lt3465a Linear Technology Corporation, lt3465a Datasheet
lt3465a
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lt3465a Summary of contents
Page 1
... Constant frequency switching results in low input noise and a small output capacitor. Just 0.22µF is required for 3 5-LED applications. The LT3465 and LT3465A are available in the low profile (1mm) 6-lead SOT-23 (ThinSOT , LTC and LT are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation ...
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... Schottky Forward Drop I D Schottky Leakage Current V Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note 2: The LT3465E/LT3465AE are guaranteed to meet performance 2 U PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER LT3465ES6 LT3465AES6 Order Options Tape and Reel: Add #TR ...
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... SCHOTTKY FORWARD DROP (mV) Open-Circuit Output Clamp Voltage 25° INPUT VOLTAGE (V) Switching Waveforms (LT3465A 10V/DIV I L 50mA/DIV V OUT 50mV/DIV V = 3.6V 100ns/DIV IN 4 LEDs 20mA, 22µH LT3465/LT3465A Shutdown Quiescent Current (CTRL = 0V 25°C ...
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... TEMPERATURE (°C) 3465A G09 V = 3.6V, 4 LEDs IN 85 LT3465 LT3465A 80 75 15mA –50 0 TEMPERATURE (°C) 4 Quiescent Current (CTRL = 3V) 3.0 2.5 2.0 1.5 1.0 –50°C 0.5 25°C 100° ...
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... V mV CTRL ⎜ exp p ⎝ ⎜ ⎠ ⎟ ⎝ • LT3465/LT3465A is greater CTRL is less than 1V, LED current is reduced. ⎞ ⎞ ⎟ ⎟ ⎟ ⎟ + > 1 for V 150 mV ⎟ CTRL ⎟ ⎟ ⎟ ⎠ ...
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... BLOCK DIAGRA – 200mV V + REF 1.25V + 10k CTRL 40k 4 6 COMPARATOR – Σ RAMP GENERATOR 1.2MHz* OSCILLATOR *2.4MHz FOR LT3465A Figure 2. LT3465 Block Diagram 6 SW DRIVER OVERVOLTAGE PROTECT + 0.2Ω – 2 GND 3465A F02 V OUT 1 3465afa ...
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... If the error amplifier’s output increases, more current is delivered to the output decreases, less current is delivered. The CTRL pin voltage is used to adjust the reference voltage. The block diagram for the LT3465A (not shown) is identical except that the oscillator frequency is 2.4MHz. W ...
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... The small size of ceramic capacitors makes them ideal for Taiyo Yuden 408-573-4150 LT3465 and LT3465A applications. X5R and X7R types are www.t-yuden.com recommended because they retain their capacitance over wider voltage and temperature ranges than other types such as Y5V or Z5U. A 1µF input capacitor and a 0.22µF output capacitor are sufficient for most LT3465 and LT3465A applications ...
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... IN 4 LEDs, 20mA L = 22µ 0.22µF Figure 5. Start-Up Waveforms Inrush Current The LT3465 and LT3465A have a built-in Schottky diode. When supply voltage is applied to the V difference between V and V generates inrush current IN OUT flowing from input through the inductor and the Schottky ...
Page 10
... Average LED current increases proportionally with the duty cycle of the PWM signal. With the PWM signal at the CTRL pin to turn the LT3465A on and off, the output capacitor is charged and discharged accordingly. This capacitor charging/ discharging affects the waveform at the FB pin. For low ...
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... Equation 1. 10Hz 100Hz 1kHz 10kHz 30kHz 80 100 3465A F07c 200 180 160 140 120 100 2 LEDs 3 LEDs 4 LEDs 60 80 100 3465A F07e Figure 7f.V LT3465/LT3465A 200 C = 0.47µF OUT 180 4 LEDs 160 140 120 100 80 10Hz 60 100Hz 40 1kHz 10kHz 20 30kHz ...
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... LEDs are disconnected from the circuit or the LEDs fail, the V is clamped at 30V. The LT3465 and OUT LT3465A will then switch at a very low frequency to minimize the input current. V and input current during OUT output open circuit are shown in the Typical Performance Characteristics ...
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... R1 4Ω 3465A TA01a Li-Ion to Three White LEDs OUT 0.22µ 10Ω 3465A TA02a LT3465/LT3465A = 3.6V IN LT3465 LT3465A LED CURRENT (mA) 3465A TA01b LEDs LT3465 LT3465A LED CURRENT (mA) 3465A TA02b 3465afa 13 ...
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... LT3465/ 1µF LT3465A CTRL GND C : TAIYO YUDEN JMK107BJ105 TAIYO YUDEN GMK212BJ224 OUT L1: MURATA LQH32CN220 14 Li-Ion to Five White LEDs C OUT 0.22µ 10Ω 3465A TA03a 3. LEDs LT3465 LT3465A LED CURRENT (mA) 3465A TA03b 3465afa ...
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... MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 U S6 Package 6-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1636) 1.22 REF 1.50 – 1.75 2.80 BSC 1.4 MIN (NOTE 4) 0.95 BSC 0.80 – 0.90 1.00 MAX 0.09 – 0.20 (NOTE 3) LT3465/LT3465A 2.90 BSC (NOTE 4) PIN ONE ID 0.30 – 0.45 6 PLCS (NOTE 3) 0.01 – 0.10 1.90 BSC S6 TSOT-23 0302 15 3465afa ...
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... CTRL GND C : TAIYO YUDEN JMK107BJ105 TAIYO YUDEN GMK212BJ474 OUT L1: MURATA LQH32CN470 (LT3465) L1: MURATA LQH32CN220 (LT3465A) RELATED PARTS PART NUMBER DESCRIPTION LT1618 Constant Current, Constant Voltage, 1.4MHz, High Efficiency Boost Regulator LT1932 Constant Current, 1.2MHz, High Efficiency White LED Boost Regulator LT1937 Constant Current, 1 ...