L5030-AF5-R

L5030 UTC | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 7

Technical content

UNISONIC TECHNOLOGIES CO., LTD L5030 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of Copyright © 2007 Unisonic Technologies Co., Ltd QW-R125-001.# BOOST-UP VOLTAGE CONVERTER FOR LED DRIVER „ DESCRIPTION The L5030 is a high efficiency boost converter operating in current loop, based on a PFM mode to drive LEDs. The current mode regulation allows the uniform brightness of LEDs. The wide application of L5030 makes it suitable for many types of battery applications such as Li-ions, Alkaline, or Sealed Lead Acid battery. The combination of few external components and small package size keeps the converter board area to a minimum in space-restricted applications. „ FEATURES * Inductor based converter brings up to 92% efficiency * +0.8V to +8.0V input voltage range * 0.92V guaranteed start up input voltage * Boost up control using PFM * Constant output current regulation *Pb-free plating product number: L5030L „ ORDERING INFORMATION Ordering Number Normal Lead Free Plating Package Packing L5030-AF5-R L5030L-AF5-R SOT-25 Tape Reel

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 7 www.unisonic.com.tw QW-R125-001.# „ MARKING Voltage Code 2 1 E0C0 „ PIN DESCRIPTIONS PIN NO. SYMBOL I/O DESCRIPTION

1 V CC Supply voltage

2 GND Ground

3 NC No connection

4 I SENSE I Current sense input

5 V DRIVE O Output drive for external switching tran sistor. Connected to the base of external switching transistor.

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 7 www.unisonic.com.tw QW-R125-001.# „ BLOCK DIAGRAM Driver ISENSE 19mV VREF Oscillator VDRIVE Q ON/OFF Time Control

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 7 www.unisonic.com.tw QW-R125-001.# „ DEVICE DESCRIPTION The UTC L5030 is designed to supply a co nstant current to the external l oad, the circuit be powered a battery supply. An external transistor is required for LED application. The UTC L5030 guarantees the start up voltage as low as 0.92V and remains operation down to 0.8V. The basic structure of UTC L5030 is a step-up DC/DC converter. It offers a Pulse Frequency Modulation (PFM) operation, which controls the constant OFF time (1.7µs typically) for external transistor at the 200KHz maximum frequency. The external switching transistor is ON and kept on un til the voltage across the curre nt-sense resistor which is connected in series with the emitter of the switching transistor exceeds the I SENSE input threshold (19mV). The transistor is shut OFF and the energy st ored in inductor is discharged when I SENSE input threshold exceeds 19mV. Once the discharge cycle is completed, the external trans istor is ON again. This charging and discharging sequence will repeat and trigger the external transistor regardless the inductor current value.

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 7 www.unisonic.com.tw QW-R125-001.# „ ABSOLUTE MAXIMUM RATINGS (Ta = 25Ċ) PARAMETER SYMBOL RATINGS UNIT Supply Voltage V CC -0.3 ~ 10 V Input Voltage -0.3 ~ V CC+0.3 V Power Dissipation P D 450 mW Operating Temperature T OPR -40 ~ +85 °C Storage Temperature T STG -55 ~ +125 °C Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. „ ELECTRICAL CHARACTERISTICS (VCC=1.5V) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNITS DC PARAMETERS (Ta=25°C, unless otherwise specified.) Recommended Supply Voltage V CC 0.8 8 V Minimum Startup Voltage V SU(MIN) I DRIVE=-600µA, VDRIVE=0.7V 0.8 0.92 V High V ISENSE = 0V, IVDRIVE =-0.5mA V CC-0.3 V CC V Drive Voltage Low VVDRIVE VISENSE = 50mV, IVDRIVE = 5mA 0 0.2 V ISENSE Threshold Voltage V ISENSE 14 19 24 mV Efficiency(Note 1) η 88 92 % Quiescent Current(Note 2) I Q 0.2 mA VDRIVE Output Current I VDRIVE V DRIVE = 0.7V, VISENSE = 0V 1.5 3.6 mA Supply Current(Note 3) I CC V DRIVE = 0.7V, VISENSE =0V 2 4 mA ISENSE Voltage Temp Co.(Note 2) T CVISENSE 0.4 %/°C ISENSE Input Current I ISENSE V ISENSE = 0V 0 -30 -65 µA AC PARAMETERS(Note 2) (Ta = 0 ~ 70°C, unless otherwise specified) Discharge Pulse Width T DRV 1.2 1.7 3.2 µs PFM Operating Frequency (Note 4) F OSC 200 kHz Note 1. The application dependent, please see reference designs. 2. These parameters ar e guaranteed by design. 3. See typical characteristics. The total supply current =IQ + IVDRIVE, 4. See applications section. Operating frequency is application circuit dependent.

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 7 www.unisonic.com.tw QW-R125-001.# „ TYPICAL APPLICATION CIRCUITS The UTC L5030 provides portable and multiple LEDs applications. Solution for portable application Efficiency (%) Solution for multiple LEDs application Efficiency (%)

L5030 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 7 of 7 www.unisonic.com.tw QW-R125-001.# „ TYPICAL CHARACTERISTICS 100Ȱ 851 300Ȱ Quiescent Current vs. Input Voltage Quiescent Current (A) 200Ȱ Input Voltage (V) 851 Drive Current vs. Input Voltage DriveCurrent (A) Input Voltage (V) Sense Voltage (V) Efficiency (%) UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior writ ten consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.