LED6000PHTR STMicroelectronics

LED6000 3 A, 61 V monolithic current source with dimming capability Datasheet - production data Applications HTSSOP16 (R = 40 C) TH HB LED driving applications Halogen bulb replacement Features Description Up to 3 A DC output current The LED6000 is a step-down monolithic switching 4.5 V to 61 V operating input voltage regulator designed to source up to 3 A DC current R = 250 m typ. for high power LED driving. The 250 mV typical DS,ON RSENSE voltage drop enhances the efficiency. Adjustable f (250 kHz - 1.5 MHz) SW Digital dimming is implemented by driving the Dimming function with dedicated pin dedicated DIM pin. Low I shutdown (10 A typ. from VIN) Q The adjustable current limitation, designed to Low I operating (2.4 mA typ.) select the inductor RMS in accordance with the Q nominal output LED current, and the adjustability 3% output current accuracy of the switching frequency allow the size of the Synchronization application to be compact. The embedded Enable with dedicated pin switchover feature on the VBIAS pin maximizes efficiency. Multiple devices can be synchronized Adjustable soft-start time by sharing the SYNCH pin to prevent beating Adjustable current limitation noise in low-noise applications, and to reduce the Low dropout operation (12 s max.) input current RMS value. VBIAS improves efficiency at light-load The device is fully protected against overheating, Output voltage sequencing overcurrent and output short-circuit. Auto recovery thermal shutdown The LED6000 is available in an HTSSOP16 exposed pad package. MLCC output capacitor Figure 1. Application schematic %* . 4: / ) %* . 7* / 7* / 7* / 500 -&% 7 - &/ * / 44 065 48 3 36 *-*. % 1 0. 7 44 % 1 34/ 4 (/ % (/ % May 2015 DocID027777 Rev 2 1/49 This is information on a product in full production. www.st.com. 7-&% (/ -9 7-&% -9 0054 7 *Contents LED6000 Contents 1 Block diagram 4 2 Pin settings 5 2.1 Pin connection 5 2.2 Pin description 6 2.3 Maximum ratings 7 2.4 Thermal data . 7 2.5 ESD protection 7 3 Electrical characteristics . 8 4 Functional description 11 4.1 Oscillator and synchronization 11 4.2 Soft-start 15 4.3 Digital dimming . 16 4.4 Error amplifier and light-load management . 19 4.5 Low VIN operation 20 4.6 Overcurrent protection . 21 4.7 Overtemperature protection . 23 5 Application notes - step-down conversion 24 5.1 Input capacitor selection 24 5.2 Output capacitor and inductor selection 25 5.3 Compensation strategy 27 5.4 Thermal considerations 30 5.5 Layout considerations . 31 5.6 Demonstration board 32 2/49 DocID027777 Rev 2