TB62750FTG MARKTECH | Alldatasheet

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（ＶQON24-0404-0.65） Weight： 0.09g (Typ.) 現品表示 ； TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic TB62750FTG Step Up Type DC-DC Converter for White LED TB62750FTG 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 white LEDs whose constant output current is 800mA 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. This IC is the most suitable as a driver of camera flashes and strobes in the cellular phone, the PDA, the DSC, and other mobiles. ■ Features ・Switching terminal current :1.8A(Typ.) ・Maximum output power ・Maximum output voltage :10V ・Operating frequency :2MHz ・Four operating modes Light mode :ILED=350mA(Typ.) (R3=8.2kΩ,R2=62kΩ) Flash mode :ILED=800mA(Typ.) (RSENS=0.375Ω) Shutdown mode :Icc=0.01µA(Typ.) ・High efficiency :Maximum efficiency : 80%(In the flash mode) Application S-Di VIN(3.0～4.2) L GND Cout 800mA (TYP) Cin PGND1 PGND2 PGND3 SS EN2 EN1 VIN SW1SW2 SW3 OVP RSENS1 RSENS2 RSENS3 FB+ FB- IL Css Company Headquarters

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28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■Pin Assignment (top view) FB+ FB- NC NC IL SS NC VIN AGND EN1 EN2 OVP SW1 PGND1 SW2 PGND2 SW3 PGND3 RSENS3 RSENS2 RSENS1

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■ Block Diagram Cin VIN OVP AGND L VIN EN1 EN2 Cout S-Di PGND1 PGND2 PGND3 IL SS RSENS3 RSENS2 RSENS1 FB+ FB- SW1 SW2 SW3 Css

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■ Explanation of the Terminal No. Symbol Function Connected to the LED cathode. RSENS3 Connected to the current-setting resistor: R1 for the flash. Connected to the LED cathode. RSENS2 Connected to the current-setting resistor: R1 for the flash. Connected to the LED cathode. RSENS1 Connected to the current-setting resistor: R1 for the flash. FB+ FB- Detecting the voltage of the current-setting resistor: R1 for the flash. It can change the light-mode-current with the resistor: R3 which is connected to FB+. NC No Connect NC No Connect IL Connected to the ILED setting resistor: R2 in the light mode. The light-mode-current is changed depending on the setting ratio of R2 and R3. SS Setting the constant to limit the current when DC-DC operation starts. The rising time is changed depending on the constant of the condenser. PGND3 Ground terminal for the power device. SW3 Switching the DC-DC converter. Nch MOSFET is built-in. PGND2 Ground terminal for the power device. SW2 Switching the DC-DC converter. Nch MOSFET is built-in. PGND1 Ground terminal for the power device. SW1 Switching the DC-DC converter. Nch MOSFET is built-in. OVP Detecting the over-voltage. EN2 Inputting the logic signals which set the modes. "ON" :Flash mode "OFF" :Lighting mode EN1 Inputting the logic signals which set the modes. "ON" :DC-DC operation "OFF" :Stop AGND Ground terminal for analog. VIN Inputting the power supply voltage to the IC. The operating voltage is 2.8 to 5.5V. NC No Connect

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■ Absolute Maximum Ratings (Topr = 25°C if not specified) Characteristics Symbol Ratings Unit Power supply voltage VCC - 0.3 ～ 6.0 V Input voltage Vin - 0.3 ～ VIN + 0.3 V Switching terminal voltage Vo(SW) - 0.3 ～ 12 V Output current Iout 1000 mA Operating temperature range Topr - 40 ～ 85 Storage temperature Tstg - 55 ～ 150 ■ Recommended Operating Condition (Topr = −40 to 85°C if not specified) Characteristics Symbol Test Conditions Min. Typ. Max. Unit Power supply voltage VIN 2.8 5.5 V HIGH VIH 0.7XVIN VIN +0.15 Logic Input Voltage LOW VIL EN1,EN2 -0.15 0.3X VIN V Constant-current output Iout 800 1000 mA Flash mode 0.375 Ω kΩ ISET Resistor Light mode 8.2 kΩ Input condenser Cin µF Output condenser Cout µF Condenser for soft start Css 2200 3300 10000 pF External inductor L 3.9 µH

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■ Electrical Characteristics (Topr = −40~85°C VCC = 2.8~5.5 V if not specified.) Characteristics of DC-DC regulator. (Topr = - 40～85°C, VIN = 2.8～5.5V if not specified) Characteristics Symbol Test Conditions Min. Typ. Max. Unit Power supply voltage VIN 2.8 5.5 V Operating consumption current IIN(On) EN1=”H”, EN2=”L” Vin=3.6V, R2=62kΩ R3=8.2kΩ, R1=0.375Ω TBD mA Quiescent consumption current IIN(Off) EN1=”L”, EN2=”L” Vin=3.6V 0.01 0.5 µA Input current (Logic input terminal) IINEN1 IINEN2 Vin=3.6V 0.5 µA Integrated MOS-Tr switching frequency fosc Vin=3.6V 1.6 2.4 MHz SW terminal protection voltage Vo(SW) V Switching terminal current Io(SW) 1.8 A Switching terminal leakage current Ioz(SW) 0.5 µA EN1=”H”, EN2=”H” Vin=3.6V, R1=0.375Ω Topr=25℃ 285 300 315 mV FB terminal feedback voltage VFB EN1=”H”, EN2=”L” Vin=3.6V, R1=0.375Ω R2 = 62kΩ,R3 =8.2kΩ Topr=25℃ TBD 130 TBD mV FB terminal line regulation ΔVFB Vin=3.6V (typ.) Vin=3.0～4.2V OVD voltage (OVD terminal) VOVD 10.7 V TSD 120 157 180

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative Characteristics of constant-current of SINK(Topr = 25°C, Vcc = 3.6V if not specified.) Characteristics Symbol Test Conditions Min. Typ. Max. Unit ISET output current (Light mode) ISET EN1 = “H” EN2 = “L” R2= 62kΩ, R3= 8.2kΩ R1 = 0.375Ω µA ISET output voltage (Light mode) VISET EN1 = “H” EN2 = “L” R2= 62kΩ TBD V Lighting time in flash mode t FLASH Tolerance time under EN2 = “H” and EN1 = “H”. R1 = 0.375Ω 100 300 ms

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative ■ Explanation of operation 【Setting the operating mode】 1.Selecting the four modes shown below with logic input terminals: EN1 and EN2. EN1 EN2 MODE L L L H Shutdown mode H L Light mode H H Flash mode ・Flash mode It can be driven with the constant-current at 800mA (max.).The maximum lightning time is 300ms. Because it controls the FB+ at 300mV, the equation shown below is obtained. Iout(mA)=300(mV)÷R1(Ω) Pay attentions to the differences of the connected resistors and the power consumption. The recommended resistor is as follows; ・Three or more resistors (1/4 W) in parallel. ・Light mode It can light continually by driving at constant-current (350mA in max.). It sets the current of K1 to K3 based on the resistors: R1, R2, and R3. The current value of IL is recommended at about 20μA. Set R2 at 51kΩ to 75kΩ. When R3 is set at 0Ω, the same current is set in the flash mode and the light mode. ・Shutdown mode It stops the operation. Iout（mA）＝ 1.2V（Internal Vref）X R2 0.3V -

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative 【Setting the input condenser】 TBD 【Setting the output condenser】 TBD 【Setting the external inductor】 Operating frequency : 2MHz The circuit operation has the consecutive mode method. The ability of the output current is changed by the constant of the inductor. 【Soft start function】 This function is built-in to avoid the over-inserting current and the power drop when the flash mode and the light mode switch. When the condenser (Approximately 3300pF) is connected to the SS terminal, the rising time becomes about 300μ s in the flash mode. 【OVD function】 OVP voltage: Detecting the over-load at 10.7V(TYP). When the loaded voltage of OVP rises because of the LED opening or something other, this function shutdowns the IC. The operation recovers just after the voltage of OVP falls to 10.7V or less. 【TSD function】 MAX 180℃ MIN 120℃

28-Apr-05 (Rev0.2) TB627350FTG (Page. /11) Tentative

  • The information contained herein is subject to change without notice.
  • The information contained herein is presented only as a guide for the applications of our products. No responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of TOSHIBA or others.
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  • The TOSHIBA products listed in this document are intended for usage in general electronics applications (computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this document shall be made at the customer’s own risk.
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  • TOSHIBA products should not be embedded to the downstream products which are prohibited to be produced and sold, under any law and regulations. 030619EBA RESTRICTIONS ON PRODUCT USE The following conditions apply to solderability.
  • Solderability (1) Use of Sn-63Pb solder bath
  • solder bath temperature = 230°C, dipping time = 5 seconds, number of times = once, use of R-type flux (2) Use of Sn-3.0Ag-0.5Cu solder bath
  • Particular care is necessary in the design of the output, VCC, COMMON and GND lines since the IC may be destroyed by short circuits between outputs, air contamination faults, or faults arising from improper grounding.
  • Do not insert devices in the wrong orientation. Make sure that the positive and negative terminals of power supplies are connected correctly. Otherwise the rated maximum current or power dissipation may be exceeded and the device may break down or undergo performance degradation, causing it to catch fire or explode and resulting in injury.
  • Note that the IC may be destroyed as a result of damage to or misconnection of external components. CAUTION SOLDERABILITY