QX5252_V01 QXMD | Alldatasheet
Document overview
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Technical content
Features
Operating Voltage: 0.9V~1.5V 3mA~300mA Output current Patented over-discharge protection : shutdown without flicker Integrated light control switch Integrated Schottky Diode Only an external inductor is requierd High Efficiency Low quiescent current: 17uA
Applications
Solar lawn Solar Landscape
2 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn
Ordering Information
3 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Pin Description Pin Name Package Type and Pin Number Pin Type Description SOT23-5 TO-94 LX 3 4 Output Drain of the switching power MOSFET S B AT 1 1 Input Connect to solar cells positive terminal VSS 4 3 Ground Ground B AT 5 2 Output Connect to rechargeable battery positive terminal LS 2 - Input Light sense Functional Block Diagram Light Sense Over- discharge protection SBAT VSS LX BAT Driver Figure 2：Functional Block Diagram of QX5252
4 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Absolute Maximum Ratings (Note 1) Parameter Symbol Description Min Max Unit Voltage VMAX Maximum Voltage On SBA T,BAT and LX Pins 7 V Current ILX_MAX Maximum Current On LX Pin 800 mA Power Dissipation PTO-94 Maximum Power Dissipation for PTO-94 Package 0.75 W PSOT23-5 Maximum Power Dissipation for PSOT23-5 Package 0.25 W Thermal TA Operating Temperature Range -20 85 oC TSTG Storage Temperature Range -40 120 oC TSD1 Soldering Temperature Rang for TO -94 Package （less than 5 sec） 250 260 oC TSD2 Soldering Temperature Rang for SOT23-5 Package （less than 30 sec） 230 240 oC ESD VESD ESD Voltage for Human Body Mode 2000 V Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Electronic Characteristics TA =25 oC, L1 =47uH, unless otherwise specified Parameter Symbol Test Conditions Min Typ Max Unit Supply Voltage Operating Voltage VB AT 0.9 1.5 V Supply Current Quiescent Current IBAT0 17 uA TON Time TON Time TON 5 us Efficiency Efficiency η L1 =180uH，C1=22uF 84 %
5 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Typical Electrical Curves VB AT=1.2V, TA =25 oC, unless otherwise specified
6 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Applications Information Detailed Description QX5252 is an ASIC for solar LED lawn lights. Only a peripheral inductor is required to realize the step -up power supply, and the maximum drive efficiency can exceed 84%. QX5252 ha s automatically charge characteristics. The operating voltage of QX5252 is 0.9V to 1.5V , suitable for a single AA battery or a single Ni-H battery. QX5252 uses CMOS technology , therefore the power consumption is very small. QX5252 us es patented techn ique to realize the LED lights shutdown without flicker when the battery voltage is low. The internal circuits of QX5252 include switching driver, light control switch ing circuit, over-discharge protection, and the internal integrated Schottky diode. Light Control Switch Setting light control. photo-resistor and a n ordinary resistor to achieve light control , LS terminal voltage is set by the following equation: LS BAT RVV RR= ∗ + When VLS higher than 0.3 * V B AT, the light control switch makes the LED light control switches off, when V LS lower th an 0.22 * VB AT, the light control switch makes the LED lights turn on. Power Setting The LED power is set to: 2.5 10BAT LED VP L η −⋅⋅= ×
7 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn
Package Information
Physical Dimensions for TO-94 Package:
8 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Physical Dimensions for SOT23-5 Package:
9 of 9 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn Declaration QXMD reserves the right to make changes to improve technical design and semiconductor products, and may do so without further notice. Buyers should obtain the latest relevant information before placing orders and should verify t hat such information is current and complete. QXMD is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyers, when utilizing QXMD products, to comply with the standards of safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of such QXMD products could cause loss of human life, bodily injury or damage to property. In developing your designs, please ensure that QXMD products are used within specified operating ranges as set forth in the most recent QXMD products specifications. The QXMD products listed in this document are intended for usage in consumer electronics applications. These QXMD products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or fail ure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instr uments, medical instruments, all types of safety devices, etc.. Unintended Usage of QXMD products listed in this document shall be made at the customer’s own risk. The information contained herein is presented only as a guide for the applications of our pr oducts. QXMD cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a QXMD product. No circuit patent licenses are implied. Customer Service Center QX Micro Devices Co., Ltd. Add: 4th Floor, Building 22, Zhiheng Hi-Tech Park, Nantou Guangkou 2nd Road, Nanshan, Shenzhen, Guangdong, China ZIP Code: 518052 Tel: +86-0755-88852177 Fax: +86-0755-86350858 Web Site: www.qxmd.com.cn