EUP2530OIR1

EUP2530 bkf 10 White LED Boost Converter with PWM Dimming and Single-Wire Series Interface DESCRIPTION FEATURES The EUP2530 is a constant current step-up converter specifically designed to drive white LEDs. With a 45V rated integrated switch FET, the step-up converter supports up to 10 white LEDs in series connection, so the LED currents are identical for uniform brightness. The boost converter runs at 1.0MHz fixed switching frequency with 1.3A switch current limit, and allows for the use of a high brightness LED in general lighting. The maximum white LED current is set with the external sensor resistor RFB, and the feedback voltage is regulated to 200mV, as shown in the typical application. During the operation, the LED current can be controlled through the EN pin in two modes. With a 8KHz or higher frequency PWM dimming signal on EN pin, EUP2530 operates in PWM dimming mode, which the duty cycle determines the feedback reference voltage. EUP2530 can operate in digital dimming mode also, which a Single Wire interface on the EN pin is integrated to adjust the FB voltage in 32 steps. In either digital or PWM mode, the EUP2530 does not generate audible noises on the output capacitor. For the protection, the EUP2530 provides 41.5V OVP to prevent damage from LED open. The EUP2530 is available in low profile TSOT23-6 and SOT23-6 packages.












APPLICATIONS




Typical Application Circuit Figure 1. DS2530 Ver1.3 June 2013 2.6V to 5.5V Input Range 41.5V Output Over Voltage Protection Internal Soft-Start Internal Compensation Single-Wire Serial Pulse Interface to Set LED Current with 32-Step Scale External PWM Dimming with 8KHz - 300KHz Frequency Range Internal 45V N-FET 1MHz Fixed Switching Frequency Over Voltage Protection Over Thermal Protection VIN Under Voltage LockOut Available in TSOT23-6 and SOT23-6 Packages RoHS Compliant and 100% Lead (Pb)-Free Halogen-Free Mobile Phones GPS Navigation Systems Portable Media Players Handheld Devices, Digital Camera Portable Game Machines White LED Application 1 EUP2530 Pin Configurations Package Type Pin Package Type Configurations TSOT23-6 Pin Configurations SOT23-6 Pin Description PIN TSOT23-6 SOT23-6 SW 1 1 GND 2 2 FB 3 3 EN 4 4 OUT 5 5 DESCRIPTION Switch Pin. This is the drain of the internal power switch. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI. Common Ground. Connect the pin to the ground plane. Feedback Pin. Reference voltage is 0.2V. Connect cathode of lowest LED and resistor here. Calculate resistor value according to the formula: RFB=0.2/ILED Enable pin of the boost regulator. It is a multi-functional pin which can be used for enable control, digital and PWM dimming control. Output voltage and over voltage protection. IN 6 6 Input Supply Voltage. DS2530 Ver1.3 June 2013 2 EUP2530 Ordering Information Order Number Package Type EUP2530OIR1 TSOT23-6 EUP2530VIR1 SOT23-6 EUP2530 Marking XXXXX A200 XXXXX A200 □ □ □ □ Lead Free Code 1: Lead Free, Halogen Free Packing R: Tape & Reel Operating temperature range I: Industry Standard Package Type O: TSOT V: SOT Block Diagram Figure 2. DS2530 Ver1.3 June 2013 3 Operating Temperature Range -40 °C to +85°C -40 °C to +85°C EUP2530 Absolute Maximum Ratings (1)        IN, EN, FB to GND -----------------------------------------------------------------OUT,SW to GND -------------------------------------------------------------------Power Dissipation, PD@ TA=25°C TSOT23-6 ----------------------------------------------------------------------------SOT23-6 ------------------------------------------------------------------------------Package Thermal Resistance TSOT23-6,θJA -----------------------------------------------------------------------SOT23-6,θJA -------------------------------------------------------------------------Maximum Junction Temperature --------------------------------------------------Lead Temperature (Soldering, 10sec.) --------------------------------------------Storage Temperature Range --------------------------------------------------------- -0.3V to 6V -0.3V to 45V 0.5W 0.488W 200°C/W 205°C/W 125°C 260°C -65°C to +150°C Recommend Operating Conditions (2)   Operating Temperature Range ---------------------------------------------------Supply Voltage , VIN----------------------------------------------------------------- -40°C to +85°C 2.6V to 5.5V Note (1): Stress beyond those listed under “Absolute Maximum Ratings” may damage the device. Note (2): The device is not guaranteed to function outside the recommended operating conditions. Electrical Characteristics (VIN =3.6V, VOUT=34V, COUT=1µF, CIN=4.7µF, L1=10µH, RFB=8Ω,TA= -40°C to+85°C. Unless otherwise noted. Typical values are at TA= +25°C) EUP2530 Symbol Parameter Conditions Min. Typ. Max. UVLO Under Voltage Lock Out Rising 2.0 2.2 2.4 Maximum Output Voltage No Switching 41 ICC1 Supply Current VCC=3.6V, Continuous Switching 0.75 1.5 ICC2 Quiescent Current VCC=3.6V, FB=1.3V, No Switching 300 700 ICC3 Shutdown Current VCC=3.6V, VEN