HV9150K6-G(2013) Ver la hoja de datos (PDF) - Supertex Inc

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componentes Descripción

Fabricante

HV9150K6-G
(Rev.:2013)

High Voltage Output Hysteretic Mode Step Up DC/DC Controller

Supertex Inc 

Functional Block Diagram

VDD

CCP1+/-

CCP2+/-

VLL

3x Charge Pump

Converter

CP

Mode

VLL

LDO

Mode

VDD

LDO

VLL

VDD

HV9150

CP_EN

VCONTROL

(Duty Cycle Adj)

FREQ_ADJ

EN

OSC

VLL

-+

Hysteretic Mode

Controller

Delay

VLL

VREF

GATE

EXT_REF

FB

FP_RTN

CT

GND

Functional Description

Hysteretic Mode Controller

A hysteretic mode controller consists of an oscillator, a

voltage reference, a comparator and a driver. Both the

internal oscillator and the duty cycle of the gate driver are

running at a fixed rate.

As this device is designed for a step up conversion, a pulse

train is used to control the switch of a classical switching

boost converter. The pulse train is gated by the output of

the comparator, which compares the feedback of the output

voltage with the voltage reference.

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Hysteretic Mode Controller

and a Classical Boost Converter

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If the output voltage reaches the target voltage, the

comparator will turn off the pulse train. When the output

voltage drops below the target voltage, the comparator

will pass the pulse train to the switch and start the inductor

charging cycle. The advantage of this hysteretic mode

controller is its stability and simple operation.

Internal Oscillator

This device has an internal oscillator which generates the

reference clock for the hysteretic mode controller. The

controller is running at half of the frequency of the internal

oscillator. This oscillator is powered by the VLL power supply

pin.

Doc.# DSFP-HV9150

NR120213

Supertex inc.

5

www.supertex.com

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