tb7109f TOSHIBA Semiconductor CORPORATION, tb7109f Datasheet
tb7109f
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tb7109f Summary of contents
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... TOSHIBA BiCD Integrated Circuit Silicon Monolithic Power supply IC for LNB The TB7109F is single chip power supply ICs for LNB that integrated buck DC-DC converter section utilizing a chopper circuit and series regulator section. The TB7109F MOSFETs for the high side main switch to achieve high efficiency. And series regulator section is fed into a overcurrent circuit of fold buck type, and it protects this product from the short circuit state of the load ...
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... This input is fed into an internal error amplifier with a reference voltage of 1.215 V (typ.). Enable pin When the switching operation of the output section. When V circuitry is disabled, putting the TB7109F in Standby mode. This pin has an internal pull-up current of 15µA(typ.). Feedback pin for the DC-DC Converter section 8 V FB1 This input is fed into an internal error amplifier with a reference voltage of 1 ...
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... A negative voltage generated in dead time is permitted among the switch pin current (I Note 2: Glass epoxy board 25.4 × 25.4 × 0.8 pulse width Single-pulse measurement: Note 3: The TB7109F may go into thermal shutdown at the rated maximum junction temperature. Thermal design is required to ensure that the rated maximum operating junction temperature, T (Ta = 25°C) (Note) Symbol Rating V -0.3～ ...
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... OUT2 V = 24V , V = 17V IN1 IN2 I LIM2( 12.5V FB2 OUT2 V = 24V , V = 17V IN1 IN2 I LIM2( FB2 OUT2 4 TB7109F Min Typ. Max ⎯ ⎯ ⎯ 5 ⎯ ⎯ 70 ⎯ ⎯ 1.8 ⎯ ⎯ 0.5 −5 ⎯ 5 ⎯ −15 ⎯ ⎯ ⎯ ...
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... IN1 μ μ 4 CRS20I40B GND μ 10kΩ Figure 1 TB7109F Application Circuit Examples L V IN2 OUT2 IN1 V FB1 TB7109F V FB2 GND C OUT1 = 24V 17.4V, V IN1 OUT1 μ IN2 V OUT2 ...
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... Rectifier Selection A Schottky barrier diode should be externally connected to the TB7109F as a rectifier between the L GND pins recommended CRS20I40B or equivalent be used as Schottky barrier diode large voltage overshoot is on the L ...
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... V Series Regulator section Overcurrent Protection（OCP） TB7109F is fed into a overcurrent circuit of fold buck type, and it protects this product from the overcurrent state of the load. Figure 4 Overcurrent Protection Operation Setting the Output Voltage A resistive voltage divider is connected as shown in Figure 5 to set the output voltage ...
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... The TB7109F provides thermal shutdown. When the junction temperature continues to rise and reaches T (155°C typ.), the TB7109F goes into thermal shutdown and shuts off the power supply. TSD has a hysteresis of about 10°C (typ.). The device is enabled again when the junction temperature has dropped by approximately 10° ...
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... Parts of this product in the surrounding are examples of the representative, and the supply might become impossible. Please confirm latest information when using it. • External components such as capacitors, inductors and resistors should be placed as close to the TB7109F as possible. • C should be connected as close to the GND and board layout and a characteristics of capacitance ...
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... V FB1 = - 100 125 (°C) j IN1 7.0 6.5 6.0 5.5 5.0 4.5 4.0 -50 6 6.5 7 (V) IN1 10 TB7109F I – T IN1 IN1 = 24V V FB1 = V FB2 = 0V - 100 Junction temperature T (° – V IH(EN IN1 = V IN2 = 24V V FB1 = V FB2 = 25° ...
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... Junction temperature T 460 420 380 340 300 25 30 -50 -25 Junction temperature T 150 100 50 0 -50 -100 -150 0 TB7109F V – T FB2 j V IN1 = VIN2 = 24V IN1 100 125 (° – T OSC j V IN1 = 24V ...
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... Output current I ΔV (Series regulator section) 150 V IN1 = 24V V OUT1 = 13 . OUT2 = 12.0V 100 μ OUT2 = 4.7μ 25° CRS20I40B 50 0 -50 -100 -150 0 0.1 0.4 Output current I 12 TB7109F η – I OUT1 V IN1 = 24V V OUT1 = 13. μH C OUT1 = 4.7μ 25° CRS20I40B 0.2 0.3 0.4 0.5 (A) OUT1 0.6 0.9 1.2 1.5 ...
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... Output current I Startup Characteristics (Internal Soft-Start Time) V IN1 = 24V V OUT1 = 13.3V V OUT2 = 12. 25° 22μH 13 TB7109F V IN1 = 24V , Ta = 25°C V OUT1 = 13.3V V OUT2 = 12.0V 0.4 0.6 0.8 (A) OUT2 Output voltage : V OUT1 (5V/div) Output voltage : V OUT2 (5V/div) EN input voltage:V EN :L→H 1 ms/div 2011-05-19 ...
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... Package Dimensions HSON8-P-0505-1.27 Weight: 0.068 g (typ.) 14 TB7109F Unit: mm 2011-05-19 ...
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... Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product. Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances, including without limitation, the EU RoHS Directive. TOSHIBA assumes no liability for damages or losses occurring as a result of noncompliance with applicable laws and regulations. 15 TB7109F 2011-05-19 ...