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LTC6992IDCB6-1-PBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC6992IDCB6-1-PBF Datasheet(HTML) 1 Page - Linear Technology |
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1 / 32 page  Electrical Specifications Subject to Change LTC6992-1/-2/-3/-4 1 69921234p TYPICAL APPLICATION DESCRIPTION TimerBlox Voltage-Controlled Pulse Width Modulator (PWM) 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 • 50k Ω RSET ,NDIV = 1,4,16 …16384 Applying a voltage between 0V and 1V on the MOD pin sets the duty cycle, according to the following formula: Duty Cycle = VMOD 0.8 • VSET − 1 8 ≅ VMOD − 100mV 800mV 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 PWM DUTY CYCLE RANGE OUTPUT DUTY CYCLE LIMITS MIN MAX LTC6992-1 0% to 100% GND V+ LTC6992-2 5% to 95% LTC6992-3 0% to 95% GND LTC6992-4 5% to 100% V+ n Pulse Width Modulation (PWM) Controlled by Simple 0V to 1V Analog Input n Four Available Options Define Duty Cycle Limits – Minimum Duty Cycle at 0% or 5% – Maximum Duty Cycle at 95% or 100% n Frequency Range: 3.81Hz to 1MHz n Single Resistor Programs Frequency with < 2.4% Maximum Error n PWM Duty Cycle Error < 4.5% 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 –40°C to 125°C Operating Temperature Range n Available in Low Profile (1mm) SOT-23 (ThinSOT™) and 2mm × 3mm DFN L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and TimerBlox and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. FEATURES APPLICATIONS n LED Dimming Control n PWM Servo Loops n High Vibration, High Acceleration Environments n Portable and Battery-Powered Equipment 6992 TA01a LTC6992 MOD GND SET OUT V+ DIV RSET 50k V+ ANALOG PWM DUTY CYCLE CONTROL (0V TO 1V) C1 0.1μF 1MHz Pulse Width Modulator MOD 0.5V/DIV OUT 1V/DIV 2μs/DIV 6992 TA01b |
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