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QX5252 Dataheets PDF



Part Number QX5252
Manufacturers Qxmd
Logo Qxmd
Description Solar LED Driver
Datasheet QX5252 DatasheetQX5252 Datasheet (PDF)

General 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 has automatical charge characteristic. QX5252 uses CMOS technology , therefore the power consumption is very small. QX5252 uses patented technique to realize the LED lights shutdown without flicker when the battery voltage is low. The operating voltage of QX5252 is 0.9V to 1.5V, suitable for a single A.

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General 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 has automatical charge characteristic. QX5252 uses CMOS technology , therefore the power consumption is very small. QX5252 uses patented technique to realize the LED lights shutdown without flicker when the battery voltage is low. The operating voltage of QX5252 is 0.9V to 1.5V, suitable for a single AA battery or a single Ni-H battery. QX5252 Solar LED Driver 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 Typical Application SBAT BAT L1 VSS LX QX5252 QX5252 L1 BAT R1 LS R2 SBAT VSS LX (a)Uses solar panel to achieve light control (b) Uses photo-resistor to achieve light control Figure 1:Typical Application Circuit Diagrams of QX5252 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 1 of 9 Ordering Information Type Number QX5252 QX5252 Solar LED Driver Package Marking Pin Assignments 5252F XXXX Lot Number Date 5252F XXXX 1234 BAT VSS 54 SBAT BAT VSS LX TO-94 1 SBAT 2 LS 3 LX SOT23-5 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 2 of 9 Pin Description Pin Name Package Type and Pin Number SOT23-5 TO-94 LX 3 4 SBAT VSS BAT LS 1 4 5 2 1 3 2 - QX5252 Solar LED Driver Pin Type Description Output Input Ground Output Input Drain of the switching power MOSFET Connect to solar cells positive terminal Ground Connect to rechargeable battery positive terminal Light sense Functional Block Diagram SBAT Light Sense Overdischarge protection Driver BAT LX VSS QX5252_DS03EN Figure 2:Functional Block Diagram of QX5252 QX Micro Devices Co., Ltd. www.qxmd.com.cn 3 of 9 QX5252 Solar LED Driver Absolute Maximum Ratings (Note 1) Parameter Symbol Description Min Max Unit Voltage VMAX Maximum Voltage On SBAT,BAT and LX Pins 7V Current ILX_MAX Maximum Current On LX Pin 800 mA Power Dissipation PTO-94 PSOT23-5 Maximum Power Dissipation for PTO-94 Package Maximum Power Dissipation for PSOT23-5 Package TA Operating Temperature Range TSTG Storage Temperature Range Thermal TSD1 Soldering Temperature Rang for TO-94 Package (less than 5 sec) -20 -40 250 0.75 0.25 85 120 260 W W oC oC 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 VBAT Supply Current Quiescent Current IBAT0 TON Time TON Time TON Efficiency Efficiency η L1 =180uH,C1=22uF 0.9 1.5 V 17 uA 5 us 84 % QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 4 of 9 Typical Electrical Curves VBAT=1.2V, TA =25 oC, unless otherwise specified QX5252 Solar LED Driver QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 5 of 9 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 has 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 uses patented technique to realize the LED lights shutdown without flicker when the battery voltage is low. The internal circuits of QX5252 include switching driver, light control switching circuit, over-discharge protection, and the internal integrated Schottky diode. QX5252 Solar LED Driver Light Control Switch Setting TO-94 Package Uses solar panels to achieve light control. SOT23-5 Package Uses an external photo-resistor and an ordinary resistor to achieve light control, LS terminal voltage is set by the following equation: =VLS R2 ∗VBAT R1+ R2 When VLS higher than 0.3 * VBAT, the light control switch makes the LED light control switches off, when VLS lower than 0.22 * VBAT, the light control switch makes the LED lights turn on. Power Setting The LED power is set to: =PLED 2.5 ⋅η ⋅ V2 BAT ×10−6 L1 QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 6 of 9 Package Information Physical Dimensions for TO-94 Package: QX5252 Solar LED Driver QX5252_DS03EN QX Micro Devices Co., Ltd. www.qxmd.com.cn 7 of 9 Physical Dimen.


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