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LTC3454 Datasheet(PDF) 6 Page - Linear Technology |
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LTC3454 Datasheet(HTML) 6 Page - Linear Technology |
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6 / 12 page  LTC3454 6 3454fa BLOCK DIAGRAM LED EN2 2 EN1 ISET2 ISET1 RISET2 RISET1 1 800mV IISET1 LED CURRENT SETTING AMP 1 SAFETY ERROR AMP FORWARD CURRENT LIMIT REVERSE CURRENT LIMIT AUTOZEROING ERROR AMP CD PWM COMPARATOR AB PWM COMPARATOR – + – + – + 1.23V 1.23V + – + – 9 LOGIC 3.4A 275mA UNDERVOLTAGE LOCKOUT UV VIN 2.7V TO 5.5V OVERTEMP PROTECTION OT UV OT BANDGAP REFERENCE 1.23V 1MHz OSCILLATOR SWITCH A VIN OPTIONAL SW1 SW2 SWITCH D SWITCH B SWITCH C VOUT 10 6 11 VOUT 7 VC 8 3 3454 BD 377k 123k I R EXPOSED PAD (GND) R 3850 I 800mV LED CURRENT SETTING AMP 2 – + IISET2 SHUTDOWN 4 OPTIONAL ∑ 5 SOFT- START CLAMP CURRENT MIRROR GATE DRIVERS AND ANTICROSS- CONDUCTION |
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