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TOSHIBA
TB62734FMG
TOSHIBA BiCD Digital Silicon Monolithic Integrated Circuit
TB62734FMG
Step Up Type DC - DC Converter for White LED
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=7.5 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=0.7(TYP.) @ Vin=2.8~5.5V Over voltage detection includes Protection Voltage : OVD pin =20V (TYP.)
TB62734FMG
SON8-P-0.65 Weight : 0.016g (Typical)
VCC
K
B36
B
RSENS GND PGND
CTL OVD A
2 6
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 = 230C, 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 = 245C, 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: 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
TOSHIBA
Block Diagram
Vin VCC 1 2.2 - 10 uH A 4 OVD 3
TB62734FMG
One Shot
C2=0.47uF
One Shot
33us min. 2 CTL
ADC
V th
Vref 8 K
10k
Vref=164mV
Range 1.0 - 2.5 V
GND
6
PGND
5
7
RSENS
3.3@Io=40mA 8.2@Io=20mA
Explanation of the terminal
No 1 2 3 4 5 6 7 Symbol VCC CTL OVD A PGND GND 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
Timing Chart
OSC = 1.0 MHz
TB62734FMG
LED * Vo
A Terminal Voltage
I A( peak )
By controlling I A( peak ) Stabilized Io that is set
A Terminal Current (External Inductor)
2.6V
CTL Terminal Current
(Vctl > 2.6V , No Brightness Control Function by CTL)
1.0V
3/11
TOSHIBA
Absolute Maximum Ratings (Topr = 25 C If not specified)
TB62734FMG
Item Power supply Voltage Input Voltage Switching Terminal Voltage OVD Voltage Power Dissipation Thermal Resistance Operating Temperature range Storage Temperature Maximum Junction Temperature
Symbol Vcc Vin Vo(A) V(ovd) Pd Rth(j-a)1 Rth(j-a)2 Topr Tstg Tj
Ratings - 0.3 to + 6.0 - 0.3 to + VCC + 0.3 - 0.3 to + 24 - 0.3 to + 18 0.41 (Device) 0.47 (With PCB) Note1 300 (Device) 260 (With PCB) - 40 to + 85 - 40 to + 150 125
Unit V V V V 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 LED Current (Average Value)
Symbol Vcc Vctl H Vctl L Io1 Io2 Io3
Measurement Condition VCC=3.6V, RSENS=7.5 6 LED, Topr=25 C, VCC=3.6V, RSENS=7.5 4 LED, Topr=25 C VCC=3.6V, RSENS=3.3 3 LED, Topr=25 C
Min. 2.8 VCC -0.5 0 -
Typ. 20 20 40
Max. 5.5 VCC
Unit V
V 0.4 mA mA mA
4/11
TOSHIBA
Electrical Characteristics (Topr=-40 to 85C, Vcc=2.8 to 5.5V, If not Specified)
TB62734FMG
Symbol Icc(On) Icc(Off) I_CTL Measurement Condition Vcc=3.6V, RSENS=8.2 Vcc=3.6V, VCTL=0V Vcc=3.0V, VCTL=3V Io(A)= greater than 400mA Vcc=3.6V, Vctl=3.0V Topr=25C 6 Series white LED are also driven Vo(A)=22V Vovd=18V VCC=3.6V, RSENS=7.5 Topr=25 C, L=6.8uH 0.75 24 19 18 Min. +/7 Typ. 0.9 0.5 +/12 0.7 1.0 26 600 0.5 21 0.5 20 Max. 1.5 1.0 +/21 1.5 1.39 1 23 1 22 Unit mA uA uA MHz V mA uA V uA mA
Item Operating Consumption Current Quiescent Consumption Current CTL Terminal Current
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)
5/11
TOSHIBA
[Setting of capacitance of output side] The larger than C2=0.47(uF) should be recommended.
TB62734FMG
[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 3 4 5 6 4.7 6.8 8.1 10 3.6 4.7 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 x Rsens 4LED : Io = 113.08 x Rsens
-0.8399 -0.854 -0.8614 -0.8534 -0.836
3LED : Io = 115.32 x Rsens 5LED : Io = 108.02 x Rsens 6LED : Io = 106.71 x 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.
50 45 40 Iout(mA) 35 30 25 20 15 10 0 2 4
RSENS vs Iout Vin=3.6V 2LED 3LED 4LED 5LED 6LED
6 RSENS()
8
10
12
6/11
TOSHIBA
[Current control by CTL pin]
TB62734FMG
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%.
100 80 Rate (%) 60 40 20 0 1.0
CTL Input - Output Rate / Output Current Vin=3.0V Io Rate Io
25 20 Io (mA) 15 10 5 0
1.5 VCTL (V)
2.0
2.5
7/11
TOSHIBA
TB62734FMG
(1) The example of Application Circuit and Measurement data : Inductor 1001AS Series (Toko) S-Di L L : 1001AS Series (Size 3.8x3.8x1.2mm) S-Di : CUS02 1A/30V (TOSHIBA) LED : NSCW215T (NICHIA)
Vin = 2.8 to 5.5V
Vcc
C1 = 2.2F
A
ODV
C2 = 1.0uF
Input - Efficiency / Output Current 5 LED Drive Io Efficiency Io (mA) 20
TB62734FMG
CTL PGND
GND
25
100 95 90 85
RSENS=7.5 2 LED Drive 3 to 5 LED Drive 6 LED Drive : L=4.7uH : L=6.8uH : L=10uH
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 2 LED Drive
100 95
Input - Efficiency / Output Current 6 LED Drive 25 Io Efficiency Io (mA) 20 100 Efficiency (%) 95 90 85 15 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5 Vin (V) 80
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
25
Input - Efficiency / Output Current 3 LED Drive
100 95
Efficiency (%)
Io (mA)
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
25 Io
Input - Efficiency / Output Current 4 LED Drive
100 95 90 85
Efficiency Io (mA) 20
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
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
Efficiency (%)
Efficiency (%)
Io (mA)
8/11
Efficiency (%)
K RSENS
TOSHIBA
L S-Di L S-Di LED
TB62734FMG
(2) example of Application Circuit and Measurement data : Inductor CXLD120 Series (Sumitomo)
: 1001AS Series (Size3.0x2.65x1.20mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA)
Vin = 2.8 to 5.5V
Vcc
C1 = 2.2F
A
ODV
C2 = 1.0uF
CTL
TB62734FMG
25 Io
Input - Efficiency / Output Current 5 LED Drive
100 95 90 85
RSENS=7.5 2 LED Drive 3 to 5 LED Drive 6 LED Drive : L=4.7uH : L=6.8uH : L=10uH
20
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 2 LED Drive
100 95
25 Io Efficiency (%)
Input - Efficiency / Output Current 6 LED Drive
100 95 90 85
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 4.6 4.9 5.2 5.5 Vin (V)
90 85 80
20
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 3 LED Drive
100 95
Efficiency (%)
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
25 Io
Input - Efficiency / Output Current 4 LED Drive
100 95 90 85
20
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
Efficiency (%)
Efficiency Io (mA)
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
Io (mA)
9/11
Efficiency (%)
Efficiency Io (mA)
Io (mA)
Efficiency (%)
PGND
GND
K RSENS
Efficiency Io (mA)
TOSHIBA
L S-Di L S-Di LED
TB62734FMG
(3) The example of Application Circuit and Measurement data : Inductor VLF3010 Series (TDK)
: VLF3010 Series (Size3.0x3.0x1.0mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA)
Vin = 2.8 to 5.5V
Vcc
C1 = 2.2F
A
ODV
C2 = 1.0uF
Input - Efficiency / Output Current 5 LED Drive Io Efficiency (%) Efficiency (%) Efficiency Io (mA) 20 95 90 85
CTL
TB62734FMG
GND
25
100
PGND
K RSENS
RSENS=7.5
2 LEDDrive 3 to 5 LED Drive 6 LED Drive
: L=4.7uH : L=6.8uH : L=10uH
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 2 LED Drive
100 95
25 Io
Input - Efficiency / Output Current 6 LED Drive
100 95 90 85
Efficiency (%)
Efficiency Io (mA) 20
Io (mA)
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 3 LED Drive
100 95
Efficiency (%)
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
25 Io
Input - Efficiency / Output Current 4 LED Drive
100 95 90 85
20
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
10/11
Efficiency (%)
Efficiency Io (mA)
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
Io (mA)
TOSHIBA
TB62734FMG
(3) The example of Application Circuit and Measurement data : Inductor CXML322509-150 (Sumitomo)
L S-Di
L S-Di LED
: CXML322509-150 (Size3.2x2.5x0.9mm) : CUS02 1A/30V (TOSHIBA) : NSCW215T (NICHIA)
Vin = 2.8 to 5.5V
Vcc
C1 = 2.2F
A
ODV
C2 = 1.0uF
25 Io Efficiency (%) Efficiency (%) Efficiency Io (mA) 20 95 90 85 Input - Efficiency / Output Current 5 LED Drive 100
CTL
TB62734FMG
GND
PGND
K RSENS
RSENS=7.5
2 to 6 LED Drive
: L=15uH
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 2 LED Drive
100 95
25 Io
Input - Efficiency / Output Current 6 LED Drive
100 95 90 85
Efficiency (%)
Efficiency Io (mA) 20
Io (mA)
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
25
Input - Efficiency / Output Current 3 LED Drive
100 95
20 Io Efficiency 15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
90 85 80
25 Io
Input - Efficiency / Output Current 4 LED Drive
100 95 90 85
20
15 2.8 3.1 3.4 3.7 4 4.3 Vin (V) 4.6 4.9 5.2 5.5
80
Efficiency (%)
Efficiency Io (mA)
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 (%)
Io (mA)
11/11
TOSHIBA
Package (Dimensions)
TB62734FMG
Unit : mm
12/11
TOSHIBA
Marking
TB62734FMG
1'st Half od year
(1 to 26 week)
B36
XXX
Weekly Code Ass'ly Code 1 PIN
Product Name
2'nd Half of year
(27 to 53 week)
B36
XXXX
13/11
TOSHIBA
TB62734FMG
14/11

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