

BOOT (Pin 13)

This pin provides bias voltage to the upper MOSFET driver.

A bootstrap circuit may be used to create a BOOT voltage

suitable to drive a standard N-Channel MOSFET.

VCC (Pin 14)

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

RT/OVP (Pin 15)

This pin is multiplexed, providing two functions. The first

function is oscillator switching frequency adjustment. By

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