Datasheet > ISL6611A

ISL6611A

更新时间： 2024-11-05 05:39:43

品牌	Logo	应用领域
英特矽尔 - INTERSIL		驱动器
页数	文件大小	规格书
14页	298K
描述
Phase Doubler with Integrated Drivers Phase Doubler with Integrated Drivers

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ISL6611A 数据手册

ISL6611A

Data Sheet

March 19, 2009

FN6881.0

Phase Doubler with Integrated Drivers

and Phase Shedding Function

Features

• Proprietary Phase Doubler Scheme with Phase Shedding

Function (Patent Pending)

The ISL6611A utilizes Intersil’s proprietary Phase Doubler

scheme to modulate two-phase power trains with single

PWM input. It doubles the number of phases that Intersil’s

ISL63xx multiphase controllers can support. At the same

time, the PWM line can be pulled high to disable the

corresponding phase or higher phase(s) when the enable

pin (EN_PH) is pulled low. This simplifies the phase

shedding implementation. For layout simplicity and

improving system performance, the device integrates two 5V

drivers (ISL6609) and current balance function.

- Enhanced Light to Full Load Efficiency

• Patented Current Balancing with r

and Adjustable Gain

Current Sensing

DS(ON)

• Quad MOSFET Drives for Two Synchronous Rectified

Bridge with Single PWM Input

• Channel Synchronization and Interleaving Options

• Adaptive Zero Shoot-Through Protection

• 0.4Ω On-Resistance and 4A Sink Current Capability

• 36V Internal Bootstrap Schottky Diode

The ISL6611A is designed to minimize the number of analog

signals interfacing between the controller and drivers in high

phase count and scalable applications. The common COMP

signal, which is usually seen with conventional cascaded

configuration, is not required; this improves noise immunity

and simplifies the layout. Furthermore, the ISL6611A

provides low part count and a low cost advantage over the

conventional cascaded technique.

• Bootstrap Capacitor Overcharging Prevention (ISL6611A)

• Supports High Switching Frequency (Up to 1MHz)

- Fast Output Rise and Fall

• Tri-State PWM Input for Output Stage Shutdown

• Phase Enable Input and PWM Forced High Output to

Interface with Intersil’s Controller for Phase Shedding

The IC is biased by a single low voltage supply (5V),

minimizing driver switching losses in high MOSFET gate

capacitance and high switching frequency applications.

Bootstrapping of the upper gate driver is implemented via an

internal low forward drop diode, reducing implementation

cost, complexity, and allowing the use of higher

performance, cost effective N-Channel MOSFETs. Adaptive

shoot-through protection is integrated to prevent both

MOSFETs from conducting simultaneously.

• QFN Package

- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat

No Leads-Product Outline

- Near Chip-Scale Package Footprint; Improves PCB

Utilization, Thinner Profile

- Pb-Free (RoHS Compliant)

Applications

The ISL6611A features 4A typical sink current for the lower

gate driver, enhancing the lower MOSFET gate hold-down

capability during PHASE node rising edge, preventing power

loss caused by the self turn-on of the lower MOSFET due to

the high dV/dt of the switching node.

• High Current Low Voltage DC/DC Converters

• High Frequency and High Efficiency VRM and VRD

• High Phase Count and Phase Shedding Applications

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

The ISL6611A also features an input that recognizes a

high-impedance state, working together with Intersil

multiphase PWM controllers to prevent negative transients

on the controlled output voltage when operation is

suspended. This feature eliminates the need for the Schottky

diode that may be utilized in a power system to protect the

load from negative output voltage damage.

In addition, the ISL6611A’s bootstrap function is designed to

prevent the BOOT capacitor from overcharging, should

excessively large negative swings occur at the transitions of

the PHASE node.

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.

All other trademarks mentioned are the property of their respective owners.

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与ISL6611A相关器件

型号	品牌	获取价格	描述	数据表
ISL6611A_13	INTERSIL	获取价格	Phase Doubler with Integrated Drivers and Phase Shedding Function
ISL6611ACRZ	INTERSIL	获取价格	Phase Doubler with Integrated Drivers Phase Doubler with Integrated Drivers
ISL6611AIRZ	INTERSIL	获取价格	Phase Doubler with Integrated Drivers Phase Doubler with Integrated Drivers
ISL6612	INTERSIL	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features
ISL6612	RENESAS	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features
ISL6612_07	INTERSIL	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features
ISL6612A	INTERSIL	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP
ISL6612A	RENESAS	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP
ISL6612A_06	INTERSIL	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP
ISL6612ACB	INTERSIL	获取价格	Advanced Synchronous Rectified Buck MOSFET Drivers with Pre-POR OVP

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