TOSHIBA TB62733FTG TOSHIBA Bi-CMOS INTEGRATED CIRCUIT SILICON MONOLITHIC TB62733FTG Charge Pump type DC/DC Converter for White LED Driver ■Application Charge Pump type DC/DC Converter / White LED Driver ■Features TB62733FTG is charge pump type DC to DC Converter that is accept from 2.8 up to 4.2V input and continue to up converting operation until FB terminal is equal to 0.4V. (1.5 times up converting) This device provides over 190mA at Vin=3.9V as the maximum current, and two outputs structure may help to design the backlighting system such as the system having two displays that are main and sub LCD displays. Also, this is used for the power supply of flash lighting by using two outputs At the same time. ■Function 1.5 times Charge Pump type step up DC to DC converter ■Features ・Utilize Bi-CMOS Process ・Package : VQON24(Leadless type) ・Input Voltage : 2.8V (Min) ・Output Voltage : 4.0V (Min) ・Output Current Ability : Greater than 190mA (Usual State) ・4 Steps Brightness Control (25%, 50%, 75%, 100%) ・Auto Discharge function equipped ・Integrated protection circuit TSD (Thermal Shut Down ) （ＶQON24-0404-0.65） Weight： 0.0g (Typ.) Application Diagram C1 1.0μF C2 1.0μF C1＋ Vout0 C3 C1－ 2.0μF C2＋ C2－ Vout1 2.8～5.5V C4 Vin 1.0μF Brightness Control (４ Steps) GND FB1 SP1 Vout2 SP1 CE1 ON/OFF Control Company Headquarters 3 Northway Lane North Latham, New York 12110 Toll Free: 800.984.5337 Fax: 518.785.4725 FB2 CE2 Web: www.marktechopto.com | Email: [email protected] California Sales Office: 950 South Coast Drive, Suite 265 Costa Mesa, California 92626 Toll Free: 800.984.5337 Fax: 714.850.9314 TOSHIBA TB62733FTG ■ Block Diagram C2+ C2－ C1+ C1－ Vout0 Vin Vout1 Vout2 ON/OFF SP1 Control FB1 Feed Back Circuit Logic SP2 FB1：Prioritize FB2：In case "Vout１" Not In use GND CE1 CE2 FB2 P-GND ■ Explanation of Terminals Terminal Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Terminal Name NC Vout 1 C1+ C1VIN NC NC FB1 NC FB2 NC NC NC GND C2C2Vout2 NC SP2 SP1 Vout0 NC CE1 CE2 Function Output 1 Terminal Capacitance Terminal for Charge Pump Capacitance Terminal for Charge Pump Power supply terminal Comments Capacitance for Charge Pump Capacitance for Charge Pump Feed Back Control Terminal Setting feed back voltage by SP terminal (SP1,SP2) Feed Back Control Terminal Setting feed back voltage by SP terminal (SP1,SP2) Ground Capacitance Terminal for Charge Pump Capacitance Terminal for Charge Pump Output 2 Terminal Logic Input Logic Input Output 0 Logic Input Logic Input Capacitance for Charge Pump Capacitance for Charge Pump Setting of feed back voltage Setting of feed back voltage Terminal for output Capacitor On/ Off Control Terminal for Vout 1 On/ Off Control Terminal for Vout 2 ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 2) TOSHIBA TB62733FTG ■Absolute Maximum Ratings Item Power Supply Input Voltage Output Current Symbol Conditions Ratings Unit Vin Vin2 Iout － －0.3～6.0 FB/CE/SP Terminal －0.3～Vin+0.3 － 250 Without PCB 357 Power Dissipation ＰＤ With PCB TBD Operating Temperature TOPR － －25～85 Storage Temperature TSTG － －55～150 Junction Temperature Tj － 150 ※When the ambient temperature is excess 25 degree C, it should be derating with 1.24mW/degree C. ■Recommended Operating Conditions（Topr = -25 – 85 Degree C） Item Symbol Conditions Power Supply Vin － Logic Input Voltage VCE Input Ripple Voltage Vin(ripple) － Capacitance for Charge Pump C1/2 Min. 2.8 0 － 0.8 Typ. － － 1.0 V V mA ｍＷ ℃ ℃ ℃ Max. 5.5 Vin 40 4.0 Unit V V mVpp μF ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 3) TOSHIBA TB62733FTG （Vin＝3.6V, TOPR＝25℃, if it is not specified.） ■Electrical Characteristics Item Symbol Input Voltage Vin Maximum Output Voltage Feed Back Terminal Voltage （Tolerance of Current Setting） Feed Back Terminal Input Current Vout VFB1 VFB2 Output Current Ability Iout(MAX) Consumption Current IDD Stand By Consumption Current IDDSTB High Low Measurement Condition Logic Input Current VIH VIL Ileak Auto Discharging Iauto Vout Rise Time Clock Frequency fOSC Rush Current IRUSH Min. Typ. 2.8 Vin=3.0V， Iout=100mA SP1="L" , SP2="L" Iout=0mA SP1="L" , SP2="H" Iout=0mA SP1="H" , SP2="L" Iout=0mA SP1="H" , SP2="H" Iout=0mA IFB Iout1／2 Logic Input Voltage Measur ement Circuit Vin=3.2V，Vout=4.2V VFB1＝0.4V Vin=3.2V，Vout=4.2V VFB1＝0.4V CE1="H"，CE2="H"， Vin=2.8～4.2V Iout=100mA Iout=0mA CE1/2="L" Logic Inputs Logic Inputs Logic Inputs CE1/CE2="L⇔Ｈ" Vin=3.6V Vout=4.0V Vin=2.8V、Iout=10mA The transition time when Vout from 0V to 4V Rush Current at CE＝ "H" Max. Unit 5.5 V 4.0 － － V (94) 100 (106) mV (188) 200 (212) mV (282) 300 (318) mV (376) 400 (424) mV － － 0.5 μA 90 110 － mA 180 － － mA － － 5 mA － － 1 μA 0.7×Vin － － － － － － 0.3×Vin 0.5 V V μA － 7 － mA － － 500 μs 0.85 1.2 1.55 MHz － － 500 mA ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 4) TOSHIBA TB62733FTG ■Explanation of Operations 1.5 times Up converting operation This device performs up converting to output voltage (Vout) that is converted 1.5 times from input voltage. (Vin) The input voltage will be allowed from 2.8V to 4.2V. The actual output (Vout) will be differ by the conditions of output current, external parts, application circuit and so on, because the feed back voltage will be hold at the constant voltage. The ripple voltage of the output will be approximately 100mV peak to peak. 【Principle of Basic Operation】 The following is the explanation for basic operation of 1.5 time up converting Vin C1 1. Charging to C1 and C2 By connecting C1 and C2 through internal Switch as shown in the figure C1 and C2 is charged. In this case, the C1 is charged up to around the half of Vin.(Vc1=1/2Vin) Actually, the voltage is slightly lower than 1/2 Vin due to on resistance Of internal switch and equivalent resistance of C1. Thus, C2 is also charged up to 1/2 Vin as well. 2. Out put from C1 and C2 yjat are charged Vout C2 Vin Vout C1 By connecting C1 and C2 through internal switch as shown in the figure The charged energy of C1 and C2 output to Vout. At this time, Vout is added by the voltage charged to C1 and C2, therefore Vout voltage is approximately 3/2 Vin. C2 3. By repeating the operation 1 and 2 described above, the voltage is supplied to Vout around 1.5 times of Vin. ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 5) TOSHIBA TB62733FTG ■ Feed Back Voltage Control This device has a capability of variable control for feed back voltage by using two input such as SP1 and SP2. Two kind of feed back terminal exist and the following feed back control is performed. 1. Operating both Vout1 and Vout2 : Out1 is controlled by feed back terminal 1. (FB1) No feed back operation for Out2 2. Operate Vout1 only : Operation by feed back terminal 1 (FB1) 3. Operate Vout2 only : Operation by feed back terminal 2 (FB2) 1. Operate both Vout1 and Vout2 Vout1 Feed back Control 1 C3 LED ON 2.0μF FB1 RX Feed back Control 2 Vout2 C3 LED ON 2.0μF FB2 RX z In case of output capacitance C3 is connected to Vout0, capacitance C3 connecting to Vout1 and Vout2 May be omitted. However, if you have to care about output ripple, it is better C3 connect to each Vout1and Vout2. ２．Vout 1 operating Vout1 Feed Back Control 1 C3 2.0μF LED ON FB1 RX Vout2 C3 2.0μF LED OFF FB2 RX ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 6) TOSHIBA TB62733FTG 3. Vout 2 Operating Vout1 C3 2.0μF LED OFF FB1 RX Feed Back Control 2 Vout2 C3 2.0μF LED ON FB2 RX Truth Table (CE1 and CE2) CE1 CE2 Output Terminal L L None H L H L H H Vout1 Vout2 Vout1,Vout2 Feed Back Control None FB1 FB2 FB1／FB2 The feed back voltage is set by input signal (SP1 and SP2) As shown in the following table, the current value of LED is obtained by the following equation. ILED＝VFB／RX The brightness control is available with feed back voltage control. Truth Table for Current Control SP1 SP2 FB Control Voltage L L 0.1V L H 0.2V H L 0.3V H H 0.4V LED Current at Resistor(RX)＝20Ω 5mA 10mA 15mA 20mA ■Soft Start Function This device is integrated Soft start function. When the power supply is ON or output is started to operate, the transition time is controlled in order to decrease the rush current. ■Thermal Shut Down Function This device has Thermal Shutdown Function to protect from thermal damage when the output is shorted. The temperature to operate this function is set around from 120 to 160 degree C. (This is not guaranteed Value.) ■The selection of Capacitor for Charge Pump, input and output The input capacitor is effective to decrease the impedance of power supply and also input current is averaged. The input capacitor should be selected by impedance of power supply, it is better to choose with lower ESR (Equivalent Series Resistor). (i.e. ceramic capacitor etc.) Regarding to the capacitance values, it is recommended to choose in the range from 0.8 uF to 10 uF, however larger than 1 uF should be better. The output capacitor is effective to decrease the ripple noise of the output line. Also, it is better to choose the capacitor.) Regarding to the capacitance values, it is recommended to choose in the range from 0.8 uF to 10 uF, however larger than 2 uF should be better. The capacitor for charge pump operation is also selected the capacitor with low ESR. .) Regarding to the capacitance values, it is recommended to choose in the range from 0.8 uF to 10 uF, however larger than 1 uF should be better. ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 7) TOSHIBA TB62733FTG ■Application Example This device has a large drive capability (Iout Max : Larger than 190mA), if in case of driving LED at 20mA each, this device can drive up to 9 LEDs max. 1. In use of LCD backlighting (Main and Sub Displays) In case of driving the back light system both for main display and sub display, this device can be used for this application With securing the output current of maximum 190mA. Also, Vout 1 has a drive capability up to 110mA, so it is allowed to change the system thet Vout 1 can drive 6 LEDs (backlight for main display), then Vout 2 drives 2LEDs for the backlight of sub display as showing in Application Figure 2. The LED brightness balance is adjusted by using FB1 and FB2. Application Figure 1 C1 1.0μF C2 1.0μF C1＋ C1－ Main Display 1LED : 20 ｍＡ （Total 80 mA） C2＋ FB1 0.4V C2－ 2.8～4.2V C4 Vout1 Vin Vout0 20Ω 20Ω 20Ω C3 1.0μF 2.0μF GND SP1 20Ω Vout2 SP2 Sub Display 1LED：２０ｍＡ （Total 80 mA） CE1 CE2 FB2 0.4V 20Ω 20Ω 20Ω 20Ω Application Figure 2 C1 1.0μF C2 1.0μF C1＋ C1－ Main Display 1 LED：18ｍＡ （Total 108 mA） C2＋ FB1 C2－ 2.8～4.2V C4 Vout1 Vin 0.4V 20Ω Vout0 20Ω 20Ω 20Ω 20Ω 20Ω C3 1.0μF 2.0μF GND SP1 Vout2 Sub Display 1 LED ：20 mA （Total 40 mA） SP2 CE1 CE2 FB2 0.4V 20Ω 20Ω These figures are showing as the standard application example. The current values or so are considered whenever it is designed. ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 8) TOSHIBA TB62733FTG 2. In case of driving both Backlighting (Main/Sub Displays) and Key pad Illumination By using external MOS FET, the system of driving for main , sub display and Key pad Illumination is also composed. Application Figure 3 C1＋ C1 1.0μF Vout1 C1－ C2＋ C2 FB1 1.0μF C2－ 2.8～4.2V 20Ω Vout0 Vin C4 20Ω 20Ω 20Ω 2.0μF GND 50Ω Key Pad 1 LED：5 mA （Total 10 mA） Vout2 Sub Display 1 LED : 20 mA （Total 60 mA） SP2 CE1 CE2 20Ω C3 1.0μF SP1 Main Display 1 LED：20 mA （Total 80 mA） 0.4V FB2 0.4V 20Ω 20Ω 20Ω These figures are showing as the standard application example. The current values or so are considered whenever it is designed. 3. LCD Backlight system (Only Main Display) In case sub display is not connected, Vout 2 is terminated when CE2 terminal fix to the ground, then only Vout 1 can be operated. In case of this application, Vout2 and FB2 should be open connection. In case of using this device with 190mA of total output current, as shown application figure 5, Vout 1 and Vout 2 are connected as common output. In this case, CE1 and CE2 are applied with common signal, and FB2 should be open connection. Application Figure 4 C1 1.0μF C2 1.0μF C1＋ Vout1 C1－ FB1 C2－ 2.8～4.2V 0.4V 20Ω Vout0 C4 Main Display １灯：20 ｍＡ （TOTAL 80ｍＡ） C2＋ Vin 20Ω 20Ω C3 1.0μF 2.0μF GND SP1 20Ω Vout2 NC SP2 CE1 CE2 FB2 NC These figures are showing as the standard application example. The current values or so are considered whenever it is designed. ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 9) TOSHIBA TB62733FTG Application Figure 5 C1＋ C1 1.0μF Vout1 90mA C3 2.0μF C1－ C2＋ C2 FB1 1.0μF C2－ 2.8～4.2V 0.4V Vout0 C３ 2.0μF Vin C4 20Ω 20Ω 20Ω 20Ω 20Ω 20Ω 20Ω 20Ω 1.0μF GND 90mA SP1 Vout2 SP2 C3 2.0μF CE1 CE2 Main Display 1 LED：２０ｍＡ （TOTAL １６０ｍＡ） FB2 These figures are showing as the standard application example. The current values or so are considered whenever it is designed. In case of output capacitance C3 is connected to Vout0, capacitance C3 connecting to Vout1 and Vout2 may be omitted. The current value is just example for the explanation of this device function, please note that power dissipation should be taken care when the system is designed or define the current value. ■Power Dissipation If the ambient temperature is exceed than 25 degree C , it is derated with derating factor of 1.24mW/Degree C. ＜In case of assembled SEMI PCB((75 mm x 114 mm) ; 155 degree C/W＞ Power Dissipation［Ｗ The characteristics of P ow er D issipation（A ssbled on P C B ） 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 25 50 75 100 A m bient Tem perature[℃］ 125 150 ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 10) TOSHIBA TB62733FTG Output Voltage Ef f iciency Vo=Vf(LED)+0.4V 90% 3.8 80% 3.6 Efficiency(%) Output Voltage [V] 100% 4.0 3.4 3.2 3.0 Io=200m A Io=100m A Io=40m A 2.8 2.6 2.4 2.2 70% 60% 50% 40% Io= 40m A Io=100m A Io=200m A 30% 20% 10% 2.0 0% 2.5 3.0 3.5 4.0 4.5 2.5 3.0 Input V oltage [V ] 3.5 4.0 4.5 Input V oltage [V ] O utput V oltage operate ability Feedback V oltage Vｓｐ=0.4V 420.0 Feedback Voltage [mV] Output Voltage [V] 4.0 3.5 3.0 2.5 V in=2.7V V in=3.0V V in=3.3V 2.0 1.5 1.0 0 50 100 150 200 O utput C urrent [m A } 250 300 400.0 380.0 360.0 340.0 320.0 300.0 Io=200m A Io=100m A Io=40m A 280.0 260.0 240.0 220.0 2.5 3.0 3.5 4.0 4.5 Input V oltage [V ] ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 11) TOSHIBA TB62733FTG ■Package Dimension 2.3 Weight : g (typ.) ● This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 12)