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 )

Application Diagram

Vin

GND

FB1

SP1

2.0F

2.85.5V

1.0F

Vout1

1.0F

Brightness
Control
( Steps)

1.0F

QON24-0404-0.65

Weight

0.0g

(Typ.)

CE1

CE2

ON/OFF

Control

FB2

Vout2

Vout0

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
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 TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 2)

Block Diagram

Explanation of Terminals

Terminal

Number

Terminal Name

Function

Comments

1 NC

Vout 1

Output 1 Terminal

C1+

Capacitance Terminal for Charge Pump Capacitance for Charge Pump

C1-

Capacitance Terminal for Charge Pump Capacitance for Charge Pump

VIN

Power supply terminal

6 NC

7 NC

8 FB1 Feed Back Control Terminal

Setting feed back voltage by SP terminal (SP1,SP2)

9 NC

10 FB2

Feed Back Control Terminal

Setting feed back voltage by SP terminal (SP1,SP2)

11 NC

12 NC

13 NC

14 GND

Ground

C2-

Capacitance Terminal for Charge Pump Capacitance for Charge Pump

C2-

Capacitance Terminal for Charge Pump Capacitance for Charge Pump

17 Vout2

Output

Terminal

18 NC

SP2

Logic Input

Setting of feed back voltage

SP1

Logic Input

Setting of feed back voltage

Vout0

Output 0

Terminal for output Capacitor

CE1

Logic Input

On/ Off Control Terminal for Vout 1

CE2

Logic Input

On/ Off Control Terminal for Vout 2

Vin

Control

Logic

GND

ON/OFF

C1+

Vout1

C2+

FB1

SP1

SP2

FB2

Feed Back Circuit

FB1Prioritize
FB2In case "Vout"

Not In use

Vout2

CE1

CE2

Vout0

P-GND

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 3)

Absolute Maximum Ratings

Item Symbol

Conditions

Ratings

Unit

Power Supply

Vin

0.36.0 V

Input Voltage

Vin2

FB/CE/SP Terminal

0.3Vin+0.3 V

Output Current

Iout

250

Power Dissipation

Without PCB

With PCB

357

TBD

Operating Temperature

OPR

2585

Storage Temperature

STG

55150

Junction Temperature

150

When the ambient temperature is excess 25 degree C, it should be derating with 1.24mW/degree C.

Recommended Operating ConditionsTopr = -25 � 85 Degree C

Item Symbol

Conditions

Min.

Typ.

Max.

Unit

Power Supply

Vin

2.8

5.5

Logic Input Voltage

Vin V

Input Ripple Voltage

Vin(ripple)

40 mVpp

Capacitance for Charge Pump

C1/2

0.8

1.0

4.0

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 4)

Electrical Characteristics Vin3.6V, T

OPR

25, if it is not specified.

Item Symbol

Measur

ement
Circuit

Measurement Condition

Min.

Typ.

Max.

Unit

Input Voltage

Vin

2.8

5.5

Maximum Output Voltage

Vout

Vin=3.0V
Iout=100mA

4.0

SP1="L" , SP2="L"
Iout=0mA

(94) 100 (106)

SP1="L" , SP2="H"
Iout=0mA

(188) 200 (212)

SP1="H" , SP2="L"
Iout=0mA

(282) 300 (318)

Feed Back Terminal Voltage

Tolerance of Current Setting

FB1

FB2

SP1="H" , SP2="H"
Iout=0mA

(376) 400 (424)

Feed Back Terminal Input Current

0.5

Iout12

Vin=3.2VVout=4.2V
V

FB1

0.4V

110

Output Current Ability

Iout

(MAX)

Vin=3.2VVout=4.2V
V

FB1

0.4V

CE1="H"CE2="H"

180

Consumption Current

Vin=2.84.2V
Iout=100mA

5 mA

Stand By Consumption Current

DDSTB

Iout=0mA
CE1/2="L"

High V

Logic

Inputs

0.7�Vin

Logic Input Voltage

Low V

Logic

Inputs

0.3�Vin V

Logic Input Current

leak

Logic

Inputs

0.5

Auto Discharging

auto

CE1/CE2="L"
Vin=3.6V
Vout=4.0V

Vout Rise Time

Vin=2.8VIout=10mA
The transition time

when Vout from 0V to

500

Clock Frequency

OSC

0.85 1.2 1.55

MHz

Rush Current

RUSH

Rush Current at CE

"H"

500

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 5)

Explanation of Operations

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.

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.

Vin

Vout

Vin

Vout

3. By repeating the operation 1 and 2 described above, the voltage is

supplied to Vout around 1.5 times of Vin.

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 6)

Feed Back Voltage Control

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.

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)

FB1

2.0F

Vout1

FB2

2.0F

Vout2

Feed back

Control 1

1. Operate both Vout1 and Vout2

FB1

2.0F

Vout1

FB2

2.0F

Vout2

Feed Back

Control 1

Vout 1 operating

LED ON

Feed back

Control 2

LED OFF

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 7)

Truth Table for Current Control

SP1 SP2 FB

Control

Voltage LED Current at Resistor(R

)20

L L

0.1V

5mA

L H

0.2V

10mA

H L

0.3V

15mA

H H

0.4V

20mA

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

The brightness control is available with feed back voltage control.

FB1

2.0F

Vout1

FB2

2.0F

Vout2

Feed Back

Control 2

3. Vout 2 Operating

LED ON

Truth Table (CE1 and CE2)

CE1

CE2

Output Terminal

Feed Back Control

L L

None

H L

Vout1

FB1

L H

Vout2

FB2

H H

Vout1,Vout2

FB1FB2

LED OFF

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.

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 8)

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.

Vin

GND

FB1

SP1

SP2

2.84.2V

1.0F

Vout1

1.0F

20 20 20 20

Sub Display

1LED

Total 80 mA

0.4V

CE1

CE2

20 20 20 20

0.4V

FB2

Vout2

Main Display

1LED : 20

Total 80 mA

Vin

GND

FB1

SP1

SP2

2.84.2V

1.0F

Vout1

1.0F

20 20 20 20

Sub Display

1 LED 20 mA

Total 40 mA

0.4V

CE1

CE2

20 20

0.4V

FB2

Vout2

Main Display

1 LED18

Total 108 mA

20 20

Application Figure 1

Application Figure 2

2.0F

Vout0

2.0F

Vout0

These figures are showing as the standard application example. The current values or so are considered whenever it is designed.

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 9)

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.

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.

Key Pad

1 LED5 mA

Total 10 mA

2.84.2V

20 50

Vin

GND

FB1

SP1

SP2

1.0F

Vout1

1.0F

20 20 20 20

Sub Display

1 LED : 20 mA

Total 60 mA

0.4V

CE1

CE2

20 20 20

0.4V

FB2

Vout2

Main Display

1 LED20 mA

Total 80 mA

Application Figure 3

2.84.2V

Vin

GND

FB1

SP1

SP2

1.0F

Vout1

1.0F

20 20 20 20

0.4V

CE1

CE2

FB2

Vout2

Main Display

TOTAL 80

Application Figure 4

2.0F

Vout0

2.0F

Vout0

These figures are showing as the standard application example. The current values or so are considered whenever

it is

designed.

These figures are showing as the standard application example. The current values or so are considered whenever it is designed.

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 10)

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

2.84.2V

Vin

GND

FB1

SP1

SP2

2.0F

90mA

1.0F

Vout1

1.0F

20 20 20

0.4V

CE1

CE2

FB2

Vout2

Main Display

1 LED

TOTAL

Application Figure 5

2.0F

90mA

20 20 20

Vout0

2.0F

The characteristics of P ow er D issipationA ssbled on P C B

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

100

125

150

A m bient Tem perature[

iss

i
p

a
t
i

o
n

These figures are showing as the standard application example. The current values or so are considered whenever

it is

designed.

TOSHIBA TB62733FTG

This datasheet is tentative, the values and contents are subject to change without any notice.

27-Jul-04 (Rev1.7) TB62733FTG (Page. 11)

Output Voltage

Vo=Vf(LED)+0.4V

2.0

2.2

2.4

2.6

2.8

3.0

3.2

3.4

3.6

3.8

4.0

2.5

3.0

3.5

4.0

4.5

Input V oltage [V ]

Output Voltage [V

]

Io=200m A
Io=100m A
Io=40m A

Ef f iciency

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

2.5

3.0

3.5

4.0

4.5

Input V oltage [V ]

Effi

cy(%)

Io= 40m A
Io=100m A
Io=200m A

O utput V oltage operate ability

1.0

1.5

2.0

2.5

3.0

3.5

4.0

100

150

200

250

300

O utput C urrent [m A }

Output Voltage [V

]

V in=2.7V
V in=3.0V
V in=3.3V

Feedback V oltage

V=0.4V

220.0

240.0

260.0

280.0

300.0

320.0

340.0

360.0

380.0

400.0

420.0

2.5

3.0

3.5

4.0

4.5

Input V oltage [V ]

Feedback Voltage [mV]

Io=200m A
Io=100m A
Io=40m A

Электронный компонент: TB62733FTG