TB62734FMG MARKTECH | Alldatasheet

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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. 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 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.) 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 VCC CTL OVD A K RSENS GND PGND B B 3 6 Weight : 0.016g (Typical) SON8-P-0.65 TB62734FMG Company Headquarters

3 Northway Lane North

Latham, New York 12110 Toll Free: 800.984.5337 Fax: 518.785.4725 Web: www.marktechopto.com | Email: info@marktechopto.com California Sales Office:

950 South Coast Drive, Suite 265

Costa Mesa, California 92626 Toll Free: 800.984.5337 Fax: 714.850.9314 Company Headquarters Latham, New York 12110 Toll Free: 800.984.5337 Fax: 518.785.4725 Web: www.marktechopto.com | Email: info@marktechopto.com California Sales Office: Costa Mesa, California 92626 Toll Free: 800.984.5337 Fax: 714.850.9314

Explanation of the terminal No Symbol Function VCC Supply voltage pin. Supply voltage range : 2.8V to 5.5V CTL 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% OVD Feed-buck pin for output voltage A Sink driver pin for step- up DC-DC converter PGND Ground pin for power line GND Ground pin RSENS Resistance connects pin for LED Io setup. K Connected to the cathode of LED *Please connect PGND and GND pin to the ground. 2.2 - 10 uH VCC A CTL K OVD Vin 33us min. Range 1.0 - 2.5 V RSENS Vref Vth One Shot One Shot 10k PGND GND ADC Vref=164mV 3.3Ω@Io=40mA 8.2Ω@Io=20mA C2=0.47uF

I A( peak ) LED • Vo OSC = 1.0 MHz 2.6V 1.0V By controlling I A( peak ) Stabilized Io that is set (Vctl > 2.6V , No Brightness Control Function by CTL) A Terminal Voltage A Terminal Current (External Inductor) CTL Terminal Current

Absolute Maximum Ratings (Topr = 25 °C If not specified) Item Symbol Ratings Unit Power supply Voltage Vcc - 0.3 to + 6.0 V Input Voltage Vin - 0.3 to + VCC + 0.3 V Switching Terminal Voltage Vo(A) - 0.3 to + 24 V OVD Voltage V(ovd) - 0.3 to + 18 V 0.41 (Device) Power Dissipation Pd 0.47 (With PCB) Note1 W Rth(j-a)1 300 (Device) Thermal Resistance Rth(j-a)2 260 (With PCB) °C/W Operating Temperature range Topr - 40 to + 85 Storage Temperature Tstg - 40 to + 150 Maximum Junction Temperature Tj 125 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 Symbol Measurement Condition Min. Typ. Max. Unit Power Supply Voltage Vcc 2.8 5.5 V CTL Terminal H level Input Voltage Vctl H VCC -0.5 VCC CTL Terminal L Level Input Voltage Vctl L 0.4 V Io1 VCC=3.6V, RSENS=7.5Ω

6 LED, Topr=25 °C,

VCC=3.6V, RSENS=7.5Ω

4 LED, Topr=25 °C

(Average Value) Io3 VCC=3.6V, RSENS=3.3Ω

3 LED, Topr=25 °C

Electrical Characteristics (Topr=-40 to 85°C, Vcc=2.8 to 5.5V, If not Specified) Item Symbol Measurement Condition Min. Typ. Max. Unit Operating Consumption Current Icc(On) Vcc=3.6V, RSENS=8.2Ω 0.9 1.5 mA Quiescent Consumption Current Icc(Off) Vcc=3.6V, VCTL=0V 0.5 1.0 uA CTL Terminal Current I_CTL Vcc=3.0V, VCTL=3V +/- +/- +/- uA Integrated MOS-Tr ON Resistance Ron Io(A)= greater than 400mA 0.7 1.5 Ω Integrated MOS-Tr Switching Frequency fOSC Vcc=3.6V, Vctl=3.0V Topr=25°C 0.75 1.0 1.39 MHz A Terminal Protection Voltage Vo(A)

6 Series white LED are also

V Switching Terminal Current Io(A) 600 mA Switching Terminal Leakage Current Ioz(A) Vo(A)=22V 0.5 uA OVD Terminal Voltage Vovd V OVD Terminal Leakage Current Ioz(ovd) Vovd=18V 0.5 uA LED Current (Average Value) Io2 VCC=3.6V, RSENS=7.5Ω Topr=25 °C, L=6.8uH mA

[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 4.7 3.6 6.8 4.7 8.1 6.8 8.1 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) 2LED : Io = 119.16 × Rsens-0.8399 3LED : Io = 115.32 × Rsens-0.854 4LED : Io = 113.08 × Rsens-0.8614 5LED : Io = 108.02 × Rsens-0.8534 6LED : Io = 106.71 × Rsens-0.836 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 RSENS(Ω) Iout(mA) 2LED 3LED 4LED 5LED 6LED

[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 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 100 1.0 1.5 2.0 2.5 VCTL (V) Rate (%) Io (mA) Io Rate Io

RSENS=7.5Ω

2 LED Drive

: L=4.7uH 3 to 5 LED Drive : L=6.8uH

6 LED Drive

: L=10uH Vcc A Vin = 2.8 to 5.5V ODV CTL K PGND GND RSENS C2 = 1.0uF TB62734FMG C1 = 2.2µF S-Di L (1) The example of Application Circuit and Measurement data : Inductor 1001AS Series (Toko) <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Efficiency (%) Average 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 (mA) Tolerance (%) 20.90 to 23.96 14.65 (5.87) 20.80 to 22.62 8.77 (3.88) 20.18 to 21.78 7.89 (3.66) 19.82 to 21.34 7.67 (3.47) 19.95 to 21.40 7.26 (3.22) ( ) : renge of Vin=3.0 to 4.3 V L : 1001AS Series (Size 3.8×3.8×1.2mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA) Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current

3 LED Drive

2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current

4 LED Drive

2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current

5 LED Drive

2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency

RSENS=7.5Ω : L=4.7uH 3 to 5 LED Drive : L=6.8uH : L=10uH Vcc A Vin = 2.8 to 5.5V ODV CTL K PGND GND RSENS C2 = 1.0uF TB62734FMG C1 = 2.2µF S-Di L (2) example of Application Circuit and Measurement data : Inductor CXLD120 Series (Sumitomo) <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Efficiency(%) Average Efficiency (%) 87.34 to 91.82 89.87 85.46 to 89.50 87.81 84.22 to 87.99 86.33 81.65 to 86.49 84.84 83.53 to 87.63 86.15 Output Current in the range of Vin=2.8 to 5.5V Output Current (mA) Tolerance (%) 20.93 to 24.06 14.95 (6.01) 20.69 to 22.56 9.02 (3.96) 20.22 to 21.77 7.66 (3.49) 19.78 to 21.30 7.69 (3.51) 20.28 to 21.55 6.28 (2.71) ( ) : renge of Vin=3.0 to 4.3 V L : 1001AS Series (Size3.0×2.65×1.20mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA) Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency

RSENS=7.5Ω

2 LEDDrive

: L=4.7uH 3 to 5 LED Drive : L=6.8uH : L=10uH Vcc A Vin = 2.8 to 5.5V ODV CTL K PGND GND RSENS C2 = 1.0uF TB62734FMG C1 = 2.2µF S-Di L (3) The example of Application Circuit and Measurement data : Inductor VLF3010 Series (TDK) L : VLF3010 Series (Size3.0×3.0×1.0mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA) <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Efficiency(%) Average Efficiency (%) 85.70 to 90.39 88.47 84.51 to 88.15 86.76 83.06 to 86.97 85.30 80.94 to 85.78 84.07 82.28 to 86.85 85.11 Output Current in the range of Vin=2.8 to 5.5V Output Current (mA) Tolerance (%) 21.00 to 24.01 14.35 (5.53) 20.57 to 22.48 9.27 (4.06) 20.03 to 21.69 8.24 (3.74) 19.44 to 21.14 8.75 (4.07) 19.96 to 21.46 7.52 (3.40) ( ) : renge of Vin=3.0 to 4.3 V Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency

RSENS=7.5Ω 2 to 6 LED Drive : L=15uH Vcc A Vin = 2.8 to 5.5V ODV CTL K PGND GND RSENS C2 = 1.0uF TB62734FMG C1 = 2.2µF S-Di L (3) The example of Application Circuit and Measurement data : Inductor CXML322509-150 (Sumitomo) <Measurement Data> Efficiency in the range of Vin=2.8 to 5.5V Efficiency(%) Average Efficiency (%) 88.75 to 91.85 90.07 86.77 to 88.22 87.13 84.00 to 85.65 84.71 82.13 to 84.38 83.34 80.39 to 82.92 81.98 Output Current in the range of Vin=2.8 to 5.5V Output Current (mA) Tolerance (%) 22.00 to 24.04 9.30 (3.85) 21.39 to 23.00 7.49 (3.56) 20.82 to 22.41 7.61 (3.65) 20.39 to 21.99 7.82 (3.75) 19.84 to 21.57 8.69 (4.26) ( ) : renge of Vin=3.0 to 4.3 V L : CXML322509-150 (Size3.2×2.5×0.9mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA) Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency Input - Efficiency / Output Current 2.8 3.1 3.4 3.7 4.3 4.6 4.9 5.2 5.5 Vin (V) Io (mA) 100 Efficiency (%) Io Efficiency

Package (Dimensions) Unit : mm

Ass'ly Code

1 PIN

1’st Half od year (1 to 26 week) 2’nd Half of year (27 to 53 week)