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LM3509 데이터시트(PDF) 11 Page - Texas Instruments

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부품명 LM3509
상세설명  High Efficiency Boost for White LEDs
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제조업체  TI1 [Texas Instruments]
홈페이지  http://www.ti.com
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LM3509
www.ti.com
SNVS495D – FEBRUARY 2007 – REVISED MAY 2013
Typical Performance Characteristics (continued)
VIN = 3.6V, LEDs are OSRAM (LW M67C), COUT = 1µF (LED Mode), COUT = 2.2µF (OLED Mode), CIN = 1µF, L = TDK
VLF4012AT-100MR79, (RL = 0.3Ω), RSET = 8.06kΩ, UNI = '1', ILED = ISUB + IMAIN, TA = +25°C unless otherwise specified.
Start-Up Waveform (LED Mode)
Start-Up Waveform (OLED Mode)
(2 × 5 LEDs, 30mA per string)
(VOUT = 18V, IOUT = 60mA)
Channel 1: SDA (5V/div)
Channel 1: SDA (5V/div)
Channel 2: VOUT (10V/div)
Channel 2: VOUT (10V/div)
Channel 3: ILED (50mA/div)
Channel 3: IOUT (50mA/div)
Channel 4: IIN (500mA/div)
Channel 4: IIN (500mA/div)
Time Base: 400µs/div
Time Base: 400µs/div
Figure 27.
Figure 28.
Load Step (OLED Mode)
Line Step (LED Mode)
(VOUT = 18V, COUT = 2.2µF)
(2 × 5 LEDs, 30mA per String, COUT = 1µF)
Channel 1: VOUT (AC Coupled, 500mV/div)
Channel 1: VOUT (AC Coupled, 500mV/div)
Channel 2: IOUT (20mA/div)
Channel 2: VIN (AC Coupled, 500mV/div)
Time Base: 200µs/div
Time Base: 200µs/div
Figure 29.
Figure 30.
Transition From OLED to OLED + 1 × 4 LED)
(VOUT = 18V, IOUT = 40mA, ILED = 20mA, COUT = 2.2µF)
RESET Functionality
Channel 2: ISUB (20mA/div)
Channel 3: SDA (2V/div)
Channel R1: IMAIN (20mA/div)
Channel 1: VOUT (AC Coupled, 200mV/div)
Channel 1: RESET (2V/div)
Channel 2: IMAIN (20mA/div)
Time Base: 200ns/div
Time Base: 400µs/div
Figure 31.
Figure 32.
Copyright © 2007–2013, Texas Instruments Incorporated
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