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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 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
C1 C1 C2 C2 Vin GND FB1 Vout1 Vout0 C3
2.0F
QON24-0404-0.65 Weight 0.0g (Typ.)
C1
1.0F
C2
1.0F
2.85.5V C4
1.0F
Brightness Control ( Steps)
SP1 SP1 CE1
Vout2
ON/OFF Control
FB2
CE2
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
C2+ C2 C1+ C1
TB62733FTG
Vout0 Vin Vout1
Vout2 ON/OFF SP1
Control
SP2
Logic
Feed Back Circuit FB1Prioritize FB2In case "Vout" Not In use
FB1 FB2
GND
CE1
CE2
P-GND
Explanation of Terminals Terminal Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Terminal Name NC Vout 1 C1+ C1VIN NC NC FB1 NC FB2 NC NC NC GND C2C2Vout2 NC SP2 SP1 Vout0 NC CE1 CE2 Function Comments
Output 1 Terminal Capacitance Terminal for Charge Pump Capacitance Terminal for Charge Pump Power supply terminal
Capacitance for Charge Pump Capacitance for Charge Pump
Feed Back Control Terminal Feed Back Control Terminal
Setting feed back voltage by SP terminal (SP1,SP2) Setting feed back voltage by SP terminal (SP1,SP2)
Ground Capacitance Terminal for Charge Pump Capacitance Terminal for Charge Pump Output 2 Terminal Logic Input Logic Input Output 0 Logic Input Logic Input
Capacitance for Charge Pump Capacitance for Charge Pump
Setting of feed back voltage Setting of feed back voltage Terminal for output Capacitor On/ Off Control Terminal for Vout 1 On/ Off Control Terminal for Vout 2
This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 2)
TOSHIBA
Absolute Maximum Ratings Item Power Supply Input Voltage Output Current Symbol Vin Vin2 Iout Conditions
TB62733FTG
Ratings Unit V V mA
0.36.0 FB/CE/SP Terminal 0.3Vin+0.3 250 Without PCB 357 Power Dissipation With PCB TBD Operating Temperature TOPR 2585 Storage Temperature TSTG 55150 Junction Temperature Tj 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 Power Supply Vin Logic Input Voltage VCE Input Ripple Voltage Vin(ripple) Capacitance for Charge Pump C1/2
Min. 2.8 0 0.8
Typ. 1.0
Max. 5.5 Vin 40 4.0
Unit V V mVpp F
This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 3)
TOSHIBA
Electrical Characteristics Item Input Voltage Maximum Output Voltage Vin3.6V, TOPR25, if it is not specified. Symbol Vin Vout 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=3.2VVout=4.2V VFB10.4V Vin=3.2VVout=4.2V VFB10.4V CE1="H"CE2="H" Vin=2.84.2V Iout=100mA Iout=0mA CE1/2="L" Logic Inputs Logic Inputs Logic Inputs CE1/CE2="L" Vin=3.6V Vout=4.0V Vin=2.8VIout=10mA The transition time when Vout from 0V to 4V Rush Current at CE "H" Measur ement Circuit Measurement Condition Min. 2.8 4.0 (94) (188) (282) (376) 90
TB62733FTG
Typ.
Max. 5.5
Unit V V mV mV mV mV A mA
100 200 300 400 110
(106) (212) (318) (424) 0.5
Feed Back Terminal Voltage Tolerance of Current Setting
VFB1 VFB2
Feed Back Terminal Input Current
IFB Iout12
Output Current Ability Iout(MAX) Consumption Current Stand By Consumption Current Logic Input Voltage Logic Input Current
Auto Discharging
180 0.7xVin
7
5 1 0.3xVin 0.5
mA mA A V V A mA
IDD IDDSTB VIH VIL Ileak Iauto
High Low
Vout Rise Time
Clock Frequency fOSC
0.85
1.2
500
1.55
s
MHz
Rush Current
IRUSH
500
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
Explanation of Operations 1.5 times Up converting operation
TB62733FTG
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. Vin C1 Vout
C2
2. Out put from C1 and C2 yjat are charged
Vin C1
Vout
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.
C2
3. By repeating the operation 1 and 2 described above, the voltage is supplied to Vout around 1.5 times of Vin.
This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 5)
TOSHIBA
Feed Back Voltage Control
TB62733FTG
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
Vout1 Feed back Control 1 FB1 RX C3
2.0F
LED ON
Feed back Control 2
Vout2
C3
2.0F
LED ON
FB2 RX
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.
Vout 1 operating
Vout1 Feed Back Control 1 FB1 RX C3
2.0F
LED ON
Vout2
C3
2.0F
FB2 RX
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
3. Vout 2 Operating
Vout1 C3
2.0F
TB62733FTG
FB1 RX
LED OFF
Feed Back Control 2
Vout2
C3
2.0F
LED ON
FB2 RX
Truth Table (CE1 and CE2) CE1 CE2 Output Terminal L L None H L H L H H Vout1 Vout2 Vout1,Vout2
Feed Back Control None FB1 FB2 FB1FB2
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. ILEDVFBRX The brightness control is available with feed back voltage control. Truth Table for Current Control SP1 SP2 FB Control Voltage L L 0.1V L H 0.2V H L 0.3V H H 0.4V
LED Current at Resistor(RX)20 5mA 10mA 15mA 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. This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 7)
TOSHIBA
Application Example
TB62733FTG
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.
Application Figure 1
C1 C1 C2 FB1 C2 Vin GND SP1 SP2 CE1 CE2 FB2
0.4V 20 20 20 20 0.4V
C1
1.0F
Vout1
C2
1.0F
Main Display 1LED : 20 Total 80 mA
20 20 20 20
2.84.2V C4
1.0F
Vout0 C3
2.0F
Vout2 Sub Display 1LED Total 80 mA
Application Figure 2
C1 C1 C2 FB1 C2 Vin GND SP1 SP2 CE1 CE2 FB2
0.4V 20 20 0.4V 20 20 20 20 20 20
C1
1.0F
Vout1 Main Display 1 LED18 Total 108 mA
C2
1.0F
2.84.2V C4
1.0F
Vout0 C3
2.0F
Vout2 Sub Display 1 LED 20 mA Total 40 mA
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 8)
TOSHIBA
2. In case of driving both Backlighting (Main/Sub Displays) and Key pad Illumination
TB62733FTG
By using external MOS FET, the system of driving for main , sub display and Key pad Illumination is also composed.
Application Figure 3
C1
1.0F
C1 C1 C2
Vout1
C2
1.0F
FB1 C2 Vout0 Vin GND SP1 SP2 CE1 CE2 FB2 Vout2
0.4V 20 20 20 20
2.84.2V C4
1.0F
Main Display 1 LED20 mA Total 80 mA
20
50
C3
2.0F
Key Pad 1 LED5 mA Total 10 mA Sub Display 1 LED : 20 mA Total 60 mA
0.4V 20 20 20
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
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.
Application Figure 4
C1
1.0F
C1 C1 C2
Vout1
C2
1.0F
FB1 C2 Vout0 Vin GND SP1 SP2 CE1 CE2 FB2
0.4V 20 20 20 20
Main Display 20 TOTAL 80
2.84.2V C4
1.0F
C3
2.0F
Vout2 NC
NC
These figures are showing as the standard application example. The current values or so are considered whenever it is designed.
This datasheet is tentative, the values and contents are subject to change without any notice. 27-Jul-04 (Rev1.7) TB62733FTG (Page. 9)
TOSHIBA
Application Figure 5
90mA
TB62733FTG
C1
1.0F
C1 C1 C2
Vout1
C3
2.0F
C2
1.0F
FB1 C2 Vin GND SP1 SP2 CE1 CE2 FB2 Vout2 Vout0
0.4V
2.84.2V C4
1.0F
C
2.0F
20
20
20
20
20
20
20
20
90mA
C3
2.0F
Main Display 1 LED TOTAL
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
The characteri cs of P ow er D i pati A ssbl on P C B sti ssi on ed 0. 9 0. 8 0. 7 0. 6 0. 5 0. 4 0. 3 0. 2 0. 1 0 0 25 50 75 100 A m bi Tem perature[ ent 125 150 Power Dissipation
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=Vf(LED)+0.4V
100%
Ef f iciency
Output Voltage [V]
4. 0 3. 8
90% 80%
Efficiency(%)
3. 6 3. 4 3. 2 3. 0 2. 8 2. 6 2. 4 2. 2 2. 0 2. 5 3. 0 3. 5 4. 0 4. 5
70% 60% 50% 40% 30% 20% 10% 0% 2. 5 3. 0 3. 5 4. 0 4. 5
I o=200m A I o=100m A I o=40m A
I nput V ol tage [V ]
I 40m A o= I o=100m A I o=200m A
I nput V ol tage [V ]
O utput V ol tage operate abii lty
420. 0
Feedback V ol tage
V =0. 4V
4. 0 3. 5 3. 0 2. 5 2. 0 1. 5 1. 0 0 50 100 150 200 250 300
Feedback Voltage [mV]
Output Voltage [V]
400. 0 380. 0 360. 0 340. 0 320. 0 300. 0 280. 0 260. 0 240. 0 220. 0 2. 5 3. 0 3. 5 4. 0 4. 5
Vi n=2. 7V Vi n=3. 0V Vi n=3. 3V
O utput C urrent [m A }
I o=200m A I o=100m A I o=40m A
I nput V ol tage [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
Package Dimension
TB62733FTG
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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