LT3003 LINER [Linear Technology], LT3003 Datasheet
LT3003
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LT3003 Summary of contents
Page 1
... PWM pin for all modes without the need for external level-shifting circuitry. For applications with input supply above and below the output voltage of the LED strings, the LT3003 allows the LEDs to be returned to the input supply (buck-boost mode) instead of being limited to only SEPIC solutions. ...
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... PACKAGE/ORDER INFORMATION EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB ORDER PART NUMBER LT3003EMSE Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF Lead Free Part Marking: Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. ...
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... Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LT3003E is guaranteed to meet performance specifi cations from 0°C to 85°C junction temperature. Specifi cations over the –40°C to 125°C operating junction temperature range are assured by design, characterization and correlation with statistical process controls ...
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... V the internal control circuitry. • Boost: Connect to Input Supply • Buck Mode: Connect to Input Supply • Buck-Boost Mode: Connect to V PWM (Pin 6): Input Pin for PWM Dimming Control. A PWM signal above 0.5V (on threshold) turns the LT3003 4 V LED IN 16 ...
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... Exposed Pad (Pin 11): GND. The ground for the IC should be soldered to a continuous copper ground plane under the LT3003 die. Soldering the Exposed Pad to the copper ground plane under the device will reduce thermal resis- tance and increase the power capability of the LT3003. ...
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... OT2 is sized to pull 300µA to defeat switching for most of LTC’s LED drivers by pulling down the g error amplifi er output. LT3003 is forced to a “zero m LED current state” special internal protection circuit when junction temperature reaches 150°C. ...
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... IN EE Buck Mode: PWM Dimming The LT3003 supports 3000:1 PWM dimming ratio in buck mode. The PWM dimming in buck mode is achieved by an architecture that allows the LT3003 power ground ( move with output capacitor voltage. PWM dim- ...
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... The active low OT2 output can sink 300µA of current and can be connected to the switching regulator’s g amplifi er output to defeat switching. The LT3003 has to cool down by 6°C (119°C) for OT1 and OT2 outputs to reset (collector outputs high). ...
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... Hence, for systems with high system input volt- EE age and low Buck Mode benefi cial to lower the level of V pin voltage (LT3003 upper rail) with an external zener to reduce power dissipation in the chip. Therefore recom- mended to limit (V best performance, (V LT3003 = 0V ...
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... REF CAP1 37 V LED1 ADJ1 LT3476 PWM1 6 R SW1 T R3 SW1 21k V GND NC 19-21, 39 30-32 10 1.05A Buck Mode LT3003 with the LT3476 PV IN 32V 4.7µF 35V 1µF C1 1µF 1 LED1 LED LED R1 0.1Ω LED2 2 LED LED 3 LED3 PWM LED LED 8 LEDs PER STRING ...
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... C4: MURATA GRM32ER71H475KA88L D1: DIODES INC. DFLS140 L1: SUMIDA CDRH5D16-4R7 PWM Dimming 1000 I = 110mA PER STRING LED NUMBER OF LEDS = 8 × 100 10 1 0.1 100 1 10 1000 PWM DIMMING RATIO 330mA Boost LT3003 with the LT3477 L1 D1 4.7µ 1.15M SP1 SN1 6 FBN ...
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... LT3003 TYPICAL APPLICATIONS 16V 33µF CER 33nF CER PWM 300mA Buck-Boost Mode LT3003 with the LT3477 D3 1µ MAX IN 1 LED1 V EE LED9 LED10 LED11 LED12 2 GND LT3003 LED2 LED5 LED6 LED7 LED8 3 LED3 SHDN ...
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... TYPICAL APPLICATIONS V IN 32V C1 4.7µF 50V CER 1µF 10V CER 1A Buck Mode LT3003 with the LT1618 R SENSE 0.05Ω 1%, 1A LED1 LED2 LED3 OT1 V MAX D1 14V V LT3003 OT2 SHDN PWM V GND C3 EE 1µF 50V L1 10µH ISN NC 1.5A ISP ...
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... V IN 24V LED1 V EE LED2 SHDN LED3 OT2 LT3003 V OT1 MAX V PWM IN GND 20V C3 1µF 50V 14 1A Buck LT3003 with the LT3475 D1 C OUT1 1N4448W 2.2µF 16V L1 D2 LED7 LED8 LED9 10µH B240A SUMIDA LED4 LED5 LED6 R8 LED1 LED2 LED3 2.0k ...
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... MAX DETAIL “A” SEATING PLANE 0.17 – 0.27 (.007 – .011) 0.50 TYP (.0197) BSC LT3003 2.06 ± 0.102 (.081 ± .004) 1.83 ± 0.102 (.072 ± .004) 0.497 ± 0.076 (.0196 ± .003 REF 3.00 ± 0.102 (.118 ± .004) (NOTE 4) 0 ...
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... LT3003 RELATED PARTS PART NUMBER DESCRIPTION LT1618 Constant-Current/Constant-Voltage DC/DC Converter LT1932 Constant Current,1.2MHz, High Effi ciency White LED Boost Regulator LT1942 Quad DC/DC Converter for Triple Output TFT Supply Plus Boost LED Driver, with a 2-Channel Ballaster LT3475 36V, 2MHz, Dual 1.5A Step-Down LED Driver LT3477 3A, 3 ...