tb62732fug TOSHIBA Semiconductor CORPORATION, tb62732fug Datasheet
tb62732fug
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tb62732fug Summary of contents
Page 1
... Also, the LED current I can be easily set through the use external resistor. The TB62732FUG is best suited for use as a driver for white LED source backlighting in color LCDs used on PDAs, cellular phones and handy terminal devices. The suffix (G) appended to the part number represents a Lead (Pb) -Free product ...
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... IC enable pin.If Low, Standby Mode takes effect and pin A is 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 TB62732FUG K 2006-06-14 ...
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... V CC ⎯ 4 ⎯ 4 ⎯ SHDN = High and Low level tpw SHDN = ⎯ illuminating series LEDs TB62732FUG 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 ⎯ TB62732FUG 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 basic TB62732FUG circuit uses a step-up DC/DC converter, and features peak control of the current pulse. The inductance is turned on and off with the fixed frequency f with energy. When the inductance is turned on, the inductor current IL increases from and when IL = ILpeak is reached, the inductance is turned off ...
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... As a result, a constant current is controlled as an average current in the LED. Therefore, if R_sens = 2.7 Ω is connected The TB62732FUG is designed to be able to supply a load power of 320 mW (min.). With an inductance of 4 µH, the boost inductor has been optimally designed for this load power of 320 mW. ...
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... 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 = 4.3 V TB62732FUG LED F LED (V), F 2006-06-14 ...
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... The zener diode in the example application circuit in Figure 1 is necessary for over-voltage protection when the LED is open strongly recommended that a zener diode be connected since this driver lacks a voltage protection circuit. The zener voltage should satisfy the following conditions: i) ≤ maximum output voltage of the TB62732FUG ii) ≥ LED aggregate 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 TB62732FUG 2 5.5 4 TB62732FUG TB62732FUG 1 2 5.5 9 TB62732FUG OSC 5 2006-06-14 ...
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... Number of LED 4.2 Note 6: The above values have been obtained through Toshiba’s own measurements. However, results may vary according to the measurement environment. 10 TB62732FUG > 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 above values have been obtained through Toshiba’s own measurements. However, results may vary according to the measurement environment. 11 TB62732FUG > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 ...
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... F IN Number LED 2 19 19.5 to 20.5 4.2 4 19.6 to 20.7 Note 10: The above values have been obtained through Toshiba’s own measurements. However, results may vary according to the measurement environment. 12 TB62732FUG > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 ...
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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 above values have been obtained through Toshiba’s own measurements. However, results may vary according to the measurement environment. 13 TB62732FUG > 4 – Efficiency LEDs efficiency 3 LEDs 3.6 3.8 4 4 ...
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... Package Dimensions Weight: 0.016 g (typ.) 14 TB62732FUG 2006-06-14 ...
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... Otherwise, the current or power consumption may exceed the absolute maximum rating, and exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or combustion. In addition, do not use any device that is applied the current with inserting in the wrong orientation or incorrectly even just one time. 15 TB62732FUG 2006-06-14 ...
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... DC voltage will increase. If this output voltage is connected to a speaker with low input withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The over current can cause smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied Load (BTL) connection type IC that inputs output DC voltage to a speaker directly. 16 TB62732FUG 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 absolute maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in system design. 17 TB62732FUG 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 18 TB62732FUG 060116EBA 021023_E 2006-06-14 ...