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CS1680 Scheda tecnica(PDF) 1 Page - Cirrus Logic |
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CS1680 Scheda tecnica(HTML) 1 Page - Cirrus Logic |
1 / 16 page Copyright Cirrus Logic, Inc. 2014 (All Rights Reserved) Cirrus Logic, Inc. http://www.cirrus.com CS1680 Dimmable LED Driver IC for Low-voltage Lighting Features • Best-in-class Transformer Compatibility - Magnetic Transformers - Electronic Transformers • Best-in-class Dimmer Compatibility - Leading-edge (TRIAC) Dimmers - Trailing-edge Dimmers • High Efficiency - Up to 80% for CS1680-00 Applications - Up to 83% for CS1680-02 Applications • Flicker-free Dimming • 5% Minimum Dimming Level • Cascade Boost-buck Topology with Constant-current Output - CS1680-00 Output Voltage 15V - CS1680-02 Output Voltage 21V • Fast Startup • Tight LED Current Regulation: Better than ±10% • >0.9 Power Factor on Magnetic Transformers • Soft Start • Protections: - Output Open/Short - Boost Overvoltage - Overcurrent Detection - External Overtemperature Using NTC Overview The CS1680 is a cascade boost-buck dimmable LED driver for the 12V halogen lamp-replacement market. The CS1680 uses a Cirrus Logic proprietary intelligent digital control that provides exceptional single-lamp and multi-lamp transformer compatibility for non-dimmer sys- tems and dimmer systems paired with electronic and magnetic low-voltage transformers. The CS1680 integrates a continuous conduction mode (CCM) boost converter that provides transformer com- patibility and dimmer compatibility. An adaptive digital algorithm controls the boost stage and dimmer compati- bility operation mode to enable flicker-free operation down to 5% output current with leading-edge and trail- ing-edge dimmers. Applications • MR16 Lamps • All 12VAC/VDC Low-voltage Lighting Applications Ordering Information See page 15 . LED + LED - COUT NTC CBST DBST Q B UCK CS1680 VAC BUCKGD BSTOUT 9 CLAMP BUCKZCD BUCKSENSE eOTP 12 2 13 RCLAMP R S C NTC RBST D1 12VAC/VDC D2 Vrect VBST DBUCK QCLAMP C5 VDD GPIO BSTSENSE BSTGD C rect 6 7 3 11 15 RBUCK(Sense) RBST(Sense) QBST R4 Z2 D3 D4 GND 1 CTRL1 16 R CTRL1 R1 C4 RCTRL2 CTRL2 4 5 14 Q1 Z1 R5 C1 C3 R3 U1 D5 D6 Rrect C2 Q2 LBST L B UCK R2 OCT’14 DS1055F1 |
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