TENTATIVE TCA62753FUG TOSHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC TCA62753FUG Charge Pump type DC/DC Converter for White LED Driver TOSHIBA MICROELECTRONICS CORP. APPLICATION ENGINEERING GROUP 3 Ver 0.1 0.2 0.3 0.4 Data 2005-08-01 2005-08-10 2005-10-17 2005-11-10 Note New TSD Pin Assignment Electrical Characteristics 0 Charge Miura Miura Miura Miura chek (Ver04)2005-11-10 TENTATIVE TCA62753FUG TOSHIBA CMOS INTEGRATED CIRCIUTS SILICON MONOLITHIC TCA62753FUG Charge Pump type DC/DC Converter for White LED Driver The TCA62753FUG is a charge pump type DC/DC Converter specially designed for constant current driving of White LED. This IC can outputs LED current 100mA or more to 3.0-5.5V input. This IC is especially for driving back light white LEDs in LCD of PDA, Cellular Phone, or Handy Terminal Equipment. This IC is Pb-free product. Weight: 0.016 g (Typ.) Features ・Input Voltage : VIN=2.7V to 5.5V ・Output Current (VOUT=5V) : 100mA (VIN=3.0V or more) 50mA (VIN=2.7V to 3.0V) ・Switching Frequency : 1MHz(Typ.) ・Integrated protection circuit : Thermal Shut Down function Output short circuit detection function Output over voltage detection function ・Package : SSOP6-P-0.95B 1 (Ver04)2005-11-10 TENTATIVE TCA62753FUG Pin Assignment (top view) 6 SHDN C- 1 Z VIN 2 5 GND 4 VOUT C+ 3 Explanation of the Terminal No. Symbol Function 1 C- Capacitance connection terminal for charge pump. 2 VIN Power supply terminal. 3 C+ Capacitance connection terminal for charge pump. 4 VOUT Output terminal. 5 GND GND terminal. 6 SHDN Logic input terminal. (input a chip enable signal) SHDN = ”H” → Operation mode, SHDN = ”L” → Shutdown mode Block Diagram VIN 2 Step up Control Circuit SHDN 6 Control Circuit 3 C+ 1 C- VREF 4 VOUT 5 GND 2 (Ver04)2005-11-10 TENTATIVE TCA62753FUG Absolute Maximum Ratings (Ta=25°C) Characteristics Power Symbol Ratings Unit VIN −0.3 to +6.0 V V o l t a g e VSHDN −0.3~+VIN +0.3 *Note1 V V o l t a g e VOUT −0.3~+6.0 V supply I n p u t O u t p u t P o w e r voltage D i s s i p a t i o n PD 0.41(Device) W 0.47(with PCB) *Note2 300(Device) Thermal resistance Operating temperature range Storage temperature Maximum junction temperature Rth (j-a) °C/W 260(with PCB) Topr −40~+85 °C Tstg −55~+150 °C Tj 150 °C Note2: However, do not exceed 6V. Note3: When every time the ambient temperature gets over 25°C with 1°C, the allowable loss must reduce 3.8mW/°C more than maximum rated value. (When on PCB.) Recommended Operating Condition (unless otherwise specified, Ta = −40~85°C) Characteristics Power supply voltage Capacitance for Charge Pump Capacitance Capacitance for for input output Symbol Test Circuit Test Conditions Min. Typ. Max. Unit VIN - - 2.7 - 5.5 V C - - - 1.0 - mA CIN - - 1.0 2.2 10 µF COUT - - 1.0 2.2 10 µF Electrical Characteristics (unless otherwise specified, VIN = 3.6V, Ta = 25°C) Characteristics Power supply O u t p u t voltage V o l t a g e Symbol Test Conditions Min. Typ. Max. Unit VIN - 2.7 - 5.5 V 4.8 5.0 5.2 V 8 mA VOUT O p e r a ti ng c on s um p ti o n c ur r e n t IIN Quiescent consumption current IIN VIN=2.7~3.0V, IOUT=50mA VIN=3.0~5.0V, IOUT=100mA IOUT=0mA, VSHDN=VIN VIN=2.7~3.6V, IOUT=0mA, VSHDN=0V - 0.01 1 VIN=3.6~5.0V, IOUT=0mA, VSHDN=0V - - 2.5 µA SHDN terminal H level input voltage VSHDNH - 1.3 - VIN V SHDN terminal L level input voltage VSHDNL - 0 - 0.3 V ISHDNH VSHDN=VIN -1 - 1 ISHDNL VSHDN=0V -1 fOSC VSHDN=3.6V - 1 - MHz ISC VOUT=GND, VSHDN=3.6V - 250 - mA SHDN terminal C l o c k Short current F r e q u e n c y Circuit Current 3 1 µA (Ver04)2005-11-10 TENTATIVE TCA62753FUG The example of Application Circuit C=1.0µF 1 C- SHDN 6 ON/OFF VIN CIN=1.0µF 2 VIN 3 C+ GND 5 VOUT VOUT 4 COUT=1.0µF *Output This product outputs 5V(±0.2V) from the terminal VOUT in input voltage VIN=2.7V or more. In VIN=2.7V~3.0V, it becomes 50mA or more. In VIN=3.0V or more, it becomes 100mA or more. *Thermal shutdown function The thermal shutdown circuit works when the junction temperature exceeds 150℃(standard), and IC stops operating. (This function is not included in the product inspection.) *Output short circuit detection function When the output do short-circuit, IOUT is limited to 250mA(standard). *Output over voltage detection function The output is clamped so that VOUT should not become 6V or more even when the LED load is opened. 4 (Ver04)2005-11-10 TENTATIVE TCA62753FUG 5 (Ver04)2005-11-10 Package Dimensions Weight: 0.016 g (Typ.) TENTATIVE TCA62753FUG Notes on Contents Block Diagrams Some functional blocks, circuits, or constants may be omitted or simplified in the block diagram for explanatory purposes. Equivalent Circuitry Some parts of the equivalent circuitry may have been omitted or simplified for explanatory purposes. Maximum Ratings The absolute maximum ratings of a semiconductor device are a set of specified parameter values that must not be exceeded during operation, even for an instant. If any of these ratings are exceeded during operation, the electrical characteristics of the device may be irreparably altered and the reliability and lifetime of the device can no longer be guaranteed. Moreover, any exceeding of the ratings during operation may cause breakdown, damage and/or degradation in other equipment. Applications using the device should be designed so that no maximum rating will ever be exceeded under any operating conditions. Before using, creating and/or producing designs, refer to and comply with the precautions and conditions set forth in this document. Application Examples The application examples provided in this data sheet are provided for reference only. Thorough evaluation and testing should be implemented when designing your application's mass production design. In providing these application examples, Toshiba does not grant the use of any industrial property rights. Handling of the IC Ensure that the product is installed correctly to prevent breakdown, damage and/or degradation in the product or equipment. Short circuiting between output and line to ground faults may result in damage to the IC. Please exercise precaution in designing the output line, power line and GND line so as to prevent such damage. Be careful to insert the IC correctly. Inserting the IC the wrong way (e.g., wrong direction) may result in damage to the IC. Please exercise precaution in handling external components as shorting and opening such components may cause an overcurrent, which in turn may result in power overcurrent and/or in damage to the IC. Overcurrent and Thermal Protection Toshiba does not guarantee that these protection functions will prevent damage to the product. These functions are only intended as a temporary means of preventing output short circuiting and other abnormal conditions. If the guaranteed operating ranges of this product are exceeded, these protection functions may not function as intended and this product might be damaged due to output short circuiting. The overcurrent protection function is intended to protect this product from temporary short circuiting only. Short circuiting that last for a long time may cause excessive stress and damage to this product. 6 (Ver04)2005-11-10 TENTATIVE TCA62753FUG 7 (Ver04)2005-11-10