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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
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
1.5 times Charge Pump type step up DC to DC converter
・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%)
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)
At the same time.
■Function
■Features
・Auto Discharge function equipped
・Integrated protection circuit TSD (Thermal Shut Down )
Application Diagram
2.8～5.5V
Brightness
Control
４ Steps)
ON/OFF
Control
C1
1.0μF
C2
1.0μF
C4
1.0μF
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP1
CE1
CE2
Vou t0
Vou t1
FB1
Vou t2
FB2
C3
2.0μF
（ＶQON24-0404-0.65）
Weight： 0.0g (Typ.)
Company Headquarters
Company Headquarters
3 Northway Lane North
3 Northway Lane North
Latham, New York 12110
Latham, New York 12110
Toll Free: 800.984.5337
Toll Free: 800.984.5337
Fax: 518.785.4725 Web: www.marktechopto.com | Email: info@marktechopto.com
Fax: 518.785.4725 Web: www.marktechopto.com | Email: info@marktechopto.com
950 South Coast Drive, Suite 265
950 South Coast Drive, Suite 265
California Sales Office:
California Sales Office:
Costa Mesa, California 92626
Costa Mesa, California 92626
Toll Free: 800.984.5337
Toll Free: 800.984.5337
Fax: 714.850.9314
Fax: 714.850.9314
TOSHIBA TB62733FTG
■ Block Diagram
■ Explanation of Terminals
Terminal
Number
1 NC
2 Vout 1 Output 1 Terminal
3
4
5
6 NC
7 NC
8 FB1
9 NC
10 FB2
11 N C
12 NC
13 NC
14 GND Ground
15
16
17 Vout2 Output 2 Terminal
18 NC
19 SP2 Logic Input Setting of feed back voltage
20 SP1 Logic Input Setting of feed back voltage
21 Vout0 Output 0 Terminal for output Capacitor
22 NC
23 CE1 Logic Input On/ Off Control Terminal for Vout 1
24 CE2 Logic Input On/ Off Control Terminal for Vout 2
C2+
C2－
Vin
SP1
Control
SP2
GND
Logic
CE1 CE2
Terminal Name Function Comments
C1+ Capacitance Terminal for Charge Pump Capacitance for Charge Pump
C1- Capacitance Terminal for Charge Pump Capacitance for Charge Pump
VIN Power supply terminal
Feed Back Control Terminal
Feed Back Control Terminal
C2- Capacitance Terminal for Charge Pump Capacitance for Charge Pump
C2- Capacitance Terminal for Charge Pump Capacitance for Charge Pump
C1+
C1－
Vout0
Vout1
Vout2
ON/OFF
Feed Back Circuit
FB1：Prioritize
FB2：In case "Vout１"
Not In use
P-GND
FB1
FB2
Setting feed back voltage by SP terminal (SP1,SP2)
Setting feed back voltage by SP terminal (SP1,SP2)
● 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 Symbol Conditions Ratings Unit
Power Supply Vin － －0.3～6.0 V
Input Voltage Vin2 FB/CE/SP Terminal －0.3～Vin+0.3 V
Output Current Iout － 250 mA
Power Dissipation ＰＤ
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 Min. Typ. Max. Unit
Power Supply Vin － 2.8 5.5 V
Logic Input Voltage VCE 0 － Vin V
Input Ripple Voltage Vin(ripple) － － － 40 mVpp
Capacitance for Charge Pump C1/2 0.8 1.0 4.0 μF
Without PCB
With PCB
357
TBD
ｍＷ
● 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
■Electrical Characteristics （Vin＝3.6V, T
Item Symbol
Input Voltage Vin 2.8 5.5 V
Maximum Output Voltage Vout
Feed Back Terminal Voltage
（Tolerance of Current Setting）
Feed Back Terminal Input Current IFB － － 0.5 μA
Iout1／2
Output Current Ability
Iout
Consumption Current IDD
Stand By Consumption Current IDDSTB
Logic Input Voltage
Logic Input Current Ileak Logic Inputs － － 0.5 μA
Auto Discharging
High VIH Logic Inputs 0.7×Vin － － V
Low V
Vout Rise Time
Clock Frequency fOSC 0.85 1.2 1.55 MHz
Rush Current
OPR＝25℃, if it is not specified.）
Measur
ement
Circuit
FB1
V
VFB2
(MAX)
IL Logic Inputs － － 0.3×Vin V
I
auto
I
RUSH
Measurement Condition Min. Typ. Max. Unit
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
Vin=3.2V，Vout=4.2V
V
FB1＝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"
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"
4.0 － － V
(94) 100 (106) mV
(188) 200 (212) mV
(282) 300 (318) mV
(376) 400 (424) mV
90 110 － mA
180 － － mA
－ －
－ － 1 μA
－
7
－ － 500 μs
－ － 500
5 mA
－
mA
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
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
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.
3. By repeating the operation 1 and 2 described above, the voltage is
supplied to Vout around 1.5 times of Vin.
Vin Vout
C1
C2
Vin Vout
C1
C2
● 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
Feed back
Control 1
Feed back
Control 2
Vout1
FB1
Vout2
FB2
C3
2.0μF
C3
2.0μF
RX
RX
LED ON
LED ON
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
Feed Back
Control 1
Vout1
FB1
Vout2
FB2
C3
2.0μF
C3
2.0μF
RX
RX
LED ON
LED OFF
● 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
● This datasheet is tentative, the values and contents are subject to change without any notice.
3. Vout 2 Operating
Feed Back
Control 2
Vout1
FB1
Vout2
FB2
C3
2.0μF
C3
2.0μF
RX
RX
LED OFF
LED ON
Truth Table (CE1 and CE2)
CE1 CE2 Output Terminal Feed Back Control
L L None None
H L Vout1 FB1
L H Vout2 FB2
H H Vout1,Vout2
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.
LED＝VFB／RX
I
The brightness control is available with feed back voltage control.
Truth Table for Current Control
SP1 SP2 FB Control Voltage
LED Current at Resistor(R
X)＝20Ω
L L 0.1V 5mA
L H 0.2V 10mA
H L 0.3V 15mA
H H 0.4V 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.
27-Jul-04 (Rev1.7) TB62733FTG (Page. 7)
TOSHIBA TB62733FTG
App
App
■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.
lication Figure 1
C1
1.0μF
C2
1.0μF
2.8～4.2V
C4
1.0μF
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP2
CE1
CE2
Vout1
FB1
Vout0
Vout2
FB2
0.4V
0.4V
C3
2.0μF
20Ω 20Ω 20Ω 20Ω
20Ω 20Ω 20Ω 20Ω
Main Display
1LED : 20 ｍＡ
（Tot a l 8 0 mA）
Sub Display
1LED：２０ｍＡ
（Tot a l 80 m A ）
lication Figure 2
C1
1.0μF
C2
1.0μF
2.8～4.2V
C4
1.0μF
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP2
CE1
CE2
● This datasheet is tentative, the values and contents are subject to change without any notice.
Vout1
FB1
Vou t0
Vout2
FB2
0.4V
0.4V
C3
2.0μF
20Ω 20Ω 20Ω 20Ω
20Ω 20Ω
Main Display
1 LED：18ｍＡ
（Tot a l 108 mA）
20Ω 20Ω
Sub Display
1 LED ：20 mA
（Tot a l 40 m A ）
27-Jul-04 (Rev1.7) TB62733FTG (Page. 8)
TOSHIBA TB62733FTG
App
App
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.
2.8～4.2V
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.
lication Figure 3
C1
1.0μF
C2
1.0μF
C4
1.0μF
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP2
CE1
CE2
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
Vout1
FB1
Vout0
Vout2
FB2
0.4V
0.4V
C3
2.0μF
20Ω 20Ω 20Ω 20Ω
20Ω 20Ω 20Ω
Main Display
1 LED：20 mA
（Total 80 mA）
Sub Display
1 LED : 20 mA
（Total 60 mA）
20Ω 50Ω
Key Pad
1 LED：5 mA
（Tot a l 10 m A ）
lication Figure 4
C1
1.0μF
C2
1.0μF
2.8～4.2V
C4
1.0μF
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP2
CE1
CE2
Vout1
FB1
Vou t0
Vout2
FB2
NC
NC
0.4V
C3
2.0μF
20Ω 20Ω 20Ω 20Ω
Main Display
１灯：20 ｍＡ
（TOTAL 80ｍＡ）
● 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
App
Ｗ
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＞
lication Figure 5
C1
1.0μF
C2
1.0μF
2.8～4.2V
C4
1.0μF
The characteristic s o f P o w e r D issipation（A ssbled on P C B ）
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
Power Dissipation［
0.1
0
0 25 50 75 100 125 150
C1＋
C1－
C2＋
C2－
Vin
GND
SP1
SP2
CE1
CE2
90mA
Vout1
FB1
Vout0
Vout2
FB2
0.4V
90mA
C3
2.0μF
C３
2.0μF
C3
2.0μF
20Ω 20Ω 20Ω
Ambie n t T e m p e ra tu re [℃ ］
20Ω
20Ω 20Ω 20Ω 20Ω
Main Display
1 LED：２０ｍＡ
（TOTAL １６０ｍＡ）
● 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
Vo=V f(LE D)+0.4V
4.0
3.8
3.6
3.4
3.2
3.0
2.8
2.6
2.4
Output Voltage [V
2.2
2.0
2.53.03.54.04.5
Io=200m A
Io=100m A
Io=40m A
In p u t V o ltage [V ]
Output Voltage ope rate ability
4.0
3.5
3.0
2.5
2.0
1.5
Output Voltage [V
1.0
0 50 100 150 200 250 300
Vin=2.7V
Vin=3.0V
Vin=3.3V
O u tpu t C u rre n t [m A }
Efficiency
100%
90%
80%
70%
60%
50%
40%
30%
Efficiency(%)
20%
10%
0%
2.53.03.54.04.5
Io= 40m A
Io=100m A
Io=200m A
In p u t V o ltage [V ]
Feedback V oltage
420.0
400.0
380.0
360.0
340.0
320.0
300.0
280.0
260.0
Feedback Voltage [mV]
240.0
220.0
2.53.03.54.04.5
Vｓｐ=0.4V
Io=200m A
Io=100m A
Io=40m A
In p u t V o ltage [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)
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