TOSHIBA TB62734FMG TOSHIBA BiCD Digital Silicon Monolithic Integrated Circuit TB62734FMG Step Up Type DC – DC Converter for White LED SON8-P-0.65 Weight : 0.016g (Typical) K VCC CTL OVD A B36 Characteristics Brightness control function : LED forward current 30~100% Maximum output voltage : over 26V Variable of the LED current by external resistance 20mA(TYP.) @ RSENS=7.5Ω Output power : 500 mW Package : SON8-P-0.65 (Typical Height : 0.8mm) High efficiency : 85% (Recommended parts in use) Low resistance power MOS include Ron=0.7Ω(TYP.) @ Vin=2.8~5.5V Over voltage detection includes Protection Voltage : OVD pin =20V (TYP.) TB62734FMG 6 2 B Features TB62734FMG is the high efficient STEP-UP type DC/DC converter by which the optimal design was carried out at constant current driver of white LED. It is possible to drive 2 ~ 6 white LEDs which connected in series by the lithium ion battery. This IC contains the Nch-MOS transistor required for switching of external inductor. The forward current of LED is set up by the external resistor. As the brightness control function, an analog voltage input and a pulse input system (PWM) are possible. The switching frequency is fixed at around 1.0Mhz. This IC is the most suitable as a driver of white LED back lighting of the color LCD in the PDA, the cellular phone and the handy terminal machine. RSENS GND PGND Note 1) This IC has the terminal (3 pin : HBM spec < ±1.5kV) which is marginal for ESD. The careful caution must be required for all handling stage. And also, this device must be assembled in correct position, in case of Assembled in the wrong direction, this IC might be destroyed. Note 2) In case the control pin is open, unstable operation of the output should be caused. Therefore, this control terminal must be fixed to the certain logic level. Note 3) About solder ability, following conditions were confirmed •Solder ability (1)Use of Sn-63Pd solder Bath solder bath temperature = 230°C, dipping time = 5 seconds, the number of times = once, use of R-type flux (2)Use of Sn-3.0Ag-0.5Cu solder Bath solder bath temperature = 245°C, dipping time = 5 seconds, the number of times = once, use of R-type flux Company Headquarters 3 Northway Lane North Latham, New York 12110 Toll Free: 800.984.5337 Fax: 518.785.4725 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 TB62734FMG Block Diagram 2.2 - 10 uH Vin VCC A 1 4 OVD One Shot 3 C2=0.47uF One Shot Vref V th 33us min. 8 2 CTL K ADC Range 1.0 - 2.5 V 10k Vref=164mV GND 6 PGND 5 7 RSENS 3.3Ω@Io=40mA 8.2Ω@Io=20mA Explanation of the terminal No Symbol 1 VCC 2 CTL 3 OVD 4 A 5 PGND 6 GND 7 RSENS Function Supply voltage pin. Supply voltage range : 2.8V to 5.5V Input pin for IC ON/OFF control and variable LED Io. 0 to 0.4V : Shutdown Mode (IC shutdown) 1.0V to 2.5V : Io = 30 to 100% Variable (Linear Control) Over 2.6V : Io = 100% Feed-buck pin for output voltage Sink driver pin for step- up DC-DC converter Ground pin for power line Ground pin Resistance connects pin for LED Io setup. 8 K Connected to the cathode of LED *Please connect PGND and GND pin to the ground. 2/11 TOSHIBA TB62734FMG Timing Chart OSC = 1.0 MHz LED • Vo A Terminal Voltage By controlling I A( peak ) Stabilized Io that is set I A( peak ) A Terminal Current (External Inductor) 2.6V CTL Terminal Current (Vctl > 2.6V , No Brightness Control Function by CTL) 3/11 1.0V TOSHIBA TB62734FMG Absolute Maximum Ratings (Topr = 25 °C If not specified) Item Power supply Voltage Input Voltage Switching Terminal Voltage OVD Voltage Symbol Ratings Unit Vcc - 0.3 to + 6.0 V Vin - 0.3 to + VCC + 0.3 V Vo(A) - 0.3 to + 24 V V(ovd) V Power Dissipation Pd Thermal Resistance Rth(j-a)1 Rth(j-a)2 - 0.3 to + 18 0.41 (Device) 0.47 (With PCB) Note1 300 (Device) 260 (With PCB) Topr - 40 to + 85 Tstg - 40 to + 150 Tj 125 Operating Temperature range Storage Temperature Maximum Junction Temperature W °C/W °C Note 1 : 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 (Topr = -40 to 85 °C If not Specified) Item Power Supply Voltage CTL Terminal H level Input Voltage CTL Terminal L Level Input Voltage Symbol Measurement Condition Min. Typ. Max. Unit Vcc - 2.8 - 5.5 V Vctl H - VCC -0.5 - VCC V Vctl L Io1 LED Current (Average Value) Io2 Io3 VCC=3.6V, RSENS=7.5Ω 6 LED, Topr=25 °C, VCC=3.6V, RSENS=7.5Ω 4 LED, Topr=25 °C VCC=3.6V, RSENS=3.3Ω 3 LED, Topr=25 °C 4/11 0 - 0.4 - 20 - mA - 20 - mA - 40 - mA TOSHIBA TB62734FMG Electrical Characteristics (Topr=-40 to 85°C, Vcc=2.8 to 5.5V, If not Specified) Item Operating Consumption Current Quiescent Consumption Current Symbol Measurement Condition Min. Typ. Max. Unit Icc(On) Vcc=3.6V, RSENS=8.2Ω - 0.9 1.5 mA Icc(Off) Vcc=3.6V, VCTL=0V - 0.5 1.0 uA CTL Terminal Current I_CTL Vcc=3.0V, VCTL=3V +/7 +/12 +/21 uA 0.7 1.5 Ω Integrated MOS-Tr Ron ON Resistance Integrated MOS-Tr fOSC Switching Frequency A Terminal Protection Vo(A) Voltage Switching Terminal Io(A) Current Switching Terminal Ioz(A) Leakage Current OVD Terminal Vovd Voltage OVD Terminal Ioz(ovd) Leakage Current LED Current Io2 (Average Value) Io(A)= greater than 400mA Vcc=3.6V, Vctl=3.0V Topr=25°C 0.75 1.0 1.39 MHz 6 Series white LED are also driven 24 26 - V - - 600 - mA Vo(A)=22V - 0.5 1 uA - 19 21 23 V Vovd=18V - 0.5 1 uA VCC=3.6V, RSENS=7.5Ω Topr=25 °C, L=6.8uH 18 20 22 mA 5/11 TOSHIBA TB62734FMG [Setting of capacitance of output side] The larger than C2=0.47(uF) should be recommended. [Setting of external Inductor size] Reference) According to the number of LED, the inductor size should be selected larger than the value indicated in the table. Number of LED Vin=2.8V Vin=4.3V Note 2 4.7 3.6 4 6.8 4.7 5 8.1 6.8 6 10 8.1 3 Io=20mA Unit : uH [Setting of Io] Resistance connects between RSENS pin and GND. The resistor of RSENS (K terminal and Ground) is for setting of output current (Io). The average current is set by this RSENS value and average current are obtained by the following equation. (Please choose a equation according to the number of LED) -0.8399 2LED : Io = 119.16 × Rsens -0.854 3LED : Io = 115.32 × Rsens -0.8614 4LED : Io = 113.08 × Rsens -0.8534 5LED : Io = 108.02 × Rsens -0.836 6LED : Io = 106.71 × Rsens It is an equation when setting up by inductor of the size which we recommend. When different L from the size which we recommend is used, The average current cannot be computed with the above-mentioned equation. RSENS vs Iout Vin=3.6V Iout(mA) 50 45 2LED 40 3LED 4LED 35 5LED 30 6LED 25 20 15 10 0 2 4 6 RSENS(Ω) 6/11 8 10 12 TOSHIBA TB62734FMG [Current control by CTL pin] This IC can carry out variable of the Io current by external resistance.Variable range : 30 to 100% CTL Voltage VCTL=0V to 0.4V VCTL=1V to2.5V VCTL>2.5V Note Io Valuable Rate 0 30 - 100 100 Unit : % The tole rance of linearity when converting V-A is expecting to be +/- 10%. CTL Input - Output Rate / Output Current Vin=3.0V Io Rate 80 Rate (%) 25 20 Io 60 15 40 10 20 5 0 0 1.0 1.5 2.0 VCTL (V) 7/11 2.5 Io (mA) 100 TOSHIBA TB62734FMG (1) The example of Application Circuit and Measurement data : Inductor 1001AS Series (Toko) S-Di L L : 1001AS Series (Size 3.8×3.8×1.2mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA) TB62734FMG CTL GND K RSENS 100 Io 95 Efficiency Io (mA) PGND Input - Efficiency / Output Current 5 LED Drive 25 RSENS=7.5Ω 20 Efficiency (%) C1 = 2.2µF Vin = 2.8 to 5.5V ODV C2 = 1.0uF A Vcc 90 85 15 : L=4.7uH : L=6.8uH : L=10uH 85 Io 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 100 25 Io 95 Efficiency Io (mA) Io (mA) 90 20 3.4 Input - Efficiency / Output Current 6 LED Drive 100 95 3.1 90 20 85 Efficiency 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 Input - Efficiency / Output Current 3 LED Drive 25 90 Io 85 15 80 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 4 LED Drive 25 100 Io 95 Io (mA) Efficiency 20 90 85 15 Efficiency (%) 3.4 80 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 3.7 4 4.3 4.6 4.9 5.2 5.5 <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Average Efficiency (%) Efficiency(%) 2 LED 87.25 to 91.90 90.00 3 LED 85.04 to 88.75 87.24 4 LED 83.18 to 86.95 85.50 5 LED 81.15 to 85.36 83.93 6 LED 82.11 to 85.87 84.35 Output Current in the range of Vin=2.8 to 5.5V Output Current Tolerance (%) (mA) 2 LED 20.90 to 23.96 14.65 (5.87) 3 LED 20.80 to 22.62 8.77 (3.88) 4 LED 20.18 to 21.78 7.89 (3.66) 5 LED 19.82 to 21.34 7.67 (3.47) 6 LED 19.95 to 21.40 7.26 (3.22) ( ) : renge of Vin=3.0 to 4.3 V Efficiency 3.1 3.4 100 20 2.8 3.1 Vin (V) 95 Io (mA) 2.8 5.5 Efficiency (%) 2.8 80 15 80 15 4.9 5.2 5.5 8/11 Efficiency (%) Input - Efficiency / Output Current 2 LED Drive 25 80 2.8 Efficiency (%) 2 LED Drive 3 to 5 LED Drive 6 LED Drive TOSHIBA TB62734FMG (2) example of Application Circuit and Measurement data : Inductor CXLD120 Series (Sumitomo) S-Di L A C2 = 1.0uF K RSENS 25 100 Io 95 Efficiency Io (mA) GND Input - Efficiency / Output Current 5 LED Drive RSENS=7.5Ω 90 20 85 2 LED Drive 3 to 5 LED Drive 6 LED Drive : L=4.7uH : L=6.8uH : L=10uH 25 80 15 2.8 Input - Efficiency / Output Current 2 LED Drive 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 6 LED Drive 25 100 Efficiency (%) CTL PGND : 1001AS Series (Size3.0×2.65×1.20mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA) ODV TB62734FMG C1 = 2.2µF Vin = 2.8 to 5.5V Vcc L S-Di LED 100 85 Efficiency 80 15 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 Input - Efficiency / Output Current 3 LED Drive Io 85 Efficiency (%) Io (mA) 90 Efficiency 80 15 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 4 LED Drive 25 100 Io (mA) Efficiency 95 90 20 85 Efficiency (%) Io 80 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 100 20 3.1 80 2.8 95 2.8 85 15 5.5 Vin (V) 25 90 20 Efficiency (%) Io 95 Efficiency Io (mA) Io (mA) 90 20 Efficiency (%) Io 95 4.9 5.2 5.5 9/11 <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Average Efficiency(%) Efficiency (%) 2 LED 87.34 to 91.82 89.87 3 LED 85.46 to 89.50 87.81 4 LED 84.22 to 87.99 86.33 5 LED 81.65 to 86.49 84.84 6 LED 83.53 to 87.63 86.15 Output Current in the range of Vin=2.8 to 5.5V Output Current Tolerance (%) (mA) 2 LED 20.93 to 24.06 14.95 (6.01) 3 LED 20.69 to 22.56 9.02 (3.96) 4 LED 20.22 to 21.77 7.66 (3.49) 5 LED 19.78 to 21.30 7.69 (3.51) 6 LED 20.28 to 21.55 6.28 (2.71) ( ) : renge of Vin=3.0 to 4.3 V TOSHIBA TB62734FMG (3) The example of Application Circuit and Measurement data : Inductor VLF3010 Series (TDK) S-Di L A C2 = 1.0uF RSENS=7.5Ω 100 Io 95 Efficiency Io (mA) PGND K RSENS Input - Efficiency / Output Current 5 LED Drive 25 20 90 85 2 LEDDrive 3 to 5 LED Drive 6 LED Drive : L=4.7uH : L=6.8uH : L=10uH 80 15 2.8 Input - Efficiency / Output Current 2 LED Drive 25 100 Efficiency (%) CTL GND : VLF3010 Series (Size3.0×3.0×1.0mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA) ODV TB62734FMG C1 = 2.2µF Vin = 2.8 to 5.5V Vcc L S-Di LED 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 6 LED Drive 25 100 Io 85 90 20 85 Efficiency (%) 90 20 95 Efficiency Io (mA) Io (mA) 95 Efficiency (%) Io Efficiency 80 15 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 Input - Efficiency / Output Current 3 LED Drive 25 2.8 Io (mA) 20 90 Io 85 Efficiency 80 15 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 4 LED Drive 25 100 95 Io (mA) Efficiency 20 90 85 Efficiency (%) Io 80 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 100 95 2.8 80 15 5.5 Efficiency (%) 2.8 4.9 5.2 5.5 10/11 <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Average Efficiency(%) Efficiency (%) 2 LED 85.70 to 90.39 88.47 3 LED 84.51 to 88.15 86.76 4 LED 83.06 to 86.97 85.30 5 LED 80.94 to 85.78 84.07 6 LED 82.28 to 86.85 85.11 Output Current in the range of Vin=2.8 to 5.5V Output Current Tolerance (%) (mA) 2 LED 21.00 to 24.01 14.35 (5.53) 3 LED 20.57 to 22.48 9.27 (4.06) 4 LED 20.03 to 21.69 8.24 (3.74) 5 LED 19.44 to 21.14 8.75 (4.07) 6 LED 19.96 to 21.46 7.52 (3.40) ( ) : renge of Vin=3.0 to 4.3 V TOSHIBA TB62734FMG (3) The example of Application Circuit and Measurement data : Inductor CXML322509-150 (Sumitomo) S-Di C2 = 1.0uF C1 = 2.2µF Vin = 2.8 to 5.5V ODV TB62734FMG CTL PGND GND : CXML322509-150 (Size3.2×2.5×0.9mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA) K RSENS RSENS=7.5Ω Input - Efficiency / Output Current 5 LED Drive 25 100 Io 95 Efficiency 90 20 85 2 to 6 LED Drive 2.8 Input - Efficiency / Output Current 2 LED Drive 25 80 15 : L=15uH 100 Efficiency (%) A Vcc L S-Di LED Io (mA) L 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 6 LED Drive 25 100 Io 85 90 20 85 Efficiency 80 15 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 Input - Efficiency / Output Current 3 LED Drive 25 2.8 Io (mA) 20 90 85 Io Efficiency 80 15 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 Input - Efficiency / Output Current 4 LED Drive 25 100 95 Io (mA) Efficiency 20 90 85 Efficiency (%) Io 80 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5 100 95 2.8 80 15 5.5 Efficiency (%) 2.8 4.9 5.2 5.5 11/11 <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Average Efficiency(%) Efficiency (%) 2 LED 88.75 to 91.85 90.07 3 LED 86.77 to 88.22 87.13 4 LED 84.00 to 85.65 84.71 5 LED 82.13 to 84.38 83.34 6 LED 80.39 to 82.92 81.98 Output Current in the range of Vin=2.8 to 5.5V Output Current Tolerance (%) (mA) 2 LED 22.00 to 24.04 9.30 (3.85) 3 LED 21.39 to 23.00 7.49 (3.56) 4 LED 20.82 to 22.41 7.61 (3.65) 5 LED 20.39 to 21.99 7.82 (3.75) 6 LED 19.84 to 21.57 8.69 (4.26) ( ) : renge of Vin=3.0 to 4.3 V Efficiency (%) 90 20 95 Efficiency Io (mA) Io (mA) 95 Efficiency (%) Io TOSHIBA TB62734FMG Package (Dimensions) Unit : mm 12/11 TOSHIBA TB62734FMG Marking B36 1’st Half od year (1 to 26 week) XXX (27 to 53 week) Ass'ly Code Weekly Code 1 PIN 2’nd Half of year B36 XXXX 13/11 Product Name TOSHIBA TB62734FMG 14/11