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