LTC6992HS6-4-WTRMPBF 查看數據表（PDF） - Analog Devices

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LTC6992HS6-4-WTRMPBF

TimerBlox: Voltage-Controlled Pulse Width Modulator (PWM)

Analog Devices 

FEATURES

n Pulse Width Modulation (PWM) Controlled by

Simple 0V to 1V Analog Input

n Four Available Options Define Duty Cycle Limits

n Minimum Duty Cycle at 0% or 5%

n Maximum Duty Cycle at 95% or 100%

n Frequency Range: 3.81Hz to 1MHz

n Configured with 1 to 3 Resistors

n <1.7% Maximum Frequency Error

n PWM Duty Cycle Error < 3.7% Maximum

n Frequency Modulation (VCO) Capability

n 2.25V to 5.5V Single Supply Operation

n 115μA Supply Current at 100kHz

n 500μs Start-Up Time

n CMOS Output Driver Sources/Sinks 20mA

n –55°C to 125°C Operating Temperature Range

n Available in Low Profile (1mm) SOT-23 (ThinSOT™)

and 2mm × 3mm DFN

n AEC-Q100 Qualified for Automotive Applications

APPLICATIONS

n PWM Servo Loops

n Heater Control

n LED Dimming Control

n High Vibration, High Acceleration Environments

n Portable and Battery-Powered Equipment

All registered trademarks and trademarks are the property of their respective owners.

LTC6992-1/LTC6992-2/

LTC6992-3/LTC6992-4

TimerBlox:

Voltage-Controlled Pulse

Width Modulator (PWM)

DESCRIPTION

The LTC®6992 is a silicon oscillator with an easy-to-use

analog voltage-controlled pulse width modulation (PWM)

capability. The LTC6992 is part of the TimerBlox® family

of versatile silicon timing devices.

A single resistor, RSET, programs the LTC6992’s inter-

nal master oscillator frequency. The output frequency

is determined by this master oscillator and an internal

frequency divider, NDIV, programmable to eight settings

from 1 to 16384.

fOUT

=

1MHz

NDIV

•

50kΩ

RSET

, NDIV

=

1,4,16

…16384

Applying a voltage between 0V and 1V on the MOD pin

sets the duty cycle.

The four versions differ in their minimum/maximum duty

cycle. Note that a minimum duty cycle limit of 0% or

maximum duty cycle limit of 100% allows oscillations to

stop at the extreme duty cycle settings.

DEVICE NAME

LTC6992-1

LTC6992-2

LTC6992-3

LTC6992-4

PWM DUTY CYCLE RANGE

0% to 100%

5% to 95%

0% to 95%

5% to 100%

For easy configuration of the LTC6992, use the TimerBlox

LTC6992: PWM Web-Based Design Tool.

TYPICAL APPLICATION

1MHz Pulse Width Modulator

ANALOG PWM

DUTY CYCLE

CONTROL

(0V TO 1V)

MOD OUT

LTC6992

GND

V+

SET

RSET

50k

DIV

6992 TA01a

3.3V

C1

0.1µF

MOD

0.5V/DIV

OUT

1V/DIV

Document Feedback

For more information www.analog.com

2µs/DIV

6992 TA01b

Rev. D

1

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