tb62732fu TOSHIBA Semiconductor CORPORATION, tb62732fu Datasheet
tb62732fu
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tb62732fu Summary of contents
Page 1
... TOSHIBA BiCD Digital Integrated Circuit Silicon Monolithic Step-up DC/DC Converter for White LED Driver TB62732FU is the high efficiency Step-up type DC/DC converter that it is designed suitably in constant current lighting of white LED the most suitable for turning serial white LEDs with a Li-ion battery. ...
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... When Low, Standby Mode and pin A turned off. Input pin for power supply for operating the IC Operating voltage range: 3.0 to 5.5 V DC-DC converter switch pin The switch is an N-channel MOSFET transistor. Note 2: Connect both GND pins to ground GND Function 2 TB62732FU K 2006-06-14 ...
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... V CC ⎯ 4 ⎯ 4 ⎯ SHDN = High and Low level tpw SHDN = ⎯ turn on series LEDs TB62732FU Unit °C/W °C °C °C Min Typ. Max Unit ⎯ 3.0 4.3 V ⎯ 2 ⎯ ...
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... Ron detection resistance value is contained ⎯ ⎯ f OSC ⎯ ⎯ V (A) o ⎯ ⎯ I (A) o ⎯ ⎯ I (A) oz ⎯ I R_sens = 2.7 Ω 6.8 µH ⎯ TB62732FU Min Typ. Max Unit ⎯ 3.0 5.5 V ⎯ 0.52 0.8 mA ⎯ µA 0.5 1.0 ⎯ µA 4.2 7 ⎯ Ω 2.0 2.5 0.77 1.1 1.43 MHz ⎯ ⎯ ⎯ ...
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... MHz SHDN Figure 1 Application Circuit Basic Operation The step-up DC/DC converter is applied, and the basic circuit to the TB62732FU adopts peak control of the current pulse. The internal MOS transistor NMOS is turned on in the fixed frequency f energy in the inductance. Inductance electric current IL turns off NMOS when it reaches 80% of 1/1 MHz when it increased from and it reached IL = ILpeak = 350 (mA, typ ...
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... Current consumption in Standby Mode is 1 µA (max). Drive Waveform A left figure is an actual drive waveform. From the top, the switching voltage waveform of the coil of the generator terminal, the feedback voltage wave form of the K terminal, and I 200 ns/DIV 6 TB62732FU o (peak (peak LED ...
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... It is sufficient by the above calculation on the standard condition. F Note Recommend min) × 2 × (1/Ip min × Ip min formula 2 OSC LED + R_sens × I LED × (mA), LED forward voltage Unit MHz Unit MHz = TB62732FU peak. LED F LED (V), F 2006-06-14 ...
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... A zener diode in an application circuit example of the figure 1 is necessary for the over-voltage protection when LED becomes open recommended connecting a zener diode strongly because this driver doesn't have a voltage protection circuit. A zener voltage is to satisfy the following condition. i) Less than maximum output voltage of TB62732FU ii) Upper total series LED V F iii) ...
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... V (V) CC Current consumption at shutdown I (SHDN) CC 900 600 3.6 V 300 0 2.4 2.6 2.8 3 3.2 V (V) SHDN Output switching frequency 1.4 1.2 1 0.8 0.6 0.4 3 3 TB62732FU 2 5.5 4 TB62732FU TB62732FU 1 2 5.5 9 TB62732FU OSC 5 2006-06-14 ...
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... The I of the V F Number of LED 4.2 Note 6: The value is our company actual measurement value. The result has the possibility to be different by the measurement environment. 10 TB62732FU > 4 LEDs – Efficiency LEDs efficiency 3 LEDs ...
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... F IN Number LED 70 2 19.8 to 21.6 3 20 20.4 to 21.5 4.2 Note 8: The value is our company actual measurement value. The result has the possibility to be different by the measurement environment. 11 TB62732FU > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 3.0 to 4.3 V range ...
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... F IN Number LED 70 2 19.4 to 21.1 3 19 19.6 to 20.7 4.2 Note 10: The value is our company actual measurement value. The result has the possibility to be different by the measurement environment. 12 TB62732FU > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 3.0 to 4.3 V range ...
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... F IN Number LED 70 2 19.4 to 21.0 3 19 19.6 to 20.7 4.2 Note 12: The value is our company actual measurement value. The result has the possibility to be different by the measurement environment. 13 TB62732FU > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 3.0 to 4.3 V range ...
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... Package Dimensions Weight: 0.016 g (typ.) 14 TB62732FU 2006-06-14 ...
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... Toshiba does not grant any license to any industrial property rights by providing these examples of application circuits. 5. Test Circuits Components in the test circuits are used only to obtain and confirm the device characteristics. These components and circuits are not guaranteed to prevent malfunction or failure from occurring in the application equipment. 15 TB62732FU 2006-06-14 ...
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... If the current sink capability of the power supply is small, the device’s motor power supply and output pins might be exposed to conditions beyond maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in system design. 16 TB62732FU 2006-06-14 ...
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... 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. 021023_C • The products described in this document are subject to the foreign exchange and foreign trade laws. 021023_D 021023_B 060106_Q 17 TB62732FU 060116EBA 021023_E 2006-06-14 ...