ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Description ACE715C is a step-up converter designed for driving up to 7 series white LED's from a single cell Lithium Ion battery. Its low 250mV feedback voltage reduces power loss and improves efficiency. Optimized operation frequency can meet the requirement of small LC filters value and low operation current with high efficiency. Internal soft start function can reduce the inrush current. Tiny package type provides the best solution for PCB space saving and total BOM cost. ACE715C is available in SOT23-6 package that is PB free. Features 2.5V to 5.5V Input Voltage Drivers up to 8 Series WLEDs Low 250mV Feedback Voltage 1.2MHz Fixed Switching Frequency Internal 1.6A Switch Current Limit Internal Compensation Thermal Shutdown Over Voltage Protection Dimming with wide Frequency Range Available in SOT23-6 Package Application Camera Flash White LED PDA LED back light Digital still cameras Typical Application VER 1.1 1 ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Absolute Maximum Ratings Parameter Max IN, EN Pin Voltage -0.3V to 6V SW Pin Voltage -0.3V to 30V All Other Pin Voltage -0.3V to 6V Junction Temperature (TJ) 150°C Ambient Temperature (TA) -40°C to 85°C Power Dissipation 600mW Thermal Resistance (θJA) 250°C /W SOT23-6 Thermal Resistance (θJC) 130°C /W Storage Temperature (Ts) -65°C to 150°C Lead Temperature & Time 260°C, 10Sec Packaging Type SOT-23-6 6 5 4 1 2 3 Pin No. Symbol Description 1 LX Power Switch Output. LX is the drain of the internal MOSFET switch. Connect the power inductor and output rectifier to LX. LX can swing between GND and 30V. 2 GND Ground. 3 FB Feedback Input. The FB voltage is 0.25V. Connect a resistor divider to FB. 4 EN Chip enable, but a PWM signal with various duty cycle can directly sent to EN pin to achieve the backlight dimming. 5 OVP Over Voltage Input. OV measures the output voltage for open circuit protection. Connect OV to the output at the top of the LED string. 6 IN Power Supply. Must be locally bypassed. VER 1.1 2 ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Ordering Information ACE715CXX + H Halogen - free Pb - free GM : SOT-23-6 Recommended Work Conditions Parameter Value Input Voltage Range 2.5V to 5.5V Output Voltage Range VIN to 30V Operating Junction Temperature(Tj) -40°C –125°C Electrical Characteristics (TA=25℃, VIN=3V, VCE=3V, unless otherwise noted) Parameter Symbol VIN Operating Input Voltage 2.5 VFB Feedback Voltage 237 250 IFB FB input Bias Current -50 -10 SW Leakage Conditions Min Typ VSW=20V Max Units 5.5 V 263 mV nA 1 uA VFB=0.2V, Switch 0.15 0.3 mA VEN=0V 0.1 1 uA IQ Quiescent Current FSW Oscillator Frequency 1.2 MHz DMAX Maximum Duty Cycle 90 % VEN EN Threshold 1 V VOVP OVP Threshold 28 V SW On-Resistance 400 ILIMIT Current Limit Thermal Shutdown VIN=4V, Duty Cycle = 50% 650 mΩ 1.6 A 160 °C VER 1.1 3 ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Typical Performance Characteristics VER 1.1 4 ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Packing Information SOT-23-6 VER 1.1 5 ACE715C High Efficiency 1.2MHz 30V Boost LED Driver Notes ACE does not assume any responsibility for use as critical components in life support devices or systems without the express written approval of the president and general counsel of ACE Electronics Co., LTD. As sued herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and shoes failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. ACE Technology Co., LTD. http://www.ace-ele.com/ VER 1.1 6